🕵️ CORE Natural Resources, Inc. ($CNR)
SEC insider & ownership activity, last 12 months · CIK 1710366 · every row links its SEC filing
Over the last 12 months insiders sold $7.8M with no open-market buying against it. James A. Brock sold $4.1M in discretionary trades (Mar). State Street Corporation added 5.4% → 6.7%. No red-flag 8-Ks in the window.
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Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
0 buyers, $0 (0 lots) · 5 sellers, $7.8M (11 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| James A. Brock | 0 | – | 1 | $4.1M | Mar 18, 2026 |
| The Rosemary L. Klein REV Trust | 0 | – | 2 | $1.6M | Mar 19, 2026 |
| Richard A. Navarre | 0 | – | 2 | $961K | Mar 10, 2026 |
| Rothka John | 0 | – | 5 | $866K | Mar 17, 2026 |
| Patrick A. Kriegshauser | 0 | – | 1 | $235K | Sep 17, 2025 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| FMR LLC | 8.0% | 13G | May 6, 2026 | filing ↗ | |
| Abigail P. Johnson | 8.0% | 13G | May 6, 2026 | filing ↗ | |
| State Street Corporation | 7.8% | 13G | May 12, 2026 | filing ↗ | |
| State Street Corporation | 6.7% | 13G | Nov 10, 2025 | filing ↗ | |
| Vanguard Portfolio Management | 5.9% | 13G | Apr 29, 2026 | filing ↗ | |
| SSGA Funds Management, Inc. | 5.8% | 13G | May 12, 2026 | filing ↗ | |
| Vanguard Capital Management | 5.1% | 13G | Apr 29, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| The Rosemary L. Klein REV Trust | $1.6M | Mar 19, 2026 | filing ↗ |
| James A. Brock | $4.1M | Mar 18, 2026 | filing ↗ |
| Rothka John | $98K | Mar 17, 2026 | filing ↗ |
| Rothka John | $349K | Mar 10, 2026 | filing ↗ |
| Richard A Navarre | $550K | Mar 10, 2026 | filing ↗ |
| Paul A. Lang | $5.4M | Dec 18, 2025 | filing ↗ |
| John Rothka | $98K | Oct 9, 2025 | filing ↗ |
| John Rothka | $93K | Oct 8, 2025 | filing ↗ |
| John Rothka | $214K | Oct 3, 2025 | filing ↗ |
| Richard Navarre | $411K | Sep 25, 2025 | filing ↗ |
| Patrick A. Kriegshauser | $235K | Sep 17, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Reg FD disclosure (7.01) | Jun 4, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 4, 2026 | filing ↗ |
| Mine Safety - Reporting of Shutdowns and Patterns of Violations (1.04) | May 13, 2026 | filing ↗ |
| Earnings (2.02) | May 7, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | May 7, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 7, 2026 | filing ↗ |
| Shareholder vote (5.07) | Apr 30, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Apr 30, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 30, 2026 | filing ↗ |
| Mine Safety - Reporting of Shutdowns and Patterns of Violations (1.04) | Apr 29, 2026 | filing ↗ |
| Earnings (2.02) | Feb 12, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Feb 12, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 12, 2026 | filing ↗ |
| Mine Safety - Reporting of Shutdowns and Patterns of Violations (1.04) | Jan 8, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Dec 18, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 18, 2025 | filing ↗ |
| Earnings (2.02) | Nov 6, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Nov 6, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 6, 2025 | filing ↗ |
| Officer/director changes (5.02) | Oct 6, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Oct 6, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 6, 2025 | filing ↗ |
| Earnings (2.02) | Aug 5, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Aug 5, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 5, 2025 | filing ↗ |
| Material agreement (1.01) | Jul 28, 2025 | filing ↗ |
| Agreement terminated (1.02) | Jul 28, 2025 | filing ↗ |
| New financial obligation (2.03) | Jul 28, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 28, 2025 | filing ↗ |