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 |
|---|---|---|---|
| UPLOAD | Letter from the SEC | Sep 8, 2025 | — |
| CORRESP | Letter to the SEC | Aug 28, 2025 | — |
| CORRESP | Letter to the SEC | Aug 12, 2025 | — |
| UPLOAD | Letter from the SEC | Aug 6, 2025 | — |
| UPLOAD | Letter from the SEC | Jun 12, 2024 | — |
| CORRESP | Letter to the SEC | Jun 6, 2024 | — |
| CORRESP | Letter to the SEC | May 15, 2024 | — |
| UPLOAD | Letter from the SEC | May 9, 2024 | — |
| 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 | — |
| UPLOAD | Letter from the SEC | Nov 6, 2023 | — |
| CORRESP | Letter to the SEC | Oct 16, 2023 | — |
| CORRESP | Letter to the SEC | Sep 19, 2023 | — |
| UPLOAD | Letter from the SEC | Sep 12, 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 | — |
| UPLOAD | Letter from the SEC | Aug 1, 2023 | — |
| NT 10-Q | Form nt 10-q | May 16, 2022 | Mar 31, 2022 |
| UPLOAD | Letter from the SEC | Feb 22, 2022 | — |
| CORRESP | Letter to the SEC | Feb 8, 2022 | — |
| UPLOAD | Letter from the SEC | Dec 15, 2021 | — |
| UPLOAD | Letter from the SEC | Feb 4, 2019 | — |
| CORRESP | Letter to the SEC | Jan 18, 2019 | — |
| CORRESP | Letter to the SEC | Jan 4, 2019 | — |
| UPLOAD | Letter from the SEC | Dec 20, 2018 | — |
| UPLOAD | Letter from the SEC | Jan 27, 2016 | — |
| CORRESP | Letter to the SEC | Jan 15, 2016 | — |
| CORRESP | Letter to the SEC | Dec 7, 2015 | — |
| UPLOAD | Letter from the SEC | Dec 1, 2015 | — |
| UPLOAD | Letter from the SEC | Jun 17, 2013 | — |
| CORRESP | Letter to the SEC | Jun 5, 2013 | — |
| UPLOAD | Letter from the SEC | May 31, 2013 | — |
| CORRESP | Letter to the SEC | May 21, 2013 | — |
| CORRESP | Letter to the SEC | May 3, 2013 | — |
| UPLOAD | Letter from the SEC | Apr 25, 2013 | — |
| CERTNAS | Auto-generated paper document | May 14, 2010 | — |
| 8-A12B | Form 8a 12(b) for hallador energy company | May 12, 2010 | — |
| UPLOAD | Letter from the SEC | Dec 22, 2009 | — |
| CORRESP | Letter to the SEC | Dec 15, 2009 | — |
| UPLOAD | Letter from the SEC | Dec 4, 2009 | — |
| D | Filing | Sep 29, 2009 | — |
| 10KSB | December 31, 2007 form 10-ksb | Mar 28, 2008 | Dec 31, 2007 |
| 10QSB | September 30, 2007 form 10-qsb | Nov 14, 2007 | Sep 30, 2007 |
| UPLOAD | Letter from the SEC | Oct 11, 2007 | — |
| 10QSB/A | Amend #1 to sept 30, 2006 form 10-qsb/a | Sep 20, 2007 | Sep 30, 2006 |
| 10QSB | June 30, 2007 form 10-qsb | Aug 14, 2007 | Jun 30, 2007 |
| 10QSB | Hallador petroleum company march 31, 2007 form 10-qsb | May 15, 2007 | Mar 31, 2007 |
| CORRESP | Letter to the SEC | May 3, 2007 | — |
| 10KSB | Form 10-ksb for year ended december 31, 2006 | Apr 16, 2007 | Dec 31, 2006 |
| 10KSB/A | December 31, 2005 form 10-ksb/a amend. 1 | Apr 11, 2007 | Dec 31, 2005 |
| NT 10-K | Form 12b-25 for 12/31/2006 form 10-ksb | Apr 3, 2007 | Dec 31, 2006 |
| CORRESP | Letter to the SEC | Mar 9, 2007 | — |
| UPLOAD | Letter from the SEC | Feb 23, 2007 | — |
| CORRESP | Letter to the SEC | Jan 26, 2007 | — |
| CORRESP | Letter to the SEC | Jan 26, 2007 | — |
| UPLOAD | Letter from the SEC | Dec 22, 2006 | — |
| UPLOAD | Letter from the SEC | Dec 22, 2006 | — |
| 10QSB | September 30, 2006 form 10qsb | Nov 20, 2006 | Sep 30, 2006 |
| 10QSB | September 30, 2006 form 10qsb | Nov 20, 2006 | Sep 2, 2006 |
| NT 10-Q | Form12b-25 for september 30, 2006 | Nov 14, 2006 | Sep 30, 2006 |
| 10QSB | June 30, 2006 form 10qsb | Aug 14, 2006 | Jun 30, 2006 |
| 10QSB | 10qsb-033106 | May 22, 2006 | Mar 31, 2006 |
| NT 10-Q | Form 12b-25 | May 16, 2006 | Mar 31, 2006 |
| 10KSB | December 31, 2005 form 10-ksb for hallador petroleum company | Apr 14, 2006 | Dec 31, 2005 |
