# Hallador Energy Co: filings

HNRG · Nasdaq · CIK 788965 · [Utilities](/sectors/utilities.md) · fiscal year ends Dec 31

Pages: [Overview](/companies/hnrg.md) · [Financials](/companies/hnrg/financials.md) · [Filings](/companies/hnrg/filings.md) · [Insiders](/companies/hnrg/insiders.md)

## Reports and events: 280 filings

Newest first, by EDGAR acceptance time (Eastern). Filter with ?form= one of: `periodic`, `8-K`, `10-K`, `10-Q`, `4`, `proxy`, `13dg`, `all`, or any form this company filed (4 300, 8-K 151, 10-Q 53, SC 13D/A 32, UPLOAD 20, 10-K 18, CORRESP 18, 3 15, DEF 14A 11, 4/A 10, 144 8, DEFA14A 6, SCHEDULE 13G/A 6, 10-K/A 5, 3/A 5, DEF 14C 5, SC 13G/A 5, SCHEDULE 13G 5, 424B5 4, 5 4, S-8 4, SC 13G 4, 10-Q/A 3, 8-K/A 3, SC 13D 3, EFFECT 2, S-3 2, S-3/A 2, 8-A12B 1, CERTNAS 1, D 1, NT 10-Q 1, PRE 14A 1, S-3ASR 1, SCHEDULE 13D/A 1).

