Hallador Energy Co SEC filings HNRG
Hallador Energy Co has 881 filings in SEC EDGAR's recent list, going back to May 12, 1995. Its latest annual report, Form 10-K, was filed on Mar 12, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 10, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Oct 8, 2026 (material agreement, new debt, regulation fd disclosure). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 8-K |
Current report
Material agreement, New debt, Regulation FD disclosure
|
Oct 8, 2026 | Oct 7, 2026 |
| 8-K |
Current report
Material agreement, New debt, Regulation FD disclosure
|
Sep 17, 2026 | Sep 15, 2026 |
| 8-K |
Current report
Material agreement, New debt
|
Aug 14, 2026 | Aug 11, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 11, 2026 | — |
| 10-Q | Quarterly report | Aug 10, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Results of operations
|
Aug 10, 2026 | Aug 10, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Jul 28, 2026 | — |
| 4 | Insider transaction | Jul 15, 2026 | Jul 14, 2026 |
| 4 | Insider transaction | Jul 10, 2026 | Jul 9, 2026 |
| 4 | Insider transaction | Jun 30, 2026 | Jun 29, 2026 |
| 8-K |
Current report
Material agreement, New debt
|
Jun 26, 2026 | Jun 25, 2026 |
| 4 | Insider transaction | Jun 25, 2026 | Jun 23, 2026 |
| 4 | Insider transaction | Jun 25, 2026 | Jun 24, 2026 |
| 3 | Initial insider ownership | Jun 17, 2026 | Jun 8, 2026 |
| 4 | Insider transaction | Jun 17, 2026 | Jun 16, 2026 |
| 8-K |
Current report
Officer or director change
|
Jun 11, 2026 | Jun 8, 2026 |
| 8-K |
Current report
Regulation FD disclosure
|
Jun 5, 2026 | Jun 4, 2026 |
| 8-K | Current report | Jun 3, 2026 | May 28, 2026 |
| 8-K |
Current report
Material agreement, Regulation FD disclosure
|
Jun 2, 2026 | May 30, 2026 |
| 4 | Insider transaction | Jun 1, 2026 | May 28, 2026 |
| 4 | Insider transaction | Jun 1, 2026 | May 28, 2026 |
| 4 | Insider transaction | Jun 1, 2026 | May 28, 2026 |
| 4 | Insider transaction | Jun 1, 2026 | May 28, 2026 |
| 4 | Insider transaction | Jun 1, 2026 | May 28, 2026 |
| 8-K |
Current report
Shareholder vote results
|
May 29, 2026 | May 27, 2026 |
| 10-Q | Quarterly report | May 6, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Officer or director change, Other events
|
May 6, 2026 | May 1, 2026 |
| 8-K |
Current report
Results of operations
|
May 6, 2026 | May 6, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Apr 27, 2026 | — |
| 4 | Insider transaction | Apr 16, 2026 | Apr 15, 2026 |
| 4 | Insider transaction | Apr 16, 2026 | Apr 15, 2026 |
| 4 | Insider transaction | Apr 16, 2026 | Apr 15, 2026 |
| DEFA14A | Additional proxy material | Apr 15, 2026 | — |
| DEF 14A | Proxy statement | Apr 15, 2026 | May 27, 2026 |
| 8-K |
Current report
Officer or director change
|
Apr 15, 2026 | Apr 9, 2026 |
| 4 | Insider transaction | Apr 2, 2026 | Mar 31, 2026 |
| 4 | Insider transaction | Apr 2, 2026 | Mar 31, 2026 |
| 8-K | Current report | Mar 27, 2026 | Mar 25, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 26, 2026 | — |
| 3 | Initial insider ownership | Mar 25, 2026 | Mar 6, 2026 |
| 8-K |
Current report
Results of operations
|
Mar 12, 2026 | Mar 12, 2026 |
| 10-K | Annual report | Mar 12, 2026 | Dec 31, 2025 |
| 4 | Insider transaction | Mar 11, 2026 | Mar 10, 2026 |
| 8-K |
Current report
Material agreement, Agreement ended, New debt
|
