| Date | Event | What happened / filer | Source |
|---|---|---|---|
| 2026-07-28 | 13G | Schedule 13G filed — ≥5% beneficial owner (passive) · by BlackRock, Inc. | sec.gov ↗ |
| 2026-06-26 | 8-K 2.03 | Creation of a direct financial obligation | sec.gov ↗ |
| 2026-06-26 | 8-K 1.01 | Entry into a material definitive agreement | sec.gov ↗ |
| 2026-06-11 | 8-K 5.02 | Departure/election of directors or officers; compensation | sec.gov ↗ |
| 2026-06-05 | 8-K 7.01 | Regulation FD disclosure | sec.gov ↗ |
| 2026-06-03 | 8-K 1.04 | Mine safety — reporting of shutdowns | sec.gov ↗ |
| 2026-06-02 | 8-K 7.01 | Regulation FD disclosure | sec.gov ↗ |
| 2026-06-02 | 8-K 1.01 | Entry into a material definitive agreement | sec.gov ↗ |
| 2026-05-29 | 8-K 5.07 | Submission of matters to a vote of security holders | sec.gov ↗ |
| 2026-05-06 | 8-K 8.01 | Other events | sec.gov ↗ |
| 2026-05-06 | 8-K 5.02 | Departure/election of directors or officers; compensation | sec.gov ↗ |
| 2026-05-06 | 8-K 2.02 | Results of operations and financial condition (earnings)earnings history (EARN) → | sec.gov ↗ |
| 2026-04-27 | 13G/A | Schedule 13G amendment — ≥5% beneficial owner (passive) · by BlackRock, Inc. | sec.gov ↗ |
| 2026-04-15 | 8-K 5.02 | Departure/election of directors or officers; compensation | sec.gov ↗ |
| 2026-03-27 | 8-K 1.04 | Mine safety — reporting of shutdowns | sec.gov ↗ |
| 2026-03-26 | 13G/A | Schedule 13G amendment — ≥5% beneficial owner (passive) · by VANGUARD GROUP INC | sec.gov ↗ |
| 2026-03-12 | 8-K 2.02 | Results of operations and financial condition (earnings)earnings history (EARN) → | sec.gov ↗ |
| 2026-03-10 | 8-K 2.03 | Creation of a direct financial obligation | sec.gov ↗ |
| 2026-03-10 | 8-K 1.02 | Termination of a material definitive agreement | sec.gov ↗ |
| 2026-03-10 | 8-K 1.01 | Entry into a material definitive agreement | sec.gov ↗ |
| 2026-03-09 | 8-K 7.01 | Regulation FD disclosure | sec.gov ↗ |
| 2026-03-09 | 8-K 5.02 | Departure/election of directors or officers; compensation | sec.gov ↗ |
| 2026-02-28 | 13D/A | Schedule 13D amendment — ≥5% beneficial owner (active intent) · by Hallador Alternative Assets Fund, LLC | sec.gov ↗ |
| 2026-01-21 | 13G | Schedule 13G filed — ≥5% beneficial owner (passive) · by BlackRock, Inc. | sec.gov ↗ |
| 2026-01-15 | 8-K 8.01 | Other events | sec.gov ↗ |
| 2026-01-15 | 8-K 1.02 | Termination of a material definitive agreement | sec.gov ↗ |
| 2026-01-06 | 8-K 7.01 | Regulation FD disclosure | sec.gov ↗ |
| 2026-01-06 | 8-K 5.02 | Departure/election of directors or officers; compensation | sec.gov ↗ |
| 2025-12-04 | 8-K 5.02 | Departure/election of directors or officers; compensation | sec.gov ↗ |
| 2025-11-12 | 13G/A | Schedule 13G amendment — ≥5% beneficial owner (passive) · by AEGIS FINANCIAL CORP | sec.gov ↗ |
| 2025-11-10 | 8-K 2.02 | Results of operations and financial condition (earnings)earnings history (EARN) → | sec.gov ↗ |
| 2025-11-06 | 13G | Schedule 13G filed — ≥5% beneficial owner (passive) · by Becker Mark D. | sec.gov ↗ |
| 2025-10-17 | 13G/A | Schedule 13G amendment — ≥5% beneficial owner (passive) · by BlackRock, Inc. | sec.gov ↗ |
| 2025-08-11 | 8-K 2.02 | Results of operations and financial condition (earnings)earnings history (EARN) → | sec.gov ↗ |
8-K item codes from the filing header; 13D/G subject and filer verified against the filing index page.
