FOURTH SUPPLEMENTAL INDENTURE ADDITIONAL SUBSIDIARY GUARANTEES

Exhibit 4.4

FOURTH SUPPLEMENTAL INDENTURE
ADDITIONAL SUBSIDIARY GUARANTEES

FOURTH SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of March 29, 2024, among the subsidiary guarantors listed on Schedule I hereto (the “Guaranteeing Subsidiaries”), Vistra Operations Company LLC, a Delaware limited liability company (the “Company” ), the other subsidiary guarantors party hereto and The Bank of New York Mellon Trust Company, N.A., as trustee under the Indenture (the “Trustee”).

W I T N E S S E T H

WHEREAS, the Company has heretofore executed and delivered to the Trustee (i) that certain indenture (the “Base Indenture”), dated as of June 15, 2023, between the Company and the Trustee and (ii) that certain first supplemental indenture, dated as of June 15, 2023 (the “First Supplemental Indenture” and, together with the Base Indenture, the “Indenture”), among the Company, the Subsidiary Guarantors party thereto and the Trustee, providing for the original issuance of an aggregate principal amount of $450,000,000 of 7.233% Senior Secured Notes due 2028 (the “Notes”);

WHEREAS, the Indenture provides that under certain circumstances the Guaranteeing Subsidiaries shall execute and deliver to the Trustee a supplemental indenture pursuant to which the Guaranteeing Subsidiaries shall unconditionally guarantee all of the Company’s Obligations under the Notes and the Indenture (the “Subsidiary Guarantees”); and

WHEREAS, pursuant to Section 9.01(8) of the Base Indenture and Section 4.07 and Section 9.01(8) of the First Supplemental Indenture, the Trustee, the Company and the other Subsidiary Guarantors are authorized and required to execute and deliver this Supplemental Indenture.

NOW THEREFORE, in consideration of the foregoing and for good and valuable consideration, the receipt of which is hereby acknowledged, the Guaranteeing Subsidiaries, the Trustee, the Company and the other Subsidiary Guarantors mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows:

1. Capitalized Terms. Unless otherwise defined in this Supplemental Indenture, capitalized terms used herein without definition shall have the meanings assigned to them in the Base Indenture or First Supplemental Indenture, as applicable.

2. Agreement to be Bound; Guarantee. The Guaranteeing Subsidiaries hereby become a party to the Indenture as a Subsidiary Guarantor and as such will have all of the rights and be subject to all of the Obligations and agreements of a Subsidiary Guarantor under the Indenture. The Guaranteeing Subsidiaries hereby agree to be bound by all of the provisions of the First Supplemental Indenture applicable to a Subsidiary Guarantor and to perform all of the Obligations and agreements of a Subsidiary Guarantor under the Indenture. In furtherance of the foregoing, each Guaranteeing Subsidiary shall be deemed a Subsidiary Guarantor for purposes of Article 10 of the First Supplemental Indenture, including, without limitation, Section 10.02 thereof.

3. NEW YORK LAW TO GOVERN. THIS SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.

4. Counterparts. The parties may sign any number of copies of this Supplemental Indenture. Each signed copy shall be an original, but all of them together represent the same agreement.

5. Effect of Headings. The Section headings herein are for convenience only and shall not affect the construction hereof.

6. The Trustee. The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by the Guaranteeing Subsidiaries and the Company.

7. Ratification of Indenture; Supplemental Indenture Part of Indenture. Except as expressly amended hereby, the Indenture is in all respects ratified and confirmed and all the terms, conditions and provisions thereof shall remain in full force and effect. This Supplemental Indenture shall form a part of the Indenture for all purposes, and every Holder of Notes heretofore or hereafter authenticated and delivered shall be bound hereby.

[Signature Page Follows]

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IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly executed, all as of the date first above written.

Dated: March 29, 2024

VISTRA VISION HOLDINGS I LLC

VISTRA VISION MANAGEMENT LLC

PULASKI SOLAR, LLC

MASSAC TRANSMISSION, LLC,

as the Guaranteeing Subsidiaries

By:    /s/ Xxxxxxx X. Xxxxx    

Name:    Xxxxxxx X. Xxxxx

Title:    Senior Vice President and Treasurer

VISTRA OPERATIONS COMPANY LLC,

as the Company

By:    /s/ Xxxxxxx X. Xxxxx    

Name:    Xxxxxxx X. Xxxxx

Title:    Senior Vice President and Treasurer

Bellingham Power Generation LLC

Big Brown Power Company LLC

Blackstone Power Generation LLC

Calumet Energy Team, LLC

Casco Bay Energy Company, LLC

Coffeen and Western Railroad Company

Coleto Creek Power, LLC

Coleto Creek Energy Storage LLC

Dallas Power & Light Company, Inc.

