Execution Version CERTAIN INFORMATION IN THIS DOCUMENT, MARKED BY [**], HAS BEEN EXCLUDED PURSUANT TO REGULATION S-K, ITEM 601(b)(10)(iv). SUCH EXCLUDED INFORMATION IS NOT MATERIAL AND IS THE TYPE THAT THE REGISTRANT TREATS AS PRIVATE OR CONFIDENTIAL....

Execution Version CERTAIN INFORMATION IN THIS DOCUMENT, MARKED BY [**], HAS BEEN EXCLUDED PURSUANT TO REGULATION S-K, ITEM 601(b)(10)(iv). SUCH EXCLUDED INFORMATION IS NOT MATERIAL AND IS THE TYPE THAT THE REGISTRANT TREATS AS PRIVATE OR CONFIDENTIAL. THE FOLLOWING INFORMATION IS SUPPLIED SOLELY FOR U.S. FEDERAL INCOME TAX PURPOSES. THE LOANS UNDER THIS AGREEMENT ARE TREATED AS HAVING BEEN ISSUED WITH ORIGINAL ISSUE DISCOUNT (“OID”) WITHIN THE MEANING OF SECTION 1273 OF THE INTERNAL REVENUE CODE OF 1986, AS AMENDED (THE “CODE”), AND THIS LEGEND IS REQUIRED BY SECTION 1275(c) OF THE CODE. INFORMATION INCLUDING THE ISSUE PRICE, THE AMOUNT OF ORIGINAL ISSUE DISCOUNT, THE ISSUE DATE AND THE YIELD TO MATURITY WILL BE PROVIDED IN WRITING TO A LENDER PROMPTLY UPON REQUEST TO THE BORROWER AT 000 X. XXXXXXXX XXXX, XXXXX 000, XXXXXXXX, XXXXXXXXXX 00000, ATTN: CHIEF FINANCIAL OFFICER, EMAIL: XXX@xxxxxxxxxxxxxxx.xxx. FINANCING AGREEMENT dated as of August 7, 2024 among ARROWHEAD PHARMACEUTICALS, INC., as Borrower, CERTAIN SUBSIDIARIES OF BORROWER, as Guarantors, VARIOUS LENDERS FROM TIME TO TIME PARTY HERETO, AND SIXTH STREET LENDING PARTNERS, as Administrative Agent

FINANCING AGREEMENT This FINANCING AGREEMENT, dated as of August 7, 2024, is entered into by and among ARROWHEAD PHARMACEUTICALS, INC., a Delaware corporation (“Company” or “Borrower”), and certain Subsidiaries of Borrower, as Guarantors, the Lenders from time to time party hereto, and SIXTH STREET LENDING PARTNERS, (“Sixth Street”), as administrative agent for the Lenders (in such capacity, “Administrative Agent”). W I T N E S E T H: WHEREAS, capitalized terms used in these Recitals shall have the respective meanings set forth for such terms in Section 1.1 hereof; WHEREAS, Lenders have agreed to extend certain senior secured credit facilities to Company, in an aggregate principal amount not to exceed $935,261,000, consisting of (a) an initial term loan in an aggregate principal amount not exceeding $400,000,000, (b) a delayed draw term loan an aggregate principal amount not exceeding $435,261,000 and (c) an uncommitted incremental facility in an aggregate principal amount not to exceed $100,000,000, in each case, the proceeds of which will be used as described in Section 2.2; WHEREAS, Company has agreed to secure all of its Obligations by granting to Administrative Agent, for the benefit of Secured Parties, a first priority Lien on all of its assets (except as otherwise set forth in the Collateral Documents), including a pledge of all of the Capital Stock of each of its Subsidiaries; and WHEREAS, Guarantors have agreed to guarantee the Obligations of Company hereunder and to secure their respective Obligations by granting to Administrative Agent, for the benefit of Secured Parties, a first priority Lien on all of their respective assets (except as otherwise set forth in the Collateral Documents), including a pledge or mortgage of all of the Capital Stock of each of their respective Subsidiaries. NOW, THEREFORE, in consideration of the premises and the agreements, provisions and covenants herein contained, the parties hereto agree as follows: ARTICLE I DEFINITIONS AND INTERPRETATION Section 1.1 Definitions. The following terms used herein, including in the preamble, recitals, exhibits and schedules hereto, shall have the following meanings: “Administrative Agent” has the meaning specified in the preamble hereto. “Administrative Agent’s Account” means an account at a bank designated by Administrative Agent from time to time as the account into which the Loan Parties shall make all payments to Administrative Agent under this Agreement and the other Loan Documents. “Adverse Proceeding” means any action, suit, claim, proceeding (whether administrative, judicial or otherwise), governmental investigation or arbitration (whether or not purportedly on behalf of Borrower or any of its Subsidiaries) at law or in equity, or before or by any Governmental Authority, domestic or foreign (including any Environmental Claims) or other regulatory body or any mediator or arbitrator,

- 2 - whether pending or, to the knowledge of the Loan Parties, threatened in writing against Borrower or any of its Subsidiaries or any property of Borrower or any of its Subsidiaries. “Affiliate” means, as applied to any Person, any other Person directly or indirectly controlling, controlled by, or under common control with, that Person. For the purposes of this definition, “control” (including, with correlative meanings, the terms “controlling,” “controlled by” and “under common control with”), as applied to any Person, means the possession, directly or indirectly, of the power (a) to vote 15% or more of the securities having ordinary voting power for the election of directors of such Person, or (b) to direct or cause the direction of the management and policies of that Person, whether through the ownership of voting securities or Capital Stock, by contract or otherwise. Notwithstanding anything herein to the contrary, in no event shall Administrative Agent or any Lender or any of their Affiliates or Related Funds be considered an “Affiliate” of any Loan Party. “Aggregate Amounts Due” has the meaning specified in Section 2.13. “Aggregate Payments” has the meaning specified in Section 7.2. “Agreed Security Principles” has the meaning specified in Section 5.12(a). “Agreement” means this Financing Agreement and any annexes, exhibits and schedules attached hereto, as it may be amended, supplemented or otherwise modified from time to time. “Anti-Corruption Laws” means all Requirements of Law concerning or relating to bribery or corruption, including, without limitation, the United States Foreign Corrupt Practices Act of 1977, and the anti-bribery and anti-corruption laws and regulations of those jurisdictions in which the Loan Parties do business. “Anti-Terrorism Laws” means any Requirement of Law relating to terrorism or money laundering, including, without limitation, (a) the Money Laundering Control Act of 1986 (i.e., 18 U.S.C. §§ 1956 and 1957), (b) the Currency and Foreign Transactions Reporting Act (31 U.S.C. §§ 5311-5330 and 12 U.S.C. §§ 1818(s), 1820(b) and 1951-1959) (the “Bank Secrecy Act”), (c) the USA PATRIOT Act, (d) the laws, regulations and Executive Orders administered by the United States Department of the Treasury’s Office of Foreign Assets Control (“OFAC”), (e) the Comprehensive Iran Sanctions, Accountability, and Divestment Act of 2010 and implementing regulations by the United States Department of the Treasury, (f) any law prohibiting or directed against terrorist activities or the financing of terrorist activities (e.g., 18 U.S.C. §§ 2339A and 2339B), or (g) any similar laws enacted in the United States or any other jurisdictions in which the parties to this Agreement operate, as any of the foregoing laws may from time to time be amended, renewed, extended, or replaced and all other present and future legal requirements of any Governmental Authority governing, addressing, relating to, or attempting to eliminate, terrorist acts and acts of war and any regulations promulgated pursuant thereto. “Application Event” means the (a) occurrence of an Event of Default and (b) the election by Administrative Agent or the Required Lenders during the continuance of such Event of Default to require that payments and proceeds of Collateral be applied pursuant to Section 2.12(f). “ARO-HBV” means the pharmaceutical product candidate having the chemical structures set forth on Schedule 1.1(a), including all forms (including salt forms), presentations, strengths, doses, and formulations (including any method of delivery), either alone or as a Combination Product, and all other “Licensed Products” (as defined in the ARO-HBV License Agreement) licensed or sublicensed to one or more third parties under the ARO-HBV License Agreement.

- 3 - “ARO-HBV License Agreement” means that certain Amended and Restated License Agreement by and between Arrowhead Pharmaceuticals, Inc. and GlaxoSmithKline Intellectual Property (No. 3) Limited dated as of December 11, 2023. “Asset Sale” means a sale, lease or sublease (as lessor or sublessor), sale and leaseback, assignment, conveyance, transfer, license or sublicense or other disposition to (other than to a Loan Party), or any exchange of property with, any Person (other than to a Loan Party), in one transaction or a series of transactions, in each case of all or any part of any Loan Party’s businesses, assets or properties of any kind, whether real, personal, or mixed and whether tangible or intangible, including but not limited to any Product Intellectual Property Rights, Platform Intellectual Property Rights, Registrations, Regulatory Documentation, or Collateral, whether now owned or hereafter acquired, including the Capital Stock of any Loan Party (but excluding any issuance, sale, transfer or other disposition of Capital Stock of the Borrower). For purposes of clarification, “Asset Sale” shall include the following transactions (other than with Loan Parties): (a) the sale or other disposition for value of any contracts to a third party, (b) any disposition of property through a “plan of division” under the Delaware Limited Liability Company Act or any comparable transaction under any similar law, (c) the early termination (other than in accordance with its terms) or modification of any contract resulting in the receipt by any Loan Party of a cash payment or other consideration (other than reversion of Intellectual Property) in exchange for such event, (d) any sale of accounts (or any rights thereto (including, without limitation, any rights to any residual payment stream with respect thereto)) by any Loan Party or Subsidiary of Borrower or (e) any sale, lease or sublease (as lessor or sublessor), sale and leaseback, assignment, conveyance, transfer, license or sublicense or other disposition (i) of Capital Stock pursuant to any Joint Venture, (ii) pursuant to any Product Agreement, (iii) pursuant to any Permitted Product Transaction, (iv) pursuant to any Royalty Monetization Transaction, (v) pursuant to any Permitted Zodasiran Agreement or (vi) of economic rights or Intellectual Property Rights related to the Products or Platform Technology of the Company and its Subsidiaries. “Assignment Agreement” means an Assignment and Assumption Agreement substantially in the form of Exhibit C, with such amendments or modifications as may be approved by Administrative Agent. “Authorized Officer” means, as applied to any Person, any individual holding the position of chairman of the board (if an officer), director, chief executive officer, president or one of its vice presidents (or the equivalent thereof), and such Person’s chief financial officer or treasurer. “Bank Secrecy Act” has the meaning specified in the definition of “Anti-Terrorism Laws”. “Bankruptcy Code” means Title 11 of the United States Code entitled “Bankruptcy,” as now and hereafter in effect, or any successor statute. “Beneficial Ownership Certification” means a certification regarding beneficial ownership required by the Beneficial Ownership Regulation. “Beneficial Ownership Regulation” means 31 C.F.R. § 1010.230. “Beneficiary” means Administrative Agent and each Lender. “Benefit Plan” means any of (a) an “employee benefit plan” (as defined in Section 3(3) of ERISA) that is subject to Title I of ERISA, (b) a “plan” as defined in Section 4975 of the Internal Revenue Code to which Section 4975 of the Internal Revenue Code applies and (c) any Person whose assets include (for purposes of the Plan Asset Regulations or otherwise for purposes of Title I of ERISA or Section 4975 of the Internal Revenue Code) the assets of any such “employee benefit plan” or “plan”.

- 4 - “Blocked Person” means any Person: (a) that is publicly identified (i) on the most current list of “Specially Designated Nationals and Blocked Persons” published by OFAC or resides, is organized or chartered, or has a place of business in a country or territory subject to OFAC sanctions or embargo program or (ii) as prohibited from doing business with the United States under the International Emergency Economic Powers Act, the Trading With the Enemy Act, or any other Anti-Terrorism Law; (b) that is owned or controlled by, or that owns or controls, or that is acting for or on behalf of, any Person described in clause (a) above; (c) which any Lender is prohibited from dealing or otherwise engaging in any transaction by any Anti-Terrorism Law; and (d) that is affiliated or associated with a Person described in clauses (a), (b), or (c) above. “Board of Directors” means, (a) with respect to any corporation or company, the board of directors of the corporation, company or any committee thereof duly authorized to act on behalf of such board, (b) with respect to a partnership, the board of directors of the general partner of the partnership, (c) with respect to a limited liability company, the managing member or members or any controlling committee or board of directors of such company or the sole member or the managing member thereof, and (d) with respect to any other Person, the board or committee of such Person serving a similar function. “Borrower” has the meaning specified in the preamble hereto and is interchangeable with the term “Company”. “Business Day” means any day that is not a Saturday, Sunday or other day on which the Federal Reserve Bank of New York is closed. “Capital Lease” means, as applied to any Person, and subject to Section 1.2(a), any lease of any property (whether real, personal or mixed) by that Person (a) as lessee that, in conformity with GAAP, is or should be accounted for as a capital lease on the balance sheet of that Person or (b) as lessee which is a transaction of a type commonly known as a “synthetic lease” (i.e., a transaction that is treated as an operating lease for accounting purposes but with respect to which payments of rent are intended to be treated as payments of principal and interest on a loan for income tax purposes). “Capital Stock” means any and all shares, interests, participations or other equivalents (however designated) of capital stock of a corporation, any and all equivalent ownership interests in a Person (other than a corporation), including, without limitation, shares, partnership interests and membership interests, and any and all warrants, rights or options to purchase or other arrangements or rights to acquire any of the foregoing; provided that Capital Stock shall exclude debt securities and other Indebtedness convertible into or exchangeable for any of the foregoing (including without limitation, Permitted Convertible Indebtedness). “Cash” means cash, money, currency or a credit balance in any demand or Deposit Account or in any Securities Account or other investment account. “Cash Equivalents” means, as at any date of determination, (a) marketable securities (i) issued or directly and unconditionally guaranteed as to interest and principal by the United States Government, or (ii) issued by any agency of the United States the obligations of which are backed by the full faith and credit of the United States, in each case maturing within one year after such date, (b) marketable direct obligations issued by any state of the United States of America or any political subdivision of any such state or any public instrumentality thereof, in each case maturing within one year after such date and having, at the time of the acquisition thereof, a rating of at least A 1 from S&P or at least P 1 from Xxxxx’x, (c) commercial paper maturing no more than one year from the date of creation thereof and having, at the time of the acquisition thereof, a rating of at least A 1 from S&P or at least P 1 from Xxxxx’x, (d) certificates of deposit or bankers’ acceptances maturing within one year after such date and issued or accepted by any Lender or

- 5 - by any commercial bank organized under the laws of the United States of America or any state thereof or the District of Columbia that (i) is at least “adequately capitalized” (as defined in the regulations of its primary Federal banking regulator), and (ii) has Tier 1 capital (as defined in such regulations) of not less than $100,000,000, (e) shares of any money market mutual fund that (i) has substantially all of its assets invested continuously in the types of investments referred to in clauses (a) and (b) above, (ii) has net assets of not less than $500,000,000, and (iii) has the highest rating obtainable from either S&P or Xxxxx’x, (f) securities that are consistent with the Borrower’s investment policy, a copy of which has been delivered to the Lenders (including any amendments thereto after the Closing Date consented to by the Administrative Agent, such consent not to be unreasonably withheld), and (g) in the case of any Foreign Subsidiary, cash and cash equivalents that are substantially equivalent in such jurisdiction to those described in clauses (a) through (f) above in respect of each country that is a member of the Organization for Economic Co- operation and Development. “Change of Control” means, at any time, any of the following occurrences: (a) any Person or “group” (within the meaning of Rules 13d-3 and 13d-5 under the Exchange Act) (i) shall have acquired beneficial ownership of [**]% or more on a fully diluted basis of the voting and/or economic interest in the securities or Capital Stock of Borrower or (ii) shall have obtained the power (whether or not exercised) to elect a majority of the members of the Board of Directors (or similar governing body) of Borrower; provided that for purposes of this provision, any Person or group shall not be deemed to beneficially own Capital Stock to be acquired by such Person or group pursuant to a stock or asset purchase agreement, merger agreement, option agreement, warrant agreement or similar agreement (or voting or option or similar agreement related thereto) until the consummation of the acquisition of the Capital Stock in connection with the transactions contemplated; (b) except pursuant to a transaction expressly permitted by this Agreement, Borrower shall cease to beneficially own and control, directly or indirectly, 100% on a fully diluted basis of the economic and voting interest in the Capital Stock of each Loan Party; (c) the majority of the seats (other than vacant seats) on the Board of Directors (or similar governing body) of Borrower cease to be occupied by Persons who either (i) were members of the Board of Directors of Borrower on the Closing Date, or (ii) were nominated for election by the Board of Directors of Xxxxxxxx, a majority of whom were directors on the Closing Date or whose election or nomination for election was previously approved by a majority of such directors, in each case, excluding any director that is an interim appointee due to death or retirement; (d) any “change of control” or similar event shall occur under, and as defined in or set forth in the documents evidencing or governing any Indebtedness in an individual principal amount in excess of the Threshold Amount owed by Borrower or any of its Subsidiaries; or (e) the Common Stock fails to remain (i) registered with the SEC or (ii) publicly traded on and registered with a public securities exchange. “Closing Date” means the date on which the Initial Term Loans are made, which is August 7, 2024. “Closing Date Certificate” means a Closing Date Certificate substantially in the form of Exhibit D. “Collateral” means, collectively, all of the real, personal and mixed property (including Capital Stock) and all interests therein and proceeds thereof now owned or hereafter acquired by any Loan Party upon which a Lien is granted or purported to be granted by such Loan Party in favor of the Administrative

- 6 - Agent pursuant to the Collateral Documents as security for the Obligations; provided, however, that in no event shall Excluded Assets constitute Collateral. “Collateral Access Agreement” means a collateral access agreement in form and substance reasonably satisfactory to Administrative Agent. “Collateral Documents” means the Pledge and Security Agreement, the Collateral Access Agreements, if any, any Control Agreement, any Mortgages and all other instruments, documents and agreements delivered by any Loan Party pursuant to this Agreement or any of the other Loan Documents in order to grant to Administrative Agent, for the benefit of Secured Parties, a Lien on any real, personal or mixed property of that Loan Party as security for the Obligations, in each case, as such Collateral Documents may be amended or otherwise modified from time to time. “Combination Product” means [**]. “Commercialize” means any and all activities directed to (a) solely with respect to the Company and its Subsidiaries, the out-licensing of any Platform Technology or (b) the distribution, marketing, detailing, promotion, selling and securing of reimbursement of a Product (including the importing, selling and offering for sale of such Product), and shall include post-marketing approval studies to the extent required by a Governmental Authority, post-launch marketing, promoting, detailing, distributing, selling such Product, importing, exporting or transporting such Product for sale, and regulatory compliance with respect to the foregoing. When used as a verb, “Commercialize” shall mean to engage in Commercialization. Except with respect to post-marketing approval studies required by a Governmental Authority, Commercialization shall not include any activities directed to the research or development (including pre-clinical and clinical development) or manufacture of a Product. “Commercially Reasonable Efforts” means, with respect to the Borrower’s development or Commercialization of a Material Product, that level of efforts and resources commonly dedicated in the research-based pharmaceutical industry by a similarly situated biotechnology company of similar resources to the development or commercialization, as the case may be, of a product of similar commercial potential at a similar stage of development or commercialization for a similar therapeutic and disease area and of similar market potential, in each case taking into account issues of safety and efficacy, product profile, the proprietary position (including patent and regulatory and data exclusivity), present and future market and commercial potential, the then current competitive environment for such product and the likely timing of such product’s entry into the market, the regulatory environment and status of such product (including likelihood of receiving regulatory approval or pricing and reimbursement approval), and other relevant scientific, technical and commercial factors. Notwithstanding the foregoing, Xxxxxxxx’s Commercially Reasonable Efforts shall be determined on a Material Product-by-Material Product and country-by-country basis and it is anticipated that the level of effort and resources that constitute “Commercially Reasonable Efforts” with respect to a particular Material Product or country will change over time, reflecting changes in the status of such Material Product, as applicable, and the country involved. “Commitment” means any Term Loan Commitment or Delayed Draw Term Loan Commitment. “Common Stock” means Borrower’s common stock. “Company” has the meaning specified in the preamble hereto and is interchangeable with the term “Borrower”. “Compliance Certificate” means a Compliance Certificate substantially in the form of Exhibit B.

- 7 - “Confidential Information” has the meaning assigned to such term in Section 10.20. “Connection Income Taxes” means Other Connection Taxes that are imposed on or measured by net income (however denominated) or that are franchise Taxes or branch profits Taxes. “Consolidated Total Cash” means, at any date of determination, total unrestricted cash and Cash Equivalents (other than restrictions created by the Collateral Documents and nonconsensual Permitted Liens described in clauses (u) and (v) of the definition thereof) as of such date, which, in connection with any determination under the definition of Permitted Acquisition, shall be determined on a pro forma basis, after giving effect to the applicable Permitted Acquisition, and in each case as certified by the chief financial officer or Authorized Officer of Borrower to Administrative Agent. “Contractual Obligation” means, as applied to any Person, any provision of any security issued by that Person or of any indenture, mortgage, deed of trust, contract (including, but not limited to, any Material Contract), undertaking, agreement, license or other instrument to which that Person is a party or by which it or any of its properties is bound or to which it or any of its properties is subject. “Control” means, with respect to any Intellectual Property Right, that an entity (a) owns or (b) has the right to grant access, a license or a sublicense (as applicable) to such Intellectual Property Right. “Control Agreement” means a “springing” control agreement, in form and substance reasonably satisfactory to Administrative Agent, executed and delivered by the applicable Loan Party, Administrative Agent, and the applicable securities intermediary (with respect to a Securities Account) or bank (with respect to a Deposit Account). “Copyrights” has the meaning ascribed to such term in the definition of “Intellectual Property Rights.” “Core Markets” means [**]. “Counterpart Agreement” means a Counterpart Agreement substantially in the form of Exhibit F delivered by a Loan Party pursuant to Section 5.10. “Credit Date” means the date of a Credit Extension. “Credit Extension” means the making of a Loan. “Data” means customer lists, correspondence, data, submissions and licensing and purchasing histories relating to customers of Borrower or any Subsidiary, and all other reports, information and documentation collected or maintained by Borrower or any Subsidiary regarding purchasers of Borrower’s or such Subsidiary’s products and the visitors to websites owned or controlled by Borrower or any of its Subsidiaries. “Data Protection Laws” means applicable Requirements of Law concerning the protection, privacy or security of Personal Information (including any applicable laws of jurisdictions where the Personal Information was collected or otherwise processed) and other applicable consumer protection laws, and all regulations promulgated thereunder, including, without limitation, the General Data Protection Regulation (and all laws implementing or supplementing it), the California Consumer Privacy Act, and Section 5 of the Federal Trade Commission Act.

- 8 - “Debtor Relief Law” means the Bankruptcy Code and any other liquidation, conservatorship, bankruptcy, assignment for the benefit of creditors, moratorium, rearrangement, receivership, insolvency, reorganization or similar debtor relief law of the United States or other applicable jurisdiction from time to time in effect. “Default” means a condition or event that, after notice or lapse of time or both, would constitute an Event of Default. “Default Excess” means, with respect to any Defaulting Lender, the excess, if any, of such Defaulting Lender’s Pro Rata Share of the aggregate outstanding principal amount of Term Loans of all Lenders (calculated as if all Defaulting Lenders (other than such Defaulting Lender) had funded all of their respective Defaulted Loans) over the aggregate outstanding principal amount of all Term Loans of such Defaulting Lender. “Default Period” means, with respect to any Defaulting Lender, the period commencing on the date of the applicable Funding Default or violation of Section 9.5(c), as applicable, and ending on the earliest of the following dates: (a) the date on which all Term Loan Commitments are cancelled or terminated and/or the Obligations are declared or become immediately due and payable, (b) the date on which (i) the Default Excess with respect to such Defaulting Lender shall have been reduced to zero (whether by the funding by such Defaulting Lender of any Defaulted Loans of such Defaulting Lender or by the non pro rata application of any voluntary or mandatory prepayments of the Loans in accordance with the terms of Section 2.9 or Section 2.10 or by a combination thereof), and (ii) such Defaulting Lender shall have delivered to Company and Administrative Agent a written reaffirmation of its intention to honor its obligations hereunder with respect to its Term Loan Commitments, (c) the date on which Company, Administrative Agent and Required Lenders waive all Funding Defaults of such Defaulting Lender in writing, and (d) the date on which Administrative Agent shall have waived all violations of Section 9.5(c), by such Defaulting Lender in writing. “Default Rate” means any interest payable pursuant to Section 2.6. “Defaulted Loan” has the meaning specified in Section 2.17. “Defaulting Lender” has the meaning specified in Section 2.17. “Delayed Draw Commitment Period” means the time period commencing on the Closing Date through and including the Delayed Draw Commitment Termination Date. “Delayed Draw Commitment Termination Date” means the earliest to occur of (a) Term Loan Maturity Date, (b) the date on which both the Initial Term Loan and the Initial Delayed Draw Term Loans are paid in full, and (c) the date on which the Delayed Draw Term Loan Commitments are reduced to zero. “Delayed Draw Term Loan Commitment” means the commitment of a Lender to make or otherwise fund the Initial Delayed Draw Term Loans. The amount of each Lender’s Delayed Draw Term Loan Commitment, if any, is set forth on Appendix A-2 or in the applicable Assignment Agreement, subject to any adjustment or reduction pursuant to the terms and conditions hereof. The aggregate amount of the Delayed Draw Term Loan Commitments as of the Closing Date is $435,261,000. “Delayed Draw Term Loans” means the Initial Delayed Draw Term Loans and the Incremental Term Loans.

- 9 - “Deposit Account” means a demand, time, savings, passbook or like account with a bank, savings and loan association, credit union or like organization, other than an account evidenced by a negotiable certificate of deposit. “Designated Guarantor” shall have the meaning assigned to such term in the definition of Excluded Subsidiary. “Disputes” has the meaning set forth in Section 4.23(d). “Disqualified Capital Stock” means any Capital Stock that, by its terms (or by the terms of any security or other Capital Stock into which it is convertible or for which it is exchangeable), or upon the happening of any event or condition, (a) matures or is mandatorily redeemable, pursuant to a sinking fund obligation or otherwise, (b) is redeemable at the option of the holder thereof, in whole or in part, (c) provides for the scheduled payments of dividends or distributions in cash, or (d) is convertible into or exchangeable for (i) Indebtedness or (ii) any other Capital Stock that would constitute Disqualified Capital Stock, in each case of clauses (a) through (d), prior to the date that is [**] after the Term Loan Maturity Date and other than solely for Qualified Capital Stock or as a result of a change of control or asset sale (so long as any rights of the holders thereof upon the occurrence of a change of control or asset sale event shall be subject to the prior repayment in full of the Loans and all other Obligations that are accrued and payable and the termination of the Term Loan Commitments); provided that if such Capital Stock is issued pursuant to a plan for the benefit of current or former employees, directors, independent contractors or other service providers of the Loan Parties or by any such plan to such current or former employees, directors, independent contractors or other service providers, such Capital Stock shall not constitute Disqualified Capital Stock solely because it may be required to be repurchased by a Loan Party in order to satisfy applicable statutory or regulatory obligations, including tax withholding, or as a result of such current or former employee’s, director’s, independent contractor’s or other service provider’s termination, death or disability; provided further that Disqualified Capital Stock shall exclude Permitted Equity Derivatives. “Disqualified Institution” means (a) those Persons that are competitors of the Borrower and its Subsidiaries that are operating companies, (b) those banks, financial institutions, other institutional lenders (or related funds of such institutional lenders) and other Persons separately identified in writing from time to time by the Borrower to the Administrative Agent (and to the extent so identified after the Closing Date, reasonably acceptable to the Administrative Agent), or (c) in the case of clause (a) or (b), any of their respective Affiliates that are (x) readily identifiable as Affiliates on the basis of their name or (y) identified by name by the Borrower to the Administrative Agent in writing from time to time; provided that the foregoing shall not apply retroactively to disqualify any Person that previously acquired or agreed to acquire an assignment or participation interest in the Loans, solely with respect to such previously acquired Loans or participation interests, to the extent such Person was not a Disqualified Institution at the time of the applicable assignment or participation, as the case may be, but shall apply to disqualify any such Person from taking any prospective assignments of or participation interests in any Loans; provided, further, that the list of Disqualified Institutions shall not be delivered by the Administrative Agent to any other Person, except that, upon an inquiry by any Lender to the Administrative Agent as to whether a specific potential assignee or prospective participant is a Disqualified Institution, the Administrative Agent shall be permitted to disclose to such Lender whether such specific potential assignee or prospective participant is a Disqualified Institution “Dollars” and the sign “$” mean the lawful money of the United States of America. “Domestic Subsidiary” means any Subsidiary organized under the laws of the United States of America, any State thereof or the District of Columbia.

- 10 - “Eligible Assignee” means (a) any Lender, any Affiliate of any Lender and any Related Fund (any two or more Related Funds being treated as a single Eligible Assignee for all purposes hereof), (b) any commercial bank, insurance company, investment or mutual fund or other entity that is an “accredited investor” (as defined in Regulation D under the Securities Act) and which extends credit or buys loans as one of its businesses, and (c) any other Person (other than a natural Person) approved by Administrative Agent; provided, none of (i) Borrower, (ii) any Affiliate of Borrower, (iii) any Person owning or controlling any trade debt or Indebtedness of any Loan Party (other than the Obligations) or any Capital Stock of any Loan Party (in each case, unless approved by Administrative Agent), (iv) so long as no Event of Default has occurred and is continuing, any competitor of Borrower or its Subsidiaries or (v) so long as no Event of Default has occurred and is continuing, any Disqualified Institution shall, in any event, be an Eligible Assignee without the written consent of the Borrower. “EMA” means the European Medicines Agency or any successor thereto. “Employee Benefit Plan” means any “employee benefit plan” as defined in Section 3(3) of ERISA which is or was sponsored, maintained or contributed to by, or required to be contributed by, Borrower, any of its Subsidiaries or any of their respective ERISA Affiliates. “Environmental Claim” means any complaint, summons, citation, investigation, notice, directive, notice of violation, order, claim, demand, action, litigation, judicial or administrative proceeding, judgment, letter or other communication from any Governmental Authority or any other Person, involving (a) any actual or alleged violation of any Environmental Law, (b) any Hazardous Material or any actual or alleged Hazardous Materials Activity, (c) injury to the environment, natural resource, any Person (including wrongful death) or property (real or personal) in connection with Hazardous Materials or actual or alleged violations of Environmental Laws, or (d) actual or alleged Releases or threatened Releases of Hazardous Materials either (i) on, at or migrating from any assets, properties or businesses currently or formerly owned or operated by any Loan Party or any of its Subsidiaries or any predecessor in interest, (ii) from adjoining properties or businesses, or (iii) onto any facilities which received Hazardous Materials generated by any Loan Party or any of its Subsidiaries or any predecessor in interest. “Environmental Laws” means any and all current or future foreign or domestic, federal or state (or any subdivision of either of them), statutes, ordinances, orders, rules, regulations, judgments, decrees, permits, licenses or binding determinations of any Governmental Authorizations, or any other requirements of Governmental Authorities relating to (a) the manufacture, generation, use, storage, transportation, treatment, disposal or Release of Hazardous Materials, or (b) occupational safety and health, industrial hygiene, land use or the protection of the environment, human, plant or animal health or welfare. “Environmental Liabilities and Costs” means all liabilities, monetary obligations, losses (including monies paid in settlement), damages, punitive damages, natural resources damages, consequential damages, treble damages, costs and expenses (including all reasonable fees, disbursements and expenses of counsel, experts and consultants and costs of investigations and feasibility studies), fines, penalties, sanctions and interest incurred in connection with any Remedial Action, any Environmental Claim, or any other claim or demand by any Governmental Authority or any Person that relates to any actual or alleged violation of Environmental Laws, actual or alleged exposure or threatened exposure to Hazardous Materials, or any actual or alleged Release or threatened Release of Hazardous Materials. “Environmental Lien” means any Lien in favor of any Governmental Authority for Environmental Liabilities and Costs. “ERISA” means the Employee Retirement Income Security Act of 1974.

