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| Form | Report Date | Filing Date | Description |
|---|---|---|---|
| 8-K | 2026-10-07 | 2026-10-08 | 8-K |
| 8-K | 2026-09-15 | 2026-09-17 | 8-K |
| 8-K | 2026-08-11 | 2026-08-14 | 8-K |
| 10-Q | 2026-06-30 | 2026-08-10 | 10-Q |
| 8-K | 2026-08-10 | 2026-08-10 | 8-K |
| 8-K | 2026-06-25 | 2026-06-26 | 8-K |
| 8-K | 2026-06-08 | 2026-06-11 | 8-K |
| 8-K | 2026-06-04 | 2026-06-05 | 8-K |
| 8-K | 2026-05-28 | 2026-06-03 | 8-K |
| 8-K | 2026-05-30 | 2026-06-02 | 8-K |
| 8-K | 2026-05-27 | 2026-05-29 | 8-K |
| 8-K | 2026-05-01 | 2026-05-06 | 8-K |
| 10-Q | 2026-03-31 | 2026-05-06 | 10-Q |
| 8-K | 2026-05-06 | 2026-05-06 | 8-K |
| 8-K | 2026-04-09 | 2026-04-15 | 8-K |
| 8-K | 2026-03-25 | 2026-03-27 | 8-K |
| 10-K | 2025-12-31 | 2026-03-12 | 10-K |
| 8-K | 2026-03-12 | 2026-03-12 | 8-K |
| 8-K | 2026-03-05 | 2026-03-10 | 8-K |
| 8-K | 2026-03-06 | 2026-03-09 | 8-K |
| 8-K | 2026-01-13 | 2026-01-15 | FORM 8-K |
| 8-K | 2025-12-30 | 2026-01-06 | 8-K |
| 8-K | 2025-12-01 | 2025-12-04 | 8-K |
| 8-K | 2025-11-10 | 2025-11-10 | 8-K |
| 10-Q | 2025-09-30 | 2025-11-10 | 10-Q |
| 8-K | 2025-08-11 | 2025-08-11 | 8-K |
| 10-Q | 2025-06-30 | 2025-08-11 | 10-Q |
| 8-K | 2025-06-04 | 2025-06-04 | 8-K |
| 8-K | 2025-05-29 | 2025-06-02 | 8-K |
| 8-K | 2025-05-19 | 2025-05-22 | 8-K |
| 8-K | 2025-05-12 | 2025-05-12 | 8-K |
| 10-Q | 2025-03-31 | 2025-05-12 | 10-Q |
| 10-K | 2024-12-31 | 2025-03-17 | 10-K |
| 8-K | 2025-03-17 | 2025-03-17 | 8-K |
| 8-K | 2025-01-02 | 2025-01-07 | 8-K |
| 10-Q | 2024-09-30 | 2024-11-12 | 10-Q |
| 8-K | 2024-11-12 | 2024-11-12 | 8-K |
| 8-K | 2024-09-27 | 2024-10-03 | FORM 8-K |
| 10-Q | 2024-06-30 | 2024-08-07 | FORM 10-Q |
| 8-K | 2024-08-06 | 2024-08-07 | FORM 8-K |
| 8-K | 2024-06-28 | 2024-07-03 | FORM 8-K |
| 8-K | 2024-05-30 | 2024-06-03 | FORM 8-K |
| 10-Q | 2024-03-31 | 2024-05-07 | FORM 10-Q |
| 8-K | 2024-05-06 | 2024-05-07 | FORM 8-K |
| 8-K | 2024-03-28 | 2024-03-28 | FORM 8-K |
| 8-K | 2024-03-25 | 2024-03-25 | FORM 8-K |
| 10-K | 2023-12-31 | 2024-03-14 | FORM 10-K |
| 8-K | 2024-03-13 | 2024-03-14 | FORM 8-K |
| 8-K | 2024-02-23 | 2024-02-23 | FORM 8-K |
| 8-K | 2023-12-18 | 2023-12-18 | FORM 8-K |
| 8-K | 2023-11-06 | 2023-11-07 | FORM 8-K |
| 10-Q | 2023-09-30 | 2023-11-06 | FORM 10-Q |
| 8-K | 2023-09-05 | 2023-09-08 | FORM 8-K |
| 8-K | 2023-08-07 | 2023-08-08 | FORM 8-K |
| 10-Q | 2023-06-30 | 2023-08-07 | FORM 10-Q |
| 8-K | 2023-08-03 | 2023-08-03 | FORM 8-K |
| 8-K | 2023-07-19 | 2023-07-19 | FORM 8-K |
