As of September 09, 2026, Core Natural Resources's top three insider holders are James A Brock (Executive Chair And Ceo, 391.42K shares), Paul A Lang (Chief Executive Officer, 341.06K shares), Paul A Lang (Chief Executive Officer, 341.06K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | James A Brock | Executive Chair And Ceo | 291,415 | 100,000 | 391,415 | 28.7% | 25 Mar, 2026 |
| 2 | Paul A Lang | Chief Executive Officer | 341,062 | 0 | 341,062 | 25.0% | 12 May, 2025 |
| 3 | William P Powell | Director | 130,088 | 0 | 130,088 | 9.5% | 04 May, 2023 |
| 4 | Ed Roberson | Director | 75,951 | 0 | 75,951 | 5.6% | 05 May, 2022 |
| 5 | Deck Slone | Svp, Strategy Public Policy | 70,207 | 0 | 70,207 | 5.1% | 19 Feb, 2026 |
| 6 | Miteshkumar Thakkar | President Cfo | 61,657 | 0 | 61,657 | 4.5% | 19 Feb, 2026 |
| 7 | John T Mills | Director | 55,950 | 0 | 55,950 | 4.1% | 09 May, 2024 |
| 8 | Rosemary L Klein | Svp, Clo Corp. Sec. | 53,679 | 0 | 53,679 | 3.9% | 20 Mar, 2026 |
| 9 | Martha A Wiegand | General Counsel Secretary | 37,906 | 0 | 37,906 | 2.8% | 09 Feb, 2024 |
| 10 | Sophie Bergeron | Director | 30,828 | 0 | 30,828 | 2.3% | 12 May, 2022 |
| 11 | George John Jr Schuller | Svp, Chief Operating Officer | 27,338 | 0 | 27,338 | 2.0% | 19 Feb, 2026 |
| 12 | Patrick A Kriegshauser | Director | 24,958 | 0 | 24,958 | 1.8% | 19 Feb, 2026 |
| 13 | Kurt R. Salvatori | Svp, Chief Admin. Officer | 24,585 | 0 | 24,585 | 1.8% | 19 Feb, 2026 |
| 14 | Robert J. Jr. Braithwaite | Svp, Marketing Sales | 16,290 | 0 | 16,290 | 1.2% | 19 Feb, 2026 |
| 15 | Valli Perera | Director | 9,317 | 0 | 9,317 | 0.7% | 19 Feb, 2026 |
| 16 | Cassandra Chia-Wei Pan | Director | 7,707 | 0 | 7,707 | 0.6% | 20 Feb, 2025 |
| 17 | John Rothka | Chief Accounting Officer | 5,190 | 0 | 5,190 | 0.4% | 18 Mar, 2026 |
| 18 | Ronald C Keating | Director | 1,390 | 0 | 1,390 | 0.1% | 01 May, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 30 Apr, 2026 | Edward L Ii Doheny | Director | Acquired A | 1,390 | $0.00 | $0 | 1,390 | Direct |
| 30 Apr, 2026 | Ronald C Keating | Director | Acquired A | 1,390 | $0.00 | $0 | 1,390 | Direct |
| 24 Mar, 2026 | James A Brock | Executive Chair And Ceo | Disposed G | 24,440 | $0.00 | $0 | 0 | Indirect |
| 24 Mar, 2026 | James A Brock | Executive Chair And Ceo | Acquired G | 24,440 | $0.00 | $0 | 291,415 | Direct |
| 19 Mar, 2026 | Rosemary L Klein | Svp, Clo Corp. Sec. | Disposed S | 10,000 | $105.00 | $1.05Mn | 58,679 | Direct |
| 19 Mar, 2026 | Rosemary L Klein | Svp, Clo Corp. Sec. | Disposed S | 5,000 | $110.62 | $553.10K | 53,679 | Direct |
| 18 Mar, 2026 | James A Brock | Executive Chair And Ceo | Disposed S | 40,760 | $101.15 | $4.12Mn | 100,000 | Indirect |
| 17 Mar, 2026 | John Rothka | Chief Accounting Officer | Disposed S | 1,000 | $97.66 | $97.66K | 5,190 | Direct |
| 17 Mar, 2026 | John Rothka | Chief Accounting Officer | Disposed S | 1,000 | $97.66 | $97.66K | 5,190 | Direct |
| 17 Mar, 2026 | John Rothka | Chief Accounting Officer | Disposed S | 1,000 | $97.66 | $97.66K | 5,190 | Direct |
| 17 Mar, 2026 | John Rothka | Chief Accounting Officer | Disposed S | 1,000 | $97.66 | $97.66K | 5,190 | Direct |
| 10 Mar, 2026 | Richard A Navarre | Director | Disposed S | 6,000 | $91.70 | $550.20K | 18,034 | Direct |
| 10 Mar, 2026 | John Rothka | Chief Accounting Officer | Disposed S | 3,800 | $91.62 | $348.16K | 6,190 | Direct |
| 10 Mar, 2026 | John Rothka | Chief Accounting Officer | Disposed S | 3,800 | $91.62 | $348.16K | 6,190 | Direct |
| 10 Mar, 2026 | John Rothka | Chief Accounting Officer | Disposed S | 3,800 | $91.62 | $348.16K | 6,190 | Direct |
| 10 Mar, 2026 | John Rothka | Chief Accounting Officer | Disposed S | 3,800 | $91.62 | $348.16K | 6,190 | Direct |
| 18 Feb, 2026 | John Rothka | Chief Accounting Officer | Disposed F | 79 | $88.96 | $7.03K | 9,990 | Direct |
| 18 Feb, 2026 | John Rothka | Chief Accounting Officer | Disposed F | 79 | $88.96 | $7.03K | 9,990 | Direct |
| 18 Feb, 2026 | John Rothka | Chief Accounting Officer | Disposed F | 79 | $88.96 | $7.03K | 9,990 | Direct |
| 18 Feb, 2026 | John Rothka | Chief Accounting Officer | Disposed F | 79 | $88.96 | $7.03K | 9,990 | Direct |