- 11 - “ERISA Affiliate” means, as applied to any Person, (a) any corporation which is a member of a controlled group of corporations within the meaning of Section 414(b) of the Internal Revenue Code of which that Person is a member; (b) any trade or business (whether or not incorporated) which is a member of a group of trades or businesses under common control within the meaning of Section 414(c) of the Internal Revenue Code of which that Person is a member; and (c) any member of an affiliated service group within the meaning of Section 414(m) or (o) of the Internal Revenue Code of which that Person, any corporation described in clause (a) above or any trade or business described in clause (b) above is a member. Any former ERISA Affiliate of Borrower or any of its Subsidiaries shall continue to be considered an ERISA Affiliate of Borrower or any such Subsidiary within the meaning of this definition with respect to the period such entity was an ERISA Affiliate of Borrower or such Subsidiary and with respect to liabilities arising after such period for which Borrower or such Subsidiary could be liable under the Internal Revenue Code or ERISA. “ERISA Event” means (a) a “reportable event” within the meaning of Section 4043 of ERISA and the regulations issued thereunder with respect to any Pension Plan (excluding those for which the provision for thirty day notice to the PBGC has been waived by regulation), (b) the failure to meet the minimum funding standard of Section 412 of the Internal Revenue Code with respect to any Pension Plan (whether or not waived in accordance with Section 412(d) of the Internal Revenue Code) or the failure to make by its due date a required installment under Section 412(m) of the Internal Revenue Code with respect to any Pension Plan or the failure to make any required contribution to a Multiemployer Plan, (c) the provision by the administrator of any Pension Plan pursuant to Section 4041(a)(2) of ERISA of a notice of intent to terminate such plan in a distress termination described in Section 4041(c) of ERISA, (d) the withdrawal by Borrower, any of its Subsidiaries or any of their respective ERISA Affiliates from any Pension Plan with two or more contributing sponsors or the termination of any such Pension Plan resulting in liability to Borrower, any of its Subsidiaries or any of their respective Affiliates pursuant to Section 4063 or 4064 of ERISA, (e) the institution by the PBGC of proceedings to terminate any Pension Plan, or the occurrence of any event or condition which might constitute grounds under ERISA for the termination of, or the appointment of a trustee to administer, any Pension Plan, (f) the imposition of liability on Borrower, any of its Subsidiaries or any of their respective ERISA Affiliates pursuant to Section 4062(e) or 4069 of ERISA or by reason of the application of Section 4212(c) of ERISA, (g) the withdrawal of Borrower, any of its Subsidiaries or any of their respective ERISA Affiliates in a complete or partial withdrawal (within the meaning of Sections 4203 and 4205 of ERISA) from any Multiemployer Plan if there is any potential liability therefor, or the receipt by Borrower, any of its Subsidiaries or any of their respective ERISA Affiliates of notice from any Multiemployer Plan that it is in reorganization or insolvency pursuant to Section 4241 or 4245 of ERISA, or that it intends to terminate or has terminated under Section 4041A or 4042 of ERISA, (h) the occurrence of an act or omission which could give rise to the imposition on Borrower, any of its Subsidiaries or any of their respective ERISA Affiliates of fines, penalties, taxes or related charges under Chapter 43 of the Internal Revenue Code or under Section 409, Section 502(c), (i) or (l), or Section 4071 of ERISA in respect of any Employee Benefit Plan, (i) the assertion of a material claim (other than routine claims for benefits) against any Employee Benefit Plan other than a Multiemployer Plan or the assets thereof, or against Borrower, any of its Subsidiaries or any of their respective ERISA Affiliates in connection with any Employee Benefit Plan, (j) receipt from the Internal Revenue Service of notice of the failure of any Pension Plan (or any other Employee Benefit Plan intended to be qualified under Section 401(a) of the Internal Revenue Code) to qualify under Section 401(a) of the Internal Revenue Code, or the failure of any trust forming part of any Pension Plan to qualify for exemption from taxation under Section 501(a) of the Internal Revenue Code, or (k) the imposition of a Lien pursuant to Section 401(a)(29) or 412(n) of the Internal Revenue Code or pursuant to ERISA with respect to any Pension Plan. “Erroneous Distribution” has the meaning specified therefor in Section 9.12. “Event of Default” means each of the conditions or events set forth in Section 8.1.

- 12 - “Exchange Act” means the Securities Exchange Act of 1934, as amended from time to time, and any successor statute. “Excluded Account” means Deposit Accounts and/or Securities Accounts, (a) the balance of which consists exclusively of withheld income taxes and foreign, federal, state or local employment taxes in such amounts as are required to be paid to the Internal Revenue Service or any other government agencies within the following two months with respect to employees of Borrower or any of its Subsidiaries, (b) used exclusively for payroll to or for the benefit of employees of Borrower or any of its Subsidiaries in such amounts as are required to be paid to such employees within the immediately succeeding two payroll cycles, (c) which are exclusively health care reimbursement accounts or employee benefits accounts, including any accounts exclusively containing amounts required to be paid over to an employee benefit plan pursuant to DOL Reg. Sec. 2510.3-102 on behalf of or for the benefit of employees of Borrower or any of its Subsidiaries, (d) which are segregated accounts and constitute (and the balance of which consists solely of funds set aside in connection with) fiduciary accounts and trust accounts, (e) which are exclusively holding cash collateral or other deposits constituting Liens permitted by clauses (g), (o) and (ff) of Permitted Liens, (f) segregated accounts that hold cash proceeds of Royalties sold pursuant to a Permitted Royalty Transaction involving Plozasiran, (g) which are zero-balance accounts or (h) that have amounts on deposit that do not exceed $[**] individually or $[**] in the aggregate at any one time. “Excluded Assets” shall mean, with respect to any Loan Party, (a) Excluded Equity Interests and (b) “Excluded Assets” as defined in the applicable Security Agreement to which such Loan Party is a party and with respect to any Foreign Subsidiary subject to the Agreed Security Principles. “Excluded Equity Interests” means, collectively: (i) any Capital Stock in any Subsidiary with respect to which the grant to the Administrative Agent, for the benefit of Lenders and the other Secured Parties, of a security interest in and Lien upon, and the pledge to the Administrative Agent, for the benefit of Lenders and the other Secured Parties, of, such Capital Stock, to secure the Obligations (and any guaranty thereof) are validly prohibited by requirements of law; (ii) any Capital Stock in any Subsidiary with respect to which the grant to the Administrative Agent, for the benefit of Lenders and the other Secured Parties, of a security interest in and Lien upon, and the pledge to the Administrative Agent, for the benefit of Lenders and the other Secured Parties, of, such Capital Stock, to secure the Obligations (and any guaranty thereof) require the consent, approval or waiver of any Governmental Authority or other third party and such consent, approval or waiver has not been obtained by Borrower following Borrower’s commercially reasonable efforts to obtain the same; (iii) any Capital Stock in any Subsidiary that is a non-wholly-owned Subsidiary that the grant to the Administrative Agent, for the benefit of Lenders and the other Secured Parties, of a security interest in and Lien upon, and the pledge to the Administrative Agent, for the benefit of Lenders and the other Secured Parties, of, such Capital Stock, to secure the Obligations (and any guaranty thereof) are validly prohibited by, or would give any third party (other than Borrower or an Affiliate of Borrower) the right to terminate its obligations under, the operating or organizational documents or the joint venture agreement or shareholder agreement with respect to, or any other contract with such third party relating to such non-wholly-owned Subsidiary, including any contract evidencing Indebtedness of such non-wholly-owned Subsidiary (other than customary non-assignment provisions which are ineffective under Article 9 of the Code or other Requirements of Law), but only, in each case, to the extent, (x) the Borrower used commercially reasonable efforts to prevent the prohibition of the pledge such Capital Stock in any non-wholly-owned Subsidiary hereunder and (y) for so long as such operating or organizational document, joint venture agreement, shareholder agreement or other contract is in effect; (iv) any Capital Stock in any other Subsidiary with respect to which, Borrower and the Administrative Agent reasonably determine by mutual agreement that granting the Administrative Agent, for the benefit of Lenders and the other Secured Parties, a security interest in and Lien upon, and pledging to the Administrative Agent, for the benefit of Lenders and the other Secured Parties, such Capital Stock, to secure the Obligations (and any guaranty thereof) could result in material adverse tax consequences to the Borrower or its Subsidiaries; (v)

- 13 - any Capital Stock in any other Subsidiary with respect to which, Borrower and the Administrative Agent reasonably determine by mutual agreement that the cost of granting the Administrative Agent, for the benefit of Lenders and the other Secured Parties, a security interest in and Lien upon, and pledging to the Administrative Agent, for the benefit of Lenders and the other Secured Parties, such Capital Stock, to secure the Obligations (and any guaranty thereof) are excessive, relative to the value to be afforded to the Secured Parties thereby; and (vi) any other Capital Stock expressly included in the definition of “Excluded Assets.” “Excluded Perfection Action” means, collectively, (a) any filings or other action in any jurisdiction outside of the Specified Jurisdictions or required by the Laws of any jurisdiction outside of the Specified Jurisdictions to create or perfect any security interest in any assets located or titled outside of the Specified Jurisdictions, except any such filings or other actions with respect to Intellectual Property Rights registered in any jurisdiction outside the Specified Jurisdictions that Administrative Agent may reasonably request from time to time, (b) any bailee waivers, landlord waivers, estoppels or collateral access letters, in each case to the extent such waivers and letters are not capable of being obtained after the use of commercially reasonable efforts by the Borrower and its Subsidiaries, (c) any notices to be sent to account debtors or other contractual third parties (other than after the occurrence of an Event of Default), (d) any perfection action to the extent this Agreement or the Collateral Documents applicable to the relevant Loan Party expressly provides such action is not required, (e) any control agreements or arrangements with respect to any assets other than Deposit Accounts and Securities Accounts that are not Excluded Accounts and (f) delivery of any stock certificates of Persons other than Loan Parties and Material Subsidiaries. “Excluded Subsidiary” means, (a) any not-for-profit Subsidiary, (b) any captive insurance entity, (c) any merger Subsidiary formed in connection with a Permitted Acquisition so long as such merger Subsidiary is merged out of existence pursuant to such Permitted Acquisition or dissolved within [**] of its formation thereof or such later date as permitted by Administrative Agent in its reasonable discretion, (d) [reserved], (e) any Subsidiary that (i) had assets representing [**]% or less of the total assets of Company and its Subsidiaries, determined on a consolidated basis in accordance with GAAP, as of the last day of the most recent Fiscal Quarter for which financial statements have been, or were required to be, delivered pursuant to Section 3.1(f), Section 5.1(b) or (c), as applicable (the “Test Date”), (ii) contributed [**]% or less of the total revenues of Borrower and its Subsidiaries, for the Fiscal Quarter ended on the Test Date, and (iii) had, as of the applicable Test Date, Cash and Cash Equivalents representing [**]% or less of the total Cash and Cash Equivalents of Company and its Subsidiaries, for the Fiscal Quarter ended on the Test Date; provided, if at any time and from time to time after the Closing Date, Subsidiaries that are not Loan Parties comprise in the aggregate more than [**]% of the total assets of Company and its Subsidiaries as of the Test Date, contribute more than [**]% of the total revenues of Company and its Subsidiaries for the Fiscal Quarter ended on the Test Date, and hold, as of the applicable Test Date, more than [**]% of the total Cash and Cash Equivalents of Company and its Subsidiaries for the Fiscal Quarter ended on the Test Date, then Borrower shall, not later than [**] after the date by which financial statements for such period are required to be delivered (or such longer period as the Administrative Agent may agree in its reasonable discretion), designate in writing to Administrative Agent that one or more of such Subsidiaries is no longer an Excluded Subsidiary for purposes of this Agreement to the extent required such that the foregoing condition ceases to be true, (f) [reserved], or (g) any Subsidiary that is prohibited or restricted by any Requirement of Law or by contractual obligations existing on the Closing Date (or, in the case of any newly acquired Subsidiary, in existence at the time of acquisition but not entered into in contemplation thereof (unless in connection with a Joint Venture otherwise permitted hereunder) or for the purpose of avoiding a guarantee of the Obligations) from guaranteeing the Obligations or if guaranteeing the Obligations would require governmental (including regulatory) consent, approval, license or authorization, unless such consent, approval, license or authorization has been obtained or Visirna and any of its Subsidiaries. The Excluded Subsidiaries on the Closing Date are set forth on Schedule 1.1(b).

- 14 - Notwithstanding anything to the contrary, the Borrower may, in its reasonable discretion, designate any Subsidiary that otherwise qualifies as an “Excluded Subsidiary” pursuant to any one or more of clauses (a) through (g) above as not being an Excluded Subsidiary by written notice to the Administrative Agent (any such subsidiary as an Excluded Subsidiary, a “Designated Guarantor”) and, following such designation, may re-designate such Subsidiary as an Excluded Subsidiary with the consent of the Administrative Agent. “Excluded Taxes” has the meaning specified in Section 2.15(a). “Extraordinary Receipts” means any cash received by Borrower or any of its Subsidiaries not in the ordinary course of business (and not consisting of proceeds of transactions described in Section 2.10(b), (c), (e), (f), (g), (h), (i) and (j) hereof), including, without limitation, (a) tax refunds, (b) pension plan reversions, (c) judgments, proceeds of settlements or other consideration of any kind in connection with any cause of action (including but not limited to infringement actions and breach of contract claims for the enforcement of Intellectual Property Rights), (d) condemnation awards (and payments in lieu thereof), (e) indemnity payments (excluding reimbursements for out-of-pocket costs and expenses actually incurred and paid to non-Affiliates of the Borrower or any of its Subsidiaries), and (f) any purchase price adjustment received in connection with any purchase agreement. “Fair Share” has the meaning specified in Section 7.2. “FASB ASC” means the Accounting Standards Codification of the Financial Accounting Standards Board. “FATCA” means Sections 1471 through 1474 of the Internal Revenue Code, in effect as of the date of this Agreement (or any amended or successor version that is substantively comparable and not materially more onerous to comply with), any current or future regulations or official interpretations thereof and any agreements entered into pursuant to Section 1471(b)(1) of the Internal Revenue Code, and any fiscal or regulatory legislation, rules, or practices adopted pursuant to any intergovernmental agreement, treaty, or convention among Governmental Authorities and implementing such Sections of the Internal Revenue Code. “Fazirsiran” means the pharmaceutical product candidate having the chemical structure set forth on Schedule 1.1(a), including all forms, presentations, strengths, doses, and formulations (including any method of delivery), either alone or as a Combination Product, and all other “Products” (as defined in the Fazirsiran License Agreement) licensed or sublicensed to one or more third parties under the Fazirsiran License Agreement. “Fazirsiran License Agreement” means that certain Exclusive License and Co-Funding Agreement, by and between Takeda Pharmaceuticals U.S.A., Inc. and Arrowhead Pharmaceuticals Inc. dated as of October 7, 2020, as amended by that certain First Amendment entered into as of March 15, 2022 but effective retroactively as of October 7, 2020. “Fazirsiran Payments” means [**]. “Fazirsiran Payment Adjustment” has the meaning set forth in Section 2.10(e). “Fazirsiran Payment Shortfall Amount” has the meaning set forth in Section 2.10(e). “FDA” means the U.S. Food and Drug Administration or any successor thereto.

- 15 - “FDA Laws” means the Federal Food, Drug, and Cosmetic Act (21 U.S.C. § 301 et seq.) and all applicable statutes, rules, regulations, and orders and Requirements of Law administered, implemented, enforced or issued thereunder by FDA, or any applicable statutes, rules, regulations, and orders and Requirements of Law administered, implemented, enforced or issued by any comparable Governmental Authority. “Federal Health Care Program Laws” means collectively, federal Medicare or federal or state Medicaid statutes, Sections 1128, 1128A, 1128B, 1128C or 1877 of the Social Security Act (42 U.S.C. §§ 1320a-7, 1320a-7a, 1320a-7b, 1320a-7c, 1320a-7h and 1395nn), the federal TRICARE statute (10 U.S.C. § 1071 et seq.), the civil False Claims Act of 1863 (31 U.S.C. § 3729 et seq.), criminal false claims statutes (e.g., 18 U.S.C. §§ 287 and 1001), the Program Fraud Civil Remedies Act of 1986 (31 U.S.C. § 3801 et seq.), and related regulations or other Requirements of Law that directly or indirectly govern the health care industry, programs of Governmental Authorities related to healthcare, health care professionals or other health care participants, or relationships among health care providers, suppliers, distributors, manufacturers and patients, and the pricing, sale and reimbursement of health care items or services including the collection and reporting requirements, and the processing of any applicable rebate, chargeback or adjustment, under applicable rules and regulations relating to the Medicaid Drug Rebate Program (42 U.S.C. § 1396r-8) and any state supplemental rebate program, Medicare average sales price reporting (42 U.S.C. § 1395w-3a), the Public Health Service Act (42 U.S.C. § 256b), the VA Federal Supply Schedule (38 U.S.C. § 8126) or under any state pharmaceutical assistance program or U.S. Department of Veterans Affairs agreement, and any successor government programs. “Federal Health Care Programs” shall mean the Medicare, Medicaid and TRICARE programs and any other state or federal health care program, as defined in 42 U.S.C. § 1320a-7b(f). “Fee Letter” means the letter agreement, dated the Closing Date, between Company and Administrative Agent, as amended, amended and restated, supplemented or otherwise modified from time to time. “Financial Officer Certification” means, with respect to the financial statements for which such certification is required, the certification of the chief financial officer of Borrower that such financial statements fairly present, in all material respects, the financial condition of Borrower and its Subsidiaries as at the dates indicated and the results of their operations and their cash flows for the periods indicated, subject to changes resulting from audit and normal year-end adjustments. “First Commercial Sale” means, with respect to a Product and a country, the first sale for monetary value to a third party by the Borrower or its Subsidiaries for use or consumption by the end user of such Product in such country after regulatory approval for such Product has been obtained in such country. Sales prior to receipt of regulatory approval for such Product, such as so-called “treatment IND sales,” “named patient sales,” and “compassionate use sales,” shall not be construed as a First Commercial Sale. “Fiscal Quarter” means a fiscal quarter of any Fiscal Year. “Fiscal Year” means the fiscal year of Borrower and its Subsidiaries ending on September 30 of each calendar year. “Flow of Funds Agreement” means that certain Flow of Funds Agreement, dated as of the Closing Date, duly executed by Company, Administrative Agent, and any other person party thereto, in form and substance reasonably satisfactory to Administrative Agent. “Foreign Legal Reservations” shall mean:

- 16 - (a) the principle that equitable remedies are remedies which may be granted or refused at the discretion of the court and principles of good faith and fair dealing; (b) the application of bankruptcy, insolvency, liquidation, reorganization, court schemes, moratorium, administration, receivership, examinership or other similar laws affecting creditors’ rights generally and subject to general principles of equity, regardless of whether considered in a proceeding in equity or at law; (c) the existence of timing limitations with respect to the bringing of claims under applicable limitation laws and the defenses of acquiescence, set-off or counterclaim and the possibility that an undertaking to assume liability for, or to indemnify a Person against, non-payment of stamp duty may be void; (d) the principle that in certain jurisdictions and under certain circumstances a Lien granted by way of fixed charge may be re-characterized as a floating charge or that security purported to be constituted as an assignment may be re-characterized as a charge; (e) the principle that additional interest imposed pursuant to any relevant agreement may be held to be unenforceable on the grounds that it is a penalty and thus void; (f) the principle that a court may not give effect to an indemnity for legal costs incurred by an unsuccessful litigant; (g) [reserved]; (h) the principle that a court may not give effect to any parallel debt provisions, covenants to pay or other similar provisions; (i) the principle that certain remedies in relation to regulated entities may require further approval from government or regulatory bodies or pursuant to agreements with such bodies; and (j) the principles of private and procedural laws which affect the enforcement of a foreign court judgment. “Foreign Lender” means (a) if Borrower is a U.S. Person, a Lender that is not a U.S. Person, and (b) if Borrower is not a U.S. Person, a Lender that is resident or organized under the laws of a jurisdiction other than that in which Borrower is resident for tax purposes. “Foreign Official” means any officer or employee of a non-U.S. government or any department, agency, or instrumentality thereof, or of a public international organization, or any person acting in an official capacity for or on behalf of any such government or department, agency, or instrumentality, or for or on behalf of any such public international organization. “Foreign Sovereign Immunities Act” means the US Foreign Sovereign Immunities Act of 1976 (28 U.S.C. Sections 1602-1611), as amended. “Foreign Subsidiary” means any Subsidiary that is not a Domestic Subsidiary. “FTC” means the U.S. Federal Trade Commission or any successor thereto. “Funding Default” has the meaning specified in Section 2.17.

- 17 - “Funding Notice” means a written notice substantially in the form of Exhibit A. “GAAP” means, subject to the limitations on the application thereof set forth in Section 1.2, United States generally accepted accounting principles in effect as of the date of determination thereof. “Global Net Sales” means, with respect to any Product for any period (except with respect to any such Product that is the subject of a Product Agreement, in which case, the equivalent definition to this “Global Net Sales” definition included in such Product Agreement to the extent applicable to such revenues shall control), (a) the consolidated worldwide gross revenues generated by (a) the sale of such Product by the Borrower, its Affiliates, or Licensees, throughout the world during such period, less, without duplication, (i) customary trade, quantity and cash discounts allowed in the ordinary course, (ii) amounts repaid or credited due to refunds, credits, rebates, charge backs, retroactive price adjustments and any other similar allowances which effectively reduce the selling price, (iii) amounts repaid or credited due to product returns, (iv) an allowance for transportation, distribution, packaging, freight, postage, shipping and insurance expenses or other distribution expenses, to the extent not reimbursed by the purchaser of the Product, not to exceed [**] of gross invoiced sales, (v) rebates and similar payments made with respect to sales paid for by any governmental or regulatory authority such as, by way of non-limiting illustration, Federal or state Medicaid, Medicare or similar state program or equivalent foreign governmental program, (vi) the portion of administrative fees paid during the relevant time period to group purchasing organizations or pharmaceutical benefit managers relating to such Product, (vii) customs and excise duties and other non- recoverable taxes or duties levied or imposed on such revenues (excluding income or net profit taxes or franchise taxes of any kind), to the extent not reimbursed by the purchaser of the Product, (viii) that portion of the annual fee on prescription drug manufacturers imposed by the Patient Protection and Affordable Care Act, Pub. L. No. 111-148 (as amended) that is allocated to such sales (ix) [reserved], and (x) credit card charges (including processing fees) accrued on such sales of Product and not already taken as a gross-to- net deduction in accordance with GAAP in the calculation of sales of Product (collectively, the “Permitted Deductions”), and (b) any additional consideration received by the Borrower, or any of its Subsidiaries in connection with the sale of such Product by the Borrower, its Subsidiaries, or Licensees to third parties (including any transfer price received from distributors with respect to such Product), all, in respect of clauses (a) and (b), as determined in accordance with GAAP (or applicable international accounting standards) and calculated on a basis consistent with the applicable financial statements of the Borrower, its Affiliates, or Licensees. For purposes of determining Global Net Sales of Products, a “sale” shall not include transfers or dispositions of such Product for pre-clinical or clinical purposes or as samples or for charitable, promotional, manufacturing, testing, qualification or regulatory purposes, in each case, to the extent at or below the Borrower’s, its Affiliates’, or Licensees’ cost of goods therefor. Global Net Sales shall not include sales or transfers between or among the Borrower, its Affiliates, or its or their or Licensees for subsequent resale by such selling entity. Except with respect to any Product that is a Combination Product under its applicable Product Agreement, in which case, the definition of such Combination Product (or the provisions of such Product Agreement specifying the calculation of net sales with respect to a Combination Product) included in such Product Agreement shall control, if any Product is sold as a Combination Product in any country, then Global Net Sales for such Combination Product will be calculated by the following (such process, the “Combination Product Calculation”): (1) multiplying the actual Global Net Sales of such Combination Product in such country by the fraction A/(A+B), where A is the weighted (by sales volume) average gross sales price in such country of the Product if sold separately in such country, and B is the weighted average gross sales price in such country of the ready for sale form of the other therapeutically active ingredient(s) in the Combination Product that are not a Product (the “Other Components”), if sold separately in such country; (2) if, on a country-by-country basis, the Other Components are not sold separately in a country, Global Net Sales in such country for the purpose of determining royalty payments on Global Net Sales of the Combination Product shall be calculated by multiplying actual Global Net Sales of such Combination

- 18 - Product in such country by the fraction A/C where A is the weighted average gross sales price in such country of the Product, if sold separately in such country, and C is the weighted average gross sales price of the Combination Product in such country; (3) if, on a country-by-country basis, a Product is not sold separately, Global Net Sales in such country for the purpose of determining royalty payments on Global Net Sales of the Combination Product shall be calculated by multiplying the actual Global Net Sales of such Combination Product by the fraction (C-B)/C, where B is the weighted average gross sales price in such country of the Other Components, if sold separately in such country, and C is the weighted average gross sales price in such country of the Combination Product; or (4) if, on a country-by-country basis, neither a Product nor the Other Components are sold separately in such country, Global Net Sales of the Combination Product in such country for the purposes of determining royalty payments on such Global Net Sales of such Combination Product shall be determined by the Borrower based on the relative fair market value of such Product and Other Components, taking into account the medical contribution to the Other Components, and all other factors reasonably relevant to the relative value of, the Product, on the one hand, and all of the Other Components as applicable, collectively, on the other hand. “Governmental Authority” means any federal, state, municipal, national or other government, governmental department, commission, board, bureau, court, agency or instrumentality or political subdivision thereof or any entity or officer exercising executive, legislative, judicial, taxing, regulatory or administrative functions of or pertaining to any government or any court, including any patent office, in each case whether associated with a state of the United States, the United States or a foreign entity or government. “Governmental Authorization” means any permit, license, authorization, clearance, approval, Registration, plan, directive, administrative order, consent order or consent decree of or from any Governmental Authority. “Grantor” has the meaning specified in the Pledge and Security Agreement. “GSK4532990” means the pharmaceutical product candidate having the chemical structure set forth on Schedule 1.1(a), including all forms (including salt forms), presentations, strengths, doses, and formulations (including any method of delivery), either alone or as a Combination Product, and all other “Products” (as defined in the GSK4532990 License Agreement) licensed or sublicensed to one or more third parties under the GSK4532990 License Agreement. “GSK4532990 License Agreement” means that certain Exclusive License Agreement by and between Arrowhead Pharmaceuticals, Inc. and GlaxoSmithKline Intellectual Property (No. 3) Limited dated as of November 22, 2021. “Guaranteed Obligations” has the meaning specified in Section 7.1. “Guarantor” means each Subsidiary of Borrower and each other Person which guarantees, pursuant to Article VII or otherwise, all or any part of the Obligations. For the avoidance of doubt, no Excluded Subsidiary shall be a Guarantor except at the election of Borrower in accordance with Section 5.10. “Guarantor Subsidiary” means each Guarantor. “Guaranty” means (a) the guaranty of each Guarantor set forth in Article VII and (b) each other guaranty, in form and substance satisfactory to Administrative Agent, made by any other Guarantor for the benefit of the Secured Parties guaranteeing all or part of the Obligations.

- 19 - “Hazardous Materials” means, regardless of amount or quantity, (a) any element, compound or chemical that is defined, listed or otherwise classified as a contaminant, pollutant, toxic pollutant, toxic or hazardous substance, extremely hazardous substance or chemical, hazardous waste, special waste, or solid waste under Environmental Laws or that is likely to cause immediately, or at some future time, harm to or have an adverse effect on, the environment or risk to human health or safety, including, without limitation, any pollutant, contaminant, waste, hazardous waste, toxic substance or dangerous good which is defined or identified in any Environmental Law and which is present in the environment in such quantity or state that it contravenes any Environmental Law, (b) petroleum and its refined products, (c) polychlorinated biphenyls, (d) any substance exhibiting a hazardous waste characteristic, including, without limitation, corrosivity, ignitability, toxicity or reactivity as well as any radioactive or explosive materials, (e) any raw materials, building components (including, without limitation, asbestos-containing materials) and manufactured products containing hazardous substances listed or classified as such under Environmental Laws, and (f) any substance or materials that are otherwise regulated under Environmental Law. “Hazardous Materials Activity” means any past, current, proposed or threatened activity, event or occurrence involving any Hazardous Materials, including the use, manufacture, possession, storage, holding, presence, existence, location, Release, threatened Release, discharge, placement, generation, transportation, processing, construction, treatment, abatement, removal, remediation, disposal, disposition or handling of any Hazardous Materials, and any corrective action or response action with respect to any of the foregoing. “Hedging Agreement” means any interest or foreign exchange rate swap agreement, interest rate or foreign exchange cap agreement, interest rate or foreign exchange collar agreement, interest rate or foreign exchange hedging agreement or other similar agreement or arrangement, each of which is (a) for the purpose of hedging the interest rate exposure or foreign exchange exposure associated with Borrower’s and its Subsidiaries’ operations, and (b) not for speculative purposes. “Highest Lawful Rate” means the maximum lawful interest rate, if any, that at any time or from time to time may be contracted for, charged, or received under the laws applicable to any Lender which are presently in effect or, to the extent allowed by law, under such applicable laws which may hereafter be in effect and which allow a higher maximum non-usurious interest rate than applicable laws now allow. “Historical Financial Statements” means as of the Closing Date, (a) the audited financial statements of Borrower and its Subsidiaries, for the Fiscal Year ended September 30, 2023, consisting of balance sheets and the related consolidated statements of income, stockholders’ equity and cash flows for such Fiscal Year, and (b) the financial statements of Borrower and its Subsidiaries for the Fiscal Quarter ended March 31, 2024, consisting of balance sheets and the related consolidated statements of income, stockholders’ equity and cash flows for such Fiscal Quarter. “Immaterial Subsidiary” means a Subsidiary of the Borrower described in clause (e) of the definition of Excluded Subsidiary. “Increased Cost Lenders” has the meaning specified in Section 2.18. “Incremental Term Loans” means the Term Loans funded after the Closing Date pursuant to Section 2.1(a)(iii). “Indebtedness” means, as applied to any Person, without duplication, (a) all indebtedness for borrowed money, (b) that portion of obligations with respect to Capital Leases that is properly classified as a liability on a balance sheet in conformity with GAAP, (c) all obligations of such Person evidenced by notes, bonds or similar instruments or upon which interest payments are customarily paid and all obligations

- 21 - expenses and disbursements of any kind or nature whatsoever (including the reasonable and documented out-of-pocket fees and disbursements of counsel for Indemnitees in connection with any investigative, administrative or judicial proceeding commenced or threatened by any Person, whether or not any such Indemnitee shall be designated as a party or a potential party thereto, and any fees or expenses incurred by Indemnitees in enforcing this indemnity), whether direct, indirect or consequential and whether based on any federal, state or foreign laws, statutes, rules or regulations (including securities and commercial laws, statutes, rules or regulations and Environmental Laws), on common law or equitable cause or on contract or otherwise, that may be imposed on, incurred by, or asserted in writing against any such Indemnitee, in any manner relating to or arising out of (a) this Agreement or the other Loan Documents or the transactions contemplated hereby or thereby (including the Lenders’ agreement to make Credit Extensions or the use or intended use of the proceeds thereof, or any enforcement of any of the Loan Documents (including any sale of, collection from, or other realization upon any of the Collateral or the enforcement of the Guaranty)), (b) the statements contained in the proposal letter delivered by any Lender to Company prior to the Closing Date with respect to the transactions contemplated by this Agreement, or (c) any Environmental Claim or any Hazardous Materials Activity relating to or arising from, directly or indirectly, any past or present activity, operation, land ownership, or practice of Borrower or any of its Subsidiaries. “Indemnified Taxes” means (a) Taxes, other than Excluded Taxes, imposed on or with respect to any payment made by or on account of any obligation of any Loan Party under any Loan Document and (b) to the extent not otherwise described in clause (a), Other Taxes. “Indemnitee” has the meaning specified in Section 10.3. “Indemnitee Agent Party” has the meaning specified in Section 9.6. “Initial Delayed Draw Term Loan” means the Term Loans funded after the Closing Date pursuant to Section 2.1(a)(ii). “Initial Term Loan” means the Term Loan funded on the Closing Date pursuant to Section 2.1(a)(i). “Initial Term Loan Commitment” means the commitment of a Lender to make or otherwise fund the Initial Term Loan and “Initial Term Loan Commitments” means such commitments of all such Lenders in the aggregate. The amount of each Lender’s Initial Term Loan Commitment is set forth on Appendix A- 1 or in the applicable Assignment Agreement, subject to any adjustment or reduction pursuant to the terms and conditions hereof. The aggregate amount of the Initial Term Loan Commitment as of the Closing Date is $400,000,000. “Insolvency Proceeding” means any proceeding commenced by or against any Person under any provision of any Debtor Relief Law. “Intellectual Property” has the meaning specified in the Pledge and Security Agreement. “Intellectual Property Rights” means any and all rights, title and interests in and to all intellectual property rights of every kind and nature however denominated, as they exist throughout the world, including (a) any Patent; (b) trademarks, trade names, service marks, brands, trade dress and logos, packaging design, slogans, domain names and the goodwill and activities associated therewith (collectively, “Trademarks”);