| NT 10-K | Form 12(b)25 for december 31, 2005 form 10-ksb | Mar 31, 2006 | Dec 31, 2005 |
| 10QSB | September 30, 2005 form 10-qsb for hpc | Nov 14, 2005 | Sep 30, 2005 |
| 10QSB | June 30, 2005 form 10-qsb for hpc | Aug 15, 2005 | Jun 30, 2005 |
| 10QSB | March 31, 2005 form 10-qsb | May 16, 2005 | Mar 31, 2005 |
| NT 10-K | Notification of late filing for 12/31/2004 form 10-ksb | Mar 29, 2005 | Dec 31, 2004 |
| 10QSB | September 30, 2004 form 10-qsb for hpc | Nov 22, 2004 | Sep 30, 2004 |
| NT 10-Q | Form 12b(25) notification of late filing for 093004 form 10qsb | Nov 16, 2004 | Sep 30, 2004 |
| 10QSB | Form 10qsb june 30, 2004 | Aug 16, 2004 | Aug 10, 2004 |
| 10QSB | March 31, 2004 form 10-qsb for hallador petroleum | May 17, 2004 | Mar 31, 2004 |
| 10KSB | December 31, 2003 form 10-ksb for hpc | Apr 14, 2004 | Dec 31, 2003 |
| NT 10-K | Form 12(b)-25 for 12/31/03 form 10-ksb | Mar 30, 2004 | Dec 31, 2003 |
| 10QSB | September 30, 2003 form 10-qsb | Nov 14, 2003 | Sep 30, 2003 |
| 10QSB | 2nd qtr form 10-qsb for hpc | Aug 14, 2003 | Jun 30, 2003 |
| 10QSB | March 31, 2003 form 10-qsb hpc | May 20, 2003 | Mar 31, 2003 |
| NT 10-Q | Form 12(b)25 extension for 10-qsb 033103 | May 16, 2003 | Mar 31, 2003 |
| 10KSB | 12/31/02 form 10-ksb hallador petroleum | Apr 15, 2003 | Dec 31, 2002 |
| NT 10-K | Form 12b(25) - 10ksb 12/31/02 | Mar 28, 2003 | Dec 31, 2002 |
| 10QSB | 3rd qtr hpc 10-qsb | Nov 14, 2002 | Sep 30, 2002 |
| 10QSB | June 30, 2002 form 10qsb | Aug 19, 2002 | Jun 30, 2002 |
| NT 10-Q | June 30, 2002 form 10-qsb 12(b)-25 extension | Aug 14, 2002 | Jun 30, 2002 |
| 10QSB | March 31, 2002 form 10-qsb | May 15, 2002 | Mar 31, 2002 |
| 10KSB | 12-31-01 10-ksb | Apr 1, 2002 | Dec 31, 2001 |
| 10QSB | 9/30/2001 10-qsb | Nov 14, 2001 | Sep 30, 2001 |
| 10QSB | June 30, 2001 financials | Aug 14, 2001 | Jun 30, 2001 |
| 10QSB | Hpc 1st qtr financials | May 14, 2001 | Mar 31, 2001 |
| 10KSB40 | Filing | Apr 2, 2001 | Dec 31, 2000 |
| 10QSB | Filing | Nov 14, 2000 | Sep 30, 2000 |
| 10QSB | June 30, 2000 10qsb | Aug 14, 2000 | Jun 30, 2000 |
| 10QSB | 1st qtr 2000 10qsb | May 11, 2000 | Mar 31, 2000 |
| 10-K405 | Filing | Mar 31, 2000 | Dec 31, 1999 |
| 10QSB | Third quarter 10qsb 1999 | Nov 15, 1999 | Sep 30, 1999 |
| 10QSB | Filing | Aug 16, 1999 | Jun 30, 1999 |
| 10QSB | First qtr form 10qsb | May 19, 1999 | Mar 31, 1999 |
| NT 10-Q | Filing | May 18, 1999 | Mar 31, 1999 |
| 10KSB40 | Filing | Mar 29, 1999 | Dec 31, 1998 |
| 10QSB/A | Filing | Nov 18, 1998 | Sep 30, 1998 |
| 10QSB | Third qtr form 10qsb | Nov 4, 1998 | Sep 30, 1998 |
| 10QSB | Second qtr form 10qsb | Aug 14, 1998 | Jun 30, 1998 |
| 10QSB | First quarter form 10qsb | May 15, 1998 | Mar 31, 1998 |
| 10KSB40 | Filing | Apr 15, 1998 | Dec 31, 1997 |
| NT 10-K | Filing | Mar 30, 1998 | Dec 31, 1997 |
| 10QSB | Third quarter form 10qsb | Nov 13, 1997 | Sep 30, 1997 |
| 10QSB | Second quarter form 10-qsb | Aug 15, 1997 | Jun 30, 1997 |
| 10QSB | First quarter 1997 form 10-qsb | May 15, 1997 | Mar 31, 1997 |
| 10KSB40 | Filing | Mar 28, 1997 | Dec 31, 1996 |
| 10QSB | Third quarter 10-qsb | Nov 14, 1996 | Sep 30, 1996 |
| 10QSB | Second quarter form 10-qsb | Aug 14, 1996 | Jun 30, 1996 |
| 10QSB | First quarter form 10-qsb | May 14, 1996 | Mar 31, 1996 |
| 10KSB | Filing | Apr 1, 1996 | Dec 31, 1995 |
| 10QSB | Third quarter form 10-qsb | Nov 14, 1995 | Sep 30, 1995 |
| 10QSB | Second quarter form 10-qsb | Aug 14, 1995 | Jun 30, 1995 |
Showing 118 filings. 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.
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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)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.