Mar 10, 2026 | Mar 5, 2026 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Mar 9, 2026 | Mar 6, 2026 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Feb 27, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Jan 21, 2026 | — |
| 3 | Initial insider ownership | Jan 20, 2026 | Jan 1, 2026 |
| 4 | Insider transaction | Jan 16, 2026 | Jan 14, 2026 |
| 4 | Insider transaction | Jan 16, 2026 | Jan 14, 2026 |
| 8-K |
Current report
Agreement ended, Other events
|
Jan 15, 2026 | Jan 13, 2026 |
| 424B5 | Prospectus supplement | Jan 14, 2026 | — |
| 424B5 | Prospectus supplement | Jan 13, 2026 | — |
| S-3ASR | Automatic shelf registration | Jan 13, 2026 | — |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Jan 6, 2026 | Dec 30, 2025 |
| 4 | Insider transaction | Jan 2, 2026 | Dec 31, 2025 |
| 4 | Insider transaction | Jan 2, 2026 | Dec 30, 2025 |
| 4 | Insider transaction | Dec 31, 2025 | Dec 30, 2025 |
| 4 | Insider transaction | Dec 31, 2025 | Dec 30, 2025 |
| 3 | Initial insider ownership | Dec 22, 2025 | Dec 1, 2025 |
| 4 | Insider transaction | Dec 19, 2025 | Dec 17, 2025 |
| 424B5 | Prospectus supplement | Dec 16, 2025 | — |
| 8-K |
Current report
Officer or director change
|
Dec 4, 2025 | Dec 1, 2025 |
| 4 | Insider transaction | Nov 21, 2025 | Nov 21, 2025 |
| 144 | Notice of proposed sale | Nov 13, 2025 | — |
| 144 | Notice of proposed sale | Nov 12, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 12, 2025 | — |
| 10-Q | Quarterly report | Nov 10, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Results of operations
|
Nov 10, 2025 | Nov 10, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Nov 6, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Oct 17, 2025 | — |
| 4 | Insider transaction | Oct 3, 2025 | Oct 1, 2025 |
| 4 | Insider transaction | Oct 1, 2025 | Sep 29, 2025 |
| 4 | Insider transaction | Sep 30, 2025 | Sep 26, 2025 |
| 4 | Insider transaction | Sep 29, 2025 | Sep 25, 2025 |
| 4 | Insider transaction | Sep 24, 2025 | Sep 22, 2025 |
| UPLOAD | Letter from the SEC | Sep 8, 2025 | — |
| CORRESP | Letter to the SEC | Aug 28, 2025 | — |
| 4 | Insider transaction | Aug 19, 2025 | Aug 19, 2025 |
| 144 | Notice of proposed sale | Aug 18, 2025 | — |
| 144 | Notice of proposed sale | Aug 13, 2025 | — |
| CORRESP | Letter to the SEC | Aug 12, 2025 | — |
| 10-Q | Quarterly report | Aug 11, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Results of operations
|
Aug 11, 2025 | Aug 11, 2025 |
| UPLOAD | Letter from the SEC | Aug 6, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Jul 29, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Jul 17, 2025 | — |
| 3 | Initial insider ownership | Jul 14, 2025 | Jun 23, 2025 |
| S-8 | Employee stock plan registration | Jun 27, 2025 | — |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Jun 4, 2025 | Jun 4, 2025 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Jun 2, 2025 | May 29, 2025 |
| 8-K |
Current report
Other events
|
May 22, 2025 | May 19, 2025 |
| 4 | Insider transaction | May 21, 2025 | May 19, 2025 |
| 144 | Notice of proposed sale | May 16, 2025 | — |
| 144 | Notice of proposed sale | May 12, 2025 | — |
| 10-Q | Quarterly report | May 12, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Results of operations
|
May 12, 2025 | May 12, 2025 |
| DEF 14A | Proxy statement | Apr 17, 2025 | May 29, 2025 |
| 4/A | Filing | Apr 11, 2025 | Mar 31, 2025 |
| 4/A | Filing | Apr 11, 2025 | Mar 31, 2025 |