- 22 - (c) copyrights, mask work rights, confidential information, trade secrets, database rights, including all compilations, databases and computer programs, manuals and other documentation, and all derivatives, translations, adaptations, and combinations of the above (collectively, “Copyrights”); (d) Know-How; (e) rights of publicity, and moral rights; and (f) any and all other intellectual property rights or proprietary rights, whether or not patentable, including any and all registrations, applications, recordings, licenses, common-law rights, statutory rights, administrative rights, and contractual rights relating to any of the foregoing, claims of infringement and misappropriation against third parties, and regulatory filings, submissions and approvals. “Intercompany Subordination Agreement” means that certain Intercompany Subordination Agreement, dated as of the Closing Date, made by the Loan Parties and their Subsidiaries in favor of Administrative Agent for the benefit of the Secured Parties in form and substance reasonably satisfactory to Administrative Agent, as amended, amended and restated, supplemented or otherwise modified from time to time. “Interest Payment Date” means (a) the last Business Day of each Fiscal Quarter, commencing on the first such date to occur after the Closing Date and (b) the final maturity date of the Loans (whether by scheduled maturity, acceleration or otherwise). “Internal Revenue Code” means the United States Internal Revenue Code of 1986, as amended. “Investment” means (a) any direct or indirect purchase or other acquisition by Borrower or any of its Subsidiaries of, or of a beneficial interest in, any of the securities or Capital Stock or all or substantially all of the assets of any other Person (or of any product, division, product line or business line of such other Person), (b) any direct or indirect redemption, retirement, purchase or other acquisition for value, by any Subsidiary of Borrower from any Person, of any Capital Stock of such Person, (c) any direct or indirect loan, advance, or capital contributions (or transfer or similar payment made from one entity to its Subsidiary in lieu of any capital contributions that would otherwise be required) by Borrower or any of its Subsidiaries to any other Person, including all indebtedness (including, without limitation, any intercompany indebtedness) and accounts receivable from that other Person that are not current assets or did not arise from sales to that other Person in the ordinary course of business, and (d) any direct or indirect guarantee of any obligations of any other Person. The amount of any Investment shall be (i) the original cost of such Investment plus the cost of all additions thereto, without any adjustments for increases or decreases in value, or write ups, write downs or write offs with respect to such Investment; minus (ii) the amount of dividends or distributions actually received in connection with such Investment and any return of capital and any payment of principal received in respect of such Investment that in each case is received in cash or Cash Equivalents (not in excess of the amount of Investments originally made). “Joint Venture” means a joint venture, partnership or other similar arrangement, whether in corporate, partnership or other legal form in which the Borrower or any of its Subsidiaries holds any Capital Stock; provided, in no event shall any corporate Subsidiary of any Person be considered to be a Joint Venture to which such Person is a party. On the Closing Date, the only Joint Venture is Visirna. “Joint Venture Proceeds” means any and all proceeds payable to Borrower or any of its Subsidiaries pursuant to a Joint Venture, including but not limited to dividends, whether paid in cash, equity or any other form of consideration; provided, that, any amounts payable in respect of the research, development,

- 23 - manufacture and/or Commercialization of any Partnered Asset shall be treated as Royalties, Milestones, or Profit Share Amounts (as the case may be) in respect of such Partnered Asset. “Junior Debt” has the meaning assigned to such term in the definition of Restricted Junior Payment. “Know-How” means all information and materials, including but not limited to discoveries, improvements, processes, methods, protocols, formulations formulas, data (including pharmacological, toxicological, non-clinical data, clinical data, analytical and quality control data, manufacturing data and descriptions, market data, financial data or descriptions), inventions, devices, assays, chemical formulations, specifications, product samples and other samples, physical, practices, procedures, technology, techniques, designs, drawings, correspondence, computer programs, documents, apparatus, results, strategies, Regulatory Documentation, information and submissions pertaining to, or made in association with, filings with any Governmental Authority, research in progress, algorithms, data, databases, data collections, chemical and biological materials (including any compounds, DNA, RNA, clones, vectors, cells and any expression product, progeny, derivatives or improvements thereto), and the results of experimentation and testing, including samples in each case, knowledge, know-how, trade secrets and the like, in written, electronic, oral or other tangible or intangible form, patentable or otherwise, which are not generally known. “Lender” means each lender listed on the signature pages hereto as a Lender, and any other Person that becomes a party hereto pursuant to an Assignment Agreement other than any Person that ceases to be a party hereto pursuant to any Assignment Agreement. “Liabilities” means all claims, actions, suits, judgments, damages, losses, liability, obligations, responsibilities, fines, penalties, sanctions, costs, fees, taxes, commissions, charges, disbursements and expenses, in each case of any kind or nature (including interest accrued thereon or as a result thereto and fees, charges and disbursements of financial, legal and other advisors and consultants), whether joint or several, whether or not indirect, contingent, consequential, actual, punitive, treble or otherwise. “License Agreements” has the meaning set forth in Section 4.23(b). “Licensee” means any third party to which Company, any of its Subsidiaries, or any of their respective licensees, directly or indirectly through multiple tiers, grants a license, a sublicense, or other right to develop, manufacture or Commercialize a Product in any jurisdiction. “Lien” means (a) any lien, mortgage, pledge, assignment, hypothec, deed of trust, security interest, license or sublicense, charge or encumbrance of any kind (including any agreement to give any of the foregoing, any conditional sale or other title retention agreement, and any lease in the nature thereof) and any option, trust or other preferential arrangement having the practical effect of any of the foregoing, and (b) in the case of securities or Capital Stock, any purchase option, call or similar right of a third party with respect to such securities or Capital Stock. “Loan” means any Term Loan. “Loan Account” means an account maintained hereunder by Administrative Agent on its books of account at the Payment Office, and with respect to Company, in which it will be charged with the Term Loan made to, and all other Obligations incurred by the Loan Parties. “Loan Document” means any of this Agreement, the Notes, if any, the Collateral Documents, the Fee Letter, the Flow of Funds Agreement, any Guaranty, the Intercompany Subordination Agreement, the Perfection Certificate, any intercreditor agreement executed pursuant to Section 9.8(a)(ii)(A), and all other

- 24 - documents, instruments or agreements executed and delivered by a Loan Party for the benefit of Administrative Agent or any Lender in connection herewith. “Loan Party” means Company or any Guarantor. “Loan Party Partner” has the meaning set forth in Section 4.33(a). “Margin Stock” has the meaning specified in Regulation U of the Board of Governors of the Federal Reserve System as in effect from time to time. “Market Capitalization Milestone” means the Company achieves an aggregate market capitalization of the Company (based on the closing price of the Common Stock on the date of such calculation) of greater than (i) $[**] for the purposes of the definition of Permitted Acquisition and Section 2.10(f) of this Agreement and (ii) $[**] for purposes of the definition of Required Milestone Cash Amount. “Material Adverse Effect” means a material adverse effect with respect to (a) the business operations, properties, assets, financial condition, or liabilities of Borrower and its Subsidiaries taken as a whole, (b) the ability of any Loan Party to fully and timely perform its obligations under any Loan Document to which it is a party, (c) the legality, validity, binding effect, or enforceability against a Loan Party of a Loan Document to which it is a party, (d) the validity, perfection or priority of Administrative Agent’s Liens on the Collateral or (e) the rights, remedies and benefits available to, or conferred upon, Administrative Agent and any Lender or any other Secured Party under any Loan Document. “Material Contract” means (a) any contract or other arrangement to which Borrower or any of its Subsidiaries is a party (other than the Loan Documents) for which breach, non-performance, cancellation or failure to renew could reasonably be expected to have a Material Adverse Effect and (b) those contracts and arrangements listed on Schedule 4.15 with respect to Material Products. “Material Product” means [**]. “Material Real Property” means (i) the fee-owned real property that is located at the Verona Technology Park at 0000 Xxxxxxxxx Xxx, Xxxxxx, Xxxxxxxxx 00000 (the “Wisconsin Facility”) and (ii) any other fee-owned real property that is owned by any Loan Party with a fair market value in excess of $[**] (at the time of acquisition, as reasonably estimated by the Borrower in good faith). “Material Regulatory Liabilities” means (a) any Liabilities arising from the violation of FDA Laws, Public Health Laws, Federal Health Care Program Laws, or other applicable comparable Requirements of Law, or the terms, conditions of or requirements applicable to any Registrations (including costs of actions required under applicable Requirements of Law, including FDA Laws and Federal Health Care Program Laws, or necessary to remedy any violation of any terms or conditions applicable to any Registrations), including, but not limited to, withdrawal of approval, revocation, or suspension of a Governmental Authorization for, or recall, import detention, or seizure of, any Product, and (b) any loss of recurring annual revenues as a result of any loss, suspension or limitation of any Registrations, which, in the case of the foregoing clauses (a) and (b), (i) exceeds $[**] individually or in the aggregate or (ii) would reasonably be expected to result in a Material Adverse Effect. “Material Subsidiary” means a Subsidiary of the Borrower other than an Immaterial Subsidiary. “Milestones” means, with respect to any Product and Platform Technology, (i) any and all milestone payments received by or on behalf of Borrower or any of its Subsidiaries under any Permitted

- 25 - Product Agreement or pursuant to any Royalty Monetization Transaction in respect of such Product or Platform Technology (including but not limited to research milestones, development milestones, commercialization milestones, milestones payable on the First Commercial Sale of a Product, and purchase price milestones (including the RPI Milestones)), (ii) any and all payments received by or on behalf of Borrower or any of its Subsidiaries in lieu of such payments described in the foregoing clause (i), (iii) any and all interest payments received by Borrower or any of its Subsidiaries assessed on any payments described in the foregoing clauses (i) and (ii), and (iv) without duplication of any payment actually made under clauses (i), (ii) and (iii), any and all “proceeds” recoverable or recovered with respect to any of the foregoing. “MOIC” has the meaning specified in the Fee Letter. “Monetized Territory” has the meaning set forth in the definition of “Pipeline Asset Monetization”. “Xxxxx’x” means Xxxxx’x Investor Services, Inc. “Mortgage” means a mortgage, deed of trust or deed to secure debt that encumbers Real Property, in form and substance satisfactory to Administrative Agent, made by a Loan Party in favor of Administrative Agent for the benefit of the Secured Parties, securing the Obligations and delivered to Administrative Agent. “Mortgage Deliverables” has the meaning specified in Section 5.11. “Multiemployer Plan” means any Employee Benefit Plan which is a “multiemployer plan” as defined in Section 3(37) of ERISA. “Narrative Reports” means, with respect to the financial statements for which such narrative report is required, (a) a customary management discussion and analysis report in a customary form for the Borrower for the applicable fiscal quarter or fiscal year and for the period from the beginning of the then- current fiscal year to the end of the period to which the relevant financial statements relate and (b) a narrative report, in a form to be mutually agreed by Xxxxxxxx and Administrative Agent and which is intended to provide the following information (i) Company’s material clinical development activities involving any Products (other than Partnered Assets), including the timing/enrollment, material changes to design and latest estimate for completion for such clinical development programs, (ii) any Products (other than Partnered Assets) Commercialized by the Company, monthly units, ASP and net sales by country, and (iii) any reports summarizing development or commercialization activities received by the Borrower or any of its Subsidiaries in connection with any Joint Ventures or from Licensees with respect to their respective Partnered Assets. “Net Proceeds” means (a) with respect to any Asset Sale, an amount equal to: (i) Cash payments received by or on behalf of Borrower or any of its Subsidiaries from such Asset Sale (including, in the case of any Permitted Product Agreement, any up-front payments, Royalties, Milestones, Joint Venture Proceeds, Profit Share Amounts and other similar payments), minus (ii) any bona fide costs or expenses incurred in connection with such Asset Sale that are properly attributable to such Asset Sale and to the extent paid or payable to non-Affiliates, including (A) income or gains Taxes paid or reasonably estimated to be payable in connection therewith, (B) payment of the outstanding principal amount of, premium or penalty, if any, and interest on any Indebtedness (other than the Loans) that is secured by a Lien on the stock or assets in question and that is required to be repaid under the terms thereof as a result of such Asset Sale, (C) a reasonable reserve for any indemnification payments (fixed or contingent) attributable to seller’s indemnities and representations and warranties to purchaser in respect of such Asset Sale undertaken by Borrower or any of its Subsidiaries in connection with such Asset Sale and (D) any reasonable and

- 26 - documented out-of-pocket fees or expenses incurred in connection therewith; provided that upon release of any such reserve, the amount released shall be considered Net Proceeds, provided further that any Asset Sale comprising a Permitted Product Agreement shall not be subject to the deductions set forth in this subsection (ii), and (b) with respect to any insurance, condemnation, taking or other casualty proceeds, an amount equal to: (i) any Cash payments or proceeds received by Borrower or any of its Subsidiaries (A) under any casualty, business interruption or “key man” insurance policies in respect of any covered loss thereunder, or (B) as a result of the condemnation or taking of any assets of Borrower or any of its Subsidiaries by any Person pursuant to the power of eminent domain, condemnation or otherwise, or pursuant to a sale of any such assets to a purchaser with such power under threat of such a taking, minus (ii) (A) any actual costs or expenses incurred by Borrower or any of its Subsidiaries in connection with the adjustment or settlement of any claims of Borrower or such Subsidiary in respect thereof, and (B) any bona fide costs and expenses incurred in connection with any sale of such assets as referred to in clause (b)(i)(B) of this definition to the extent paid or payable to non-Affiliates, including income taxes payable as a result of any gain recognized in connection therewith. “New License Agreement” has the meaning set forth in Section 5.12(c). “NIH” has the meaning specified in the definition of Public Health Laws. “Non-Core Markets” means any country or jurisdiction that is not a Core Market. “Note” means a promissory note evidencing the Initial Term Loan or a Delayed Draw Term Loan, as applicable. “Notice” means a Funding Notice. “Obligations” means all obligations of every nature of each Loan Party and its Subsidiaries from time to time owed to Administrative Agent (including former Administrative Agents), the Lenders or any of them, in each case, under any Loan Document, whether for principal, interest (including interest which, but for the filing of a petition in bankruptcy with respect to such Loan Party, would have accrued on any Obligation, whether or not a claim is allowed against such Loan Party for such interest in the related bankruptcy proceeding), any Yield Maintenance Premium, any MOIC, fees, expenses, indemnification or otherwise and whether primary, secondary, direct, indirect, contingent, fixed or otherwise (including obligations of performance). “OFAC” has the meaning specified in the definition of “Anti-Terrorism Laws”. “OFAC Sanctions Programs” means (a) the Requirements of Law and Executive Orders administered by OFAC, including but not limited to, Executive Order No. 13224, and (b) the list of Specially Designated Nationals and Blocked Persons administered by OFAC, in each case, as renewed, extended, amended, or replaced. “Olpasiran” means the pharmaceutical product candidate having the chemical structure set forth on Schedule 1.1(a), including all forms, presentations, strengths, doses, and formulations (including any method of delivery), either alone or as a Combination Product, and all other “Licensed Products” (as defined in the Olpasiran License Agreement) licensed or sublicensed to one or more third parties under the Olpasiran License Agreement.

- 27 - “Olpasiran License Agreement” means that certain Second Collaboration and License Agreement by and between Amgen Inc. and Arrowhead Pharmaceuticals, Inc. dated as of September 28, 2016. “Orange Book” means the FDA publication “Approved Drug Products with Therapeutic Equivalence Evaluations,” which identifies drug products approved by the FDA under the Federal Food, Drug, and Cosmetic Act as well as patent and exclusivity information related to approved drug products, as may be amended from time to time. “Orange Book Patent” means any Product Patents issued in the U.S. and listed in Orange Book pursuant to 21 U.S.C. Section 355(b)(1), as such patent listing may be amended from time to time, together with all foreign counterpart patents. “Organizational Documents” means (a) with respect to any corporation or company, its certificate, articles or memorandum of incorporation, organization or association, and its by-laws, (b) with respect to any limited partnership, its certificate of limited partnership, and its partnership agreement, (c) with respect to any general partnership, its partnership agreement, and (d) with respect to any limited liability company, its articles of organization, and its operating agreement (or, in each case of (a) through (d), the equivalent or comparable constitutive documents with respect to any non-U.S. jurisdiction). In the event any term or condition of this Agreement or any other Loan Document requires any Organizational Document to be certified by a secretary of state or similar governmental official, the reference to any such “Organizational Document” shall only be to a document of a type customarily certified by such governmental official. “Other Connection Taxes” has the meaning specified in Section 2.15(a). “Other Taxes” has the meaning specified in Section 2.15(a). “Outbound License Agreement” means, individually or collectively as the context requires, the agreements listed in Items 1 through and including 5 of Schedule 4.23(b)(ii). “Participant Register” has the meaning specified in Section 10.6(h)(ii). “Partnered Assets” means (a) [**], (b) [**], and (c) any Products that are the subject of any Specified Transaction after such Specified Transaction is entered into. “Patent” means any patent or patent application, including any continuation, continuation-in-part, division, provisional or any substitute applications, any patent issued with respect to any of the foregoing patent applications, any certificate, reissue, reexamination, renewal or patent term extension or adjustment (including any supplementary protection certificate) of any such patent or other governmental actions which extend the duration or any of the subject matter of a patent, and any substitution patent, confirmation patent or registration patent or patent of addition based on any such patent, and all foreign counterparts of any of the foregoing. “PATRIOT Act” has the meaning specified in Section 4.29. “Payment Office” means Administrative Agent’s office located at 0000 XxXxxxxx Xxxxxx, Xxxxx 0000, Xxxxxx, Xxxxx 00000 or such other office or offices of Administrative Agent as may be designated in writing from time to time by Administrative Agent and Company. “PBGC” means the Pension Benefit Guaranty Corporation or any successor thereto.

- 28 - “Pension Plan” means any Employee Benefit Plan, other than a Multiemployer Plan, which is subject to Section 412 of the Internal Revenue Code, Section 302 of ERISA or Title IV of ERISA. “Perfection Certificate” means that certain Perfection Certificate, dated as of the Closing Date. “Permitted Acquisition” means any acquisition by Company or its wholly owned Subsidiaries, whether by purchase, merger, in-licensing or otherwise, of all or substantially all of the assets of, all of the Capital Stock of, or a business line or unit or a division of, or Patents, or similar or related Intellectual Property rights of, any Person; provided, (a) immediately prior to, and after giving effect thereto, no Default or Event of Default shall have occurred and be continuing or would result therefrom; (b) all transactions in connection therewith shall be consummated, in all material respects, in accordance with all applicable laws and in conformity with all applicable and material Governmental Authorizations; (c) in the case of the acquisition of Capital Stock, all of the Capital Stock (except for any such securities in the nature of directors’ qualifying shares required pursuant to applicable law) acquired or otherwise issued by such Person or any newly formed Guarantor Subsidiary in connection with such acquisition shall be owned [**]% by a Loan Party, and Company shall have taken, or caused to be taken, as of the date such Person becomes a Subsidiary, each of the actions required to be taken as of such date as set forth in Section 5.10, Section 5.11 and/or Section 5.12, as applicable; (d) Borrower and its Subsidiaries shall be in compliance with the covenant set forth in Section 6.8 on a pro forma basis after giving effect to such acquisition as of the last day of the Fiscal Quarter most recently ended; (e) to the extent the Market Capitalization Milestone is not satisfied, in the case of an acquisition with total consideration in excess of $[**], and solely to the extent reasonably available to the Company, the Company shall have delivered to Administrative Agent at least [**] (or such shorter period as agreed to by Administrative Agent in writing) prior to such proposed acquisition such information and documents that Administrative Agent may reasonably request, including, without limitation, financial information with respect to such acquired assets, to the extent such financial information is available, and drafts of the respective acquisition agreements related thereto; (f) any Person or assets or division as acquired in such Permitted Acquisition shall be in the same business or lines of business in which Company and/or its Subsidiaries are engaged as of the Closing Date (or in lines of business reasonably related or incidental thereto, or such other lines of business as may be consented to by Administrative Agent (such consent not to be unreasonably withheld or delayed)); (g) the acquisition shall have been approved by the Board of Directors or other governing body or controlling Person of the Person acquired or the Person from whom such assets or division is acquired or a court of competent jurisdiction; and (h) the assets being acquired (other than a de minimis amount of assets in relation to the assets being acquired) are located within [**] or the Person whose Equity Interests are being acquired is organized in a jurisdiction located within [**];

- 29 - (i) the total consideration (excluding any portion thereof paid with Common Stock of the Company or with proceeds of a substantially concurrent (and in no event more than [**] before or after such acquisition) issuance of Common Stock) paid or payable in connection with (x) an individual acquisition shall not exceed $[**] and (y) all such acquisitions consummated since the Closing Date shall not exceed $[**]; and (j) all such assets so acquired shall be subject to the mandatory prepayment obligations set forth in Section 2.10(h) and Section 2.10(i). “Permitted Convertible Indebtedness” means any Indebtedness of Borrower that is convertible based on a fixed conversion rate (subject to customary anti-dilution adjustments, “make-whole” increases and other customary changes thereto) into shares of Common Stock of Borrower (or other securities or property following a merger event or other change of the Common Stock of Borrower), cash or any combination thereof (with the amount of such cash or such combination determined by reference to the market price of such Common Stock or such other securities); provided that (a) at the time such Indebtedness is incurred, no Default or Event of Default has occurred and is continuing or would occur as a result of such incurrence, (b) all necessary corporate, company, shareholder or similar actions shall be taken and consents obtained in connection with the issuance of such Indebtedness, (c) the issuance of such Indebtedness shall be consummated in compliance with all applicable Requirements of Law, and (d) the documentation evidencing such Indebtedness shall have been delivered to Administrative Agent and shall be on customary terms for similar convertible transactions in the public markets (as determined by Borrower in good faith) but in all cases including all of the following terms: (i) it shall not have a cash pay interest rate that exceeds [**]% per annum, (ii) it shall be (and shall remain at all times) unsecured to the Obligations, (iii) it shall not have a maturity (and shall not have any scheduled amortization of principal) prior to the date that is [**] after the Term Loan Maturity Date in effect at the time such Indebtedness is incurred, (iv) if it has any negative covenants, such covenants (including covenants relating to incurrence of Indebtedness), shall not be more restrictive than those set forth herein, (v) it shall have no restrictions on Borrower’s or its Subsidiaries’ ability to grant liens securing the Obligations, (vi) it shall not prohibit the incurrence of the Obligations, (vii) it is not guaranteed by any Subsidiary and (viii) any cross-default or cross-acceleration event of default (each howsoever defined) provision contained therein that relates to indebtedness or other payment obligations of the Company (or any of its Subsidiaries) (such indebtedness or other payment obligations a “Cross-Default Reference Obligation”) contains a cure period of at least [**] (after written notice to the issuer of such Indebtedness by the trustee or to such issuer and such trustee by holders of at least [**]% (or any other applicable percentage) in the aggregate principal amount of such Indebtedness then outstanding) before a default, event of default, acceleration or other event or condition under such Cross-Default Reference Obligation results in an event of default under such cross-default or cross-acceleration provision. “Permitted Equity Derivative” means any forward purchase, accelerated share repurchase, call option, warrant or other derivative transactions in respect of Borrower’s Common Stock; provided, that (w) the terms, conditions and covenants of each such transaction shall be customary for transactions of such type, as determined by Borrower in good faith, (x) such transaction may, at the option of Borrower, be settled in Common Stock of Borrower, (y) such transaction is entered into contemporaneously and otherwise in connection with the issuance of Permitted Convertible Indebtedness or the Restricted Junior Payments in respect of such transaction are otherwise permitted pursuant to Section 6.5(f), and (z) such transaction shall be classified in Borrower’s stockholders’ equity under FASB ASC 815-40 or any successor provision. “Permitted Fazirsiran Reduction” means [**]. “Permitted Indebtedness” means:

- 30 - (a) the Obligations; (b) to the extent constituting Indebtedness, Permitted Intercompany Investments; provided, that such Indebtedness shall be unsecured and, to the extent such Indebtedness is owed by a Loan Party to a Subsidiary that is not a Loan Party, the parties thereto are party to an Intercompany Subordination Agreement; (c) Indebtedness incurred by Borrower or any of its Subsidiaries arising from agreements providing for indemnification or from guaranties or letters of credit, surety bonds or performance bonds securing the performance of Company or any such Subsidiary pursuant to such agreements, in connection with Permitted Acquisitions or Asset Sales permitted hereunder; (d) Indebtedness which may be deemed to exist pursuant to any guaranties, performance, surety, statutory, appeal or similar obligations incurred in the ordinary course of business and Indebtedness constituting guaranties in the ordinary course of business of the obligations of suppliers, customers, franchisees and licensees of Borrower and its Subsidiaries; (e) Indebtedness incurred in the ordinary course of business in connection with workers’ compensation, unemployment insurance and other types of social security, or to secure the performance of tenders, statutory obligations, surety and appeal bonds, bids, leases, government contracts, trade contracts, performance and return of money bonds and other similar obligations; (f) (i) Indebtedness in respect of netting services, overdraft protections and otherwise in connection with deposit accounts; and (ii) Indebtedness arising from the honoring by a bank or other financial institution of a check, draft or similar instrument inadvertently (except in the case of daylight overdrafts) drawn against insufficient funds in the ordinary course of business; provided, however, that such Indebtedness is extinguished within [**] of incurrence; (g) Indebtedness described in Schedule 6.1, and any Permitted Refinancing Indebtedness in respect of such Indebtedness; (h) Indebtedness in an aggregate amount outstanding not to exceed at any time, together with the aggregate amount of Indebtedness incurred pursuant to clause (m) below, $[**] with respect to (i) Capital Leases and (ii) purchase money Indebtedness (including any Indebtedness acquired in connection with a Permitted Acquisition); provided that any such Indebtedness shall be secured only by the asset subject to such Capital Lease or by the asset acquired in connection with the incurrence of such Indebtedness; (i) guaranties with respect to Indebtedness of Borrower or any of its Subsidiaries, to the extent that the Person that is obligated under such guaranty could have incurred such underlying Indebtedness to the extent such guaranties are not prohibited by Section 6.7; provided that, if the Indebtedness being guaranteed is subordinated to the Obligations, such guaranty shall be subordinated to the Obligations on terms at least as favorable to the Secured Parties as those contained in the subordination of such Indebtedness; (j) unsecured Indebtedness of Borrower owing to former employees, officers, or directors (or any spouses, ex-spouses, or estates of any of the foregoing) incurred in connection with the repurchase by Borrower of the Capital Stock of Borrower that has been issued to such Persons, so long as (i) no Default or Event of Default has occurred and is continuing or would result from the incurrence of such Indebtedness, (ii) the aggregate outstanding principal amount of all such Indebtedness incurred

- 31 - pursuant to this clause (j) does not exceed $[**], and (iii) such Indebtedness is subordinated to the Obligations on terms and conditions reasonably acceptable to Administrative Agent; (k) Indebtedness owed to any Person providing property, casualty, liability, or other insurance to the Loan Parties, so long as the amount of such Indebtedness is not in excess of the amount of the unpaid cost of, and shall be incurred only to defer the cost of, such insurance for the period in which such Indebtedness is incurred and such Indebtedness is outstanding only during such period; (l) contingent liabilities in respect of any indemnification obligation, adjustment of purchase price, deferred purchase price and compensation, or other similar arrangements incurred by such Person in connection with the consummation of one or more Permitted Acquisitions, any Investment permitted hereunder or any license, transfer or other Asset Sale permitted hereunder; (m) Indebtedness of a Person whose assets or Capital Stock are acquired by Borrower or any of its Subsidiaries in a Permitted Acquisition in an aggregate amount not to exceed, together with the aggregate amount of Indebtedness incurred pursuant to clause (h) above, $[**] at any one time outstanding; provided, that such Indebtedness (i) was in existence prior to the date of such Permitted Acquisition, (ii) is either purchase money Indebtedness or a Capital Lease with respect to equipment or mortgage financing with respect to a facility or other Indebtedness reasonably satisfactory to the Administrative Agent, and (iii) was not incurred in connection with, or in contemplation of, such Permitted Acquisition; (n) Permitted Convertible Indebtedness and any Permitted Refinancing Indebtedness in respect thereof in an aggregate outstanding principal amount not to exceed the greater of $[**] and [**]% of the aggregate market capitalization of the Company (based on the closing price of the Common Stock on the trading date immediately prior to the incurrence of such Indebtedness); provided that, any such Indebtedness incurred pursuant to this clause (n) shall not exceed $[**] in the aggregate at any time; (o) Indebtedness consisting of obligations in respect of letters of credit, bank guarantees, surety bonds or performance bonds in an aggregate outstanding principal amount not to exceed $[**]; (p) [reserved]; (q) Indebtedness owed to any financial institution in respect of purchasing or debit card programs, credit card programs and related liabilities arising from ordinary course treasury, depository or cash management services, including any payments in connection with the termination thereof; (r) Indebtedness consisting of take-or-pay obligations contained in supply arrangements in the ordinary course of business; (s) customer deposits and advance payments received in the ordinary course of business from customers for goods purchased in the ordinary course of business; (t) Indebtedness incurred in connection with bankers’ acceptances, discounted bills of exchange, warehouse receipts or similar facilities or the discounting or factoring of receivables for collection purposes, in each case incurred or undertaken in the ordinary course of business; (u) guarantees incurred in the ordinary course of business in respect of obligations to suppliers, customers, franchisees, lessors, licensees, sub-licensees and distribution partners;

- 32 - (v) to the extent constituting Indebtedness, obligations under a Permitted Royalty Transaction; provided that with respect to any Permitted Royalty Transaction entered into after the Closing Date (i), prior to entering into a Permitted Royalty Transaction, the Borrower shall provide written notice to the Lenders of any process run by or on behalf of the Borrower involving a Royalty Monetization Transaction and to negotiate in good faith with the Lenders should the Lenders elect to submit a bid for such Royalty Monetization Transaction; provided that the Borrower shall in no way be precluded from soliciting other bids and conducting contemporaneous negotiations with other third party bidders for such Royalty Monetization Transaction; (w) [reserved]; (x) obligations under any Hedging Agreement; (y) any Permitted Equity Derivatives; (z) other Indebtedness of Borrower and its Subsidiaries, which is unsecured in an aggregate amount not to exceed at any time $[**]; and (aa) ordinary course tenant improvement loans relating to leased property. For purposes of determining compliance with any Dollar-denominated restriction on the incurrence of Indebtedness, the Dollar equivalent principal amount of Indebtedness denominated in a foreign currency shall be calculated based on the relevant currency exchange rate in effect on the date such Indebtedness was incurred, in the case of term debt, or first committed, in the case of revolving credit debt. “Permitted Intercompany Investments” means Investments by (a) a Loan Party to or in another Loan Party, (b) a Subsidiary that is not a Loan Party to or in another Subsidiary that is not a Loan Party; provided that no Intellectual Property Rights; provided, that, no Product or Intellectual Property Rights with respect to any Product shall be assigned, transferred, contributed, licensed, sublicensed, or otherwise disposed by any Loan Party to a Subsidiary that is not a Loan Party pursuant to this clause (b) except for Registrations required to be transferred to satisfy regulatory requirements in jurisdictions outside the United States, and non-exclusive licenses required to permit such Subsidiary to operate and/or run clinical trials in the ordinary course of business, (c) a Subsidiary that is not a Loan Party to or in a Loan Party, so long as, in the case of a loan or an advance, such Subsidiary that is not a Loan Party subordinates the obligations owed by the Loan Party to the Obligations pursuant to an Intercompany Subordination Agreement and (d) a Loan Party to a subsidiary that is not a Loan Party; provided that, with respect to this clause (d), (i) the aggregate outstanding amount of such Investments does not exceed $[**] in the aggregate outstanding at any time, (ii) Company and its Subsidiaries shall be in compliance with the covenant set forth in Section 6.8 on a pro forma basis after giving effect to such Investment and (iii) in the event such Subsidiary becomes a Loan Party, such Investment is deemed to occur under clause (a) above upon such Subsidiary becoming a Loan Party; provided, further, that, no Product or Intellectual Property Rights with respect to any Product shall be assigned, transferred, contributed, licensed, sublicensed, or otherwise disposed by any Loan Party to a Subsidiary that is not a Loan Party pursuant to this clause (d) except for Registrations required to be transferred to satisfy regulatory requirements in jurisdictions outside the United States, and non-exclusive licenses required to permit such Subsidiary to operate and/or run clinical trials in the ordinary course of business. “Permitted Investments” means: (a) Investments in Cash and cash equivalents (including Cash Equivalents);