| 8-K | 2023-06-01 | 2023-06-01 | FORM 8-K |
| 8-K | 2023-05-08 | 2023-05-09 | FORM 8-K |
| 10-Q | 2023-03-31 | 2023-05-08 | FORM 10-Q |
| 8-K | 2023-03-16 | 2023-03-17 | FORM 8-K |
| 10-K | 2022-12-31 | 2023-03-16 | FORM 10-K |
| 8-K | 2022-11-14 | 2022-11-15 | FORM 8-K |
| 10-Q | 2022-09-30 | 2022-11-14 | FORM 10-Q |
| 8-K | 2022-10-21 | 2022-10-21 | FORM 8-K |
| 8-K | 2022-09-28 | 2022-10-04 | FORM 8-K |
| 8-K | 2022-09-27 | 2022-10-03 | FORM 8-K |
| 8-K | 2022-08-15 | 2022-08-16 | FORM 8-K |
| 10-Q | 2022-06-30 | 2022-08-15 | FORM 10-Q |
| 8-K | 2022-08-05 | 2022-08-11 | FORM 8-K |
| 8-K | 2022-07-29 | 2022-08-04 | FORM 8-K |
| 8-K | 2022-07-07 | 2022-07-08 | FORM 8-K |
| 8-K | 2022-06-09 | 2022-06-15 | FORM 8-K |
| 10-Q | 2022-03-31 | 2022-05-23 | FORM 10-Q |
| 8-K | 2022-05-02 | 2022-05-06 | FORM 8-K |
| 8-K | 2022-03-28 | 2022-03-29 | FORM 8-K |
| 10-K | 2021-12-31 | 2022-03-28 | FORM 10-K |
| 8-K | 2022-02-14 | 2022-02-18 | FORM 8-K |
| 8-K | 2021-11-08 | 2021-11-09 | FORM 8-K |
| 10-Q | 2021-09-30 | 2021-11-08 | FORM 10-Q |
| 8-K | 2021-08-09 | 2021-08-10 | FORM 8-K |
| 10-Q | 2021-06-30 | 2021-08-09 | FORM 10-Q |
| 8-K | 2021-07-23 | 2021-07-29 | FORM 8-K |
| 8-K | 2021-06-01 | 2021-06-03 | FORM 8-K |
| 8-K | 2021-05-04 | 2021-05-04 | FORM 8-K |
| 10-Q | 2021-03-31 | 2021-05-03 | FORM 10-Q |
| 10-K | 2020-12-31 | 2021-03-09 | FORM 10-K |
| 8-K | 2021-03-09 | 2021-03-09 | FORM 8-K |
| 8-K | 2020-12-17 | 2020-12-22 | FORM 8-K |
| 8-K | 2020-11-03 | 2020-11-03 | FORM 8-K |
| 10-Q | 2020-09-30 | 2020-11-02 | FORM 10-Q |
| 8-K | 2020-10-09 | 2020-10-14 | FORM 8-K |
| 8-K | 2020-08-03 | 2020-08-03 | FORM 8-K |
| 10-Q | 2020-06-30 | 2020-08-03 | FORM 10-Q |
| 8-K | 2020-05-11 | 2020-05-11 | 8-K |
| 10-Q | 2020-03-31 | 2020-05-11 | 10-Q |
| 8-K | 2020-04-30 | 2020-05-06 | 8-K |
| 8-K | 2020-04-29 | 2020-04-29 | 8-K - ITEM 8.01 |
| 8-K | 2020-04-15 | 2020-04-16 | 8-K |
| 8-K | 2020-03-09 | 2020-03-10 | 8-K |
| 10-K | 2019-12-31 | 2020-03-09 | 10-K |
| 8-K | 2020-01-20 | 2020-01-21 | 8-K |
| 8-K | 2019-11-04 | 2019-11-05 | 8-K |
| 10-Q | 2019-09-30 | 2019-11-04 | 10-Q |
| 8-K | 2019-10-02 | 2019-10-03 | 8-K |
| 8-K | 2019-08-12 | 2019-08-13 | 8-K |
| 8-K | 2019-08-05 | 2019-08-08 | 8-K |
| 10-Q | 2019-06-30 | 2019-08-05 | 10-Q |
| 8-K | 2019-05-29 | 2019-05-29 | 8-K |
| 8-K | 2019-05-14 | 2019-05-15 | HNRG-8K-YTKVIII |
| 8-K | 2019-05-06 | 2019-05-08 | 8-K |
| 10-Q | 2019-03-31 | 2019-05-06 | FORM 10-Q |
| 8-K | 2019-03-13 | 2019-03-19 | 8-K |
| 8-K | 2019-03-11 | 2019-03-13 | 8-K |
