HALLADOR ENERGY CO — All Filings
844 total filings on record
Public companies registered with the SEC are required to file periodic reports, disclosures, and notices throughout the year. The most important are the 10-K (annual report), 10-Q (quarterly report), and 8-K (material event notice). Use the filters below to narrow by form type.
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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 |
|---|---|---|---|---|
| 8-K | 8-K | 0001104659-26-036234 | Mar 27, 2026 | Mar 25, 2026 |
| SCHEDULE 13G/A | — | 0000102909-26-000417 | Mar 26, 2026 | — |
| 3 | — | 0002123678-26-000002 | Mar 25, 2026 | Mar 6, 2026 |
| 8-K | 8-K | 0001104659-26-027176 | Mar 12, 2026 | — |
| 10-K | 10-K | 0001104659-26-027174 | Mar 12, 2026 | Dec 31, 2025 |
| 4 | — | 0002102403-26-000003 | Mar 11, 2026 | Mar 10, 2026 |
| 8-K | 8-K | 0001104659-26-025949 | Mar 10, 2026 | Mar 5, 2026 |
| 8-K | 8-K | 0001104659-26-025346 | Mar 9, 2026 | Mar 6, 2026 |
| SCHEDULE 13D/A | — | 0001104659-26-021770 | Feb 27, 2026 | — |
| SCHEDULE 13G | — | 0002012383-26-000672 | Jan 21, 2026 | — |
| 3 | — | 0002106207-26-000002 | Jan 20, 2026 | Jan 1, 2026 |
| 4 | — | 0002030612-26-000004 | Jan 16, 2026 | Jan 14, 2026 |
| 4 | — | 0001750200-26-000004 | Jan 16, 2026 | Jan 14, 2026 |
| 8-K | FORM 8-K | 0001104659-26-004150 | Jan 15, 2026 | Jan 13, 2026 |
| 424B5 | 424B5 | 0001104659-26-003768 | Jan 14, 2026 | — |
| 424B5 | 424B5 | 0001104659-26-003347 | Jan 13, 2026 | — |
| S-3ASR | S-3ASR | 0001104659-26-003317 | Jan 13, 2026 | — |
| 8-K | 8-K | 0001104659-26-001098 | Jan 6, 2026 | Dec 30, 2025 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-26-000280 | Jan 2, 2026 | Dec 31, 2025 |
| 4 | — | 0001750200-26-000002 | Jan 2, 2026 | Dec 30, 2025 |
| 4 | — | 0001032385-25-000005 | Dec 31, 2025 | Dec 30, 2025 |
| 4 | — | 0002030612-25-000003 | Dec 31, 2025 | Dec 30, 2025 |
| 3 | — | 0002102403-25-000003 | Dec 22, 2025 | Dec 1, 2025 |
| 4 | — | 0001750200-25-000005 | Dec 19, 2025 | Dec 17, 2025 |
| 424B5 | 424B5 | 0001104659-25-121575 | Dec 16, 2025 | — |
| 8-K | 8-K | 0001104659-25-118446 | Dec 4, 2025 | Dec 1, 2025 |
| 4 | — | 0001750200-25-000003 | Nov 21, 2025 | — |
| 144 | — | 0001104659-25-111051 | Nov 13, 2025 | — |
| 144 | — | 0001104659-25-110704 | Nov 12, 2025 | — |
| SCHEDULE 13G/A | — | 0001104659-25-109754 | Nov 12, 2025 | — |
| 10-Q | 10-Q | 0001104659-25-109301 | Nov 10, 2025 | Sep 30, 2025 |
| 8-K | 8-K | 0001104659-25-109272 | Nov 10, 2025 | — |
| SCHEDULE 13G | — | 0001193125-25-270298 | Nov 6, 2025 | — |
| SCHEDULE 13G/A | — | 0002012383-25-002585 | Oct 17, 2025 | — |
| 4 | OWNERSHIP DOCUMENT | 0001104659-25-096752 | Oct 3, 2025 | Oct 1, 2025 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-25-095738 | Oct 1, 2025 | Sep 29, 2025 |
| 4 | — | 0002076979-25-000002 | Sep 30, 2025 | Sep 26, 2025 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-25-094557 | Sep 29, 2025 | Sep 25, 2025 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-25-092939 | Sep 24, 2025 | Sep 22, 2025 |
| UPLOAD | — | 0000000000-25-009680 | Sep 8, 2025 | — |
| CORRESP | — | 0001558370-25-011811 | Aug 28, 2025 | — |
| 4 | — | 0001415889-25-022392 | Aug 19, 2025 | — |
| 144 | — | 0001104659-25-079757 | Aug 18, 2025 | — |
| 144 | — | 0001104659-25-077712 | Aug 13, 2025 | — |
| CORRESP | — | 0001558370-25-011215 | Aug 12, 2025 | — |
| 10-Q | 10-Q | 0001558370-25-011085 | Aug 11, 2025 | Jun 30, 2025 |
| 8-K | 8-K | 0001558370-25-011065 | Aug 11, 2025 | — |
| UPLOAD | — | 0000000000-25-008262 | Aug 6, 2025 | — |
| SCHEDULE 13G | — | 0000932471-25-000845 | Jul 29, 2025 | — |
| SCHEDULE 13G | — | 0002052113-25-003062 | Jul 17, 2025 | — |