HALLADOR ENERGY CO — SC 13D/A Filings
36 SC 13D/A filings on record
This page lists all SC 13D/A filings submitted to the SEC by HALLADOR ENERGY CO (HNRG), sorted by most recent first. Each row links to the full filing on EdgarLookup. HALLADOR ENERGY CO has filed 36 SC 13D/A documents with the SEC since 1995. To view all SEC filings by HALLADOR ENERGY CO, see the full filings list.
All
10-K
10-K/A
10-K405
10-Q
10-Q/A
10KSB
10KSB/A
10KSB40
10QSB
10QSB/A
144
3
3/A
4
4/A
424B5
5
8-A12B
8-K
8-K/A
CERTNAS
CORRESP
D
DEF 14A
DEF 14C
DEFA14A
EFFECT
NT 10-K
NT 10-Q
PRE 14A
S-3
S-3/A
S-3ASR
S-8
SC 13D
SC 13D/A
SC 13G
SC 13G/A
SCHEDULE 13D/A
SCHEDULE 13G
SCHEDULE 13G/A
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| SC 13D/A | SCHEDULE 13D/A | 0001437749-24-028278 | Sep 3, 2024 | — |
| SC 13D/A | SC 13D/A | 0001104659-24-082010 | Jul 23, 2024 | — |
| SC 13D/A | SCHEDULE 13D/A | 0001437749-24-010728 | Apr 2, 2024 | — |
| SC 13D/A | SCHEDULE 13D/A | 0001437749-24-010677 | Apr 2, 2024 | — |
| SC 13D/A | SC 13D/A | 0001104659-24-029478 | Feb 29, 2024 | — |
| SC 13D/A | SCHEDULE 13D/A | 0001437749-24-005660 | Feb 27, 2024 | — |
| SC 13D/A | SC 13D/A | 0001104659-23-047896 | Apr 20, 2023 | — |
| SC 13D/A | SC 13D/A | 0001104659-22-080968 | Jul 20, 2022 | — |
| SC 13D/A | SCHEDULE 13D/A | 0001437749-22-015629 | Jun 22, 2022 | — |
| SC 13D/A | SC 13D/A | 0001104659-19-065559 | Nov 20, 2019 | — |
| SC 13D/A | SC 13D/A | 0001193125-19-080916 | Mar 20, 2019 | — |
| SC 13D/A | SC 13D/A | 0001193125-18-342342 | Dec 4, 2018 | — |
| SC 13D/A | SCHEDULE 13D (AMENDMENT NO. 6) | 0001193125-18-166548 | May 17, 2018 | — |
| SC 13D/A | SCHEDULE 13D (AMENDMENT NO. 5) | 0001193125-16-769754 | Nov 16, 2016 | — |
| SC 13D/A | SCHEDULE 13D (AMENDMENT NO. 4) | 0001193125-16-686593 | Aug 19, 2016 | — |
| SC 13D/A | SC 13D/A | 0001144204-16-103587 | May 19, 2016 | — |
| SC 13D/A | SC 13D/A | 0001193125-16-590421 | May 13, 2016 | — |
| SC 13D/A | SC 13D/A | 0001193125-15-300430 | Aug 24, 2015 | — |
| SC 13D/A | SC 13D/A | 0001193125-15-205554 | May 29, 2015 | — |
| SC 13D/A | SC 13D/A | 0001144204-14-024346 | Apr 23, 2014 | — |
| SC 13D/A | FORM SC 13D/A | 0001144204-14-002525 | Jan 16, 2014 | — |
| SC 13D/A | SCHEDULE 13D AMENDMENT NO. 7 | 0001193125-13-336460 | Aug 15, 2013 | — |
| SC 13D/A | SC 13D/A | 0001144204-13-025247 | Apr 30, 2013 | — |
| SC 13D/A | SC 13D/A | 0001193125-13-103268 | Mar 12, 2013 | — |
| SC 13D/A | SCHEDULE 13D AMENDMENT NO.5 | 0001193125-13-060314 | Feb 14, 2013 | — |
| SC 13D/A | SCHEDULE 13D AMENDMENT NO. 4 | 0001193125-12-383023 | Sep 6, 2012 | — |
| SC 13D/A | SC 13D/A | 0000950123-11-099461 | Nov 18, 2011 | — |
| SC 13D/A | SC 13D/A | 0000950123-11-079116 | Aug 22, 2011 | — |
| SC 13D/A | SC 13D/A | 0000950123-11-054017 | May 26, 2011 | — |
| SC 13D/A | — | 0001144204-10-013938 | Mar 17, 2010 | — |
| SC 13D/A | — | 0001144204-09-051765 | Oct 6, 2009 | — |
| SC 13D/A | 9/15/09 SCHEDULE 13D | 0001042167-09-000163 | Sep 24, 2009 | — |
| SC 13D/A | HALLADOR PETROLEUM COMPANY SCHEDULE 13D/A JULY 21, 2008 | 0001096906-08-001396 | Jul 23, 2008 | — |
| SC 13D/A | HALLADOR AMD2 | 0001001277-06-000298 | Jul 26, 2006 | — |
| SC 13D/A | AMENDMENT TO SCHEDULE 13D | 0000950134-05-024007 | Dec 30, 2005 | — |
| SC 13D/A | — | 0001001277-03-000039 | Jan 31, 2003 | — |