| 10-K | 2018-12-31 | 2019-03-11 | FORM 10-K |
| 8-K | 2018-11-12 | 2018-11-13 | 8-K |
| 8-K | 2018-11-05 | 2018-11-07 | 8-K |
| 10-Q | 2018-09-30 | 2018-11-05 | 10-Q |
| 8-K | 2018-10-01 | 2018-10-04 | 8-K |
| 8-K | 2018-09-14 | 2018-10-03 | FORM 8-K |
| 8-K | 2018-08-15 | 2018-08-16 | YORKTOWN VII LP DISTRIBUTION |
| 8-K | 2018-08-06 | 2018-08-07 | 8-K |
| 10-Q | 2018-06-30 | 2018-08-06 | 10-Q |
| 8-K | 2018-05-23 | 2018-05-24 | 8-K - ANNUAL MEETING VOTING RESULTS |
| 8-K | 2018-05-21 | 2018-05-22 | FORM 8-K - PNC LOAN |
| 8-K | 2018-05-14 | 2018-05-15 | 8-K |
| 10-Q | 2018-03-31 | 2018-05-07 | FORM 10-Q |
| 8-K | 2018-03-09 | 2018-03-15 | 8-K |
| 10-K | 2017-12-31 | 2018-03-13 | FORM 10-K |
| 8-K | 2018-01-05 | 2018-01-05 | 8-K |
| 10-Q | 2017-09-30 | 2017-11-07 | 10-Q |
| 10-Q | 2017-06-30 | 2017-08-08 | FORM 10-Q |
| 8-K | 2017-06-06 | 2017-06-09 | 8-K |
| 8-K | 2017-05-25 | 2017-05-31 | 8-K |
| 8-K | 2017-05-16 | 2017-05-17 | 8-K - ITEM 5.02 |
| 10-Q | 2017-03-31 | 2017-05-08 | 10-Q |
| 10-K | 2016-12-31 | 2017-03-10 | 10-K |
| 8-K | 2016-11-14 | 2016-11-15 | 8-K |
| 10-Q | 2016-09-30 | 2016-11-04 | 10-Q |
| 8-K | 2016-08-17 | 2016-08-18 | 8-K |
| 10-Q | 2016-06-30 | 2016-08-05 | 10-Q |
| 8-K | 2016-05-11 | 2016-05-12 | 8-K |
| 8-K | 2016-05-09 | 2016-05-09 | 8-K |
| 10-Q | 2016-03-31 | 2016-05-06 | 10-Q |
| 8-K | 2016-03-31 | 2016-04-01 | 8-K |
| 8-K | 2016-03-14 | 2016-03-18 | 8-K |
| 8-K | 2016-03-11 | 2016-03-11 | 8-K |
| 10-K | 2015-12-31 | 2016-03-11 | FORM 10-K |
| 8-K | 2015-11-16 | 2015-11-19 | 8-K ANNOUNCING REVISED CONTRACTED COAL SALES POSITION |
| 10-Q | 2015-09-30 | 2015-11-06 | FORM 10-Q |
| 8-K | 2015-08-19 | 2015-08-20 | 8-K |
| 10-Q | 2015-06-30 | 2015-08-07 | FORM 10-Q |
| 8-K | 2015-07-27 | 2015-07-27 | 8-K |
| 8-K | 2015-05-28 | 2015-05-28 | 8-K |
| 10-Q | 2015-03-31 | 2015-05-08 | FORM 10-Q |
| 8-K | 2015-03-17 | 2015-03-18 | FORM 8-K |
| 10-K | 2014-12-31 | 2015-03-06 | FORM 10-K |
| 8-K | 2015-02-12 | 2015-02-20 | FORM 8-K -MSHA |
| 10-Q | 2014-09-30 | 2014-11-10 | FORM 10-Q |
| 8-K | 2014-08-29 | 2014-09-03 | FORM 8-K - SUNRISE CLOSES ACQUISITION OF VECTREN FUELS |
| 8-K | 2014-08-15 | 2014-08-18 | FORM 8-K -IPL HARDING STREET PLANT |
| 10-Q | 2014-06-30 | 2014-08-01 | FORM 10-Q |
| 8-K | 2014-07-01 | 2014-07-08 | FORM 8-K - SUNRISE STOCK PURCHASE OF VECTREN FUELS |
| 10-Q | 2014-03-31 | 2014-05-02 | FORM 10-Q |
| 10-K | 2013-12-31 | 2014-03-07 | DECEMBER 31, 2013 FORM 10K |
| 8-K | 2014-02-28 | 2014-02-28 | FINANCIAL RESULTS DECEMBER 31, 2013 |