- 33 - (b) equity Investments owned as of the Closing Date in any Subsidiary and equity Investments owned after the Closing Date in any Subsidiary as a result of the formation of a Subsidiary to the extent otherwise permitted hereunder; (c) Permitted Intercompany Investments; (d) loans and advances to employees of Borrower and its Subsidiaries (i) made in the ordinary course of business and described on Schedule 6.6, and (ii) any refinancings of such loans after the Closing Date in an aggregate amount not to exceed $[**] at any time outstanding; (e) Permitted Acquisitions; (f) Investments described in Schedule 6.7 as of the Closing Date; (g) any Investments consisting of extensions of credit in the nature of accounts receivable or notes receivable arising from the grant of trade credit in the ordinary course of business or received in compromise or resolution of (i) obligations of trade creditors or customers that were incurred in the ordinary course of business of Borrower or any of its Subsidiaries, including pursuant to any plan of reorganization or similar arrangement upon the bankruptcy or insolvency of any trade creditor or customer or (ii) litigation, arbitration or other disputes; (h) Investments in negotiable instruments deposited or to be deposited for collection in the ordinary course of business; (i) Investments in the ordinary course of business consisting of customary trade arrangements with customers; (j) advances made in connection with purchases of goods or services in the ordinary course of business; (k) Investments held by a Person acquired in a Permitted Acquisition to the extent that such Investments were not made in contemplation of or in connection with such Permitted Acquisition and were in existence on the date of such Permitted Acquisition; (l) so long as no Event of Default has occurred and is continuing or would result therefrom, Investments in Joint Ventures; provided that, the aggregate amount of all such Investments in Joint Ventures shall not exceed $[**]; (m) Permitted Equity Derivatives; (n) Investments (including debt obligations) received in connection with the bankruptcy or reorganization of suppliers and customers and in settlement of delinquent obligations of, and other disputes with, customers and suppliers arising in the ordinary course of business; (o) Investments in Hedging Agreements; (p) any Investment of the non-cash consideration received from an Asset Sale that was made pursuant to and in compliance with this Agreement;

- 34 - (q) Investments consisting of xxxxxxx money deposits made by Borrower or its Subsidiaries in connection with any letter of intent or other agreement in respect of any Investment permitted by this Agreement; (r) [reserved]; (s) guarantees of operating leases or of other obligations, in each case, that do not constitute Indebtedness, and are entered into by Borrower or any Subsidiary in the ordinary course of business; (t) Investments consisting of the redemption, purchase, repurchase or retirement of any Capital Stock of Borrower permitted by this Agreement; (u) [reserved]; and (v) so long as no Event of Default has occurred and is continuing or would result therefrom, other Investments in Cash in an aggregate amount outstanding not to exceed $[**]. “Permitted Liens” means: (a) Liens in favor of Administrative Agent for the benefit of Secured Parties granted pursuant to any Loan Document; (b) Liens for Taxes (i) not yet due and payable or (ii) if obligations with respect to such Taxes are being contested in good faith by appropriate proceedings promptly instituted and diligently conducted and adequate reserves required by GAAP have been made; (c) statutory Liens of landlords, banks (and rights of set off), of carriers, warehousemen, mechanics, repairmen, workmen and materialmen, and other Liens imposed by law (other than any such Lien imposed pursuant to Section 401(a)(29) or 412(n) of the Internal Revenue Code or by ERISA), in each case incurred in the ordinary course of business for amounts not yet overdue; (d) Liens incurred in the ordinary course of business in connection with workers’ compensation, unemployment insurance and other types of social security, or to secure the performance of tenders, statutory obligations, surety and appeal bonds, bids, leases, government contracts, trade contracts, performance and return of money bonds and other similar obligations (exclusive of obligations for the payment of borrowed money or other Indebtedness), so long as no foreclosure, sale or similar proceedings have been commenced with respect to any portion of the Collateral on account thereof; (e) easements, rights of way, restrictions, encroachments, and other minor defects or irregularities in title, in each case which do not and will not interfere in any material respect with the ordinary conduct of the business of Borrower or any of its Subsidiaries; (f) any interest or title of a lessor or sublessor under any lease of real estate permitted hereunder; (g) Liens solely on any xxxx xxxxxxx money deposits made by Borrower or any of its Subsidiaries in connection with any letter of intent or purchase agreement permitted hereunder;

- 35 - (h) purported Liens evidenced by the filing of precautionary UCC financing statements relating solely to operating leases of personal property entered into in the ordinary course of business; (i) Liens in favor of customs and revenue authorities arising as a matter of law to secure payment of customs duties in connection with the importation of goods; (j) any zoning or similar law or right reserved to or vested in any governmental office or agency to control or regulate the use of any real property; (k) Xxxxx described in Schedule 6.2; provided that any such Lien shall only secure the Indebtedness that it secures on the Closing Date and any Permitted Refinancing Indebtedness in respect thereof; (l) Liens securing Capital Leases or purchase money Indebtedness permitted pursuant to clause (h) of the definition of Permitted Indebtedness; provided, any such Lien shall encumber only the asset subject to such Capital Lease or the asset acquired with the proceeds of such Indebtedness; (m) Liens granted in the ordinary course of business on the unearned portion of insurance premiums securing the financing of insurance premiums to the extent the financing is permitted under the definition of Permitted Indebtedness; (n) Liens assumed by Borrower and its Subsidiaries in connection with a Permitted Acquisition that secure Indebtedness permitted by clause (m) of the definition of Permitted Indebtedness; (o) Liens solely on any cash and Cash Equivalents (and related segregated Deposit Accounts or Securities Accounts) securing Indebtedness permitted pursuant to clause (o) of the definition of Permitted Indebtedness, and (ii) Liens on cash deposits not exceeding $[**] in the aggregate securing Indebtedness permitted pursuant to clause (q) of the definition of Permitted Indebtedness; (p) [reserved]; (q) Liens in favor of vendors or suppliers of such Person in the ordinary course of business to the extent encumbering property purchased from or provided by such vendors or suppliers and the proceeds thereof; (r) Liens securing any judgments, writs or warrants of attachment or similar process not constituting an Event of Default under Section 8.1(h); (s) Liens that are contractual rights of setoff relating to purchase orders entered into with customers, vendors or suppliers of such Person in the ordinary course of business; (t) to the extent constituting Liens, licenses and sublicenses pursuant to Asset Sales permitted under Sections 6.9(b)(xi), (b)(xvii), (b)(xviii), (b)(xix), and non-exclusive licenses permitted under Section 6.9(b)(xx); (u) bankers’ Liens, rights of setoff and other similar Liens existing solely with respect to cash and Cash Equivalents on deposit in one or more accounts maintained by Borrower or its Subsidiaries, in each case granted in the ordinary course of business in favor of the bank or banks with which such accounts are maintained, securing amounts owing to such bank with respect to cash management and operating account arrangements, including those involving pooled accounts and netting

- 36 - arrangements, as part of a bank’s standard term and conditions; provided, that, unless such Liens are non-consensual and arise by operation of law, in no case shall any such Liens secure (either directly or indirectly) the repayment of any Indebtedness; (v) Liens (i) of a collection bank arising under Section 4-210 of the UCC, or any comparable or successor provision, on items in the course of collection; and (ii) in favor of banking or other financial institutions or entities, or electronic payment service providers, arising as a matter of law encumbering deposits (including the right of set-off) and which are within the general parameters customary in the banking or finance industry; (w) Permitted Security Interests (as defined below) granted pursuant to any Permitted Royalty Transaction; (x) Liens on specific items of inventory or other goods and proceeds of the Borrower or a Subsidiary securing such Person’s obligations in respect of bankers’ acceptances or letters of credit entered into in the ordinary course of business issued or created for the account of such Person to facilitate the purchase, shipment or storage of such inventory or other goods; (y) Liens arising from, or from UCC financing statement filings regarding, operating leases entered into by the Borrower or its Subsidiaries in the ordinary course of business or consistent with industry practice; (z) Liens on inventory arising out of conditional sale, title retention, consignment or similar arrangements with customers or suppliers, in each case to the extent entered into in the ordinary course of business or consistent with industry practice; (aa) any encumbrance or restriction, including any put and call arrangements, related to Capital Stock in any Joint Venture set forth in the operating or organizational documents of such Joint Venture or any related joint venture, shareholders’ or similar agreement; (bb) Liens on insurance policies and the proceeds thereof securing the financing of the premiums with respect thereto; (cc) [reserved]; (dd) [reserved]; (ee) [reserved]; (ff) Liens of a collecting bank arising in the ordinary course of business under Section 4-208 of the UCC in effect in the relevant jurisdiction covering only the items being collected upon; and (gg) other Liens incurred in the ordinary course of business of Borrower or any Subsidiary of Borrower with respect to obligations that do not exceed, together with Xxxxx described in clause (b) above, $[**] in the aggregate at any one time outstanding; provided, that, such Lien shall not be on Product Intellectual Property Rights, Platform Intellectual Property Rights or Registrations. Notwithstanding anything to the contrary contained in this Agreement or in any other Loan Document, no Liens on any Product (other than inventory), Intellectual Property Rights relating to any Product or Registrations relating to any Product shall be permitted under this Agreement (other than non-consensual

- 37 - Liens constituting “Permitted Liens” and Xxxxx described in clauses (a), (t) and (w) above). “Permitted Plozasiran Agreement” means any agreement with respect to a Permitted Royalty Transaction with respect to Xxxxxxxxxx, subject to the prepayment obligations required by Section 2.10(g). “Permitted Product Agreement” means a Product Agreement that grants a license or sublicense of any rights under any Product Intellectual Property Rights, Platform Intellectual Property Rights, Registrations, Regulatory Documentation, or Collateral that allows the Licensee to research, develop, Commercialize, manufacture, distribute or otherwise utilize a Product in any Core Market or Non-Core Market; provided that, any such Product Agreement (i) [**], (ii) permits the disclosure of royalty, development, commercialization and similar reports, and copies of any written notices (other than filings, submissions, reports, notices, correspondence and other documentation related to routine patent prosecution in the ordinary course and any materials that would be deemed privileged in connection with patent litigation) furnished to or by any the Loan Parties pursuant to such Product Agreement, to the Administrative Agent and the Lenders in accordance with Section 5.1(e), and (iii) [**]; provided that, if requested by Xxxxxxxx, the Administrative Agent shall enter into [**], in form and substance reasonably satisfactory to the Administrative Agent, in connection with the entry by Borrower or any Subsidiary into any Permitted Product Agreement. “Permitted Product Transaction” means the grant of a license or sublicense or any other disposition of any rights under any Product Intellectual Property Rights, Platform Intellectual Property Rights, Registrations, Regulatory Documentation, or Collateral pursuant to a Permitted Product Agreement. “Permitted Reduction” means a Reduction taken by a counterparty to a Permitted Product Agreement, including any such agreement for a Partnered Asset, against any payment of any Royalties, Milestones, Profit Share Amounts or Joint Venture Proceeds pursuant to the express terms of such Permitted Product Agreement, excluding any amount owing from the Borrower or any of its Subsidiaries to the counterparty of such Permitted Product Agreement in respect of any right of such counterparty against the Borrower or any of its Subsidiaries arising from or in connection with such Permitted Product Agreement (other than an obligation owing from the Borrower or any of its Subsidiaries to such counterparty due to any overpayment of Royalties, Milestones, Profit Share Amounts or Joint Venture Proceeds by such counterparty). “Permitted Refinancing Indebtedness” means any Indebtedness of Borrower or any of its Subsidiaries issued in exchange for, or the net proceeds of which are used to renew, refund, refinance, replace, defease or discharge other Indebtedness of Borrower or any of its Subsidiaries; provided that: (a) the principal amount (or accreted value, if applicable) of such Permitted Refinancing Indebtedness does not exceed the principal amount (or accreted value, if applicable) of the Indebtedness renewed, refunded, refinanced, replaced, defeased or discharged (plus all accrued interest on the Indebtedness and the amount of all fees and expenses, including premiums, incurred in connection therewith); (b) such Permitted Refinancing Indebtedness (i) has a final maturity date later than the final maturity date of, and has a Weighted Average Life to Maturity equal to or greater than the Weighted Average Life to Maturity of, the Indebtedness being renewed, refunded, refinanced, replaced, defeased or discharged or (ii) has a final maturity date later than the final maturity date of, and has a Weighted Average Life to Maturity equal to or greater than the Weighted Average Life to Maturity of, the Term Loans;

- 38 - (c) if the Indebtedness being renewed, refunded, refinanced, replaced, defeased or discharged is subordinated in right of payment to the Obligations, such Permitted Refinancing Indebtedness is subordinated in right of payment to, the Obligations on terms at least as favorable to Administrative Agent and the Lenders as those contained in the documentation governing the Indebtedness being renewed, refunded, refinanced, replaced, defeased or discharged; (d) such Indebtedness is incurred either by Borrower or by the Subsidiary who is the obligor on the Indebtedness being renewed, refunded, refinanced, replaced, defeased or discharged; and (e) in the case of Permitted Convertible Indebtedness, such Indebtedness complies with the terms set forth in the proviso of the definition of Permitted Convertible Indebtedness. “Permitted Reinvestment Purposes” has the meaning specified in Section 2.10(b)(ii). “Permitted Royalty Transaction” means (a) the Royalty Monetization Transaction pursuant to the RPI Agreement as in effect on November 9, 2022 (as amended, supplemented or otherwise modified from time to time in a manner not adverse to the Lenders, it being understood that any amendment, supplement or modification that would (i) adversely affect the amount or timing of the payment of the RPI Milestones or (ii) sell any additional Royalties, Milestones or other payments with respect to any Product would be adverse to Lenders) and (b) any Royalty Monetization Transaction involving the sale by Borrower to any third party of up to a [**]% Royalty entitlement or [**]% Product Revenues entitlement (in the aggregate), in each case, on net sales of Plozasiran, including the grant of a Permitted Security Interest to such third party in connection with such Permitted Royalty Transaction. “Permitted Security Interest” means, solely in connection with a Permitted Royalty Transaction under clause (b) of such defined term, (a) a first priority security interest on the Royalties or Product Revenues sold to a third party pursuant to a Permitted Royalty Transaction, and (b) with respect to a sale of Product Revenues, a second priority security interest (subordinated in all respects to the Administrative Agent’s first priority security interest pursuant to an intercreditor agreement reasonably acceptable to the Administrative Agent) on the Plozasiran Product Intellectual Property Rights, in each case granted by the Borrower to a buyer of such Royalties or Product Revenues in connection with such Permitted Royalty Transaction solely to secure the payment of such Royalties or Product Revenues. “Permitted Zodasiran Agreement” means any Permitted Product Agreement with respect to Zodasiran entered into between the Borrower or any of its Subsidiaries with another Person solely with respect to any research, development, manufacture, use, marketing, Commercialization and/or distribution arrangements with respect to Zodasiran and/or the granting of any exclusive licenses in any territory with respect to Zodasiran subject to any prepayments required by Section 2.10(f); provided that, such transaction must be consummated on or prior to August 7, 2026. “Person” means and includes natural persons, corporations, companies, limited partnerships, general partnerships, limited liability companies, limited liability partnerships, joint stock companies, Joint Ventures, associations, companies, trusts, banks, trust companies, land trusts, business trusts or other organizations, whether or not legal entities, and Governmental Authorities. “Personal Information” means any information that identifies or can be used to identify a natural person, including any information defined as “personal data,” “personally identifiable information,” “personal information,” “protected health information,” or “nonpublic personal information” under applicable Data Protection Laws.

- 39 - “Pipeline Asset Monetization” means, with respect to any Pipeline Product (excluding, for the avoidance of doubt, any Material Product), (i) the sale, assignment, conveyance, transfer, or other disposition for value of Capital Stock pursuant to any Joint Venture that relates solely to one or more Pipeline Products in a specific territory (including worldwide), (ii) the license or sublicense to a third party for value of any Pipeline Product in a specific territory (including worldwide) pursuant to a Permitted Product Agreement, and/or or (iii) the sale, assignment, conveyance, transfer, or other disposition for value of all or substantially all of the Pipeline Assets for such Pipeline Product required to develop, manufacture and Commercialize such Pipeline Product in a specific territory (including worldwide); provided that (A) solely in case of (iii) above, such transactions do not include or otherwise relate to any tangible or intangible assets used or held for use in the development, manufacture or Commercialization of any Material Product, and (B) in each case (i), (ii) and (iii) above, all amounts received by Borrower and its Subsidiaries in respect of such territory (a “Monetized Territory”) shall be subject to the mandatory prepayments set forth in Section 2.10(h) (it being understood, for the avoidance of doubt, that any amounts generated by Borrower and its Subsidiaries from the development, manufacture and Commercialization by the Loan Parties of such Pipeline Product outside such Monetized Territory shall be subject to the mandatory prepayments set forth in Section 2.10(i)). “Pipeline Assets” shall mean, with respect to a Pipeline Product, on a territory-by-territory basis, the Product Intellectual Property Rights, Regulatory Documentation, and other tangible and intangible assets exclusively relating to such Pipeline Product in a territory, in each case, solely to the extent such tangible and intangible assets are both (x) required to develop and Commercialize such Pipeline Product, and (y) are not related to or otherwise useful for the development, manufacture or Commercialization of any other Product (other than such Pipeline Product in such territory). For the avoidance of doubt, Pipeline Assets specifically exclude all Platform Intellectual Property Rights and all other tangible and intangible assets that are related to or otherwise useful for the development, manufacture, use or Commercialization of any Product other than such Pipeline Product and specifically shall not include real property, plant, equipment, inventory and other tangible assets of Borrower, any of its subsidiaries or Affiliates or any deposit accounts, cash and cash equivalents, investment property, and instruments of Borrower, any of its subsidiaries and Affiliates. “Pipeline Percentage” has the meaning specified in Section 2.10(h). “Pipeline Product” means any Product, other than Material Products, being researched, developed, manufactured or Commercialized by the Borrower, any of its Subsidiaries, or any Licensees from time to time, including any Product acquired after the Closing Date of this Agreement, regardless of form, including, for the avoidance of doubt, any Product that was the subject of a Specified Transaction as of the Closing Date that is not consummated within the time period set forth in subsection (c) of the definition of “Specified Transaction”. “Platform Intellectual Property Rights” means any and all (a) Platform Technology, (b) Platform Patents, and (c) Intellectual Property Rights other than Platform Technology and Platform Patents owned by or exclusively licensed to, or purported to be owned by or exclusively licensed to, Borrower or its Subsidiaries relating to the Platform Technology (but excluding all Product Intellectual Property Rights) or that, absent a valid license or other rights under such other Intellectual Property Rights, would be infringed or misappropriated by the research, development, manufacture, use or Commercialization of the Platform Technology, including the Platform Patents and such other Intellectual Property Rights listed on Schedule 4.23(c)(ii). “Platform Patents” means the U.S. and foreign Patents and pending Patent applications owned or Controlled by the Borrower or any of its Subsidiaries, now or in the future, that claim or otherwise cover generally the Platform Technology, including the making, using or selling of RNAi Molecules generally

- 40 - and do not specifically claim or otherwise cover solely the making, using or selling of only a specific Product. “Platform Patents” include the Patents listed on Schedule 4.23(c)(ii). “Platform Technology” means all Know-How owned or Controlled by the Borrower and its Subsidiaries, now or in the future, that relates generally to the composition of matter, formulation, form, or methods of use, delivery or manufacture of RNAi Molecules regardless of gene target and do not specifically relate to the composition of matter, formulation, form, or methods of use, delivery or manufacture solely of a specific Product. “Pledge and Security Agreement” means the Pledge and Security Agreement executed by Grantors in favor of Administrative Agent for the benefit of the Secured Parties, in form and substance reasonably satisfactory to Administrative Agent, as amended, amended and restated, supplemented or otherwise modified from time to time. “Plozasiran” means the pharmaceutical product candidate having the chemical structure set forth on Schedule 1.1(a), including all forms (including salt forms), presentations, strengths, doses, and formulations (including any method of delivery), either alone or as a Combination Product, and including any other licensed products licensed or sublicensed to a third party under any Permitted Plozasiran Agreement. “Prime Rate” means the rate of interest quoted in The Wall Street Journal, Money Rates Section as the Prime Rate (currently defined as the base rate on corporate loans posted by at least 75% of the nation’s thirty (30) largest banks), as in effect from time to time. The Prime Rate is a reference rate and does not necessarily represent the lowest or best rate actually charged to any customer. The Administrative Agent or any other Lender may make commercial loans or other loans at rates of interest at, above or below the Prime Rate. “Principal Office” means Administrative Agent’s “Principal Office” as set forth on Appendix B, or such other office as such Person may from time to time designate in writing to Company and each Lender. “Pro Rata Share” means, with respect to: (a) (i) a Lender’s obligation to make the Initial Term Loan, the percentage obtained by dividing (A) such Lender’s Initial Term Loan Commitment by (B) the Total Initial Term Loan Commitment, (ii) a Lender’s obligation to make a Delayed Draw Term Loan, the percentage obtained by dividing (A) such Lender’s Delayed Draw Term Loan Commitment by (B) the aggregate amount of the Lenders’ Delayed Draw Term Loan Commitments and (iii) a Lender’s right to make an Incremental Term Loan, the percentage obtained by dividing (A) such Lender’s outstanding Term Loans and unfunded Delayed Draw Term Loan Commitments by (B) the aggregate amount of all of the Lenders’ outstanding Term Loans and unfunded Delayed Draw Term Loan Commitments; (b) a Lender’s right to receive payments of interest, fees and principal with respect to a Term Loan, the percentage obtained by dividing (i) the aggregate unpaid principal amount of such Xxxxxx’s portion of the Term Loan, by (ii) the aggregate unpaid principal amount of the Term Loan; and (c) all other matters, the percentage obtained by dividing (i) the sum of such Lender’s Delayed Draw Term Loan Commitment and the unpaid principal amount of such Xxxxxx’s portion of the Term Loan, by (ii) the sum of the Total Delayed Draw Term Loan Commitment and the aggregate unpaid principal amount of the Term Loan.

- 41 - “Product” means any product or product candidate being researched, developed, manufactured, or Commercialized by the Borrower, its Subsidiaries or any Licensees on or after the Closing Date, including but not limited to Zodasiran, any Pipeline Product, any Partnered Assets, and Plozasiran, including all forms (including salt forms), presentations, strengths, dosages and formulations (including any method of delivery), but excluding any third party product manufactured by Borrower or such Subsidiary solely on a contract manufacturing basis for such third party that is not a Licensee under a License Agreement. “Product Agreement” means any agreement or Joint Venture entered into between Company or any of its Subsidiaries with another Person that includes any research, development, manufacturing, marketing, Commercialization and/or distribution arrangements, the granting of a license or sublicense of, or covenant not to assert, any rights under any Product Intellectual Property Rights, Platform Intellectual Property Rights, Registrations, Regulatory Documentation, or Collateral. For the avoidance of doubt, the License Agreements and the RPI Agreement are “Product Agreements”. “Product Intellectual Property Rights” means, on a Product-by-Product basis, any and all Product Patents and other Intellectual Property Rights owned by or exclusively licensed to, or purported to be owned by or exclusively licensed to, Borrower or its Subsidiaries that (a) are necessary and used exclusively in the research, development, manufacture, use or Commercialization of such Product and (b) are not necessary or used in the research, development, manufacture, use or Commercialization of any other Product, including, for each Partnered Asset, the Patents, registered and applied for Copyrights, and registered and applied for Trademarks constituting such Intellectual Property Rights listed on Schedule 4.23(c)(i). “Product Patents” means, on a Product-by-Product basis, the U.S. and foreign Patents and pending Patent applications (other than Platform Patents) that are owned or Controlled by the Borrower or any of its Subsidiaries, now or in the future, that claim or otherwise cover solely the composition of matter, formulation, form, or method of use, delivery or manufacture of such specific Product (and no other Product), including the making, using, or selling of such specific Product, and are necessary to the research, development, manufacture, use or Commercialization of such Specific Product. “Product Patents” include the Patents listed on Schedule 4.23(c)(i). “Product Revenue” means, for any period, (a) the consolidated gross revenues of the Borrower and its Subsidiaries generated solely through the commercial sale of Products to third parties by the Borrower and its Subsidiaries or any of its or their Licensees during such period, less, without duplication, any Permitted Deductions, and (b) the consolidated gross revenues of the Borrower and its Subsidiaries generated solely through the commercial supply of products to Licensees and distributors calculated at the applicable transfer price, all, in respect of clauses (a) and (b), as determined in accordance with GAAP and calculated on a basis consistent with the applicable financial statements of the Borrower or its Subsidiaries. For purposes of determining Product Revenue, a “sale” shall not include transfers or dispositions of such Product for pre-clinical or clinical purposes or as samples or for charitable, promotional, manufacturing, testing, qualification or regulatory purposes, in each case, to the extent at or below the Borrower’s or its Subsidiaries’ cost of goods therefor. Product Revenue shall not include sales or transfers between or among the Borrower or its Affiliates, or its or their Licensees. If any Product is sold as a Combination Product in any country, then Product Revenue for such Combination Product will be calculated by the Combination Product Calculation (replacing each instance of “Global Net Sales” thereunder with “Product Revenue,” mutatis mutandis). “Product Revenue Report” has the meaning set forth in Section 5.1(t). “Profit Share Amount” means with respect to any Permitted Product Agreement that includes a profit sharing or profit and loss sharing arrangement in a particular territory (a “Profit Share Territory”),

- 42 - for a particular Fiscal Quarter, the amount equal to the Loan Parties’ percentage of the gross profits generated from all sales of Products made in the Profit Share Territory in such Fiscal Quarter (including any Sublicense Revenue), regardless of whether such sales are made by a Loan Party, any counterparty or any Licensees under such Permitted Product Agreement; provided, however, that notwithstanding the foregoing, in the case of Fazirsiran, the Profit Share Amount shall be amount equal to [**]% of (a) Net Sales (as defined in the Fazirsiran License Agreement) of Products (as defined in the Fazirsiran License Agreement), regardless of whether such sales are made by a Loan Party or any counterparty under the Fazirsiran License Agreement, and (b) Sublicense Revenue in the Profit-Share Territory (each term, as defined in the Fazirsiran License Agreement). “Profit Share Territory" has (a) with respect to Fazirsiran, the meaning assigned to that term in the Fazirsiran License Agreement, and (b) with respect to all other Products, the meaning assigned to such term in the definition of Profit Share Amount. “Projections” has the meaning specified in Section 4.8. “Protective Advances” has the meaning specified in Section 9.11. “Public Health Laws” means all Requirements of Law relating to the procurement, development, clinical and non-clinical evaluation, product approval or licensure, manufacture, production, analysis, distribution, dispensing, importation, exportation, use, handling, quality, sale, labeling, promotion, clinical trial registration or post market requirements of any drug, biologic or other medical product (including, without limitation, any ingredient or component of the foregoing products) subject to regulation under the FDA Laws and the Public Health Service Act (42 U.S.C. § 201 et seq.), as well as comparable applicable foreign laws, and including without limitation the regulations promulgated by the FDA at Title 21 of the Code of Federal Regulations and all applicable regulations promulgated by the National Institutes of Health (“NIH”) and codified at Title 42 of the Code of Federal Regulations, and guidance, compliance, guides, and other policies issued by the FDA, the NIH and other comparable Governmental Authorities. “Qualified Capital Stock” means, with respect to any Person, all Capital Stock of such Person that is not Disqualified Capital Stock. “Qualified Cash” means, as of any date of determination, (x) prior to the date that is [**] after the Closing Date (or such later date as agreed in writing by the Administrative Agent in its reasonable discretion), the amount of unrestricted Cash and Cash Equivalents (other than restrictions created by the Collateral Documents) of the Loan Parties that is in Deposit Accounts or Securities Accounts located in the United States and (y) on and after the date that is [**] after the Closing Date (or such later date as agreed in writing by the Administrative Agent in its reasonable discretion), the amount of unrestricted Cash and Cash Equivalents (other than restrictions created by the Collateral Documents) of the Loan Parties that is in Deposit Accounts or Securities Accounts located in the United States, or any combination thereof and, in each case subject to a first priority perfected security interest (including in the case of Deposit Accounts and Securities Accounts located in the United States, subject to a Control Agreement). “Qualified Entity” means any entity that (a) is a pharmaceutical and/or biologics company with global annual revenue for its most recently ended fiscal year that is equal to or greater than $[**] and (b) [**]. “Real Estate Asset” means, at any time of determination, any Real Property owned by a Loan Party, but only to the extent such Real Property constitutes Collateral and is encumbered by a Mortgage pursuant to the terms of this Agreement.

- 43 - “Real Property” means, collectively, all right, title and interest (including any leasehold, mineral or other estate) in and to any and all parcels of or interests in real property owned, leased or operated by any person. “Recipient” has the meaning assigned to such term in Section 10.20. “Reduction” means any set-off, counterclaim, credit, reduction or deduction, whether by contract or otherwise, taken against Royalties, Milestones, Sublicense Revenues, Profit Share Amounts or Joint Venture Proceeds. “Register” has the meaning specified in Section 2.3(b). “Registrations” shall mean authorizations, approvals, licenses, permits, certificates, registrations, listings, certificates, or exemptions of or issued by any Governmental Authority (including marketing approvals, investigational new drug applications or clinical trial applications, product recertifications, manufacturing approvals and authorizations, pricing and reimbursement approvals, labeling approvals or their foreign equivalent) that are required for the research, development, manufacture, commercialization, distribution, import, export, marketing, storage, transportation, pricing, Governmental Authority reimbursement, use and sale of Products. “Regulation D” means Regulation D of the Board of Governors of the Federal Reserve System, as in effect from time to time. “Regulatory Action” means any administrative or regulatory action, proceeding or investigation, warning letter, untitled letter, other notice of violation letter, recall, seizure, injunction or complaint for injunction, Section 305 notice or other similar written communication, consent order or consent decree, issued under the Public Health Laws by the FDA, the U.S. Department of Health and Human Services, the U.S. Department of Justice, or any comparable Governmental Authority in any other regulatory jurisdiction, including any inspectional observations recorded on a Form FDA 483, any Establishment Inspection Report, and any written request from FDA for a regulatory meeting. “Regulatory Documentation” means all (a) Registrations, (b) written correspondence and reports submitted to or received from Governmental Authorities (including minutes and official contact reports relating to any communications with any Governmental Authority) and all supporting documents with respect thereto, including all advertising and promotion documents, adverse event files, and complaint files, and (c) non-clinical and clinical data, research protocols, and data contained or relied upon in any of the foregoing, in each case ((a), (b), and (c)) relating to any Product. “Reinvestment Amounts” has the meaning specified in Section 2.10(b)(ii). “Related Fund” means, with respect to any Lender that is an investment fund or an Affiliate of an investment fund, any other Person that makes, purchases, holds or otherwise invests in commercial loans and that is managed, administered or advised by the same investment advisor as such Lender or by an Affiliate of such investment advisor. “Release” means any release, spill, emission, leaking, pumping, pouring, injection, escaping, deposit, disposal, discharge, dispersal, dumping, leaching or migration of any Hazardous Material into the indoor or outdoor environment (including the abandonment or disposal of any barrels, containers or other closed receptacles containing any Hazardous Material), including the movement of any Hazardous Material through the air, soil, surface water or groundwater.

