CNR · Amended Annual Report (Form 10-K/A) · Filed February 27, 2026

Core Natural Resources Inc — 10-K/A exhibit

cnr1231202510-kaxexhibit234.htm

Core Natural Resources Inc on Boardroom Alpha

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Exhibit 23.4

CONSENT OF THIRD-PARTY QUALIFIED PERSON

February 27, 2026

Project No. 6456

Via Email: MichaelBohan@coreresources.com

Executive Towers West I

1431 Opus Place, Suite 210

Downers Grove, Illinois 60515

USA

Mr. Mike Bohan

Core Natural Resources, Inc.

275 Technology Drive

Canonsburg, Pennsylvania 15317

Reference: Consent of Independent Experts

Dear Mr. Bohan:

With respect to the SEC filings by Core Natural Resources, Inc. (the "Company"), including but not limited to its Annual Report on Form 10-K for the year ended December 31, 2025, Weir International, Inc., as independent mining engineers and geologists, hereby consents to the use of information contained in the Technical Report Summary for the Leer Complex, dated February 6, 2026 and amended February 27, 2026. We also consent to the reference to Weir International, Inc. in those filings and any amendments thereto.

We further wish to advise that Weir International, Inc. was not employed on a contingent basis and that at the time of preparation of our report, as well as at present, neither Weir International, Inc. nor any of its employees had, or now has, a substantial interest in Core Natural Resources, Inc. or any of its affiliates or subsidiaries.

Respectfully submitted,

Weir International, Inc.

/s/ Fran X. Taglia

Fran X. Taglia

President

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