| 4 | Insider transaction | Apr 11, 2025 | Apr 10, 2025 |
| 4 | Insider transaction | Apr 9, 2025 | Apr 7, 2025 |
| 4 | Insider transaction | Apr 2, 2025 | Mar 31, 2025 |
| 4 | Insider transaction | Apr 2, 2025 | Mar 31, 2025 |
| 4 | Insider transaction | Apr 2, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Results of operations
|
Mar 17, 2025 | Mar 17, 2025 |
| 10-K | Annual report | Mar 17, 2025 | Dec 31, 2024 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 14, 2025 | — |
| 8-K |
Current report
Other events
|
Jan 7, 2025 | Jan 2, 2025 |
| 4 | Insider transaction | Dec 18, 2024 | Dec 17, 2024 |
| 4 | Insider transaction | Dec 10, 2024 | Dec 6, 2024 |
| 4 | Insider transaction | Nov 26, 2024 | Nov 22, 2024 |
| 4 | Insider transaction | Nov 22, 2024 | Nov 20, 2024 |
| 4 | Insider transaction | Nov 20, 2024 | Nov 15, 2024 |
| 144 | Notice of proposed sale | Nov 18, 2024 | — |
| 10-Q | Quarterly report | Nov 12, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Results of operations
|
Nov 12, 2024 | Nov 12, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 12, 2024 | — |
| 4 | Insider transaction | Oct 8, 2024 | Oct 4, 2024 |
| 8-K |
Current report
Material agreement, New debt
|
Oct 3, 2024 | Sep 27, 2024 |
| 4 | Insider transaction | Sep 17, 2024 | Sep 6, 2024 |
| 4 | Insider transaction | Sep 6, 2024 | Sep 6, 2024 |
| 4 | Insider transaction | Sep 6, 2024 | Sep 6, 2024 |
| 4 | Insider transaction | Sep 6, 2024 | Sep 6, 2024 |
| 4 | Insider transaction | Sep 3, 2024 | Aug 31, 2024 |
| SC 13D/A | Amended ownership over 5% (active) | Sep 3, 2024 | — |
| 4 | Insider transaction | Aug 30, 2024 | Jun 12, 2024 |
| 4 | Insider transaction | Aug 28, 2024 | Aug 26, 2024 |
| 4 | Insider transaction | Aug 26, 2024 | Aug 12, 2024 |
| 3 | Initial insider ownership | Aug 26, 2024 | May 30, 2024 |
| 4 | Insider transaction | Aug 19, 2024 | Aug 16, 2024 |
| 10-Q | Quarterly report | Aug 7, 2024 | Jun 30, 2024 |
| 8-K |
Current report
Results of operations
|
Aug 7, 2024 | Aug 6, 2024 |
| 4 | Insider transaction | Jul 23, 2024 | Jun 28, 2024 |
| SC 13D/A | Amended ownership over 5% (active) | Jul 23, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Jul 5, 2024 | — |
| 8-K |
Current report
Unregistered share sale, Other events
|
Jul 3, 2024 | Jun 28, 2024 |
| UPLOAD | Letter from the SEC | Jun 12, 2024 | — |
| CORRESP | Letter to the SEC | Jun 6, 2024 | — |
| 8-K |
Current report
Shareholder vote results
|
Jun 3, 2024 | May 30, 2024 |
| CORRESP | Letter to the SEC | May 15, 2024 | — |
| UPLOAD | Letter from the SEC | May 9, 2024 | — |
| 10-Q | Quarterly report | May 7, 2024 | Mar 31, 2024 |
| 8-K |
Current report
Results of operations
|
May 7, 2024 | May 6, 2024 |
| 4 | Insider transaction | May 2, 2024 | Apr 30, 2024 |
| DEFA14A | Additional proxy material | Apr 19, 2024 | — |
| DEF 14A | Proxy statement | Apr 19, 2024 | May 30, 2024 |
| 3 | Initial insider ownership | Apr 19, 2024 | Apr 10, 2024 |
| 4 | Insider transaction | Apr 3, 2024 | Apr 1, 2024 |
| 4 | Insider transaction | Apr 3, 2024 | Apr 1, 2024 |
| 4 | Insider transaction | Apr 3, 2024 | Apr 1, 2024 |
| SC 13D/A | Amended ownership over 5% (active) | Apr 2, 2024 | — |
| SC 13D/A | Amended ownership over 5% (active) | Apr 2, 2024 | — |
| 4 | Insider transaction | Apr 2, 2024 | Mar 29, 2024 |
| 8-K |
Current report
Other events
|
Mar 28, 2024 | Mar 28, 2024 |