- 44 - “Remedial Action” means all actions taken to (a) correct or address any actual or threatened non- compliance with Environmental Law, (b) clean up, remove, remediate, contain, treat, monitor, assess, evaluate or in any other way address Hazardous Materials in the indoor or outdoor environment, (c) prevent or minimize a Release or threatened Release of Hazardous Materials so they do not migrate or endanger or threaten to endanger public health or welfare or the indoor or outdoor environment, (d) perform pre- remedial studies and investigations and post-remedial operation and maintenance activities; or (e) perform any other actions authorized or required by Environmental Law or Governmental Authority. “Replacement Lender” has the meaning specified in Section 2.18. “Required Lenders” means Lenders whose Pro Rata Share (calculated in accordance with clause (c) of the definition thereof) aggregate at least 50.1%. “Required Milestone Cash Amount” means (a) at all times when the Market Capitalization Milestone is satisfied, $[**] or (b) at any time when the Market Capitalization Milestone is not satisfied and remains unsatisfied for a period of [**], $[**]; provided, that, if the Market Capitalization Milestone is unsatisfied for a period of [**], the Required Milestone Cash Amount shall remain at $[**] until such time as the Market Capitalization Milestone is satisfied for a period of [**]. “Requirements of Law” means, with respect to any Person, collectively, the common law and all federal, state, provincial, local, foreign, multinational or international laws, statutes, codes, treaties, standards, rules and regulations, guidelines, ordinances, orders, judgments, writs, injunctions, decrees (including administrative or judicial precedents or authorities) and the interpretation or administration thereof by, and other determinations, directives, requirements or requests of, any Governmental Authority, in each case that are applicable to or binding upon such Person or any of its property or to which such Person or any of its property is subject. “Restricted Junior Payment” means (a) any dividend or other distribution, direct or indirect, on account of any shares of any class of Capital Stock of Borrower now or hereafter outstanding, except a dividend payable solely in shares of Capital Stock to the holders of that class, together with any payment or distribution pursuant to a “plan of division” under the Delaware Limited Liability Act or any comparable transaction under any similar law, (b) any redemption, retirement, sinking fund or similar payment, purchase or other acquisition for value, direct or indirect, of any shares of any class of Capital Stock of Borrower or any of its Subsidiaries that is not a Loan Party now or hereafter outstanding, (c) any payment made to retire, or to obtain the surrender of, any outstanding warrants, options or other rights to acquire shares of any class of Capital Stock of Borrower or any of its Subsidiaries that is not a Loan Party now or hereafter outstanding, and (d) any payment or prepayment of principal of, premium, if any, or interest on, or redemption, purchase, retirement, defeasance (including in substance or legal defeasance), sinking fund or similar payment with respect to, any subordinated Indebtedness. “Restricted License” means any Product Agreement entered into after the Closing Date that (i) cannot be collaterally assigned to secure the Obligations, or otherwise contains provisions that restrict or penalize the granting of a security interest in or Lien securing the Obligations on such Product Agreement or the related Product Intellectual Property Rights, (ii) restricts the assignment of such Product Agreement upon the sale or other disposition of all or substantially all of the assets to which such Product Agreement relates (other than customary provisions requiring the assumption by the applicable purchaser of all obligations under such Product Agreement), or (iii) does not permit the disclosure of information to be provided thereunder to Administrative Agent and the Lenders, any purchaser or prospective purchaser in a foreclosure or other transfer of all or any portion of the Collateral (subject to customary confidentiality obligations); provided a Product Agreement shall not be a “Restricted License” by virtue of clause (iii) if

- 45 - Borrower and/or the applicable Subsidiary has used commercially reasonable efforts to remove or not include any such restriction. “RNAi Molecule” means a molecule comprising an exogenous double-stranded oligonucleotide (i.e., RNA or modified variants thereof) comprising a nucleotide sequence designed to inhibit the expression of a gene using the RNA interference mechanism. “Royalties” means (i) any and all royalty payments received by or on behalf of Borrower or its Subsidiaries under any Permitted Product Agreement with respect to a Product, (ii) any and all payments received by Borrower or its Subsidiaries in lieu of such payments described in the foregoing clause (i) under the applicable Permitted Product Agreement, (iii) any and all interest payments received by or on behalf of Borrower or its Subsidiaries under a Permitted Product Agreement assessed on any payments or amounts described in the foregoing clauses (i) and (ii), and (iv) without duplication of any payment actually made under clauses (i), (ii) and (iii), any and all “proceeds” recoverable or recovered with respect to any of the foregoing. “Royalty Monetization Transaction” means any monetization transaction involving the sale, transfer, option or collateralization of (i) any monetary payments (contingent or otherwise) payable to Borrower or its Subsidiaries by a counterparty under a Product Agreement (including any Royalties, Milestones and Profit Share Amounts payable thereunder), or (ii) any Product Revenues, in each case whether in whole or in part, in each case (i) and (ii) including but not limited to sales of royalty streams, royalty bonds and other royalty financings, synthetic royalty and revenue interest transactions (including but not limited to clinical trial funding arrangements), and hybrid monetization transactions. “Royalty Reports” means any royalty reports, net sales reports or other similar reports deliverable by a counterparty pursuant to any Permitted Product Agreement. “RPI Agreement” means that certain Royalty Purchase Agreement by and between Borrower and Royalty Pharma Investments 2019 ICAV, dated as of November 9, 2022. “RPI Milestones” means the “Additional Purchase Price Payments” payable to Borrower pursuant to Section 2.1(b) of the RPI Agreement. “S&P” means Standard & Poor’s Ratings Group, a division of The McGraw Hill Corporation. “Sanctioned Entity” means (a) a country or territory or a government of a country or territory, (b) an agency of the government of a country or territory, (c) an organization directly or indirectly controlled by a country or territory or its government, or (d) a Person resident in or determined to be resident in a country or territory, in each case of clauses (a) through (d) that is a target of Sanctions, including a target of any country or territory sanctions program administered and enforced by OFAC. “Sanctioned Person” means, at any time (a) any Person named on the list of Specially Designated Nationals and Blocked Persons maintained by OFAC, OFAC’s consolidated Non-SDN list or any other Sanctions-related list maintained by any Governmental Authority, (b) a Person or legal entity that is a target of Sanctions, (c) any Person operating, organized or resident in a Sanctioned Entity, or (d) any Person directly or indirectly owned or controlled (individually or in the aggregate) by or acting on behalf of any such Person or Persons described in clauses (a) through (c) above. “Sanctions” means individually and collectively, respectively, any and all economic sanctions, trade sanctions, financial sanctions, sectoral sanctions, secondary sanctions, trade embargoes anti-terrorism laws and other sanctions laws, regulations or embargoes, including those imposed, administered or enforced

- 46 - from time to time by: (a) the United States of America, including those administered by OFAC, the U.S. Department of State, the U.S. Department of Commerce, or through any existing or future executive order, (b) the United Nations Security Council, (c) the European Union or any European Union member state, (d) His Majesty’s Treasury of the United Kingdom, or (e) any other Governmental Authority with jurisdiction over any Lender or any Loan Party or any of their respective Subsidiaries or Affiliates. “Secured Parties” has the meaning assigned to that term in the Pledge and Security Agreement. “Securities Account” means a securities account (as defined in the UCC). “Securities Act” means the Securities Act of 1933. “Solvency Certificate” means a Solvency Certificate substantially in the form of Exhibit E. “Solvent” means, with respect to any Loan Party, that as of the date of determination, both (a)(i) the sum of such Loan Party’s debt (including contingent liabilities) does not exceed the present fair saleable value of such Loan Party’s present assets, (ii) such Loan Party’s capital is not unreasonably small in relation to its business as contemplated on the Closing Date and reflected in the transactions contemplated by the Projections, and (iii) such Loan Party has not incurred and does not intend to incur, or believe (nor should it reasonably believe) that it will incur, debts beyond its ability to pay such debts as they become due (whether at maturity or otherwise) and (b) such Person is “solvent” within the meaning given that term and similar terms under applicable laws relating to fraudulent transfers and conveyances. For purposes of this definition, the amount of any contingent liability at any time shall be computed as the amount that, in light of all of the facts and circumstances existing at such time, represents the amount that can reasonably be expected to become an actual or matured liability (irrespective of whether such contingent liabilities meet the criteria for accrual under Statement of Financial Accounting Standard No. 5). “Specified Jurisdictions” means, as of any date of determination, the United States and the jurisdiction of organization or formation of a Loan Party. “Specified Transactions” means, with respect to any Pipeline Assets (other than Plozasiran), any Pipeline Asset Monetization transaction that is under negotiation prior to the Closing Date if (a) the transaction and all material economic terms thereof are identified by the Borrower to the Administrative Agent in writing prior to the Closing Date , (b) prior to entering into such transaction the Borrower shall have delivered to the Administrative Agent the final term sheet for such transaction, the terms of which shall be no less favorable to the Borrower than the terms previously disclosed to the Administrative Agent by the Borrower, and (c) [**]. “Sublicence Revenue” means any amounts (other than Royalties and Milestones) payable to Borrower or its Subsidiaries by a counterparty under a Product Agreement based on sublicenses granted by such counterparty to a Sublicensee under such Product Agreement as such amounts are defined under the equivalent definition included in such Product Agreement; provided that, for clarity, in the case of Fazirsiran, the term “Sublicense Revenue” shall have the meaning set forth in the Fazirsiran License Agreement. “Subsidiary” means, with respect to any Person, any corporation, company, partnership, limited liability company, association, joint venture or other business entity of which more than 50% of the total voting power of shares of stock, shares, or other ownership interests entitled (without regard to the occurrence of any contingency) to vote in the election of the Person or Persons (whether directors, managers, trustees or other Persons performing similar functions) having the power to direct or cause the direction of the management and policies thereof is at the time owned or controlled, directly or indirectly,

- 47 - by that Person or one or more of the other Subsidiaries of that Person or a combination thereof; provided, in determining the percentage of ownership interests of any Person controlled by another Person, no ownership interest in the nature of a “qualifying share” of the former Person shall be deemed to be outstanding. Notwithstanding anything to the contrary, for purposes of the Agreement, Visirna and its Subsidiaries and Calando Pharmaceuticals, Inc. shall be deemed not to be a Subsidiary of the Borrower or any Loan Party. “Survey” means a survey of any Real Property (and all improvements thereon) which is (a) (i) prepared by a surveyor or engineer licensed to perform surveys in the jurisdiction where such Real Property is located, (ii) dated (or redated) not earlier than six months prior to the date of delivery thereof unless there shall have occurred within six months prior to such date of delivery any material exterior construction on the site of such Real Property or any easement, right of way or other interest in the Real Property has been granted or become effective through operation of law or otherwise with respect to such Real Property which, in either case, can be depicted on a survey, in which events, as applicable, such survey shall be dated (or redated) after the completion of such construction or if such construction shall not have been completed as of such date of delivery, not earlier than [**] prior to such date of delivery, or after the grant or effectiveness of any such easement, right of way or other interest in the Real Property, (iii) certified by the surveyor (in a manner reasonably acceptable to Administrative Agent) to the Administrative Agent, and the Title Company, (iv) complying in all respects with the minimum detail requirements of the American Land Title Association as such requirements are in effect on the date of preparation of such survey and (v) sufficient for the Title Company to remove all standard survey exceptions from the title insurance policy relating to such Real Property and issue the endorsements of the type required hereunder. “Tax” means any present or future tax, levy, impost, duty, assessment, charge, fee, deduction or withholding (including backup withholding) or other charge imposed by any Governmental Authority, and any interest, penalties, additions to tax or other liabilities with respect thereto. “Term Loan” means, collectively, the Initial Term Loan and each Delayed Draw Term Loan. “Term Loan Commitment” means, collectively, the Initial Term Loan Commitment and the Delayed Draw Term Loan Commitments. “Term Loan Maturity Date” means the earlier of (a) August 7, 2031 and (b) the date that the Term Loan shall become due and payable in full hereunder, whether by acceleration or otherwise; provided, that, if such date is not a Business Day, the Term Loan Maturity Date shall be the immediately preceding Business Day. “Terminated Lender” has the meaning specified in Section 2.18. “Termination Date” means the date all Obligations (other than contingent obligations with respect to which no claim has been made) are paid in full and the expiration or termination of the Commitments of the Lenders under this Agreement. “Test Date” has the meaning specified in the definition of Excluded Subsidiary. “Threshold Amount” means $[**]. “Title Company” has the meaning specified in Section 5.11. “Title Policy” has the meaning specified in Section 5.11.

- 48 - “Total Delayed Draw Term Loan Commitment” means the sum of the amounts of the Lenders’ Delayed Draw Term Loan Commitments. “Total Initial Term Loan Commitment” means the sum of the amounts of the Lenders’ Initial Term Loan Commitments. “Trademarks” has the meaning ascribed to such term in the definition of “Intellectual Property Rights.” “True Up Payment” has the meaning specified in the Fee Letter. “U.S.” or “United States” means the United States of America (including all possessions and territories thereof). “U.S. Tax Compliance Certificate” has the meaning specified in Section 2.15(d)(i)(B)(3). “UCC” means the Uniform Commercial Code (or any similar or equivalent legislation) as in effect in any applicable jurisdiction. “Unpaid Interest” shall mean interest that is unpaid, including by the funding of a Delayed Draw Term Loan, or is otherwise not capitalized. “Visirna” means Visirna Therapeutics Inc. “VISIRNA JV Products” means the RNAi Molecules that are the subject of that certain License Agreement dated April 25, 2022, between Company and Visirna Therapeutics, Inc. and collectively are defined therein as the “Licensed Compounds” and “Licensed Products”, including [**], in the “Licensee Territory” as defined therein, and further including all forms (including salt forms), presentations, strengths, doses, and formulations (including any method of delivery), either alone or as a Combination Product[**]. “Visirna JV Documents” means that certain (i) License Agreement by and between Arrowhead Pharmaceuticals, Inc., a Delaware corporation and Visirna Therapeutics, Inc. dated as of April 25, 2022 (the “Visirna License Agreement”), (ii) Share Purchase Agreement by and among Visirna Therapeutics, Inc., Arrowhead Pharmaceuticals, Inc., Vivo Capital Fund IX (Cayman), L.P., and Vivo Innovation Fund II Holdings, L.P. entered into on April 25, 2022, (iii) Shareholders Agreement between Visirna Therapeutics, Inc., Arrowhead Pharmaceuticals, Inc., Vivo Capital Fund IX (Cayman), L.P., Vivo Innovation Fund II Holdings, L.P., and the other parties thereto from time to time, entered into as of April 25, 2022, (iv) Amended and Restated Memorandum of Association of Visirna Therapeutics, Inc., adopted by a special resolution passed on April 25, 2022, (v) Letter re: Management Rights from Visirna Therapeutics, Inc. to Vivo Capital Fund IX (Cayman), L.P. and Vivo Innovation Fund II Holdings, L.P., dated as of April 25, 2022, and (vi) Clinical Trial Collaboration Agreement by and between Visirna Therapeutics, Inc. and Arrowhead Pharmaceuticals, Inc. entered into as of May 9, 2024. “Visirna License Agreement” has the meaning set forth in the definition of “Visirna JV Documents”. “Weighted Average Life to Maturity” means, when applied to any Indebtedness at any date, the number of years obtained by dividing: (a) the sum of the products obtained by multiplying (i) the amount of each then remaining installment, sinking fund, serial maturity or other required payments of principal, including payment at final

- 49 - maturity, in respect of the Indebtedness, by (ii) the number of years (calculated to the nearest one-twelfth) that will elapse between such date and the making of such payment; by (b) the then outstanding principal amount of such Indebtedness. “Wisconsin Facility” has the meaning specified in the definition of Material Real Property. “Yield Maintenance Premium” has the meaning specified in the Fee Letter. “Zodasiran” means the pharmaceutical product candidate having the chemical structure set forth on Schedule 1.1(a), including all forms (including salt forms), presentations, strengths, doses, and formulations (including any method of delivery), either alone or as a Combination Product, and including all other products licensed or sublicensed to a third party under any Permitted Zodasiran Agreement. “Zodasiran Upfront Payment” has the meaning specified in Section 6.9(b)(xix). “Zodasiran Upfront Payment Balance” has the meaning specified in Section 2.10(f). Section 1.2 Accounting and Other Terms. (a) Except as otherwise expressly provided herein, all accounting terms not otherwise defined herein shall have the meanings assigned to them in conformity with GAAP. Financial statements and other information required to be delivered by Borrower to Lenders pursuant to Sections 5.1(b) and 5.1(c) shall be prepared in accordance with GAAP as in effect at the time of such preparation. Subject to the foregoing, calculations in connection with the definitions, covenants and other provisions hereof shall utilize accounting principles and policies in conformity with those used to prepare the Historical Financial Statements. Notwithstanding the foregoing, for purposes of determining compliance with any covenant (including the computation of any financial covenant) contained herein, (i) Indebtedness of Borrower and its Subsidiaries shall be deemed to be carried at 100% of the outstanding principal amount thereof, and the effects of FASB ASC 825 and FASB ASC 470 20 on financial liabilities shall be disregarded, (ii) with respect to the accounting for leases as either operating leases or capital leases and the impact of such accounting in accordance with FASB ASC 840 on the definitions and covenants herein, GAAP as in effect on December 31, 2018 shall be applied and (iii) with respect to revenue recognition and the impact of such accounting in accordance with FASB ASC 606 on the definitions and covenants herein, GAAP as in effect on December 31, 2017 shall be applied. (b) All terms used in this Agreement which are defined in Article 8 or Article 9 of the UCC as in effect from time to time in the State of New York and which are not otherwise defined herein shall have the same meanings herein as set forth therein, provided that terms used herein which are defined in the UCC as in effect in the State of New York on the date hereof shall continue to have the same meaning notwithstanding any replacement or amendment of such statute except as Administrative Agent may otherwise determine. (c) For purposes of determining compliance with any incurrence or expenditure tests set forth in this Agreement, any amounts so incurred or expended (to the extent incurred or expended in a currency other than Dollars ($)) shall be converted into Dollars on the basis of the exchange rates (as shown on the Bloomberg currency page for such currency or, if the same does not provide such exchange rate, by reference to such other recognized and publicly available service for displaying exchange rates as may be reasonably selected by Administrative Agent or, in the event no such service is available, on such other basis as is reasonably satisfactory to Administrative Agent) as in effect on the date of such incurrence or expenditure under any provision of any such Section that has an aggregate Dollar limitation provided for

- 50 - therein (and to the extent the respective incurrence or expenditure test regulates the aggregate amount outstanding at any time and it is expressed in terms of Dollars, all outstanding amounts originally incurred or spent in currencies other than Dollars shall be converted into Dollars on the basis of the exchange rates (as shown on the Bloomberg currency page for such currency or, if the same does not provide such exchange rate, by reference to such other recognized and publicly available service for displaying exchange rates as may be reasonably selected by Administrative Agent or, in the event no such service is available, on such other basis as is reasonably satisfactory to Administrative Agent) as in effect on the date of any new incurrence or expenditures made under any provision of any such Section that regulates the Dollar amount outstanding at any time). Section 1.3 Interpretation, Etc. Any of the terms defined herein may, unless the context otherwise requires, be used in the singular or the plural, depending on the reference. Whenever the context may require, any pronoun shall include the corresponding masculine, feminine, and neuter forms. The word “will” shall be construed to have the same meaning and effect as the word “shall.” References herein to any Section, Appendix, Schedule or Exhibit shall be to a Section, an Appendix, a Schedule or an Exhibit, as the case may be, hereof unless otherwise specifically provided. The use herein of the word “include” or “including,” when following any general statement, term or matter, shall not be construed to limit such statement, term or matter to the specific items or matters set forth immediately following such word or to similar items or matters, whether or not no limiting language (such as “without limitation” or “but not limited to” or words of similar import) is used with reference thereto, but rather shall be deemed to refer to all other items or matters that fall within the broadest possible scope of such general statement, term or matter. The words “asset” and “property” shall be construed to have the same meaning and effect and to refer to any right or interest in or to assets and properties of any kind whatsoever, whether real, personal or mixed and whether tangible or intangible. Any reference herein or in any other Loan Document to the satisfaction, repayment, or payment in full of the Obligations or Guaranteed Obligations shall mean (a) the payment or repayment in full in immediately available funds of (i) the principal amount of, and interest accrued and unpaid with respect to, all outstanding Loans, together with the payment of any premium applicable to the repayment of the Loans, including any MOIC or Yield Maintenance Premium, (ii) all costs, expenses, or indemnities payable pursuant to Section 10.2 or Section 10.3 of this Agreement that have accrued and are unpaid regardless of whether demand has been made therefor, and (iii) all fees, charges (including loan fees, service fees, professional fees, and expense reimbursement) and other Obligations that have accrued hereunder or under any other Loan Document and are unpaid, (b) the receipt by Administrative Agent of cash collateral in order to secure any other contingent Obligations for which a claim or demand for payment has been made on or prior to such time or in respect of matters or circumstances known to the Administrative Agent or a Lender at such time that are reasonably expected to result in any loss, cost, damage, or expense (including attorneys’ fees and legal expenses), such cash collateral to be in such amount as the Administrative Agent reasonably determines is appropriate to secure such contingent Obligations, and (c) the termination of all of the Term Loan Commitments. Notwithstanding anything in this Agreement to the contrary, (A) the Xxxx-Xxxxx Xxxx Street Reform and Consumer Protection Act and all requests, rules, guidelines or directives thereunder or issued in connection therewith and (B) all requests, rules, guidelines or directives concerning capital adequacy promulgated by the Bank for International Settlements, the Basel Committee on Banking Supervision (or any successor or similar authority) or the United States or foreign regulatory authorities shall, in each case, be deemed to be enacted, adopted, issued, phased in or effective after the date of this Agreement regardless of the date enacted, adopted, issued, phased in or effective. Unless the context requires otherwise (a) any definition of or reference to any Loan Document, agreement, instrument or other document herein shall be construed as referring to such agreement, instrument or other document as from time to time amended, supplemented or otherwise modified (subject to any restrictions on such amendments, supplements or modifications set forth in any Loan Document), (b) any reference to any law or regulation shall (i) include all statutory and regulatory provisions consolidating, amending, replacing or interpreting or supplementing such law or regulation, and (ii) unless otherwise specified, refer to such law or regulation as amended, modified or

- 51 - supplemented from time to time, (c) any reference herein to any Person shall be construed to included such Person’s successors and permitted assigns and (d) any reference to “on behalf of” with respect to any payments to the Borrower, any Loan Party or any Subsidiary of the Borrower, shall mean a payment made to any agent or representative of such Person (and not, for the avoidance of doubt, the counterparty to any contract or agreement). This Section 1.3 shall apply, mutatis mutandis, to all Loan Documents. Section 1.4 Time References. Unless otherwise indicated herein, all references to time of day refer to Eastern Standard Time or Eastern daylight saving time, as in effect in New York City on such day. For purposes of the computation of a period of time from a specified date to a later specified date, the word “from” means “from and including” and the words “to” and “until” each means “to but excluding”; provided, however, that with respect to a computation of fees or interest payable to Administrative Agent or any Lender, such period shall in any event consist of at least one full day. Whenever any action or delivery to be taken or made under this Agreement or any other Loan Document shall be stated to be due on a day other than a Business Day, such action or delivery shall be deemed to be due on the next succeeding Business Day; provided, however, that any notices relating to any defaults, Events of Default or remedial actions associated therewith shall be deemed to have been received and/or to occur immediately upon receipt by the intended recipient. Section 1.5 Certain Matters of Construction. References in this Agreement to “determination” by Administrative Agent include good faith estimates by Administrative Agent (in the case of quantitative determinations) and good faith beliefs by Administrative Agent (in the case of qualitative determinations). A Default or Event of Default shall be deemed to exist at all times during the period commencing on the date that such Default or Event of Default occurs to the date on which such Default or Event of Default is waived in writing pursuant to this Agreement or, in the case of a Default, is cured within any period of cure expressly provided for in this Agreement; and an Event of Default shall “continue” or be “continuing” until such Event of Default has been waived in writing by the Required Lenders. Any Lien referred to in this Agreement or any other Loan Document as having been created in favor of Administrative Agent, any agreement entered into by Administrative Agent pursuant to this Agreement or any other Loan Document, any payment made by or to or funds received by Administrative Agent pursuant to or as contemplated by this Agreement or any other Loan Document, or any act taken or omitted to be taken by Administrative Agent, shall, unless otherwise expressly provided, be created, entered into, made or received, or taken or omitted, for the benefit or account of Administrative Agent and the Lenders. Wherever the phrase “to the knowledge of any Loan Party” or words of similar import relating to the knowledge or the awareness of any Loan Party are used in this Agreement or any other Loan Document, such phrase shall mean and refer to (i) the actual knowledge of a senior officer of any Loan Party or (ii) the knowledge that a senior officer would have obtained if such officer had engaged in good faith and diligent performance of such officer’s duties, including the making of such reasonably specific inquiries as may be necessary of the employees or agents of such Loan Party and a good faith attempt to ascertain the existence or accuracy of the matter to which such phrase relates. All covenants hereunder shall be given independent effect so that if a particular action or condition is not permitted by any of such covenants, the fact that it would be permitted by an exception to, or otherwise within the limitations of, another covenant shall not avoid the occurrence of a default if such action is taken or condition exists. In addition, all representations and warranties hereunder shall be given independent effect so that if a particular representation or warranty proves to be incorrect or is breached, the fact that another representation or warranty concerning the same or similar subject matter is correct or is not breached will not affect the incorrectness of a breach of a representation or warranty hereunder.

- 53 - (B) shall be entitled to rely conclusively on any Authorized Officer’s authority to request a Term Loan on behalf of Company until Administrative Agent receives written notice to the contrary, and (C) shall have no duty to verify the authenticity of the signature appearing on any written Funding Notice. (ii) Each Lender shall make its applicable Term Loan available to Administrative Agent not later than 12:00 p.m. on the applicable Credit Date, by wire transfer of same day funds in Dollars, at Administrative Agent’s Principal Office. Upon satisfaction or waiver of the conditions precedent specified herein, Administrative Agent shall make the proceeds of the applicable Term Loans available to Company on the applicable Credit Date by causing an amount of same day funds in Dollars equal to the proceeds of all such Loans received by Administrative Agent from Lenders to be wired to the account of Company at Administrative Agent’s Principal Office or to such other account as may be designated in writing to Administrative Agent by Company in the applicable Funding Notice. (iii) During the Delayed Draw Commitment Period, drawings under the Delayed Draw Term Loan Commitments shall (A) not be made more than once in any Fiscal Quarter on each Interest Payment Date and (B) be applied solely to pay interest on the Loans. The Administrative Agent shall provide notice to the Borrower that the Initial Delayed Draw Term Loans have been funded. (iv) With respect to any Funding Notice requesting Incremental Term Loans, (i) the Administrative Agent shall promptly forward such Funding Notice to each Lender and (ii) each Lender shall, within fifteen (15) Business Days of receipt of such Funding Notice, elect or decline to commit, on the applicable Credit Date, to provide its Pro Rata Share of such Term Loans. During such fifteen (15) Business Day period, the Borrower shall provide to the Administrative Agent, for distribution to the Lenders, such information as reasonably requested by the Lenders, including, without limitation any information related to the use of funds of such Incremental Term Loans. The making of any Incremental Term Loans will be subject to entering into an amendment to this Agreement that is reasonably acceptable to the Borrower and the Administrative Agent. (c) Pro Rata Shares; Availability of Funds. (i) Pro Rata Shares. All Loans (other than the Incremental Term Loans) shall be made by Lenders simultaneously and proportionately to their respective Pro Rata Shares, it being understood that no Lender shall be responsible for any default by any other Lender in such other Lender’s obligation to make a Loan requested hereunder nor shall any Term Loan Commitment of any Lender be increased or decreased as a result of a default by any other Lender in such other Lender’s obligation to make a Loan requested hereunder or purchase a participation required hereby. (ii) Availability of Funds. Unless Administrative Agent shall have been notified by any Lender in writing prior to the applicable Credit Date that such Lender does not intend to make available to Administrative Agent the amount of such Xxxxxx’s Loan requested on such Credit Date, Administrative Agent may assume that such Lender has made such amount available to Administrative Agent on such Credit Date and Administrative Agent may, in its reasonable discretion, but shall not be obligated to, make available to Company a corresponding amount on such Credit Date. If such corresponding amount is not in fact made available to Administrative Agent by such Xxxxxx, Administrative Agent shall be entitled to recover such corresponding amount on demand from such Lender together with interest thereon, for each day from such Credit Date until the date such amount is paid to Administrative Agent, at the customary rate set by Administrative Agent for the correction of errors among banks for three Business Days and thereafter at the Prime Rate. If such Lender does not pay such corresponding amount forthwith upon Administrative Agent’s demand therefor, Administrative Agent shall promptly notify Company and Company shall immediately pay such corresponding amount to Administrative Agent together with interest thereon, for each day from such Credit Date until the date such amount is paid to

- 55 - (b) Interest payable hereunder shall be computed on the basis of a 360 day year, in each case for the actual number of days elapsed in the period during which it accrues. In computing interest on any Loan, the date of the making of such Loan applicable to such Loan, and the date of payment of such Loan shall be excluded; provided, if a Loan is repaid on the same day on which it is made, one day’s interest shall be paid on that Loan. (c) Except as otherwise set forth herein, interest on each Term Loan shall be payable in arrears (i) on each Interest Payment Date and (ii) on the Term Loan Maturity Date; provided that, (A) interest accrued pursuant to Section 2.6 shall be payable on demand and (B) in the event of any repayment or prepayment of any Term Loan, accrued interest and any additional amounts payable pursuant to the terms of the Fee Letter shall be payable on the date of such repayment or prepayment. Section 2.5 [Reserved]. Section 2.6 Default Interest. Upon the occurrence and during the continuance of an Event of Default under Sections 8.1(a), (f) or (g), and after notice from the Administrative Agent acting at the direction of the Required Lenders, after the occurrence and during the continuance of any other Event of Default retroactive to the date of occurrence of such Event of Default, the principal amount of all Term Loans outstanding and, to the extent permitted by applicable law, any interest payments on the Term Loans or any fees or other amounts owed hereunder (including any MOIC or Yield Maintenance Premium), shall thereafter bear interest (including post petition interest in any proceeding under the Bankruptcy Code or other applicable bankruptcy laws) payable on demand at a rate that is [**]% per annum in excess of the interest rate otherwise payable hereunder with respect to the Term Loans (the “Default Rate”). All interest payable at the Default Rate shall be payable in cash on demand. Payment or acceptance of the Default Rate of interest provided for in this Section 2.6 is not a permitted alternative to timely payment and shall not constitute a waiver of any Default or Event of Default or otherwise prejudice or limit any rights or remedies of Administrative Agent or any Lender. Section 2.7 Fees. (a) Company agrees to pay to Administrative Agent all fees payable by it in the Fee Letter in the amounts and at the times specified therein. (b) All fees referred to in Section 2.7(a) shall be calculated on the basis of a 360 day year and the actual number of days elapsed. Section 2.8 Repayment of Term Loans. The principal amounts of the Term Loans shall be repaid, together with all other amounts owed hereunder with respect thereto, in full in cash no later than the Term Loan Maturity Date. Section 2.9 Voluntary Prepayments and Commitment Reductions. (a) Voluntary Prepayments. (i) Subject to the terms of the Fee Letter, Company may prepay at any time the Term Loan on any Business Day in whole or in part, in an aggregate minimum amount of $1,000,000 (or the remaining balance of the Term Loans if less) and integral multiples of $1,000,000 in excess of that amount. (ii) All such prepayments shall be made (A) upon not less than three (3) Business Days’ prior written notice given to Administrative Agent by 10:00 a.m. on the date required (and

