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(Exact name of registrant as specified in its charter)

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company  ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐

On November 19, 2025, the Board of Directors (the “Board”) of Peabody Energy Corporation (the “Company”) appointed Georganne Hodges and Clayton Walker (the “New Directors”) to serve as directors of the Company, effective immediately, with terms expiring at the Company’s 2026 Annual Meeting of Stockholders. Ms. Hodges will serve as a member of the Board’s Audit Committee and Nominating and Corporate Governance Committee. Mr. Walker will serve as a member of the Board’s Compensation Committee and Health, Safety, Security and Environmental Committee.

There are no arrangements or understandings between either of the New Directors and any other persons pursuant to which either of the New Directors were named a director of the Company. Neither of the New Directors has any family relationship with any of the Company’s directors or executive officers or any persons nominated or chosen by the Company to be a director or executive officer. Neither of the New Directors has any direct or indirect material interest in any transaction or proposed transaction required to be reported under Item 404(a) of Regulation S-K.

Each of the New Directors will participate in the Company’s non-employee director compensation program, which is described on pages 25 through 27 of the Company’s proxy statement for its 2025 Annual Meeting of Stockholders, filed with the SEC on March 27, 2025. In connection with their appointment to the Board, each of the New Directors received a prorated grant of deferred stock units (“DSUs”), awarded on November 19, 2025. The number of DSUs granted to each of the New Directors was determined by dividing either $62,500 or $66,250 (depending on the director’s allocation election under the terms of the deferred stock unit agreement) by the closing price per share for the Company’s common stock on November 19, 2025 (rounding down to the nearest whole DSU). The DSUs granted to the New Directors generally vest monthly over a six-month period beginning on December 9, 2025. However, the underlying shares generally are not distributed until the earlier of (1) three years after the grant date and (2) the director’s separation from service, subject to any deferral election under the terms of the deferred stock unit agreement. A copy of the form of deferred stock unit agreement was filed as Exhibit 10.58 to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2024. In addition, the Company will enter into its standard director indemnification agreement with each of the New Directors.

A copy of the Company’s press release regarding the foregoing is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

(d) Exhibits.

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.