| 4 | Insider transaction | Mar 25, 2024 | Mar 21, 2024 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Mar 25, 2024 | Mar 25, 2024 |
| 10-K | Annual report | Mar 14, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Results of operations
|
Mar 14, 2024 | Mar 13, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Mar 7, 2024 | — |
| SC 13D/A | Amended ownership over 5% (active) | Feb 29, 2024 | — |
| SC 13D/A | Amended ownership over 5% (active) | Feb 27, 2024 | — |
| 4 | Insider transaction | Feb 27, 2024 | Feb 23, 2024 |
| 4 | Insider transaction | Feb 26, 2024 | Feb 23, 2024 |
| 8-K |
Current report
Regulation FD disclosure
|
Feb 23, 2024 | Feb 23, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 8, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Feb 2, 2024 | — |
| 4 | Insider transaction | Dec 28, 2023 | Dec 22, 2023 |
| 8-K |
Current report
Material agreement
|
Dec 18, 2023 | Dec 18, 2023 |
| 424B5 | Prospectus supplement | Dec 18, 2023 | — |
| 4 | Insider transaction | Dec 5, 2023 | Dec 1, 2023 |
| EFFECT | Filing | Nov 29, 2023 | — |
| EFFECT | Filing | Nov 29, 2023 | — |
| CORRESP | Letter to the SEC | Nov 27, 2023 | — |
| CORRESP | Letter to the SEC | Nov 27, 2023 | — |
| S-3/A | Form s-3/a | Nov 17, 2023 | — |
| S-3/A | Form s-3/a | Nov 17, 2023 | — |
| 8-K |
Current report
Results of operations
|
Nov 7, 2023 | Nov 6, 2023 |
| 10-Q | Quarterly report | Nov 6, 2023 | Sep 30, 2023 |
| UPLOAD | Letter from the SEC | Nov 6, 2023 | — |
| 10-K/A | Amended annual report | Nov 1, 2023 | Dec 31, 2022 |
| CORRESP | Letter to the SEC | Oct 16, 2023 | — |
| CORRESP | Letter to the SEC | Sep 19, 2023 | — |
| UPLOAD | Letter from the SEC | Sep 12, 2023 | — |
| 8-K |
Current report
Officer or director change
|
Sep 8, 2023 | Sep 5, 2023 |
| CORRESP | Letter to the SEC | Sep 6, 2023 | — |
| UPLOAD | Letter from the SEC | Aug 9, 2023 | — |
| UPLOAD | Letter from the SEC | Aug 9, 2023 | — |
| 8-K |
Current report
Results of operations
|
Aug 8, 2023 | Aug 7, 2023 |
| 10-Q | Quarterly report | Aug 7, 2023 | Jun 30, 2023 |
| 8-K |
Current report
Material agreement, New debt
|
Aug 3, 2023 | Aug 3, 2023 |
| 4 | Insider transaction | Aug 2, 2023 | Jul 31, 2023 |
| UPLOAD | Letter from the SEC | Aug 1, 2023 | — |
| S-3 | Shelf registration | Jul 19, 2023 | — |
| S-3 | Shelf registration | Jul 19, 2023 | — |
| 8-K |
Current report
Other events
|
Jul 19, 2023 | Jul 19, 2023 |
| 8-K |
Current report
Shareholder vote results
|
Jun 1, 2023 | Jun 1, 2023 |
| 144 | Notice of proposed sale | May 18, 2023 | — |
| 8-K |
Current report
Results of operations
|
May 9, 2023 | May 8, 2023 |
| 10-Q | Quarterly report | May 8, 2023 | Mar 31, 2023 |
Showing 200 filings, the most recent 200. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
New to this? Read What Are SEC Filings? 10-K, 10-Q, 8-K and Other Forms Explained.
Company profile
- Industry
- Electric Services (SIC 4911)
- Listed as
- HNRG (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- CO
- Headquarters
- Terre Haute, IN
- SEC filer status
- Accelerated filer
- SEC CIK
- 788965
- Former names
- HALLADOR PETROLEUM CO (until Dec 21, 2009)
Other Electric Services companies
- Nextera Energy Inc NEE
- Southern Co SO
- Constellation Energy Corp CEG
- American Electric Power Co Inc AEP
- Dominion Energy, Inc D
- Entergy Corp /DE/ ETR
- Vistra Corp. VST
- Fortis Inc. FTS
Source: SEC EDGAR filings. This is company-reported data, not investment advice.