- 56 - Administrative Agent will promptly transmit such or original notice by facsimile or email to each Lender). Upon the giving of any such notice, the principal amount of the Term Loans specified in such notice shall become due and payable on the prepayment date specified therein; provided, that any notice of prepayment may be conditioned upon the effectiveness of other credit facilities or any other financing, disposition, sale or other transaction. Any such voluntary prepayment shall be applied as specified in Section 2.11(a) with respect to the Term Loans. (b) Voluntary Commitment Reductions. (i) Company may, upon not less than three Business Days’ prior written notice confirmed in writing to Administrative Agent (which written notice Administrative Agent will promptly transmit by facsimile or email to each applicable Lender), at any time and from time to time terminate in whole or permanently reduce in part any unused portion of the Delayed Draw Term Loan Commitments; provided, any such partial reduction of the Delayed Draw Term Loan Commitments shall be in an aggregate minimum amount of $1,000,000 (or the remaining balance of the Commitments if less) and integral multiples of $1,000,000 in excess of that amount. (i) Company’s notice to Administrative Agent shall designate the date (which shall be a Business Day) of such termination or reduction and the amount of any partial reduction, and such termination or reduction of the Delayed Draw Term Loan Commitments shall be effective on the date specified in Company’s notice and shall reduce the Delayed Draw Term Loan of each Lender proportionately to its Pro Rata Share thereof; provided, that any notice of termination or reduction may be conditioned upon the effectiveness of other credit facilities or any other financing, disposition, sale or other transaction. (ii) In addition to the foregoing, the Administrative Agent may, at any time and from time to time, reduce the Total Delayed Draw Term Loan Commitment (and the Delayed Draw Term Loan Commitment of each Lender) to an amount which remains sufficient to pay all interest for the remaining term of the Agreement, calculated as of the date of any such reduction. Section 2.10 Mandatory Prepayments. (a) [Reserved]. (b) Insurance/Condemnation Proceeds. No later than the [**] following the date of receipt by any Loan Party of any Net Proceeds from insurance payment or any condemnation, taking or other casualty event in excess of $[**] in the aggregate in any Fiscal Year, Company shall prepay the Term Loan as set forth in Section 2.11(a) in an aggregate amount equal to such Net Proceeds in excess of $[**]; provided, (i) so long as no Default or Event of Default shall have occurred and be continuing, (ii) Company has delivered Administrative Agent prior written notice of Company’s intention to apply such Net Proceeds (the “Reinvestment Amounts”) to the costs of research, development, manufacturing, Commercialization, license, purchase, or other acquisition or investment of or in other assets or Products used or useful in the business of the Loan Parties, including working capital, capital expenditures and Permitted Acquisitions (the “Permitted Reinvestment Purposes”), (iii) the monies are held in a Deposit Account or Securities Account in which the Administrative Agent has a perfected first-priority security interest, and (iv) the Loan Parties complete such cost payment, reinvestment or purchase within [**] after the initial receipt of such monies, the Loan Parties shall have the option to apply such Reinvestment Amounts to any Permitted Reinvestment Purposes in an aggregate amount not to exceed (1) $[**] in respect of any individual event and (2) $[**] in the aggregate during the term of this Agreement; provided, that if any such Net Proceeds are no longer intended to be or cannot be so reinvested during the applicable [**] period, an amount equal to any such Net Proceeds shall be applied within [**] after Borrower reasonably determines that such Net

- 59 - amount of the Initial Term Loan, the Pipeline Percentage shall be reduced to [**]% of such Net Proceeds and (B) if, on the date of closing of such Pipeline Asset Monetization, the Company has Qualified Cash in excess of $[**], the Lenders have earned and been paid (without (a) receipt of the True Up Payment or (b) including any optional prepayment pursuant to Section 2.9(a)(i) in such calculation) an amount equal to or greater than a MOIC of [**] times the principal amount of the Initial Term Loan, the Pipeline Percentage shall be reduced to [**]% of such Net Proceeds. For the avoidance of doubt, any Asset Sale of Plozasiran, any Asset Sale of Zodasiran and any upfront fee received in connection with a Specified Transaction shall not be subject to this Section 2.10(h). (i) Other Products. (A) With respect to any Product (excluding (i) Plozasiran, (ii) Zodasiran, (iii) any Partnered Asset and (iv) any amounts received in connection with transactions for which prepayments are required to be made and are made pursuant to Section 2.10(e) through (h) above and clause (j) below), no later than [**] following the last day of each Fiscal Quarter following the Closing Date (or if later, within [**] following the end of the month during which the relevant payments are received), Company shall prepay the Term Loan as set forth in Section 2.11(a) in an amount equal to [**]% of Global Net Sales of such Product for such Fiscal Quarter. (B) With respect to third party products manufactured by the Loan Parties solely on a contract manufacturing basis for a third party that is not a Licensee, an amount equal to [**]% of net revenue received by a Loan Party in connection with such manufacture within [**] following the end of the calendar month in which such net revenue is received. (j) Royalty Reductions and Milestone Reductions. If a counterparty to the Takeda License Agreement exercises any Reduction against any payment of any Royalties, Milestones, Sublicense Revenue, Profit Share Amounts or Joint Venture Proceeds, other than for a Permitted Reduction, Borrower shall promptly (and in any event within [**] following receipt of the royalty report or other report affected by such Reduction) make a true-up payment to the Administrative Agent such that the Administrative Agent receives the full amount of the Royalties, Milestones, Sublicense Revenue, Profit Share Amounts and Joint Venture Proceeds that would have been payable to the Administrative Agent had such Reduction not occurred. (k) Prepayment Certificate. Concurrently with any prepayment of the Term Loan pursuant to Section 2.10(a) through Section 2.10(j), Company shall deliver to Administrative Agent a certificate of an Authorized Officer demonstrating the calculation of the amount of the applicable proceeds and compensation owing to Lenders pursuant to the Fee Letter, if any, as the case may be. In the event that Company shall subsequently determine that the actual amount received exceeded the amount set forth in such certificate, Company shall promptly make an additional prepayment of the Loans, and Company shall concurrently therewith deliver to Administrative Agent a certificate of an Authorized Officer demonstrating the derivation of such excess. Section 2.11 Application of Prepayments. (a) Application of Prepayments of Term Loans. (i) Any prepayment of the Term Loan pursuant to Section 2.9 and (ii) so long as no Application Event has occurred and is continuing, any mandatory prepayment of any Loan pursuant to Section 2.10, in each case, shall be applied as follows: first, (i) if the prepayment will not result in a full prepayment of all outstanding Term Loans, ratably to prepay the principal of the Term Loan and (ii) if the prepayment will result in a full prepayment of all outstanding Term Loans, ratably to prepay the principal of the Term Loans, together with any fees payable under the Fee Letter relating to such prepayment, until paid in full; second, to prepay accrued and Unpaid Interest on the Term Loan;

- 60 - (b) [Reserved]. (c) At any time an Application Event has occurred and is continuing, all payments shall be applied pursuant to Section 2.12(f). Nothing contained herein shall modify the provisions of Section 2.12(b) regarding the requirement that all prepayments be accompanied by accrued interest and fees on the principal amount being prepaid to the date of such prepayment and the applicable MOIC or Yield Maintenance Premium, or any requirement otherwise contained herein to pay all other amounts as the same become due and payable. Section 2.12 General Provisions Regarding Payments. (a) All payments by Company of principal, interest, fees and other Obligations shall be made in Dollars in immediately available funds, without defense, recoupment, setoff or counterclaim, free of any restriction or condition, and delivered to Administrative Agent, for the account of Lenders, not later than 3:00 p.m. (New York City time) on the date such payment is due and payable to Administrative Agent’s Account. Funds received by Administrative Agent after that time on such due date shall be deemed to have been paid by Company on the next Business Day. (b) All payments in respect of the principal amount of any Term Loan shall be accompanied by payment of accrued interest on the principal amount being repaid or prepaid, the MOIC, the Yield Maintenance Premium and all commitment fees and other amounts payable with respect to the principal amount being repaid or prepaid. (c) Administrative Agent shall promptly distribute to each Lender at such address as such Lender shall indicate in writing, such Lender’s applicable Pro Rata Share of all payments and prepayments of principal and interest due hereunder, together with all other amounts due with respect thereto, including, without limitation, all fees payable with respect thereto, to the extent received by Administrative Agent. (d) Whenever any payment to be made hereunder shall be stated to be due on a day that is not a Business Day, such payment shall be made on the next succeeding Business Day and such extension of time shall be included in the computation of the payment of interest hereunder or of the commitment fees hereunder. (e) Administrative Agent shall deem any payment by or on behalf of Company hereunder that is not made in same day funds prior to 3:00 p.m. to be a non-conforming payment. Any such payment shall not be deemed to have been received by Administrative Agent until the later of (i) the time such funds become available funds, and (ii) the applicable next Business Day. Administrative Agent shall give prompt notice to Company and each applicable Lender (confirmed in writing) if any payment is non-conforming. Interest shall continue to accrue on any principal as to which a non-conforming payment is made until such funds become available funds (but in no event less than the period from the date of such payment to the next succeeding applicable Business Day) at the Default Rate determined pursuant to Section 2.6 from the date such amount was due and payable until the date such amount is paid in full. (f) At any time an Application Event has occurred and is continuing, or the maturity of the Obligations shall have been accelerated pursuant to Section 8.2, all payments or proceeds received by Administrative Agent hereunder or under any Collateral Document in respect of any of the Obligations, including, but not limited to all proceeds received by Administrative Agent in respect of any sale, any collection from, or other realization upon all or any part of the Collateral, shall be applied in full or in part as follows:

- 61 - first, ratably to pay the Obligations in respect of any fees (other than any Yield Maintenance Premium), expense reimbursements, indemnities and other amounts then due and payable to Administrative Agent until paid in full; second, ratably to pay interest then due and payable in respect of Protective Advances until paid in full; third, ratably to pay principal of Protective Advances then due and payable until paid in full; fourth, ratably to pay the Obligations in respect of any fees (other than any Yield Maintenance Premium) and indemnities then due and payable to the Lenders with a Term Loan Commitment until paid in full; fifth, ratably to pay interest then due and payable in respect of the Term Loan until paid in full; sixth, ratably to pay the principal of the Term Loan until paid in full; seventh, ratably to pay the Obligations in respect of any Yield Maintenance Premium then due and payable to the Lenders with a Term Loan until paid in full; and eighth, to the ratable payment of all other Obligations then due and payable until paid in full. (g) For purposes of Section 2.12(f) (other than clause eighth of Section 2.12(f)), “paid in full” means payment in cash of all amounts owing under the Loan Documents according to the terms thereof, including loan fees, service fees, professional fees, interest (and specifically including interest accrued after the commencement of any Insolvency Proceeding), default interest, interest on interest, and expense reimbursements, whether or not same would be or is allowed or disallowed in whole or in part in any Insolvency Proceeding, except to the extent that default or overdue interest (but not any other interest) and loan fees, each arising from or related to a default, are disallowed in any Insolvency Proceeding; provided, however, that for purposes of clause eighth of Section 2.12(f), “paid in full” means payment in cash of all amounts owing under the Loan Documents according to the terms thereof, including loan fees, service fees, professional fees, interest (and specifically including interest accrued after the commencement of any Insolvency Proceeding), default interest, interest on interest, and expense reimbursements, whether or not the same would be or is allowed or disallowed in whole or in part in any Insolvency Proceeding. (h) In the event of a direct conflict between the priority provisions of Section 2.12(f) and other provisions contained in any other Loan Document, it is the intention of the parties hereto that both such priority provisions in such documents shall be read together and construed, to the fullest extent possible, to be in concert with each other. In the event of any actual, irreconcilable conflict that cannot be resolved as aforesaid, the terms and provisions of Section 2.12(f) shall control and govern. (i) The Lenders and Company hereby authorize Administrative Agent to, and Administrative Agent may, from time to time during the continuance of an Event of Default, charge the Loan Account with any amount due and payable by Company under any Loan Document to the extent not paid when due. Each of the Lenders and Company agrees that Administrative Agent shall have the right to make such charges whether or not any of the conditions precedent in Section 3.2 have been satisfied. Any amount charged to the Loan Account shall be deemed a Loan hereunder made by the Lenders to Company, funded by Administrative Agent on behalf of the Lenders and subject to Section 2.2. The Lenders and

- 62 - Company confirm that any charges which Administrative Agent may so make to the Loan Account as herein provided will be made as an accommodation to Company and solely at Administrative Agent’s discretion, provided that Administrative Agent shall from time to time upon the request of Administrative Agent, charge the Loan Account of Company with any amount due and payable under any Loan Document. The Administrative Agent shall provide a reasonably detailed invoice for any amounts charged to the Loan Account (unless such charge is made at the Company’s request) promptly upon request by the Company. Section 2.13 Ratable Sharing. Lenders hereby agree among themselves that, except as otherwise provided in the Collateral Documents with respect to amounts realized from the exercise of rights with respect to Liens on the Collateral, if any of them shall, whether by voluntary payment (other than a voluntary prepayment of Term Loans made and applied in accordance with the terms hereof), through the exercise of any right of set off or banker’s lien, by counterclaim or cross action or by the enforcement of any right under the Loan Documents or otherwise, or as adequate protection of a deposit treated as cash collateral under the Bankruptcy Code, receive payment or reduction of a proportion of the aggregate amount of principal, interest, fees and other amounts then due and owing to such Lender hereunder or under the other Loan Documents (collectively, the “Aggregate Amounts Due” to such Lender) which is greater than the proportion received by any other Lender in respect of the Aggregate Amounts Due to such other Lender having Term Loans, then the Lender receiving such proportionately greater payment shall (a) notify Administrative Agent and each other Lender of the receipt of such payment and (b) apply a portion of such payment to purchase participations (which it shall be deemed to have purchased from each seller of a participation simultaneously upon the receipt by such seller of its portion of such payment) in the Aggregate Amounts Due to the other Lenders so that all such recoveries of Aggregate Amounts Due shall be shared by all Lenders having Term Loans in proportion to the Aggregate Amounts Due to them; provided, if all or part of such proportionately greater payment received by such purchasing Lender is thereafter recovered from such Lender upon the bankruptcy or reorganization of Company or otherwise, those purchases shall be rescinded and the purchase prices paid for such participations shall be returned to such purchasing Lender ratably to the extent of such recovery, but without interest. Company expressly consents to the foregoing arrangement and agrees that any holder of a participation so purchased may exercise any and all rights of banker’s lien, set off or counterclaim with respect to any and all monies owing by Company to that holder with respect thereto as fully as if that holder were owed the amount of the participation held by that holder. Section 2.14 Increased Costs; Capital Adequacy. (a) Compensation For Increased Costs and Taxes. Subject to the provisions of Section 2.15 (which shall be controlling with respect to the matters covered thereby), in the event that Administrative Agent or any Lender shall determine (which determination shall, absent manifest error, be final and conclusive and binding upon all parties hereto) that any law, treaty or governmental rule, regulation or order, or any change therein or in the interpretation, administration or application thereof (including the introduction of any new law, treaty or governmental rule, regulation or order), or any determination of a court or Governmental Authority, in each case that becomes effective after the date hereof, or compliance by Administrative Agent or such Lender with any guideline, request or directive issued or made after the date hereof by any central bank or other governmental or quasi-Governmental Authority (whether or not having the force of law): (i) subjects Administrative Agent or such Lender (or its applicable lending office) to any additional Tax (other than (A) Indemnified Taxes, (B) Taxes described in clauses (ii) through (iv) of the definition of Excluded Taxes and (C) Connection Income Taxes) with respect to this Agreement or any of the other Loan Documents or any of its obligations hereunder or thereunder or any payments to Administrative Agent or such Lender (or its applicable lending office) of principal, interest, fees or any other amount payable hereunder; (ii) imposes, modifies or holds applicable any reserve (including any marginal, emergency, supplemental, special or other reserve), special deposit, compulsory loan, FDIC insurance or similar requirement against assets held by, or deposits or other liabilities in or for the account of, or advances or loans by, or other credit extended by, or any other

- 63 - acquisition of funds by, any office of Administrative Agent or such Lender; or (iii) imposes any other condition (other than with respect to Taxes) on or affecting Administrative agent or such Lender (or its applicable lending office) or its obligations hereunder; and the result of any of the foregoing is to increase the cost to Administrative Agent or such Lender of agreeing to make, making or maintaining Loans hereunder or to reduce any amount received or receivable by Administrative Agent or such Lender (or its applicable lending office) with respect thereto; then, in any such case, Company shall promptly pay to Administrative Agent or such Lender, upon receipt of the statement referred to in the next sentence, such additional amount or amounts (in the form of an increased rate of, or a different method of calculating, interest or otherwise as Administrative Agent or such Lender in its reasonable discretion shall determine) as may be necessary to compensate Administrative Agent or such Lender for any such increased cost or reduction in amounts received or receivable hereunder. Administrative Agent or such Lender shall deliver to Company (with a copy to Administrative Agent, if applicable) a written statement, setting forth in reasonable detail the basis for calculating the additional amounts owed to Administrative Agent or such Lender under this Section 2.14(a), which statement shall be conclusive and binding upon all parties hereto absent manifest error. (b) Capital Adequacy Adjustment. In the event that any Lender shall have determined that the adoption, effectiveness, phase in or applicability after the Closing Date of any law, rule or regulation (or any provision thereof) regarding capital adequacy, or any change therein or in the interpretation or administration thereof by any Governmental Authority, central bank or comparable agency charged with the interpretation or administration thereof, or compliance by any Lender (or its applicable lending office) with any guideline, request or directive regarding capital adequacy (whether or not having the force of law) of any such Governmental Authority, central bank or comparable agency, has or would have the effect of reducing the rate of return on the capital of such Lender or any corporation controlling such Lender as a consequence of, or with reference to, such Lender’s Term Loans or other obligations hereunder with respect to the Term Loan to a level below that which such Lender or such controlling corporation could have achieved but for such adoption, effectiveness, phase in, applicability, change or compliance (taking into consideration the policies of such Lender or such controlling corporation with regard to capital adequacy), then from time to time, within [**] after receipt by Company from such Lender of the statement referred to in the next sentence, Company shall pay to such Lender such additional amount or amounts as will compensate such Lender or such controlling corporation on an after tax basis for such reduction. Such Lender shall deliver to Company (with a copy to Administrative Agent) a written statement, setting forth in reasonable detail the basis for calculating the additional amounts owed to Lender under this Section 2.14(b), which statement shall be conclusive and binding upon all parties hereto absent manifest error. Section 2.15 Taxes; Withholding, Etc. (a) Withholding of Taxes. All sums payable by any Loan Party hereunder and under the other Loan Documents shall (except to the extent required by law) be paid free and clear of, and without any deduction or withholding on account of, any Tax, other than (i) Taxes imposed on or measured by the recipient’s net income (however denominated), branch profits Taxes and franchise Taxes imposed on the recipient, in each case, (A) by the jurisdiction (or any political subdivision thereof) under the laws of which such recipient is organized or in which its principal office is located or, in the case of any Lender, in which its applicable lending office is located or (B) as the result of any other present or former connection between such recipient and the jurisdiction imposing such Tax (other than connections arising from such recipient having executed, delivered, become a party to, performed its obligations under, received payments under, received or perfected a security interest under, engaged in any other transaction pursuant to or enforced any Loan Document) (all such Taxes described in clause (B), “Other Connection Taxes”), (ii) in the case of a Lender, U.S. federal withholding Taxes imposed on amounts payable to or for the account of such Lender with respect to an applicable interest in a Loan or commitment hereunder pursuant to a law in effect on the date on which (x) such Lender acquires such interest in the Loan or commitment hereunder (other than

- 64 - pursuant to an assignment request by the Borrower under Section 2.18) or (y) such Lender changes its lending office, except in each case to the extent that, pursuant to this Section 2.15, amounts with respect to such Taxes were payable either to such Lender’s assignor immediately before such Lender became a party hereto or to such Lender immediately before it changed its lending office, (iii) Taxes attributable to such Lender’s failure to comply with Section 2.15(d) and (iv) any withholding Taxes imposed under FATCA (all such Taxes described in clauses (i) through (iv), collectively or individually, “Excluded Taxes”). If any Loan Party or any other Person is required by law to make any deduction or withholding on account of any Tax from any sum paid or payable by any Loan Party to Administrative Agent or any Lender under any of the Loan Documents: (1) Company shall notify Administrative Agent of any such requirement or any change in any such requirement as soon as Company becomes aware of it; (2) Company shall timely pay the full amount of any such Tax to the relevant Governmental Authority before the date on which penalties attach thereto, such payment to be made (if the liability to pay is imposed on any Loan Party) for its own account or (if that liability is imposed on Administrative Agent or such Lender, as the case may be) on behalf of and in the name of Administrative Agent or such Lender; (3) if such Tax is an Indemnified Tax, then the sum payable by such Loan Party shall be increased to the extent necessary to ensure that, after the making of that deduction, withholding or payment (including any such deductions, withholdings or payments applicable to additional sums payable under this Section 2.15), Administrative Agent or such Lender, as the case may be, receives on the due date a net sum equal to what it would have received had no such deduction, withholding or payment been required or made; and (4) within [**] after paying any sum from which it is required by law to make any deduction or withholding, Company shall deliver to Administrative Agent the original or a certified copy of a receipt issued by such Governmental Authority evidencing such deduction, withholding or payment, a copy of the return reporting such withholding, deduction or payment, or other evidence satisfactory to Administrative Agent of such deduction, withholding or payment and of the remittance thereof to the relevant Governmental Authority. (b) Other Taxes. The Loan Parties shall pay to the relevant Governmental Authorities (or, at the option of Administrative Agent, timely reimburse it for the payment of) any present or future stamp, court, documentary, intangible, recording, filing or similar Taxes or any other excise or property Taxes that arise from any payment made hereunder or from the execution, delivery, performance, enforcement or registration of, from the receipt or perfection of a security interest under, or otherwise with respect to, this Agreement or any other Loan Document, except any such Taxes that are Other Connection Taxes imposed with respect to an assignment (other than an assignment made pursuant to Section 2.18) (“Other Taxes”). Within [**] after paying any such Other Taxes, each Loan Party shall deliver to Administrative Agent the original or a certified copy of a receipt issued by such Governmental Authority evidencing such payment, a copy of the return reporting such payment, or other evidence satisfactory to Administrative Agent that such Other Taxes have been paid to the relevant Governmental Authority. (c) Tax Indemnification. (i) The Loan Parties hereby jointly and severally indemnify and agree to hold Administrative Agent and any Lender harmless from and against the full amount of all Indemnified Taxes (including, without limitation, Indemnified Taxes imposed or asserted on or attributable to any amounts payable under this Section 2.15) payable or paid by such Person or required to be withheld or deducted from a payment to such Person and any reasonable expenses arising therefrom or with respect thereto, whether or not such Indemnified Taxes were correctly or legally imposed or asserted by the relevant Governmental Authority. Such indemnification shall be paid within [**] from the date on which Administrative Agent or Lender makes written demand therefor. A certificate as to the amount of such payment or liability delivered to Borrower by a Lender (with a copy to Administrative Agent), or by Administrative Agent on its own behalf or on behalf of a Lender, shall be conclusive absent manifest error.

- 65 - (ii) Each Lender shall severally indemnify Administrative Agent, within [**] after demand therefor, for (i) any Indemnified Taxes attributable to such Lender (but only to the extent that the Loan Parties have not already indemnified Administrative Agent for such Indemnified Taxes and without limiting the obligation of the Loan Parties to do so), (ii) any Taxes attributable to such Lender’s failure to comply with the provisions of Section 10.6(h)(ii) relating to the maintenance of a Participant Register and (iii) any Excluded Taxes attributable to such Lender, in each case, that are payable or paid by Administrative Agent in connection with any Loan Document, and any reasonable expenses arising therefrom or with respect thereto, whether or not such Taxes were correctly or legally imposed or asserted by the relevant Governmental Authority. A certificate as to the amount of such payment or liability delivered to any Lender by Administrative Agent shall be conclusive absent manifest error. Each Lender hereby authorizes Administrative Agent to set off and apply any and all amounts at any time owing to such Lender under any Loan Document or otherwise payable by Administrative Agent to the Lender from any other source against any amount due to Administrative Agent under this paragraph. (d) Evidence of Exemption From Withholding Tax. (i) Any Lender that is entitled to an exemption from or reduction of withholding Tax with respect to payments made under any Loan Document shall deliver to Borrower and Administrative Agent, at the time or times reasonably requested by Borrower or the Administrative Agent, such properly completed and executed documentation reasonably requested by Borrower or Administrative Agent as will permit such payments to be made without withholding or at a reduced rate of withholding. In addition, any Lender, if reasonably requested by Borrower or Administrative Agent, shall deliver such other documentation prescribed by applicable law or reasonably requested by Borrower or Administrative Agent as will enable Borrower or Administrative Agent to determine whether or not such Lender is subject to backup withholding or information reporting requirements. Notwithstanding anything to the contrary in the preceding two sentences, the completion, execution and submission of such documentation (other than such documentation set forth in Section 2.15(d)(i)(A), (i)(B) and (i)(D)) shall not be required if in the Lender’s reasonable judgment such completion, execution or submission would subject such Lender to any material unreimbursed cost or expense or would materially prejudice the legal or commercial position of such Lender. Without limiting the generality of the foregoing, in the event that Borrower is a U.S. Person: (A) any Lender that is a U.S. Person shall deliver to Borrower and Administrative Agent on or about the date on which such Xxxxxx becomes a Lender under this Agreement (and from time to time thereafter upon the reasonable request of Borrower or Administrative Agent), executed copies of IRS Form W-9 certifying that such Lender is exempt from U.S. federal backup withholding tax; (B) any Foreign Lender shall, to the extent it is legally entitled to do so, deliver to Borrower and Administrative Agent (in such number of copies as shall be requested by the recipient) on or about the date on which such Foreign Lender becomes a Lender under this Agreement (and from time to time thereafter upon the reasonable request of Borrower or Administrative Agent), whichever of the following is applicable: (1) in the case of a Foreign Lender claiming the benefits of an income tax treaty to which the United States is a party (x) with respect to payments of interest under any Loan Document, executed copies of IRS Form W-8BEN or IRS Form W-8BEN-E establishing an exemption from, or reduction of, U.S. federal withholding Tax pursuant to the “interest” article of such tax treaty and (y) with respect to any other applicable payments under any Loan Document, IRS Form W-8BEN or IRS Form

- 66 - W-8BEN-E establishing an exemption from, or reduction of, U.S. federal withholding Tax pursuant to the “business profits” or “other income” article of such tax treaty; (2) executed copies of IRS Form W-8ECI; (3) in the case of a Foreign Lender claiming the benefits of the exemption for portfolio interest under Section 881(c) of the Internal Revenue Code, (x) a certificate substantially in the form of Exhibit G-1 to the effect that such Foreign Lender is not a “bank” within the meaning of Section 881(c)(3)(A) of the Code, a “10 percent shareholder” of Borrower within the meaning of Section 871(h)(3)(B) of the Internal Revenue Code, or a “controlled foreign corporation” related to any Loan Party described in Section 881(c)(3)(C) of the Internal Revenue Code (a “U.S. Tax Compliance Certificate”) and (y) executed copies of IRS Form W-8BEN or IRS Form W-8BEN-E; or (4) to the extent a Foreign Lender is not the beneficial owner, executed copies of IRS Form W-8IMY, accompanied by IRS Form W- 8ECI, IRS Form W-8BEN, IRS Form W-8BEN-E, a U.S. Tax Compliance Certificate substantially in the form of Exhibit G-2 or Exhibit G-3, IRS Form W-9, and/or other certification documents from each beneficial owner, as applicable; provided that if the Foreign Lender is a partnership and one or more direct or indirect partners of such Foreign Lender are claiming the portfolio interest exemption, such Foreign Lender may provide a U.S. Tax Compliance Certificate substantially in the form of Exhibit G-4 on behalf of each such direct and indirect partner; (ii) any Foreign Lender shall, to the extent it is legally entitled to do so, deliver to Borrower and Administrative Agent (in such number of copies as shall be requested by the recipient) on or about the date on which such Foreign Lender becomes a Lender under this Agreement (and from time to time thereafter upon the reasonable request of Borrower or Administrative Agent), executed copies of any other form prescribed by applicable law as a basis for claiming exemption from or a reduction in U.S. federal withholding Tax, duly completed, together with such supplementary documentation as may be prescribed by applicable law to permit Borrower or Administrative Agent to determine the withholding or deduction required to be made; and (iii) If a payment made to a Lender under any Loan Document would be subject to United States federal withholding Tax imposed by FATCA if such Lender were to fail to comply with the applicable reporting requirements of FATCA (including those contained in Section 1471(b) or 1472(b) of the Internal Revenue Code, as applicable), such Lender shall deliver to Company and Administrative Agent at the time or times prescribed by law and at such time or times reasonably requested by Company or Administrative Agent such documentation prescribed by applicable law (including as prescribed by Section 1471(b)(3)(C)(i) of the Internal Revenue Code) and such additional documentation reasonably requested by Company or Administrative Agent as may be necessary for Company and Administrative Agent to comply with their obligations under FATCA and to determine that such Lender has complied with such Xxxxxx’s obligations under FATCA or to determine the amount to deduct and withhold from such payment. Solely for purposes of this Section 2.15(d)(i)(A), FATCA shall include any amendments made to FATCA after the date of this Agreement. Notwithstanding the above, a Lender shall not be required to deliver any form or other form of documentation pursuant to this Section 2.15(d)(i)(A) that such Lender is not legally able to deliver. Each Lender agrees that if any form or certification it previously delivered

- 77 - Platform Intellectual Property Rights that any other Person owns or under which Borrower or its Subsidiaries owes any royalties or other payments to any Person, in each case, for the use of any such Intellectual Property Rights in the research, development, use, import or Commercialization of a Product (other than licenses received from contract research organizations (CROs), contract development and manufacturing organizations (CDMOs), contract manufacturing organizations (CMOs) or other service providers in the ordinary course of business), or (ii) under which Borrower or its Subsidiaries have granted any Person any right or interest in any Product Intellectual Property Rights, Platform Intellectual Property Rights, Registrations, and/or Regulatory Documentation (other than licenses given to contract research organizations (CROs), contract development and manufacturing organizations (CDMOs), contract manufacturing organizations (CMOs) or other service providers in the ordinary course of business), including co-existence agreements and covenants not to sue, except in each case of clauses (i) and (ii), Contractual Obligations relating solely to any Pipeline Product, where such Contractual Obligations are not material to the research, development, use, import or Commercialization of such Pipeline Product (collectively, “License Agreements”) that are in effect as of the Effective Date. Upon written request by the Administrative Agent (but no more frequently than every Calendar Quarter), Borrower shall update Schedule 4.23(b) to list any new License Agreements entered into after the Effective Date (including, for the avoidance of doubt, any Permitted Zodasiran Agreement and any Permitted Plozasiran Agreement, if any). A true, correct and complete copy of each License Agreement has been provided to the Administrative Agent by the Borrower prior to the Closing Date. Neither the Borrower nor any of its Subsidiaries, on the one hand, nor the respective counterparty(ies) thereto has made or entered into any amendment, supplement or modification to, or granted any waiver under any provision of any License Agreement. Each License Agreement identified on Schedule 4.23(b) is a valid and binding obligation of Borrower and, to the knowledge of such Loan Party, the counterpart(ies) thereto, and, to the knowledge of such Loan Party, is enforceable against each counterparty thereto in accordance with its terms, except as may be limited by applicable Debtor Relief Laws or by general principles of equity (whether considered in a proceeding in equity or at law). Each License Agreement identified on Schedule 4.23(b) will continue to be legal, valid, binding, enforceable (except as such enforceability may be limited by applicable Debtor Relief Laws or by general principles of equity (whether considered in a proceeding in equity or at law)), and in full force and effect on identical terms, immediately following the consummation of the transactions contemplated by this Agreement. Borrower has not received any written notice in connection with any such License Agreement challenging the validity, enforceability or interpretation of any provision of such agreement. Borrower has not (A) given written notice to a counterparty of the termination of any such License Agreement (whether in whole or in part) or any written notice to a counterparty expressing any intention to terminate any such License Agreement or (B) received from a counterparty thereto any written notice of termination of any such License Agreement (whether in whole or in part) or any written notice from a counterparty stating its intention to terminate any such License Agreement. Except as set forth on Schedule 4.23(b), Borrower has not consented to any assignment by the counterparty to any License Agreement of any of its rights or obligations under any such License Agreement, and, to the knowledge of such Loan Party, the counterparty has not assigned any of its rights or obligations under any such License Agreement to any Person. Borrower has not notified in writing the respective counterparty to any License Agreement or any other Person of any claims for indemnification under any License Agreement nor has Borrower received any written claims for indemnification under any License Agreement. Borrower has not received any written notice from, or given any written notice to, any counterparty to any License Agreement alleging any infringement of any of the Patent rights licensed thereunder. To the knowledge of the Loan Parties, there are no sublicenses (excluding subcontracting) that have been granted by a Licensee under any License Agreement. Except as has been disclosed to the Administrative Agent prior to the Closing Date, there is and has been no breach or default under any provision of any License Agreement either by Borrower or, to the knowledge of Borrower, by the respective counterparty (or any predecessor thereof) thereto, and, to the knowledge of Borrower, there is no event that upon notice or the passage of time, or both, would reasonably be expected to give rise to any breach or default either by Borrower or by the respective counterparty to such agreement.

