FOURTH SUPPLEMENTAL INDENTURE

Exhibit 4.6

FOURTH SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of December 7, 2018, among Peabody Energy Corporation, a Delaware corporation (the “Company”), Peabody Southeast Mining, LLC, a subsidiary of the Company (the “Guaranteeing Subsidiary”), and Wilmington Trust, National Association, as trustee under the Indenture referred to below (the “Trustee”).

W I T N E S S E T H

WHEREAS, the Company has heretofore executed and delivered to the Trustee an indenture, dated as of February 15, 2017 (as amended, supplemented or otherwise modified to the date hereof, the “Indenture”), providing for the issuance of 6.000% Senior Secured Notes due 2022 (the “2022 Notes”) and the issuance of 6.375% Senior Secured Notes due 2025 (together with the 2022 Notes, the “Notes”);

WHEREAS, the Indenture provides that under certain circumstances the Guaranteeing Subsidiary shall execute and deliver to the Trustee a supplemental indenture pursuant to which the Guaranteeing Subsidiary shall unconditionally guarantee all of the Company’s Obligations under the Notes and the Indenture on the terms and conditions set forth herein (the “Note Guarantee”); and

WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee is authorized to execute and deliver this Supplemental Indenture without the consent of Holders.

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

1. CAPITALIZED TERMS. Capitalized terms used herein without definition shall have the meanings assigned to them in the Indenture.

2. AGREEMENT TO GUARANTEE. The Guaranteeing Subsidiary hereby agrees to provide an unconditional Guarantee on the terms and subject to the conditions set forth in the Note Guarantee and in the Indenture including but not limited to Article X thereof.

3. NO RECOURSE AGAINST OTHERS. No director, officer, employee, incorporator or stockholder of the Company or any Guarantor, as such, will have any liability for any obligations of the Company or the Guarantors under the Notes, this Indenture, the Note Guarantees, Security Documents or this Supplemental Indenture or for any claim based on, in

respect of, or by reason of, such obligations or their creation. Each Holder of Notes by accepting a Note waives and releases all such liability. The waiver and release are part of the consideration for issuance of the Notes. The waiver may not be effective to waive liabilities under the federal securities laws.

4. NEW YORK LAW TO GOVERN. THE INTERNAL LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE THIS SUPPLEMENTAL INDENTURE WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY.

5. 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. The exchange of copies of this Supplemental Indenture and of signature pages by facsimile or PDF transmission shall constitute effective execution and delivery of this instrument as to the parties hereto and may be used in lieu of the original instrument for all purposes. Signatures of the parties hereto transmitted by facsimile or PDF shall be deemed to be their original signatures for all purposes.

6. EFFECT OF HEADINGS. The Section headings herein are for convenience only and shall not affect the construction hereof.

7. 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 Subsidiary and the Company.

8. RATIFICATION 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 Pages Follow]

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

PEABODY ENERGY CORPORATION

By: /s/ Xxxxxx X. Xxxxxxx, Xx.

Name: Xxxxxx X. Xxxxxxx, Xx.

Title: Senior Vice President, Finance

[Signature Page to Fourth Supplemental Indenture]

PEABODY SOUTHEAST MINING, LLC

By: /s/ Xxxxxx X. Xxxxxxx, Xx.

Name: Xxxxxx X. Xxxxxxx, Xx.

Title: Senior Vice President, Finance

[Signature Page to Fourth Supplemental Indenture]

WILMINGTON TRUST, NATIONAL ASSOCIATION, as Trustee

By: /s/ Xxxxx Xxxxxxxx