According to recent filings covering the 90 days ending February 10, 2026, the three most significant insider holders at Core Natural Resources are Executive Chair James A Brock (511.33K shares), Chief Executive Officer Paul A Lang (341.06K shares), Director William P Powell (130.09K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| James A Brock | Executive Chair | 511,335 | 22 May, 2025 |
| Paul A Lang | Chief Executive Officer | 341,062 | 12 May, 2025 |
| William P Powell | 130,088 | 04 May, 2023 | |
| Ed Roberson | 75,951 | 05 May, 2022 | |
| Deck Slone | Svp And Strategy & Public Policy | 66,365 | 20 Feb, 2025 |
| Rosemary L Klein | Svp And Clo & Corp. Sec. | 64,850 | 20 Feb, 2025 |
| John T Mills | 55,950 | 09 May, 2024 | |
| Miteshkumar Thakkar | President & Cfo | 54,956 | 20 Feb, 2025 |
| Joseph P Jr Platt | 39,038 | 20 Feb, 2025 | |
| Martha A Wiegand | General Counsel & Secretary | 37,906 | 09 Feb, 2024 |
| Sophie Bergeron | 30,828 | 12 May, 2022 | |
| Patrick A Kriegshauser | 23,348 | 18 Sep, 2025 | |
| Richard A Navarre | 21,830 | 26 Sep, 2025 | |
| George John Jr Schuller | Svp And Chief Operating Officer | 21,590 | 20 Feb, 2025 |
| Kurt R. Salvatori | Svp And Chief Admin. Officer | 20,913 | 20 Feb, 2025 |
| Holly K Koeppel | 13,348 | 02 Apr, 2025 | |
| Robert J. Jr. Braithwaite | Svp And Marketing & Sales | 12,624 | 20 Feb, 2025 |
| John Rothka | Chief Accounting Officer | 9,307 | 10 Oct, 2025 |
| Cassandra Chia-Wei Pan | 7,707 | 20 Feb, 2025 | |
| Valli Perera | 7,707 | 20 Feb, 2025 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 13 Nov, 2025 | James A Brock | Common stock, par value $0.01 per share | A | 140,760 | $0.00 | 140,760 | I | G |
| 13 Nov, 2025 | James A Brock | Common stock, par value $0.01 per share | D | 140,760 | $0.00 | 24,440 | I | G |
| 09 Oct, 2025 | John Rothka | Common stock, par value $0.01 per share | D | 1,000 | $100.00 | 9,307 | D | S |
| 08 Oct, 2025 | John Rothka | Common stock, par value $0.01 per share | D | 1,000 | $95.00 | 10,307 | D | S |
| 03 Oct, 2025 | John Rothka | Common stock, par value $0.01 per share | D | 2,500 | $90.00 | 11,307 | D | S |
| 25 Sep, 2025 | Richard A Navarre | Common stock, par value $0.01 per share | D | 5,000 | $82.20 | 21,830 | D | S |
| 25 Sep, 2025 | Richard A Navarre | - | - | 21,830 | D | |||
| 17 Sep, 2025 | Patrick A Kriegshauser | - | - | 23,348 | D | |||
| 17 Sep, 2025 | Patrick A Kriegshauser | Common stock, par value $0.01 per share | D | 3,043 | $77.07 | 23,348 | D | S |
| 20 May, 2025 | James A Brock | Common stock, par value $0.01 per share | D | 165,200 | $0.00 | 370,575 | D | G |
| 20 May, 2025 | James A Brock | - | - | 370,575 | D | |||
| 20 May, 2025 | James A Brock | - | - | 165,200 | I | |||
| 20 May, 2025 | James A Brock | Common stock, par value $0.01 per share | A | 165,200 | $0.00 | 165,200 | I | G |
| 09 May, 2025 | Paul A Lang | - | - | 341,062 | D | |||
| 09 May, 2025 | Paul A Lang | Common stock, par value $0.01 per share | A | 7,500 | $66.95 | 341,062 | D | P |
| 31 Mar, 2025 | Holly K Koeppel | Common stock, par value $0.01 per share | D | 4,044 | $75.68 | 13,348 | D | S |
| 31 Mar, 2025 | Holly K Koeppel | Common stock, par value $0.01 per share | D | 4,771 | $74.97 | 17,392 | D | S |
| 18 Feb, 2025 | Patrick A Kriegshauser | Common stock, par value $0.01 per share | A | 1,674 | $0.00 | 24,717 | D | A |
| 18 Feb, 2025 | Patrick A Kriegshauser | Common stock, par value $0.01 per share | A | 1,674 | $0.00 | 26,391 | D | A |
| 18 Feb, 2025 | Patrick A Kriegshauser | - | - | 26,391 | D |