- 78 - (c) Schedule 4.23(c) sets forth as of July 26, 2024 a true, correct and complete listing, including the owner and registration or application number, of (i) all the Product Intellectual Property Rights related to Zodasiran, Plozasiran and/or the Partnered Assets, and (ii) all Platform Intellectual Property Rights with respect to Material Products, in the case of (i) and (ii), that are U.S. (federal or state) and foreign (A) Patents, and identifies the owner of each such patent/application, (B) registered trademarks and trademark applications, (C) registered copyrights and copyright applications, (D) domain names, and (E) any other form of registered Product Intellectual Property Rights and Platform Intellectual Property Rights. Except as identified in Schedule 4.23(c): (1) the owner listed on Schedule 4.23(c) is the exclusive owner of such registration or application; (2) to the knowledge of such Loan Party, such registrations are valid, subsisting and enforceable; (3) none of such registrations or applications have lapsed or been abandoned, cancelled or expired, except for registrations or applications abandoned in the ordinary course of business; (5) Company has taken all reasonable steps to maintain such registrations or applications, including by timely filing fees and responses, except for registrations or applications abandoned in the ordinary course of business; and (5) to the knowledge of such Loan Party, each individual associated with the filing and prosecution of such registrations or applications, including the named inventors in the case of such Product Patents and Platform Patents, has complied in all material respects with all applicable duties of candor and good faith in dealing with any patent office, including the USPTO, in those jurisdictions where such duties exist. Company may update this list to add additional registrations or applications, so long as such amendment occurs by written notice to Administrative Agent, subject to Borrower’s obligations and restrictions under this Agreement. (d) Neither Borrower nor any of its Subsidiaries has received written notice of any threat of any, opposition, interference, reexamination, inter partes review, post-grant review, derivation or other post-grant proceeding, injunction, claim, suit, action, subpoena, hearing, inquiry, investigation (by the International Trade Commission or otherwise), complaint, arbitration, mediation, demand, decree or other dispute, disagreement, proceeding or claim (collectively, “Disputes”) that challenges the validity, enforceability, infringement, ownership, or inventorship of any of the Product Intellectual Property Rights or Platform Intellectual Property Rights identified in Schedule 4.23(c), the Registrations and/or the Regulatory Documentation. Borrower and its Subsidiaries have not received any written notice that there is any, and, to their knowledge, there is no, Person who is or claims to be an inventor under any of the Product Patents or Platform Patents identified in Schedule 4.23(c) who is not a named inventor thereof. (e) Neither the Borrower nor any of its Subsidiaries is party to any past or pending and neither the Borrower nor its Subsidiaries has, since July 26, 2014, received written notice of any threat of any action, suit, or proceeding, or any investigation or claim by any Person that claims or alleges that the discovery, development, manufacture, use or Commercialization of any Product, once marketed, or the use of any Platform Technology does or could infringe on any Patent or other intellectual property rights of any other Person or constitute misappropriation of any other Person’s trade secrets or other intellectual property rights. (f) Except as disclosed in Schedule 4.23(f), neither Borrower nor its Subsidiaries has entered into any Contractual Obligation (i) creating a Lien (other than a Permitted Lien under clauses (a), (t) and (w) of the definition thereof) on the Product Intellectual Property Rights, Platform Intellectual Property Rights, Registrations, Regulatory Documentation or License Agreements or any of its Royalties on, or proceeds from, sales of any Product, (ii) pursuant to which Borrower or its Subsidiaries has sold, transferred, assigned or pledged to any Person, Royalties on, or proceeds from, sales of any Product or use of any Platform Technology, or (iii) providing for Milestones or similar development-, commercialization- or intellectual property-related payments to any Person applicable (or that with further development and commercialization may become applicable) to any such Product or Platform Technology.

- 81 - each such Registration, and no event has occurred or condition or state of facts exists which would constitute a breach or default under any such Registration, in each case that would reasonably be expected to cause the revocation, termination or suspension or material limitation of any such Registration, including but not limited to any form of clinical hold order. To the knowledge of the Loan Parties, any third party that develops, researches, manufactures, commercializes, distributes, stores, tests, advertises, promotes, sells or markets Products pursuant to an agreement with Borrower or its Subsidiaries (a “Loan Party Partner”) is in compliance with all Registrations from the FDA, EMA, and any comparable Governmental Authority insofar as they pertain to Products, and each such Loan Party Partner is, and since [**] has been, in compliance with applicable Public Health Laws, except, in each case, where the failure to so be in compliance would not reasonably be expected to, individually or in the aggregate, result in Material Regulatory Liabilities. (b) Each of Borrower and its Subsidiaries is in compliance, and since [**] has been in compliance, with all Public Health Laws, except to the extent that any such non-compliance, individually or in the aggregate, could not reasonably be expected to result in Material Regulatory Liabilities. (c) To the extent applicable, all products designed, developed, investigated, manufactured, prepared, assembled, packaged, tested, labeled, distributed, sold, marketed or delivered by Borrower or any of its Subsidiaries or, to the knowledge of the Loan Parties, service providers providing services to Borrower or any of its Subsidiaries, that are subject to the jurisdiction of the FDA, EMA, or any comparable Governmental Authority have, since [**], been and are being designed, developed, investigated, manufactured, prepared, assembled, packaged, tested, labeled, distributed, sold, marketed or delivered in compliance with the applicable Public Health Laws, except for such noncompliance that would not reasonably be expected to, individually or in the aggregate, result in Material Regulatory Liabilities. To the knowledge of Borrower and its Subsidiaries, there are no defects in the design or technology embodied in any Material Products that are reasonably expected to prevent the safe and effective performance of any such Material Product for its intended use (other than such limitations specified in the applicable package insert, investigator brochure or informed consent), except for such defects that would not reasonably be expected to, individually or in the aggregate, result in Material Regulatory Liabilities or other Liabilities. None of the Products has been the subject of any tort, products liability or warranty action against Borrower or its Subsidiaries or, to the Borrower’s knowledge, any non-legal claim for clinical trial compensation by trial participants (d) Neither Borrower nor any of its Subsidiaries is currently subject to any material obligation arising pursuant to a Regulatory Action and, to the knowledge of the Loan Parties, no such material obligation or Regulatory Action has been threatened or initiated by a Governmental Authority. (e) (i) Neither Borrower nor any of its Subsidiaries has since [**] received any written notice or communication from the FDA, EMA, or any other Governmental Authority alleging material noncompliance with any Public Health Law and (ii) to the knowledge of the Loan Parties no Loan Party Partner has since [**] received any written notice or communication from the FDA, EMA, or any other Governmental Authority alleging material noncompliance with any Public Health Law, including without limitation any notice of inspectional observation, notice of adverse finding, notice of violation, warning letters, untitled letters or other notices from any Governmental Authority relating to such Loan Party Partner’s work for Borrower or such Subsidiary. There have been no recalls, field notifications, market withdrawals, administrative detentions, warnings, “dear doctor” letters, investigator notices, safety alerts or any other notices of action relating to an actual or potential lack of safety, efficacy, or regulatory compliance of any Products (“Safety Notices”) and no clinical hold orders issued by the FDA, EMA, or any other oversight authority with respect to an ongoing or anticipated clinical trial of any Product, and to the knowledge of the Loan Parties, there are no facts or circumstances that are reasonably likely to result in

- 89 - contractors) is prohibited by Requirements of Law or any binding agreement or (ii) that is subject to attorney client or similar privilege or constitutes attorney work product, in each case based on the advice of counsel to Borrower. Section 5.2 Existence. Except as otherwise permitted under Section 6.9, each Loan Party will, and will cause each of Borrower’s Subsidiaries to, at all times preserve and keep in full force and effect its existence and all rights and Governmental Authorizations, qualifications, franchises, licenses and permits material to its business and to conduct its business in each jurisdiction in which its business is conducted; provided, no Loan Party or any of Borrower’s Subsidiaries shall be required to preserve any such existence, right or Governmental Authorizations, qualifications, franchise, licenses and permits if such Person’s Board of Directors (or similar governing body) or any senior officer of such Person shall determine that the preservation thereof is no longer desirable in the conduct of the business of such Person, and that the loss thereof is not disadvantageous in any material respect to such Person or to Lenders. Section 5.3 Payment of Taxes and Claims. Each Loan Party will, and will cause each of Borrower’s Subsidiaries to, file all Tax returns required to be filed by or with respect to Borrower or any of its Subsidiaries and timely pay all Taxes imposed upon or with respect to it or any of its properties, assets, income, businesses or franchises before any penalty or fine accrues thereon, and all claims (including claims for labor, services, materials and supplies) for sums that have become due and payable and that by law have or may become a Lien upon any of its properties or assets, prior to the time when any penalty or fine shall be incurred with respect thereto, except for (a) unpaid Taxes in an aggregate amount at any one time not in excess of $[**] and (b) Taxes that are being contested in good faith by appropriate proceedings diligently conducted and for which adequate reserves are being maintained in accordance with GAAP. Section 5.4 Maintenance of Properties. Each Loan Party will, and will cause each of Borrower’s Subsidiaries to (a) maintain or cause to be maintained in good repair, working order and condition, ordinary wear and tear excepted, all properties used or useful in the business of Borrower and its Subsidiaries and from time to time will make or cause to be made all appropriate repairs, renewals and replacements thereof, except to the extent any such failure to maintain could not reasonably be expected to have a Material Adverse Effect, and (b) comply at all times with the provisions of all material leases to which it is a party as lessee or under which it occupies property, so as to prevent any loss or forfeiture thereof or thereunder, except to the extent any such failure to comply could not reasonably be expected to have a Material Adverse Effect. Each Loan Party shall, and shall cause its Subsidiaries to, (A) maintain adequate administrative, physical, and technical security measures and procedures to protect the confidentiality, integrity, and security of the Loan Parties’ data systems and the Loan Parties’ data in all material respects, in all cases including from theft, corruption, loss or unauthorized use, access, interruption, deletion, or modification by any Person, and (B) keep all Loan Party data systems operational and maintain adequate backups and disaster recovery arrangements that are at least reasonable and at least consistent with, as protective as, and no less rigorous than, industry standards for companies and businesses of similar size in similar industries. Without limiting the generality of the foregoing, each Loan Party shall, and shall cause its Subsidiaries to, (x) maintain applicable equipment and software in physically secure premises, (y) utilize industry-accepted virus and intrusion checking software and firewalls, and (z) limit access to Loan Party data to only those employees and agents who need such access for the conduct of the business of the Loan Parties and their Subsidiaries, in each case except as would not reasonably result in a Material Adverse Effect. Section 5.5 Insurance. (a) The Loan Parties will maintain or cause to be maintained, with financially sound and reputable insurers, (i) business interruption insurance, and (ii) casualty insurance, such public liability insurance, third party property damage insurance or such other insurance with respect to liabilities, losses

- 90 - or damage in respect of the assets, properties and businesses of the Loan Parties as may customarily be carried or maintained under similar circumstances by Persons of established reputation engaged in similar businesses, in each case in such amounts (giving effect to self-insurance), with such deductibles, covering such risks and otherwise on such terms and conditions as shall be customary for such Persons, in each case as determined by the Borrower in its reasonable business judgment. Each such policy of insurance shall, subject to Section 5.14, (1) name Administrative Agent, on behalf of Lenders as an additional insured thereunder as its interests may appear, and (2) in the case of each casualty insurance policy, contain a loss payable clause or endorsement, satisfactory in form and substance to Administrative Agent, that names Administrative Agent, on behalf of Secured Parties as the loss payee thereunder. If any Loan Party or any of its Subsidiaries fails to maintain such insurance, Administrative Agent may, upon [**] prior written notice to Borrower, arrange for such insurance, but at Company’s expense and without any responsibility on Administrative Agent’s part for obtaining the insurance, the solvency of the insurance companies, the adequacy of the coverage, or the collection of claims. Upon the occurrence and during the continuance of an Event of Default, Administrative Agent shall have the sole right, in the name of the Lenders, any Loan Party and its Subsidiaries, to file claims under any insurance policies, to receive, receipt and give acquittance for any payments that may be payable thereunder, and to execute any and all endorsements, receipts, releases, assignments, reassignments or other documents that may be necessary to effect the collection, compromise or settlement of any claims under any such insurance policies. (b) Each of the insurance policies required to be maintained under this Section 5.5 shall, subject to Section 5.14, provide for either (i) at least [**] prior written notice to Administrative Agent of the cancellation or substantial modification thereof or (ii) if not permitted by the applicable insurance provider after the use of commercially reasonable efforts to obtain such prior written notice, prompt notice following any cancelation or substantial modification thereof. Receipt of such notice shall entitle Administrative Agent (but Administrative Agent shall not be obligated), upon [**] prior written notice to Loan Parties, to renew any such policies, cause the coverages and amounts thereof to be maintained at levels required pursuant to this Section 5.5 or otherwise to obtain similar insurance (including with respect to coverage types, limits and premiums) in place of such policies, in each case at the expense of the Loan Parties. Section 5.6 Books and Records; Inspections. Each Loan Party will, and will cause each of Borrower’s Subsidiaries to, (a) maintain at all times at the chief executive office of Borrower copies of all material books and records of Borrower and its Subsidiaries, (b) keep adequate books of record and account in which full, true and correct entries in all material respects are made of all dealings and transactions in relation to its business and activities, and (c) permit any representatives designated by Administrative Agent (including employees of Administrative Agent, any Lender or any consultants, auditors, accountants, lawyers and appraisers retained by Administrative Agent) to visit any of the properties of any Loan Party and any of Borrower’s Subsidiaries to inspect, copy and take extracts from its and their financial and accounting records, and to discuss its and their affairs, finances and accounts with its and their officers and independent accountants and auditors, all upon reasonable notice and at such reasonable times during normal business hours (so long as no Default or Event of Default has occurred and is continuing) and as often as may reasonably be requested; provided that, absent the occurrence and continuance of an Event of Default, Administrative Agent and Lenders shall not exercise such rights more often than one time during any Fiscal Year. The Loan Parties agree to pay the reasonable and documented out-of-pocket costs and expenses incurred by the examiner in connection therewith. Upon the Administrative Agent’s request, which shall not be more frequently than once per Fiscal Year with respect to any individual License Agreement, the Borrower and its shall use commercially reasonable efforts to exercise any rights they may have under any License Agreement relating to a Product to cause an inspection and/or audit by an independent public accounting firm to be made of the books of account of any counterparty thereto for the purpose of determining the correctness of any payments made under the License Agreement and this Agreement.

- 95 - encumbrance or restriction is not applicable to any Person, or the properties or assets of any Person, other than the Person, or the property or assets of the Person, so acquired or designation, (d) restrictions on cash or other deposits or net worth imposed by customers under commercial contracts entered into in the ordinary course of business, (e) [reserved], (f) customary provisions in joint venture agreements or arrangements and other similar agreements or arrangements relating solely to the applicable joint venture, (g) any encumbrance or restriction contained in Indebtedness otherwise permitted to be incurred hereunder and (h) any encumbrances or restrictions of the type referred to in the immediately preceding clauses (a) through (g) above imposed by any amendments, modifications, restatements, renewals, increases, supplements, refundings, replacements or refinancings of the contracts, instruments or obligations referred to such immediately preceding clauses (a) through (h) above; provided that such encumbrances and restrictions contained in any such amendment, modification, restatement, renewal, increase, supplement, refunding, replacement or refinancing are, in the good faith judgment of the Borrower, not materially more restrictive, taken as a whole, than the encumbrances and restrictions prior to such amendment, modification, restatement, renewal, increase, supplement, refunding, replacement or refinancing, no Loan Party nor any of Borrower’s Subsidiaries shall enter into any agreement prohibiting the creation or assumption of any Lien upon any of its properties or assets, whether now owned or hereafter acquired. Section 6.5 Restricted Junior Payments. No Loan Party shall, nor shall it permit any of its Subsidiaries through any manner or means or through any other Person to, directly or indirectly, declare, order, pay, make or set apart, or agree to declare, order, pay, make or set apart, any sum for any Restricted Junior Payment, in each case, except for: (a) the payment of dividends to Company’s equityholders in the form of Common Stock; (b) (i) the issuance of Capital Stock of Company upon the exercise of any warrants, options or rights to acquire such Capital Stock, including upon conversion of any Indebtedness that is convertible into or exchangeable for Capital Stock of Company, and (ii) cash payments in lieu of issuing fractional shares in connection with the exercise of warrants, options or other securities convertible or exchangeable into Capital Stock of Company; (c) the payment of dividends or other Restricted Junior Payments by a Subsidiary of Borrower to any Loan Party or such Subsidiary’s direct parent company; (d) the repurchase, retirement or other acquisition or retirement for value of Company’s Capital Stock held by any future, present or former employee, director, manager, officer or consultant (or any Affiliates, spouses, former spouses, other immediate family members, successors, executors, administrators, heirs, legatees or distributees of any of the foregoing) of Company or any of its Subsidiaries pursuant to any employee, management, director or manager equity plan, employee, management, director or manager stock option plan or any other employee, management, director or manager benefit plan or any agreement (including any stock subscription or shareholder agreement) with any employee, director, manager, officer or consultant of Borrower or any Subsidiary; provided that the aggregate amounts of all such payments made pursuant to this clause (d), shall not, in the aggregate, exceed $[**]; (e) any payments pursuant to any Permitted Royalty Transaction; (f) (i) the purchase by Borrower of Common Stock (including pursuant to Permitted Equity Derivatives) contemporaneously and otherwise in connection with the incurrence of Permitted Convertible Indebtedness; provided that the aggregate consideration for such Common Stock in connection with such purchases shall not exceed [**]% of the net proceeds received by Borrower from the incurrence

- 98 - Product or Platform Technology and is no longer useful in any material respect in the business of the Borrower and its Subsidiaries; (vii) Asset Sales of obsolete or worn out, retired or surplus property, whether now owned or hereafter acquired, in the ordinary course of business; (viii) surrender or waiver of contractual rights and settlement or waiver of contractual or litigation claims in the ordinary course of business; (ix) Asset Sales to any Loan Party; (x) Asset Sales by any Subsidiary that is not a Loan Party; provided that, in connection with such Asset Sales the Company shall receive consideration of which not less than [**]% shall be in cash or Cash Equivalents; (xi) Asset Sales of Plozasiran pursuant to a Permitted Royalty Transaction under clause (b) of the definition thereof, which shall be subject to the prepayment provisions of Section 2.10(g); (xii) Asset Sales consisting of Permitted Liens and permitted Restricted Junior Payments; (xiii) use or transfer of Cash or Cash Equivalents, including the sale or disposition of Cash Equivalents for cash or other Cash Equivalents; (xiv) Asset Sales of Capital Stock in any Joint Venture to the other holders of Capital Stock in such Joint Venture; provided that in connection with such Asset Sales the Company shall receive consideration of which not less than [**]% shall be in cash or Cash Equivalents; (xv) other Asset Sales in an amount not to exceed $[**]; provided that in connection with such Asset Sales the Company shall receive consideration of which not less than [**]% shall be in cash or Cash Equivalents; (xvi) Asset Sales described in clause (c) of the definition thereof so long as any cash proceeds are subject to the requirements of Section 2.10(d); (xvii) Asset Sales of Pipeline Assets pursuant to one or more Pipeline Asset Monetizations (but excluding, for the avoidance of doubt, any Asset Sales in connection with any tangible (other than inventory) or intangible assets specific to (x) any Material Product, (y) any Specified Transaction, subject to the mandatory prepayments required by Section 2.10(h), and (z) any out-license of Platform Intellectual Property Rights other than pursuant to a Permitted Product Agreement solely for use in of such Platform Intellectual Property Rights in the development, manufacture and /or Commercialization of a Product or back-ups or follow-ons of such Product); provided that, in connection with such Asset Sales the Company shall receive consideration of which not less than [**]% shall be in cash or Cash Equivalents; (xviii) Asset Sales with respect to Pipeline Assets in connection with any Specified Transaction pursuant to a Permitted Product Agreement; provided that such Specified Transaction is consummated on terms no less favorable than those last disclosed in writing to the Administrative Agent prior to the consummation of such Asset Sale; provided, that, after the consummation of any such Specified Transaction, the assets subject to such Specified Transaction shall become Partnered Assets and shall be

- 104 - (e) solely with respect to the applicable Guarantor (and without limiting the Borrower’s rights hereunder), any Beneficiary, upon such terms as it deems appropriate, without notice or demand and without affecting the validity or enforceability hereof or giving rise to any reduction, limitation, impairment, discharge or termination of any Guarantor’s liability hereunder, from time to time may (i) renew, extend, accelerate, increase the rate of interest on, or otherwise change the time, place, manner or terms of payment of the Guaranteed Obligations; (ii) settle, compromise, release or discharge, or accept or refuse any offer of performance with respect to, or substitutions for, the Guaranteed Obligations or any agreement relating thereto and/or subordinate the payment of the same to the payment of any other obligations; (iii) request and accept other guaranties of the Guaranteed Obligations and take and hold security for the payment hereof or the Guaranteed Obligations; (iv) release, surrender, exchange, substitute, compromise, settle, rescind, waive, alter, subordinate or modify, with or without consideration, any security for payment of the Guaranteed Obligations, any other guaranties of the Guaranteed Obligations, or any other obligation of any Person (including any other Guarantor) with respect to the Guaranteed Obligations; (v) enforce and apply any security now or hereafter held by or for the benefit of such Beneficiary in respect hereof or the Guaranteed Obligations and direct the order or manner of sale thereof, or exercise any other right or remedy that such Beneficiary may have against any such security, in each case as such Beneficiary in its discretion may determine consistent herewith and any applicable security agreement, including foreclosure on any such security pursuant to one or more judicial or non-judicial sales, whether or not every aspect of any such sale is commercially reasonable, and even though such action operates to impair or extinguish any right of reimbursement or subrogation or other right or remedy of any Guarantor against Company or any security for the Guaranteed Obligations; and (vi) exercise any other rights available to it under the Loan Documents; and (f) this Guaranty and the obligations of Guarantors hereunder shall be valid and enforceable and shall not be subject to any reduction, limitation, impairment, discharge or termination for any reason (other than payment in full in cash of the Guaranteed Obligations), including the occurrence of any of the following, whether or not any Guarantor shall have had notice or knowledge of any of them: (i) any failure or omission to assert or enforce or agreement or election not to assert or enforce, or the stay or enjoining, by order of court, by operation of law or otherwise, of the exercise or enforcement of, any claim or demand or any right, power or remedy (whether arising under the Loan Documents, at law, in equity or otherwise) with respect to the Guaranteed Obligations or any agreement relating thereto, or with respect to any other guaranty of or security for the payment of the Guaranteed Obligations; (ii) any rescission, waiver, amendment or modification of, or any consent to departure from, any of the terms or provisions (including provisions relating to events of default) hereof, any of the other Loan Documents or any agreement or instrument executed pursuant thereto, or of any other guaranty or security for the Guaranteed Obligations, in each case whether or not in accordance with the terms hereof or such Loan Document or any agreement relating to such other guaranty or security; (iii) the Guaranteed Obligations, or any agreement relating thereto, at any time being found to be illegal, invalid or unenforceable in any respect; (iv) the application of payments received from any source (other than payments received pursuant to the other Loan Documents or from the proceeds of any security for the Guaranteed Obligations, except to the extent such security also serves as collateral for indebtedness other than the Guaranteed Obligations) to the payment of indebtedness other than the Guaranteed Obligations, even though any Beneficiary might have elected to apply such payment to any part or all of the Guaranteed Obligations; (v) any Beneficiary’s consent to the change, reorganization or termination of the corporate structure or existence of Borrower or any of its Subsidiaries and to any corresponding restructuring of the Guaranteed Obligations; (vi) any failure to perfect or continue perfection of a security interest in any collateral which secures any of the Guaranteed Obligations; (vii) any defenses, set offs or counterclaims which Company may allege or assert against any Beneficiary in respect of the Guaranteed Obligations, including failure of consideration, breach of warranty, payment, statute of frauds, statute of limitations, accord and satisfaction and usury; and (viii) any other act or thing or omission, or delay to do any other act or thing, which may or might in any manner or to any extent vary the risk of any Guarantor as an obligor in respect of the Guaranteed Obligations.

- 107 - such portion of the Guaranteed Obligations if such case or proceeding had not been commenced) shall be included in the Guaranteed Obligations because it is the intention of Guarantors and Beneficiaries that the Guaranteed Obligations which are guaranteed by Guarantors pursuant hereto should be determined without regard to any rule of law or order which may relieve Company of any portion of such Guaranteed Obligations. Guarantors will permit any trustee in bankruptcy, receiver, administrator, debtor in possession, assignee for the benefit of creditors or similar person to pay Administrative Agent, or allow the claim of Administrative Agent in respect of, any such interest accruing after the date on which such case or proceeding is commenced. (c) In the event that all or any portion of the Guaranteed Obligations are paid by Company, the obligations of Guarantors hereunder shall continue and remain in full force and effect or be reinstated, as the case may be, in the event that all or any part of such payment(s) are rescinded or recovered directly or indirectly from any Beneficiary as a preference, fraudulent transfer or otherwise, and any such payments which are so rescinded or recovered shall constitute Guaranteed Obligations for all purposes hereunder. Section 7.12 Discharge of Guaranty Upon Sale of Guarantor. If all of the Capital Stock of any Guarantor or any of its successors in interest hereunder shall be sold or otherwise disposed of (including by merger or consolidation) in accordance with the terms and conditions hereof, the Guaranty of such Guarantor or such successor in interest, as the case may be, hereunder shall automatically be discharged and released without any further action by any Beneficiary or any other Person effective as of the time of such Asset Sale. ARTICLE VIII EVENTS OF DEFAULT Section 8.1 Events of Default. If any one or more of the following conditions or events shall occur: (a) Failure to Make Payments When Due. Failure by Company to pay (i) the principal of and premium, if any, on any Term Loan when due whether at stated maturity, by acceleration or otherwise; or (ii) within [**] when due any interest on any Term Loan or any fee or any other amount due hereunder; or (b) Default in Other Agreements. (i) Failure of any Loan Party or any Loan Party’s Subsidiaries to pay when due any principal of or interest on or any other amount payable in respect of one or more items of Indebtedness (other than Indebtedness referred to in Section 8.1(a)) in a principal amount in excess of the Threshold Amount, in each case beyond the grace period, if any, provided therefor, or (ii) breach or default by any Loan Party with respect to any other material term of (A) one or more items of Indebtedness in the principal amount referred to in clause (i) above, or (B) any loan agreement, mortgage, indenture or other agreement relating to such item(s) of Indebtedness, in each case beyond the grace period, if any, provided therefor, if the effect of such breach or default is to cause, or to permit the holder or holders of that Indebtedness (or a trustee on behalf of such holder or holders), to cause, that Indebtedness to become or be declared due and payable (or subject to a compulsory repurchase or redeemable) or to require the prepayment, redemption, repurchase or defeasance of, or to cause Borrower or any of Borrower’s Subsidiaries to make any offer to prepay, redeem, repurchase or defease such Indebtedness, prior to its stated maturity or the stated maturity of any underlying obligation, as the case may be; or (c) Breach of Certain Covenants. Failure of any Loan Party to perform or comply with any term or condition contained in Section 2.2, Section 5.1(a), (b), (c), (d), (e), (f), (j)-(o), (q) and (s),

- 115 - Required Lenders (or such other percentage of the Lenders whose consent may be required in accordance with Section 10.05), (v) to the extent the property constituting such Collateral is owned by any Guarantor, upon the release of such Guarantor from its obligations under the Guaranty in accordance with the terms of this Agreement, or (vii) if such assets constitute Excluded Assets. The Administrative Agent shall be entitled to rely on a certificate in which the Borrower certifies that the Liens granted to the Administrative Agent on such assets may be released pursuant hereto or such assets constitute Excluded Assets or such Guarantor is an Excluded Subsidiary without further inquiry. The Lenders hereby authorize and instruct the Administrative Agent to, and the Administrative Agent agrees to, execute and deliver any instruments, acknowledgements, documents and agreements reasonably necessary or reasonably requested by the Borrower to evidence and confirm the release of any Guarantor or Collateral pursuant to the foregoing provisions of this paragraph, all without the further consent or joinder of any Lender and without any representation or warranty of any such Agent. (c) Right to Realize on Collateral and Enforce Guaranty. Anything contained in any of the Loan Documents to the contrary notwithstanding, Company, Administrative Agent and each Lender hereby agree that (i) no Lender shall have any right individually to realize upon any of the Collateral or to enforce the Guaranty, it being understood and agreed that all powers, rights and remedies hereunder may be exercised solely by Administrative Agent, on behalf of Lenders in accordance with the terms hereof and all powers, rights and remedies under the Collateral Documents may be exercised solely by Administrative Agent, and (ii) in the event of a foreclosure by Administrative Agent on any of the Collateral pursuant to a public or private sale or any sale of the Collateral in a case under the Bankruptcy Code, Administrative Agent or any Lender may be the purchaser of any or all of such Collateral at any such sale and Administrative Agent, as agent for and representative of Secured Parties (but not any Lender or Lenders in its or their respective individual capacities unless Required Lenders shall otherwise agree in writing) shall be entitled, for the purpose of bidding and making settlement or payment of the purchase price for all or any portion of the Collateral sold at any such public sale, to use and apply any of the Obligations as a credit on account of the purchase price for any collateral payable by Administrative Agent at such sale. The Secured Parties hereby irrevocably authorize the Administrative Agent, at the direction of the Required Lenders, to credit bid all or any portion of the Obligations (including by accepting some or all of the Collateral in satisfaction of some or all of the Obligations pursuant to a deed in lieu of foreclosure or otherwise) and in such manner purchase (either directly or through one or more acquisition vehicles) all or any portion of the Collateral (a) at any sale thereof conducted under the provisions of the Bankruptcy Code, including under Sections 363, 1123 or 1129 of the Bankruptcy Code, or any similar laws in any other jurisdictions to which a Loan Party is subject, or (b) at any other sale, foreclosure or acceptance of collateral in lieu of debt conducted by (or with the consent or at the direction of) the Administrative Agent (whether by judicial action or otherwise) in accordance with any applicable law. In connection with any such credit bid and purchase, the Obligations owed to the Secured Parties shall be entitled to be, and shall be, credit bid by the Administrative Agent at the direction of the Required Lenders on a ratable basis (with Obligations with respect to contingent or unliquidated claims receiving contingent interests in the acquired assets on a ratable basis that shall vest upon the liquidation of such claims in an amount proportional to the liquidated portion of the contingent claim amount used in allocating the contingent interests) for the asset or assets so purchased (or for the equity interests or debt instruments of the acquisition vehicle or vehicles that are issued in connection with such purchase). In connection with any such bid (i) the Administrative Agent shall be authorized to form one or more acquisition vehicles and to assign any successful credit bid to such acquisition vehicle or vehicles, (ii) each of the Secured Parties’ ratable interests in the Obligations which were credit bid shall be deemed without any further action under this Agreement to be assigned to such vehicle or vehicles for the purpose of closing such sale, (iii) the Administrative Agent shall be authorized to adopt documents providing for the governance of the acquisition vehicle or vehicles (provided that any actions by the Administrative Agent with respect to such acquisition vehicle or vehicles, including any disposition of the assets or equity interests thereof, shall be governed, directly or indirectly, by, and the governing documents shall provide for, control by the vote of the Required Lenders or their permitted