| 8-K | 2014-02-01 | 2014-02-06 | SAVOY MARKET TRENTON BLACK |
| 10-Q | 2013-09-30 | 2013-11-06 | 3RD QTR 2013 FORM 10-Q |
| 8-K | 2013-11-01 | 2013-11-01 | FINANCIAL RESULTS FOR SEPTEMBER 30, 2013 |
| 8-K | 2013-10-15 | 2013-10-16 | ITEM 8:01 - DIVIDEND PAYABLE NOVEMBER 15, 2013 |
| 8-K | 2013-08-13 | 2013-08-14 | YORKTOWN - 8TH DISTRIBUTION |
| 10-Q | 2013-06-30 | 2013-08-06 | JUNE 30, 2013 FORM 10-Q |
| 8-K | 2013-08-02 | 2013-08-02 | JUNE 30, 2013 RESULTS |
| 8-K | 2013-07-15 | 2013-07-15 | ITEM 8:01 - DIVIDEND PAYABLE AUGUST 15, 2013 |
| 8-K | 2013-05-24 | 2013-05-24 | COAL SALES 8-K |
| 10-Q | 2013-03-31 | 2013-05-15 | MARCH 31, 2013 FORM 10-Q |
| 8-K | 2013-04-05 | 2013-04-05 | ITEM 8:01 - DIVIDEND PAYABLE MAY 15, 2013 |
| 10-K | 2012-12-31 | 2013-03-07 | DECEMBER 31, 2012 FORM 10-K |
| 8-K | 2013-03-05 | 2013-03-06 | YORKTOWN - 7TH DISTRIBUTION |
| 8-K | 2013-03-01 | 2013-03-01 | FINANCIAL RESULTS 12/31 |
| 8-K | 2012-11-29 | 2012-12-04 | ITEM 8:01 - DIVIDEND PAYABLE DECEMBER 28, 2012 |
| 8-K | 2012-11-19 | 2012-11-20 | YORKTOWN VI STOCK DISTRIBUTION |
| 10-Q | 2012-09-30 | 2012-11-09 | SEPTEMBER 30, 2012 FORM 10-Q |
| 8-K | 2012-10-31 | 2012-11-05 | FORM 8-K - OCTOBER 31, 2012 |
| 8-K | 2012-11-01 | 2012-11-02 | ITEM 2.02 - 3RD QTR 2012 FINANCIAL RESULTS |
| 8-K | 2012-10-18 | 2012-10-18 | - |
| 8-K | 2012-08-21 | 2012-08-22 | YORKTOWN VI STOCK DISTRIBUTION |
| 10-Q | 2012-06-30 | 2012-08-03 | JUNE 30, 2012 FORM 10-Q |
| 8-K | 2012-07-31 | 2012-08-01 | ITEM 2.02 SECOND QUARTER FINANCIAL RESULTS |
| 8-K | 2012-07-31 | 2012-07-31 | AUGUST 2012 DIVIDEND |
| 10-Q | 2012-03-31 | 2012-05-07 | MARCH 31, 2012 FORM 10-Q |
| 8-K | 2012-03-27 | 2012-03-28 | FORM 8-K - BB&T CONFERENCE 03292012 |
| 8-K | 2012-03-06 | 2012-03-07 | YORKTOWN VI STOCK DISTRIBUTION |
| 10-K | 2011-12-31 | 2012-03-02 | FORM 10-K |
| 8-K | 2012-01-25 | 2012-01-26 | CARLISLE/ALLERTON RESERVES |
| 8-K | 2011-11-15 | 2011-11-16 | YORKTOWN VI STOCK DISTRIBUTION |
| 10-Q | 2011-09-30 | 2011-11-07 | SEPTEMBER 30, 2011 FORM 10-Q |
| 8-K | 2011-08-09 | 2011-08-10 | FORM 8-K DATED AUGUST 10, 2011 |
| 10-Q | 2011-06-30 | 2011-08-05 | JUNE 30, 2011 FORM 10-Q |
| 8-K | 2011-06-09 | 2011-06-13 | FORM 8-K REPORT PERIOD JUNE 10 2011 |
| 8-K | 2011-05-25 | 2011-05-27 | 2011 ANNUAL MEETING AND DIVIDEND |
| 8-K | 2011-05-11 | 2011-05-12 | FORM 8-K REPORT PERIOD MAY 11, 2011 |
| 10-Q | 2011-03-31 | 2011-05-06 | MARCH 31, 2011 FORM 10-Q |
| 10-K | 2010-12-31 | 2011-03-04 | FORM 10-K |
