Nathan J. Tucker - 18 Aug 2026 Form 3 Insider Report for Core Natural Resources, Inc. (CNR)

Reporting relationship: SVP & Chief Financial Officer
Issuer ticker: CNR
Reported as of: 18 Aug 2026
Net transaction value: $0
SEC form: 3
Accepted by SEC: 20 Aug 2026, 11:18:09 UTC
Source filing: View source filing
Reporting owner signature: /s/ Rosemary L. Klein, Attorney-in-Fact for Nathan J. Tucker

Key filing fact

Nathan J. Tucker filed Form 3 for Core Natural Resources, Inc. (CNR) on 20 Aug 2026.

Key facts

This page summarizes Nathan J. Tucker's Form 3 filing for Core Natural Resources, Inc. (CNR).
0 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 20 Aug 2026, 11:18.

Change

No earlier filing in this sequence is available for direct comparison.
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

Official SEC source

Ownership activity is grounded in SEC Form 3 disclosures.

View source filing

Reporting Owners (1)

CIK 0002147042 Primary reporting owner

Tucker Nathan Joseph

Relationship: SVP & Chief Financial Officer
Address: 275 TECHNOLOGY DRIVE, SUITE 101, CANONSBURG
Signature: /s/ Rosemary L. Klein, Attorney-in-Fact for Nathan J. Tucker
Signature date: 20 Aug 2026

Reported non-derivative transactions

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

CNR holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 1,590
Date: 18 Aug 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

Of the 1,590 shares reported, 690 are unvested restricted stock units that will vest in accordance with the terms of the applicable award agreement. Each restricted stock unit represents a contingent right to receive one share of the issuer's common stock.