Core Natural Resources appoints board chair Jimmy Brock as CEO; Paul Lang departs

Core Natural Resources, Inc.

James A. Brock appointed CEO effective October 6, 2025, succeeding Paul A. Lang.
Paul A. Lang separated as CEO and resigned from board; will provide transition consulting through Dec 31, 2025.
Lang to receive lump sum cash of $7,950,553 plus benefits and RSU settlements per separation agreement.
Brock previously executive chair since Jan 2025; prior CEO of CONSOL Energy before merger with Arch Resources.

item 5.02 item 7.01 item 9.01

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