| 8-K | 2011-01-04 | 2011-01-06 | FORM 8-K DATED JANUARY 6, 2011 |
| 8-K | 2010-11-14 | 2010-11-18 | FORM 8-K |
| 10-Q | 2010-09-30 | 2010-11-12 | SEPTEMBER 30, 2010 FORM 10-Q |
| 8-K | 2010-08-23 | 2010-08-25 | FORM 8-K |
| 10-Q | 2010-06-30 | 2010-08-06 | FORM 10-Q |
| 8-K | 2010-05-27 | 2010-06-02 | FORM 8-K DATED JUNE 1, 2010 |
| 8-K | 2010-05-19 | 2010-05-21 | FORM 8-K DATED MAY 20, 2010 |
| 10-Q | 2010-03-31 | 2010-04-30 | - |
| 10-K | 2009-12-31 | 2010-03-05 | FORM 10-K |
| 8-K | 2010-01-22 | 2010-01-25 | 8K - APPLICATION TO NASDAQ |
| 8-K | 2009-12-24 | 2009-12-31 | NAME CHANGE 8-K |
| 8-K | 2009-12-16 | 2009-12-21 | FORM 8-K DATED DECEMBER 21, 2009 |
| 10-Q | 2009-09-30 | 2009-11-10 | SEPTEMBER 30, 2009 FORM 10-Q |
| 8-K | 2009-09-25 | 2009-10-06 | FORM 8-K VAN HEUVELEN COMPENSATION |
| 8-K | 2009-09-18 | 2009-09-18 | FORM 8-K DATED SEPTEMBER 18, 2009 |
| 10-Q | 2009-06-30 | 2009-08-06 | JUNE 30, 2009 FORM 10Q |
| 10-Q | 2009-03-31 | 2009-05-08 | MARCH 31, 2009 FORM 10Q |
| 10-K | 2008-12-31 | 2009-03-26 | DECEMBER 2008 FORM 10-K |
| 8-K | 2008-12-12 | 2008-12-17 | 8K FOR $70 MILLION PNC LOAN ON 121208 |
| 10-Q | 2008-09-30 | 2008-11-13 | SEPTEMBER 30, 2008 FORM 10-Q |
| 10-Q | 2008-06-30 | 2008-08-14 | JUNE 30 2008 FORM 10Q |
| 8-K | 2008-07-21 | 2008-07-25 | FORM 8-K NEW DIRECTOR AND RSU |
| 10-Q | 2008-03-31 | 2008-05-15 | MARCH 31, 2008 FORM 10-Q |
| 8-K | 2007-10-05 | 2007-10-09 | STOCK SUBSCRIPTION/SAVOY INTEREST |
| 8-K | 2007-06-28 | 2007-07-02 | FORM 8-K FOR JUNE 28, 2007 EVENTS |
| 8-K | 2006-07-31 | 2006-08-02 | PSA SUNRISE |
| 8-K | 2006-06-05 | 2006-06-05 | FORM 8-K |
| 8-K | 2006-05-11 | 2006-05-11 | FORM 8-K SALE TO APPROACH |
| 8-K | 2006-04-19 | 2006-04-25 | FORM 8-K 4-19-06 |
| 8-K | 2006-02-22 | 2006-02-27 | FORM 8-K $7 MILLION STOCK SALE TO YORKTOWN ET AL |
| 8-K | 2006-01-05 | 2006-01-06 | FORM 8-K 010506 - LETTER OF INTENT HALLADOR/SUNRISE MERGER |
| 8-K | 2005-12-31 | 2006-01-03 | FORM 8-K PURCHSE OF SAVOY INTEREST 123105 |
| 8-K | 2005-12-20 | 2005-12-27 | FORM 8-K YORKTOWN SUBSCRIPTION AGREEMENT - 122005 |
| 10-K | 2004-12-31 | 2005-04-15 | DECEMBER 31, 2004 |
| 8-K | 2004-09-30 | 2004-10-06 | FORM 8K SCU SALE TO E&B ON SEPTEMBER 30, 2004 |
| 8-K | 2004-08-10 | 2004-08-11 | FORM 8K FOR 081004 E&B |
| 8-K | 2003-06-24 | 2003-06-30 | FORM 8-K REPORTING CHANGE IN AUDITORS |
| 8-K | 2002-07-24 | 2002-07-31 | FORM 8-K CHANGE IN AUDITORS |
| 8-K | 1997-07-21 | 1997-07-23 | FORM 8-K FOR YORKTOWN ENERGY INVESTMENT |
| 10-Q | 1995-03-31 | 1995-05-12 | FORM 10-QSB FIRST QUARTER |