Holly K. Koeppel - 17 Feb 2026 Form 4/A - Amendment Insider Report for Core Natural Resources, Inc. (CNR)

Reporting relationship: Director
Issuer ticker: CNR
Reported as of: 17 Feb 2026
Net transaction value: $0
SEC form: 4/A - Amendment
Accepted by SEC: 24 Feb 2026, 17:24:54 UTC
Original report date: 19 Feb 2026
Prior SEC filing: 10 Jun 2025
Next SEC filing: 01 May 2026
Source filing: View source filing
Reporting owner signature: /s/ Rosemary L. Klein, Attorney-in-Fact for Holly K. Koeppel

Key filing fact

Holly K. Koeppel filed Form 4/A - Amendment for Core Natural Resources, Inc. (CNR) on 24 Feb 2026.

Key facts

This page summarizes Holly K. Koeppel's Form 4/A - Amendment filing for Core Natural Resources, Inc. (CNR).
0 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 24 Feb 2026, 17:24.

Change

Previous filing in this sequence was filed on 10 Jun 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4/A - Amendment disclosures.

View source filing

Reporting Owners (1)

CIK 0001210399 Primary reporting owner

KOEPPEL HOLLY K

Relationship: Director
Address: 275 TECHNOLOGY DRIVE, SUITE 101, CANONSBURG
Signature: /s/ Rosemary L. Klein, Attorney-in-Fact for Holly K. Koeppel
Signature date: 24 Feb 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

CNR holding

Common stock, par value $0.01 per share

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 14,970
Date: 17 Feb 2026
Ownership: Direct
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

On February 19, 2026, due to immaterial clerical rounding errors, the reporting person filed a Form 4 which inadvertently reported an incorrect total amount of securities directly beneficially owned by the reporting person. The corrected amount of securities beneficially owned by the reporting person is 14,970.