Dicks Creek Power Company LLC

Dynegy Coal Holdco, LLC

Dynegy Coal Trading & Transportation, L.L.C.

Dynegy Conesville, LLC

Dynegy Xxxxxx, LLC

Dynegy Marketing and Trade, LLC

Dynegy Midwest Generation, LLC

Dynegy Operating Company

Dynegy Power Marketing, LLC

Dynegy Resources Generating Holdco, LLC

Dynegy South Bay, LLC

Dynegy Stuart, LLC

Xxxxx Power Company, LLC

[Signature Page to Fourth Supplemental Indenture]

EquiPower Resources Corp.

Fayette Power Company LLC

Generation SVC Company

Hanging Rock Power Company LLC

Xxxx Energy, LLC

Hopewell Power Generation, LLC

Illinois Power Generating Company

Illinois Power Resources Generating, LLC

Illinois Power Resources, LLC

Illinova Corporation

IPH, LLC

Xxxxxxx Power Company LLC

Xxxxxxx Generation, L.L.C.

La Frontera Holdings, LLC

Lake Road Generating Company, LLC

Liberty Electric Power, LLC

Lone Star Energy Company, Inc.

Lone Star Pipeline Company, Inc.

Luminant Administrative Services Company

Luminant Coal Generation LLC

Luminant Commercial Asset Management LLC

Luminant Energy Company LLC

Luminant Energy Trading California Company

Luminant ET Services Company LLC

Luminant Gas Imports LLC

Luminant Generation Company LLC

Luminant Mining Company LLC

Luminant Power Generation, LLC

Luminant Power LLC

Maroon Farmer, LLC

Masspower, LLC

Miami Fort Power Company LLC

Midlothian Energy, LLC

Milford Power Company, LLC

Morro Bay Energy Storage 1, LLC

Morro Bay Energy Storage 2, LLC

Morro Bay Power Company LLC

Xxxx Landing Energy Storage 4, LLC

Xxxx Landing Power Company LLC

NCA Resources Development Company LLC

NEPCO Services Company

Northeastern Power Company

Oak Grove Management Company LLC

Oakland Energy Storage 2, LLC

Oakland Energy Storage 3, LLC

Oakland Power Company LLC

Ontelaunee Power Operating Company, LLC

Xxxxxxxxx Energy, LLC

Sandow Power Company LLC

[Signature Page to Fourth Supplemental Indenture]

Sayreville Power Generation LP

Sayreville Power GP Inc.

Sayreville Power Holdings LLC

Sithe Energies, Inc.

Sithe/Independence LLC

Southwestern Electric Service Company, Inc.

Texas Electric Service Company, Inc.

Texas Energy Industries Company, Inc.

Texas Power & Light Company, Inc.

Texas Utilities Company, Inc.

Texas Utilities Electric Company, Inc

Trinidad Power Storage LLC

TXU Electric Company, Inc.

Vistra Asset Company LLC

Vistra Corporate Services Company

Vistra EP Properties Company

Vistra Finance Corp.

Vistra Insurance Solutions LLC

VZ Development LLC

Washington Power Generation LLC

Wise County Power Company, LLC

Wise-Fuels Pipeline, Inc.

Xxxxxx Power Company LLC, as Subsidiary Guarantors

By:    /s/ Xxxxxxx X. Xxxxx    

Name:    Xxxxxxx X. Xxxxx

Title:    Senior Vice President and Treasurer

[Signature Page to Fourth Supplemental Indenture]

THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A.,
not in its individual capacity but solely as the Trustee

By:    /s/ Xxxxxxx Xxxxxxx    

Name:    Xxxxxxx Xxxxxxx

Title:    Vice President

[Signature Page to Fourth Supplemental Indenture]

SCHEDULE I

GUARANTEEING SUBSIDIARIES

Name			Jurisdiction
VISTRA VISION HOLDINGS I LLC			Delaware
VISTRA VISION MANAGEMENT LLC			Delaware
PULASKI SOLAR, LLC			Delaware
MASSAC TRANSMISSION, LLC			Delaware