- 122 - assigned or delegated by any Loan Party without the prior written consent of all Lenders. Nothing in this Agreement, expressed or implied, shall be construed to confer upon any Person (other than the parties hereto, Indemnitee Agent Parties under Section 9.6, Indemnitees under Section 10.3, their respective successors and assigns permitted hereby and, to the extent expressly contemplated hereby, Affiliates of each of Administrative Agent and Lenders) any legal or equitable right, remedy or claim under or by reason of this Agreement. (b) Maintenance of the Register. Company, Administrative Agent and Lenders shall, in accordance with the Register provisions of Section 2.3(b), deem and treat the Persons listed as Lenders in the Register as the holders and owners of the corresponding Commitments and Loans listed therein for all purposes hereof, and no assignment or transfer of any such Term Loan Commitment or Loan shall be effective, in each case, unless and until an Assignment Agreement effecting the assignment or transfer thereof shall have been delivered to and accepted by Administrative Agent and recorded in the Register as provided in Section 10.6(e). Prior to such recordation, all amounts owed with respect to the applicable Term Loan Commitment or Loan shall be owed to the Lender listed in the Register as the owner thereof. (c) Right to Assign. Each Lender shall have the right at any time to sell, assign or transfer all or a portion of its rights and obligations under this Agreement, including, without limitation, all or a portion of its Term Loan Commitment or Loans owing to it or other Obligations (provided, however, that each such assignment shall be of a uniform, and not varying, percentage of all rights and obligations under and in respect of any Loan and any related Commitments; provided, however, that each such assignment of an Initial Term Loan or Delayed Draw Term Loan Commitment shall be accompanied by a pro rata assignment of such Xxxxxx’s Delayed Draw Term Loan Commitments or Initial Term Loans, respectively): (i) to any Person meeting the criteria of clause (a) of the definition of the term of “Eligible Assignee” upon the giving of notice to Company and Administrative Agent; and (ii) to any Person otherwise constituting an Eligible Assignee with the consent of Company (so long as no Default or Event of Default has occurred and is continuing) (provided, that if Company shall not have responded in writing within [**] after receipt of written notice of the proposed assignment, Company shall be deemed to have approved such assignment) and Administrative Agent; provided, each such assignment pursuant to this Section 10.6(c)(ii) shall be in an aggregate amount of not less than $[**] (or such lesser amount as may be agreed to by Company and Administrative Agent). (d) Mechanics. The assigning Xxxxxx and the assignee thereof shall execute and deliver to Administrative Agent an Assignment Agreement, together with such forms or certificates with respect to tax withholding matters as the assignee under such Assignment Agreement may be required to deliver to Administrative Agent pursuant to Section 2.15(d) and all “know your customer” documentation. (e) Notice of Assignment. Upon its receipt and acceptance of a duly executed and completed Assignment Agreement, any forms or certificates required by this Agreement in connection therewith, Administrative Agent shall record the information contained in such Assignment Agreement in the Register, shall give prompt notice thereof to Company and shall maintain a copy of such Assignment Agreement. (f) Representations and Warranties of Assignee. Each Lender, upon execution and delivery hereof or upon executing and delivering an Assignment Agreement, as the case may be, represents and warrants as of the Closing Date or as of the applicable Effective Date (as defined in the applicable Assignment Agreement) that (i) it is an Eligible Assignee; (ii) it has experience and expertise in the making of or investing in commitments or loans such as the applicable Term Loan Commitments or Loans, as the

- 126 - discount obligation” and will not be treated as not having “significant original issue discount,” as such terms are defined above Section 10.14 Tax Treatment. The parties hereto agree that (a) the Loans are intended to be treated as contingent payment debt instruments within the meaning of Section 1.1275-4 of the Treasury Regulations for U.S. federal income and any other applicable tax purposes; (b) that interest and original interest payable under the Loans is not “contingent interest” within the meaning of Sections 871(h)(4) and 881(c)(4) of the Code and (c) to adhere to this Section 10.14 for U.S. federal income and any other applicable Tax purposes and not to take any action or file any Tax return, report or declaration inconsistent herewith unless otherwise required by applicable law. The Borrower shall not determine the comparable yield or the projected payment schedule (as defined in Section 1.1275-4 of the Treasury Regulations) of the Loans without the consent of the Lenders (not to be unreasonably conditioned, withheld or delayed). The inclusion of this Section 10.14 is not an admission by any Lender that it is subject to United States taxation. Section 10.15 Original Issue Discount. For purposes of Sections 1272, 1273 and 1275 of the Internal Revenue Code, each Term Loan is being issued with original issue discount; please contact the chief financial officer of the Borrower to obtain information regarding the issue price, the amount of original issue discount and the yield to maturity. Section 10.16 Headings. Section headings herein are included herein for convenience of reference only and shall not constitute a part hereof for any other purpose or be given any substantive effect. Section 10.17 APPLICABLE LAW. THIS AGREEMENT (INCLUDING SECTION 10.17) AND THE RIGHTS AND OBLIGATIONS OF THE PARTIES HEREUNDER SHALL BE GOVERNED BY, AND SHALL BE CONSTRUED AND ENFORCED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK APPLICABLE TO CONTRACTS MADE AND TO BE PERFORMED IN THE STATE OF NEW YORK. Section 10.18 CONSENT TO JURISDICTION. (a) ALL JUDICIAL PROCEEDINGS BROUGHT AGAINST ANY LOAN PARTY ARISING OUT OF OR RELATING HERETO OR ANY OTHER LOAN DOCUMENT, OR ANY OF THE OBLIGATIONS, MAY BE BROUGHT IN ANY STATE OR FEDERAL COURT OF COMPETENT JURISDICTION IN THE STATE, COUNTY AND CITY OF NEW YORK. BY EXECUTING AND DELIVERING THIS AGREEMENT, EACH LOAN PARTY, FOR ITSELF AND IN CONNECTION WITH ITS PROPERTIES, IRREVOCABLY (I) ACCEPTS GENERALLY AND UNCONDITIONALLY THE NON-EXCLUSIVE JURISDICTION AND VENUE OF SUCH COURTS; (II) WAIVES ANY DEFENSE OF FORUM NON CONVENIENS; (III) AGREES THAT SERVICE OF ALL PROCESS IN ANY SUCH PROCEEDING IN ANY SUCH COURT MAY BE MADE BY REGISTERED OR CERTIFIED MAIL, RETURN RECEIPT REQUESTED, TO THE APPLICABLE LOAN PARTY AT ITS ADDRESS PROVIDED IN ACCORDANCE WITH SECTION 10.1 OR TO ANY PROCESS AGENT SELECTED FOR SUCH LOAN PARTY IN ACCORDANCE WITH SECTION 3.1(U) IS SUFFICIENT TO CONFER PERSONAL JURISDICTION OVER THE APPLICABLE LOAN PARTY IN ANY SUCH PROCEEDING IN ANY SUCH COURT, AND OTHERWISE CONSTITUTES EFFECTIVE AND BINDING SERVICE IN EVERY RESPECT; AND (iv) AGREES THAT ADMINSTRATIVE AGENT AND XXXXXXX RETAIN THE RIGHT TO SERVE PROCESS IN ANY OTHER MANNER PERMITTED BY LAW OR TO BRING PROCEEDINGS AGAINST ANY LOAN PARTY IN THE COURTS OF ANY OTHER JURISDICTION. Section 10.19 WAIVER OF JURY TRIAL. EACH OF THE PARTIES HERETO HEREBY AGREES TO WAIVE ITS RESPECTIVE RIGHTS TO A JURY TRIAL OF ANY CLAIM OR CAUSE

- 129 - the Loans made hereunder or be refunded to Company. In determining whether the interest contracted for, charged, or received by Administrative Agent or a Lender exceeds the Highest Lawful Rate, such Person may, to the extent permitted by applicable law, (a) characterize any payment that is not principal as an expense, fee, or premium rather than interest, (b) exclude voluntary prepayments and the effects thereof, and (c) amortize, prorate, allocate, and spread in equal or unequal parts the total amount of interest, throughout the contemplated term of the Obligations hereunder. Section 10.22 Counterparts. This Agreement may be executed in any number of counterparts, each of which when so executed and delivered shall be deemed an original, but all such counterparts together shall constitute but one and the same instrument. This Agreement shall become effective upon the execution of a counterpart hereof by each of the parties hereto. Delivery of an executed counterpart of a signature page of this Agreement by facsimile or other electronic imaging means shall be effective as delivery of a manually executed counterpart of this Agreement. The words “execution,” “execute”, “signed,” “signature,” and words of like import in or related to any document to be signed in connection with this Agreement and the other Loan Documents and the transactions contemplated hereby and thereby (including without limitation Assignment Agreement, amendments, Notices, waivers and consents) shall be deemed to include electronic signatures, the electronic matching of assignment terms and contract formations on electronic platforms approved by Administrative Agent, or the keeping of records in electronic form, each of which shall be of the same legal effect, validity or enforceability as a manually executed signature or the use of a paper-based recordkeeping system, as the case may be, to the extent and as provided for in any applicable law, including the Federal Electronic Signatures in Global and National Commerce Act, the New York State Electronic Signatures and Records Act, or any other similar state laws based on the Uniform Electronic Transactions Act. Section 10.23 Effectiveness. This Agreement shall become effective upon the execution of a counterpart hereof by each of the parties hereto and receipt by Company and Administrative Agent of written notification of such execution and authorization of delivery thereof. Section 10.24 PATRIOT Act Notice. Each Lender and Administrative Agent (for itself and not on behalf of any Lender) hereby notifies the Loan Parties that pursuant to the requirements of the PATRIOT Act, it may be required to obtain, verify and record information that identifies each Loan Party, which information includes the name and address of the Loan Parties and other information that will allow such Lender or Administrative Agent, as applicable, to identify the Loan Parties in accordance with the PATRIOT Act or other Anti-Terrorism Laws of the Loan Parties and other information that will allow such Lender or Administrative Agent, as applicable, to identify the Loan Parties in connection with the PATRIOT Act. Section 10.25 Waiver of Immunity. To the extent that any Loan Party has or hereafter may acquire (or may be attributed, whether or not claimed) any immunity (sovereign or otherwise) from any legal action, suit or proceeding, from jurisdiction of any court or from set-off or any legal process (whether service of process or notice, attachment prior to judgment, attachment in aid of execution of judgment, execution of judgment or otherwise) with respect to itself or any of its property, such Loan Party hereby irrevocably waives and agrees not to plead or claim, to the fullest extent permitted by law, such immunity in respect of (a) its obligations under the Loan Documents, (b) any legal proceedings to enforce such obligations and (c) any legal proceedings to enforce any judgment rendered in any proceedings to enforce such obligations. Each Loan Party hereby agrees that the waivers set forth in this Section 10.25 shall be to the fullest extent permitted under the Foreign Sovereign Immunities Act and are intended to be irrevocable for purposes of the Foreign Sovereign Immunities Act. [Remainder of page intentionally left blank]

S-1 IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly executed and delivered by their respective officers thereunto duly authorized as of the date first written above. BORROWER: ARROWHEAD PHARMACEUTICALS, INC. By: /s/ Xxxxxxx X. Xxxxxxxxxx Name: Xxxxxxx X. Xxxxxxxxxx Title: Chief Financial Officer GUARANTOR SUBSIDIARIES: ARROWHEAD MADISON INC. By: /s/ Xxxxxxx X. Xxxxxxxxxx Name: Xxxxxxx X. Xxxxxxxxxx Title: Chief Financial Officer

S-2 SIXTH STREET LENDING PARTNERS, as Administrative Agent By: /s/ Xxxxxx (Bo) Xxxxxxx Name: Xxxxxx (Bo) Xxxxxxx Title: Vice President

S-3 SSLP LENDING, LLC, as Lender By: /s/ Xxxxxx (Bo) Xxxxxxx Name: Xxxxxx (Bo) Xxxxxxx Title: President TDL LENDING, LLC, SERIES 33, as Lender By: /s/ Xxxxxx (Bo) Xxxxxxx Name: Xxxxxx (Bo) Xxxxxxx Title: Vice President OPPS V LENDING, LLC, SERIES 3, as Lender By: /s/ Xxxxxx (Bo) Xxxxxxx Name: Xxxxxx (Bo) Xxxxxxx Title: Vice President TC LENDING, LLC as Lender By: /s/ Xxxxxx (Bo) Xxxxxxx Name: Xxxxxx (Bo) Xxxxxxx Title: President

APPENDIX A-1 APPENDIX A-1 TO FINANCING AGREEMENT Initial Term Loan Commitment Lender Initial Term Loan Commitment SSLP Lending, LLC $[**] TDL Lending, LLC, Series 33 $[**] Opps V Lending, LLC, Series 3 $[**] TC Lending, LLC $[**] Total $400,000,000.00

APPENDIX A-2 APPENDIX A-2 TO FINANCING AGREEMENT Delayed Draw Term Loan Commitments Lender Delayed Draw Term Loan Commitment SSLP Lending, LLC $[**] TDL Lending, LLC, Series 33 $[**] Opps V Lending, LLC, Series 3 $[**] TC Lending, LLC $[**] Total $435,261,000.00

APPENDIX B APPENDIX B TO FINANCING AGREEMENT Notice Addresses ARROWHEAD PHARMACEUTICALS, INC. 000 Xxxx Xxxxxxxx Xxxxxxxxx, Xxxxx 000 Xxxxxxxx, XX 00000 Attention: General Counsel Email: [**] with a copy (which shall not constitute notice) to: Xxxxxx Xxxx & Xxxxxxxx LLP 000 Xxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Xxxx Xxxx and Xxx Xxx Xxx Email: XXxxx@xxxxxxxxxx.xxx and XxXxx@xxxxxxxxxx.xxx

SSLP Lending, LLC; TDL Lending, LLC Series 33; Opps V Lending, LLC, Series 3; TC Lending, LLC, each as a Lender, 0000 XxXxxxxx Xxxxxx, Xxxxx 0000 Xxxxxx, Xxxxx 00000 Attention: TSLX Accounting Email: [**] with a copy (which shall not constitute notice) to: Sixth Street Specialty Lending, Inc. 000 0xx Xxxxxx 00xx Xxxxx Xxx Xxxx, Xxx Xxxx 00000 Attention: [**] Email: [**]

Sixth Street Lending Partners, as Administrative Agent and a Lender Administrative Agent’s Principal Office: 0000 XxXxxxxx Xxxxxx, Xxxxx 0000 Xxxxxx, Xxxxx 00000 Attention: TSLX Accounting Email: [**] with a copy (which shall not constitute notice) to: Sixth Street Lending Partners 0000 XxXxxxxx Xxxxxx, Xxxxx 0000 Xxxxxx, Xxxxx 00000 Attention: [**] Email: [**] and Attention: [**] Email: [**] in each case, with a copy (which shall not constitute notice) to: Proskauer Rose LLP Eleven Times Square New York, New York 10036 Attention: Xxxxxxxx X. Xxxxxxx, Esq. Email: xxxxxxxx@xxxxxxxxx.xxx Xxxxx, Xxxxx, Xxxx, Xxxxxx, Glovsky & Xxxxx, PC 000 Xxxxx Xxxxxx Xxx Xxxx, Xxx Xxxx 00000 Attention: Xxxxxxx X. Xxxxxxx, Esq. Email: xxxxxxxx@xxxxx.xxx

Execution Version CERTAIN INFORMATION IN THIS DOCUMENT, MARKED BY [**], HAS BEEN EXCLUDED PURSUANT TO REGULATION S-K, ITEM 601(b)(10)(iv). SUCH EXCLUDED INFORMATION IS NOT MATERIAL AND IS THE TYPE THAT THE REGISTRANT TREATS AS PRIVATE OR CONFIDENTIAL. SIXTH STREET LENDING PARTNERS 0000 XxXxxxxx Xxxxxx, Xxxxx 0000 Xxxxxx, Xxxxx 00000 PERSONAL AND CONFIDENTIAL August 7, 2024 Arrowhead Pharmaceuticals, Inc. 000 Xxxx Xxxxxxxx Xxxxxxxxx, Xxxxx 000 Xxxxxxxx, XX 00000 Attention: Xx. Xxxxx Xxxxxxxx, VP and Head of Investor Relations, Arrowhead Pharmaceuticals Xx. Xxxxxxxxxxx Xxxxxxxx, CEO, Arrowhead Pharmaceuticals Xx. Xxx Xxxxxxxxxx, CFO, Arrowhead Pharmaceuticals Fee Letter Dear Ladies and Gentlemen: Reference is hereby made to the Financing Agreement, dated as of the date hereof (as amended, restated, replaced, supplemented or otherwise modified from time to time, the “Financing Agreement”; terms not otherwise defined herein shall have the meaning set forth in the Financing Agreement) by and among ARROWHEAD PHARMACEUTICALS, INC., a Delaware corporation (“Borrower”), certain Subsidiaries of Borrower, as Guarantors, the lenders from time to time party thereto (the “Lenders”), SIXTH STREET LENDING PARTNERS (“Sixth Street”), as administrative agent for the Lenders (in such capacity, “Administrative Agent”). Borrower and Administrative Agent hereby agree to the following: 1. Xxxxxxxx agrees to pay to Administrative Agent, solely for its own account, an administration fee (the “Administration Fee”) in an amount equal to $[**] each quarter , payable quarterly in advance on the Closing Date (for the period from the Closing Date through September 30, 2024), and on the first Business Day of each October, January, April and July thereafter, until payment in full of the Obligations under the Financing Agreement, or otherwise as agreed by Xxxxxxxx and Administrative Agent. 2. As consideration for the services, agreements and undertakings of each Lender that is TC Lending, LLC, SSLP Lending, LLC, Opps V Lending, LLC, Series 3 and TDL Lending, LLC, Series 33 (each, a “Sixth Street Lender” and collectively, the “Sixth Street Lenders”) under the Financing Agreement, Borrower agrees to pay (or cause to be paid) to Administrative Agent, for the account of each Sixth Street Lender, on the Closing Date, a fee equal to [**]% of the aggregate principal amount of Initial Term Loans of each such Sixth Street Lender that is actually funded under the Financing Agreement on the Closing Date (the “Arrangement

Arrowhead Pharmaceuticals, Inc. August 7, 2024 Page 2 Fee”). The Arrangement Fee shall be fully earned and shall be paid (and once paid shall be non- refundable) on the Closing Date. For the avoidance of doubt, the Arrangement Fee may, in each Sixth Street Lender’s sole discretion, be netted out of the proceeds of the Initial Term Loans funded on the Closing Date by such Sixth Street Lender. 3. Borrower agrees to pay (or cause to be paid) to Administrative Agent, for the account of each Sixth Street Lender, on the Closing Date, an upfront fee in an amount equal to [**]% of the aggregate principal amount of the Initial Term Loans funded on the Closing Date by each such Sixth Street Lender (the “Sixth Street Upfront Fee”), which is fully earned and due and payable to Administrative Agent, for the account of each such Sixth Street Lender, on the Closing Date. For the avoidance of doubt, the Sixth Street Upfront Fee may, in each Sixth Street Lender’s sole discretion, be netted out of the proceeds of the Initial Term Loans funded on the Closing Date by such Sixth Street Lender. The Sixth Street Upfront Fee is intended to be treated as original issue discount for U.S. federal income tax purposes. 4. If, on or prior to August 7, 2029, the Lenders have not earned and been paid an aggregate minimum multiple of invested capital as calculated below (“MOIC”) of at least 1.00 times the aggregate principal amount of the Initial Term Loans made on the Closing Date (the “1.0x MOIC”), Borrower shall prepay the Term Loan as set forth in Section 2.11(a) of the Financing Agreement, within one (1) Business Days after such date, with a one-time payment (such payment, the “True Up Payment”) equal to the amount necessary for the Lenders to achieve the 1.0x MOIC. The Administrative Agent shall provide the Borrower with an estimate, together with a supporting calculation, of the amount of the True Up Payment as of July 8, 2029. The amount so earned and paid shall mean, as of any date of determination, all fees, interest (including the amount of proceeds of Delayed Draw Term Loans funded to finance such interest payments), premiums and principal made to the Lenders in respect of the Initial Term Loan since the Closing Date up to and including amounts paid on such date of determination (including, unless expressly stated otherwise, the True Up Payment but excluding other amounts payable under the Loan Documents, including without limitation, the Administration Fee, indemnification obligations. reimbursement obligations for expenses and reimbursements obligations for other amounts paid or payable by the Administrative Agent or Lenders under the Financing Agreement). The True Up Payment shall be paid to the Administrative Agent for the account of the Lenders based on their pro rata share of the Initial Term Loans. 5. If, prior to the Term Loan Maturity Date, Borrower pays (or is deemed to pay in the case of an acceleration of the Term Loans), for any reason (including, but not limited to, any optional or mandatory payment, but excluding any True Up Payment and any mandatory payment made pursuant to Sections 2.10(e), (f), (g), (h), (i) and (j) of the Financing Agreement) solely after the occurrence of an Event of Default or after acceleration of the Term Loans in connection with an Event of Default (including in connection with the commencement of any Insolvency Proceeding or other proceeding pursuant to any Debtor Relief Laws), all or any part of the principal balance of any Term Loan, Borrower shall pay to Administrative Agent, for the ratable benefit of all Lenders entitled to a portion of such prepayment, an amount (the “E of D Yield Maintenance Premium”) in cash equal to the present value, as of the date of the applicable payment or acceleration (the “E of D Calculation Date”), of all interest payments (including, without limitation, interest payable in cash, in kind or deferred) which would have otherwise been

Arrowhead Pharmaceuticals, Inc. August 7, 2024 Page 3 payable on the amount of the principal prepaid or accelerated from the date of prepayment (or deemed prepayment in the case of an acceleration) (determined using a rate of interest per annum equal to the rate of interest in effect pursuant to the terms of the Financing Agreement as of the date of such prepayment or acceleration) (the “E of D Subject Amount”) until the Term Loan Maturity Date (excluding interest on the E of D Subject Amount through the E of D Calculation Date, to the extent paid in cash on the E of D Calculation Date) discounted at the Treasury Rate plus 0.50% as of the E of D Calculation Date. Notwithstanding the foregoing, to the extent the E of D Yield Maintenance Premium becomes due and payable as a result of the occurrence of an Event of Default or acceleration of the Loans in connection with an Event of Default (including in connection with the commencement of any Insolvency Proceeding or other proceeding pursuant to any Debtor Relief Laws), the interest rate to be used in calculating the Yield Maintenance Premium shall be the interest rate applicable to the Term Loans plus [**]% per annum for the period from the occurrence of such Event of Default or acceleration (including in connection with the commencement of any Insolvency Proceeding or other proceeding pursuant to any Debtor Relief Laws) until the Term Loan Maturity Date. The term “Treasury Rate” shall mean, as of any date of determination, a rate per annum (computed on the basis of actual days elapsed over a year of 360 days) equal to the rate determined by the Administrative Agent on the date three (3) Business Days prior to the date of prepayment, to be the yield expressed as a rate listed in The Wall Street Journal (or, if such rate is not available in The Wall Street Journal, such other recognized data source as selected by the Administrative Agent in its sole discretion) for United States Treasury securities having a term of no greater than the period for the remaining months until the Term Loan Maturity Date. Nothing contained in this Section 5 shall permit any voluntary prepayment not otherwise permitted by the terms of the Financing Agreement. 6. If at any time (including on the Maturity Date), Borrower pays the Term Loan and all other payment Obligations (including any applicable E of D Yield Maintenance Premium but excluding any contingent obligations that are not required to be paid by the Borrower under the Financing Agreement) under the Financing Agreement in full, solely in the absence of the occurrence of an Event of Default or in the absence of an acceleration of the Term Loan in connection with an Event of Default (including in connection with the commencement of any Insolvency Proceeding or other proceeding pursuant to any other Debtor Relief Laws) (a) if such payment in full occurs from the Closing Date through and including August 7, 2028, and the Lenders have not earned and been paid (as calculated above and including the True Up Payment) a MOIC of at least 2.00 times the principal amount of the Initial Term Loan made on the Closing Date (the “2.0x MOIC”) on the date of such payment in full, Borrower shall pay to the Lenders on the date of such payment in full the amount necessary for Lenders to achieve the 2.0x MOIC after giving effect to all payments made on such date of payment and (b) if such payment in full occurs after August 7, 2028, Borrower shall pay to the Lenders on the date of such payment in full an amount equal to the greater of (x) the amount necessary for the Lenders to achieve the 2.0x MOIC on the date of such payment in full after giving effect to all payments made on such date of payment and (y) an amount (the “Non-E of D Yield Maintenance Premium” and, together with the E of D Yield Maintenance Premium, the ”Yield Maintenance Premium”) in cash equal to the present value, as of the date of the applicable payment (the “Non-E of D Calculation Date”), of all interest payments (including, without limitation, interest payable in cash, in kind or deferred) which would have otherwise been payable on the amount of the principal prepaid or repaid from the Non-E of D Calculation Date (determined using a rate of interest per annum equal to the rate

Arrowhead Pharmaceuticals, Inc. August 7, 2024 Page 4 of interest in effect pursuant to the terms of the Financing Agreement as of the date of such prepayment) (the “Non-E of D Subject Amount”) until the Term Loan Maturity Date (excluding interest on the Non-E of D Subject Amount through the Non-E of D Calculation Date, to the extent paid in cash on the Non-E of D Calculation Date) discounted at the Treasury Rate plus 0.50% as of the Non-E of D Calculation Date. 7. Without limiting the generality of the foregoing, it is understood and agreed that if the Obligations are accelerated for any reason, including because of default, the commencement of any Insolvency Proceeding or other proceeding pursuant to any Debtor Relief Laws, sale, disposition or encumbrance (including that by operation of law or otherwise), the E of D Yield Maintenance Premium, if any, determined as of the date of acceleration will also be due and payable as though said Indebtedness was voluntarily prepaid as of such date and shall constitute part of the Obligations, in view of the impracticability and extreme difficulty of ascertaining actual damages and by mutual agreement of the parties as to a reasonable calculation of each Xxxxxx's lost profits as a result thereof. Any E of D Yield Maintenance Premium payable in accordance with the immediately preceding sentence shall be presumed to be the liquidated damages sustained by each Lender as the result of the early termination and Xxxxxxxx agrees that it is reasonable under the circumstances currently existing. The E of D Yield Maintenance Premium, if any, shall also be payable (i) in the event the Obligations (and/or the Financing Agreement or the Notes evidencing the Obligations) are satisfied or released by foreclosure (whether by power of judicial proceeding or otherwise), deed in lieu of foreclosure or by any other means and/or (ii) upon the satisfaction, release, payment, restructuring, reorganization, replacement, reinstatement, defeasance or compromise of any of the Obligations (and/or the Financing Agreement or the Notes evidencing the Obligations) in any Insolvency Proceeding or other proceeding pursuant to any Debtor Relief Laws, foreclosure (whether by power of judicial proceeding or otherwise), deed in lieu of foreclosure or by any other means or the making of a distribution of any kind in any Insolvency Proceeding or other proceeding pursuant to any Debtor Relief Laws to the Administrative Agent, for the account of the Lenders, in full or partial satisfaction of the Obligations. BORROWER EXPRESSLY WAIVES THE PROVISIONS OF ANY PRESENT OR FUTURE STATUTE OR LAW THAT PROHIBITS OR MAY PROHIBIT THE COLLECTION OF THE FOREGOING E of D YIELD MAINTENANCE PREMIUM IN CONNECTION WITH ANY SUCH ACCELERATION INCLUDING IN CONNECTION WITH ANY VOLUNTARY OR INVOLUNTARY ACCELERATION OF THE OBLIGATIONS PURSUANT TO ANY INSOLVENCY PROCEEDING OR OTHER PROCEEDING PURSUANT TO ANY DEBTOR RELIEF LAWS OR PURSUANT TO A PLAN OF REORGANIZATION. Borrower expressly agrees that: (A) the E of D Yield Maintenance Premium is reasonable and is the product of an arm's length transaction between sophisticated business people, ably represented by counsel; (B) the E of D Yield Maintenance Premium shall be payable notwithstanding the then prevailing market rates at the time payment is made; (C) there has been a course of conduct between Lenders and Borrower giving specific consideration in this transaction for such agreement to pay the E of D Yield Maintenance Premium; and (D) Borrower shall be estopped hereafter from claiming differently than as agreed to in this paragraph. Borrower expressly acknowledges that its agreement to pay the E of D Yield Maintenance Premium to Lenders as herein described is a material inducement to Lenders to provide the Commitments and make the Term Loans and other extensions of credit.

Arrowhead Pharmaceuticals, Inc. August 7, 2024 Page 5 8. Xxxxxxxx further acknowledges and agrees that no fees will be paid to any other Lender in connection with the Financing Agreement and the other Loan Documents except as may be agreed in writing by Sixth Street. All fees payable hereunder shall be fully earned when due and non-refundable when paid and shall be in addition to any other fees, costs and expenses payable pursuant to the Financing Agreement or the other Loan Documents. Sixth Street reserves the right to allocate, in whole or in part, to any of its affiliates certain fees payable to Sixth Street hereunder in such manner as Sixth Street and such affiliates shall agree in their sole discretion. 9. To the extent permitted by applicable law, Borrower's obligation to pay the foregoing fees will not be subject to counterclaim or setoff for, or be otherwise affected by, any claim or dispute Borrower may have. In addition, all such payments shall be made without deduction for any taxes, levies, imposts, duties, deductions, charges or withholdings imposed by any national, state or local taxing authority (“Taxes”) unless otherwise required by applicable law, and, if Borrower is required by applicable law to deduct or withhold such Taxes, such payments will be grossed up by Borrower for such amounts to the extent provided in the Financing Agreement (as if the payments had been made pursuant to the Financing Agreement). 10. Please note that this Fee Letter is exclusively for the information of the senior management of Xxxxxxxx and may not be disclosed to any third party other than to Borrower's officers, directors, agents and advisors who are directly involved in the negotiation of the Loan Documents to the extent such persons agree to hold the same in confidence or circulated or referred to publicly, except to the extent expressly set forth in the Financing Agreement. 11. This Fee Letter shall be governed by and construed in accordance with the laws of the State of New York without regard to principles of conflicts of law. If this Fee Letter becomes the subject of a dispute, each of the parties hereto hereby waives trial by jury. Xxxxxxxx agrees that any suit or proceeding arising in respect to this Fee Letter or any matter referred to in this Fee Letter will be tried exclusively in the U.S. District Court for the Southern District of New York or, if that court does not have subject matter jurisdiction, in any state court located in the City of New York and Borrower agrees to submit to the jurisdiction of, and to venue in, such courts. 12. This Fee Letter may be executed in any number of counterparts, each of which when executed shall be an original, and all of which, when taken together, shall constitute one agreement. Delivery of an executed counterpart of a signature page of this Fee Letter by facsimile or electronic transmission shall be effective as delivery of a manually executed counterpart hereof. [Remainder of page intentionally left blank]

Please confirm that the foregoing is in accordance with your understanding by signing and returning to us the enclosed copy of this Fee Letter, which shall become a binding agreement upon our receipt. Very truly yours, SIXTH STREET LENDING PARTNERS By: /s/ Xxxxxx (Bo) Xxxxxxx Name: Xxxxxx (Bo) Xxxxxxx Title: Vice President

ACCEPTED AS OF THE DATE ABOVE: ARROWHEAD PHARMACEUTICALS, INC. By: /s/ Xxxxxxx X. Xxxxxxxxxx Name: Xxxxxxx X. Xxxxxxxxxx Title: Chief Financial Officer