| Filed | Accepted | Form | What it is | Accession |
| --- | --- | --- | --- | --- |
| 2026-10-08 | 12:59 ET | [8-K](/filings/0001628280-26-065410.md) | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001628280-26-065410 |
| 2026-09-17 | 12:05 ET | [8-K](/filings/0001104659-26-108429.md) | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001104659-26-108429 |
| 2026-08-14 | 20:35 ET | [8-K](/filings/0001104659-26-097263.md) | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 9.01 Financial statements and exhibits | 0001104659-26-097263 |
| 2026-08-10 | 21:20 ET | [10-Q](/filings/0001104659-26-093468.md) | Quarterly report, period 2026-06-30 | 0001104659-26-093468 |
| 2026-08-10 | 21:00 ET | [8-K](/filings/0001104659-26-093446.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001104659-26-093446 |
| 2026-06-26 | 21:06 ET | [8-K](/filings/0000788965-26-000006.md) | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 9.01 Financial statements and exhibits | 0000788965-26-000006 |
| 2026-06-11 | 21:28 ET | [8-K](/filings/0000788965-26-000004.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0000788965-26-000004 |
| 2026-06-05 | 20:23 ET | [8-K](/filings/0000788965-26-000002.md) | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0000788965-26-000002 |
| 2026-06-03 | 20:30 ET | [8-K](/filings/0001104659-26-070122.md) | 1.04 Item not in the standard list | 0001104659-26-070122 |
| 2026-06-02 | 10:00 ET | [8-K](/filings/0001104659-26-069138.md) | 1.01 Entry into a material agreement; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001104659-26-069138 |
| 2026-05-29 | 21:20 ET | [8-K](/filings/0001104659-26-068374.md) | 5.07 Shareholder vote results | 0001104659-26-068374 |
| 2026-05-06 | 21:21 ET | [10-Q](/filings/0001104659-26-056375.md) | Quarterly report, period 2026-03-31 | 0001104659-26-056375 |
| 2026-05-06 | 21:10 ET | [8-K](/filings/0001104659-26-056354.md) | 5.02 Departure or appointment of officers or directors; 8.01 Other events | 0001104659-26-056354 |
| 2026-05-06 | 21:00 ET | [8-K](/filings/0001104659-26-056345.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001104659-26-056345 |
| 2026-04-15 | 21:27 ET | [DEF 14A](/filings/0001104659-26-043867.md) | Proxy statement, period 2026-05-27 | 0001104659-26-043867 |
| 2026-04-15 | 21:10 ET | [8-K](/filings/0001104659-26-043845.md) | 5.02 Departure or appointment of officers or directors | 0001104659-26-043845 |
| 2026-03-27 | 21:15 ET | [8-K](/filings/0001104659-26-036234.md) | 1.04 Item not in the standard list; 9.01 Financial statements and exhibits | 0001104659-26-036234 |
| 2026-03-12 | 21:27 ET | [8-K](/filings/0001104659-26-027176.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001104659-26-027176 |
| 2026-03-12 | 21:26 ET | [10-K](/filings/0001104659-26-027174.md) | Annual report, period 2025-12-31 | 0001104659-26-027174 |
| 2026-03-10 | 21:27 ET | [8-K](/filings/0001104659-26-025949.md) | 1.01 Entry into a material agreement; 1.02 Termination of a material agreement; 2.03 New direct financial obligation; 9.01 Financial statements and exhibits | 0001104659-26-025949 |
| 2026-03-09 | 21:25 ET | [8-K](/filings/0001104659-26-025346.md) | 5.02 Departure or appointment of officers or directors; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001104659-26-025346 |
| 2026-02-27 | 01:17 ET | [SCHEDULE 13D/A](/filings/0001104659-26-021770.md) | Ownership report, active investor, amended | 0001104659-26-021770 |
| 2026-01-15 | 22:08 ET | [8-K](/filings/0001104659-26-004150.md) | 1.02 Termination of a material agreement; 8.01 Other events; 9.01 Financial statements and exhibits | 0001104659-26-004150 |
| 2026-01-06 | 13:05 ET | [8-K](/filings/0001104659-26-001098.md) | 5.02 Departure or appointment of officers or directors; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001104659-26-001098 |
| 2025-12-04 | 21:00 ET | [8-K](/filings/0001104659-25-118446.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001104659-25-118446 |
| 2025-11-10 | 22:24 ET | [10-Q](/filings/0001104659-25-109301.md) | Quarterly report, period 2025-09-30 | 0001104659-25-109301 |
| 2025-11-10 | 22:05 ET | [8-K](/filings/0001104659-25-109272.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001104659-25-109272 |
| 2025-08-11 | 21:25 ET | [10-Q](/filings/0001558370-25-011085.md) | Quarterly report, period 2025-06-30 | 0001558370-25-011085 |
| 2025-08-11 | 20:47 ET | [8-K](/filings/0001558370-25-011065.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001558370-25-011065 |
| 2025-06-04 | 12:35 ET | [8-K](/filings/0001558370-25-008383.md) | 5.02 Departure or appointment of officers or directors; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001558370-25-008383 |
| 2025-06-02 | 17:58 ET | [8-K](/filings/0001558370-25-008332.md) | 5.02 Departure or appointment of officers or directors; 5.07 Shareholder vote results; 9.01 Financial statements and exhibits | 0001558370-25-008332 |
| 2025-05-22 | 20:37 ET | [8-K](/filings/0001558370-25-008111.md) | 8.01 Other events | 0001558370-25-008111 |
| 2025-05-12 | 21:20 ET | [10-Q](/filings/0001558370-25-007429.md) | Quarterly report, period 2025-03-31 | 0001558370-25-007429 |
| 2025-05-12 | 20:19 ET | [8-K](/filings/0001558370-25-007392.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001558370-25-007392 |
| 2025-04-17 | 18:30 ET | [DEF 14A](/filings/0001558370-25-004951.md) | Proxy statement, period 2025-05-29 | 0001558370-25-004951 |
| 2025-03-17 | 21:29 ET | [8-K](/filings/0001558370-25-003147.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001558370-25-003147 |
| 2025-03-17 | 21:17 ET | [10-K](/filings/0001558370-25-003141.md) | Annual report, period 2024-12-31 | 0001558370-25-003141 |
| 2025-01-07 | 14:40 ET | [8-K](/filings/0001558370-25-000046.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0001558370-25-000046 |
| 2024-11-12 | 22:20 ET | [10-Q](/filings/0001558370-24-015355.md) | Quarterly report, period 2024-09-30 | 0001558370-24-015355 |
| 2024-11-12 | 21:55 ET | [8-K](/filings/0001558370-24-015342.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001558370-24-015342 |
| 2024-10-03 | 21:26 ET | [8-K](/filings/0001437749-24-030649.md) | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 9.01 Financial statements and exhibits | 0001437749-24-030649 |
| 2024-09-03 | 21:24 ET | [SC 13D/A](/filings/0001437749-24-028278.md) | Ownership report, active investor, amended | 0001437749-24-028278 |
| 2024-08-07 | 21:27 ET | [10-Q](/filings/0001437749-24-025219.md) | Quarterly report, period 2024-06-30 | 0001437749-24-025219 |
| 2024-08-07 | 21:31 ET | [8-K](/filings/0001437749-24-024963.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001437749-24-024963 |
| 2024-07-23 | 23:49 ET | [SC 13D/A](/filings/0001104659-24-082010.md) | Ownership report, active investor, amended | 0001104659-24-082010 |
| 2024-07-03 | 20:31 ET | [8-K](/filings/0001437749-24-022186.md) | 3.02 Unregistered sale of equity; 8.01 Other events | 0001437749-24-022186 |
| 2024-06-03 | 13:32 ET | [8-K](/filings/0001437749-24-018969.md) | 5.07 Shareholder vote results; 9.01 Financial statements and exhibits | 0001437749-24-018969 |
| 2024-05-07 | 21:23 ET | [10-Q](/filings/0001437749-24-015139.md) | Quarterly report, period 2024-03-31 | 0001437749-24-015139 |
| 2024-05-07 | 00:40 ET | [8-K](/filings/0001437749-24-014892.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001437749-24-014892 |
| 2024-04-19 | 19:51 ET | [DEF 14A](/filings/0001437749-24-012550.md) | Proxy statement, period 2024-05-30 | 0001437749-24-012550 |

Page 1 of 6. [Older](/companies/hnrg/filings.md?page=2)
Source: SEC EDGAR, the company’s filing index. Last ingested by Listed: Oct 24, 2026, 14:56 ET. No prices; not investment advice.