BKH - CIK 0001130464
BLACK HILLS CORP /SD/ has filed 3,087 documents with the SEC between 2000 and 2026. The most frequent type is insider trade (2,124 filings), alongside the regular cadence of annual reports, quarterly reports, and event disclosures every public company must make. Use the filters to focus on one filing type, or flip the sort to trace the company's history from its earliest paperwork.
Data parsed from SEC EDGAR XBRL filings. See the full market cap rankings.
| Filing | Type | Filed | Period covered |
|---|---|---|---|
| Prospectus supplement | 424B5 | 2026-05-19 | - |
| S-3ASR | - | 2026-05-19 | - |
| Major company event | 8-K | 2026-05-15 | 2026-05-15 |
| SCHEDULE 13G | - | 2026-05-12 | - |
| Quarterly report | 10-Q | 2026-05-07 | 2026-03-31 |
| Major company event | 8-K | 2026-05-06 | 2026-05-06 |
| Insider trade | 4 | 2026-05-04 | 2026-05-01 |
| Insider trade | 4 | 2026-05-04 | 2026-05-01 |
| Insider trade | 4 | 2026-05-04 | 2026-05-01 |
| Insider trade | 4 | 2026-05-04 | 2026-05-01 |
| Insider trade | 4 | 2026-05-04 | 2026-05-01 |
| Insider trade | 4 | 2026-05-04 | 2026-05-01 |
| Insider trade | 4 | 2026-05-04 | 2026-05-01 |
| Insider trade | 4 | 2026-05-04 | 2026-05-01 |
| Insider trade | 4 | 2026-05-04 | 2026-05-01 |
| Major company event | 8-K | 2026-05-01 | 2026-04-29 |
| SCHEDULE 13G | - | 2026-04-29 | - |
| SCHEDULE 13G | - | 2026-04-29 | - |
| Major company event | 8-K | 2026-04-02 | 2026-04-02 |
| SCHEDULE 13G/A | - | 2026-03-26 | - |
| Annual report to shareholders | ARS | 2026-03-18 | 2025-12-31 |
| Proxy statement | DEF 14A | 2026-03-18 | 2026-04-29 |
| Major company event | 8-K | 2026-02-19 | 2026-02-19 |
| Insider trade | 4 | 2026-02-18 | 2025-12-01 |
| Insider trade | 4 | 2026-02-13 | 2026-02-12 |
| Insider trade | 4 | 2026-02-13 | 2026-02-12 |
| Insider trade | 4 | 2026-02-13 | 2026-02-12 |
| Annual report | 10-K | 2026-02-11 | 2025-12-31 |
| Insider trade | 4 | 2026-02-10 | 2026-02-06 |
| Insider trade | 4 | 2026-02-10 | 2026-02-06 |
| Insider trade | 4 | 2026-02-10 | 2026-02-06 |
| Insider trade | 4 | 2026-02-10 | 2026-02-06 |
| Insider trade | 4 | 2026-02-10 | 2026-02-06 |
| Insider trade | 4 | 2026-02-10 | 2026-02-06 |
| EFFECT | - | 2026-02-06 | - |
| 425 | - | 2026-02-06 | - |
| Annual insider summary | 5 | 2026-02-06 | 2024-12-31 |
| Annual insider summary | 5 | 2026-02-06 | 2024-12-31 |
| Annual insider summary | 5 | 2026-02-06 | 2024-12-31 |
| Annual insider summary | 5 | 2026-02-06 | 2024-12-31 |
| Annual insider summary | 5 | 2026-02-06 | 2024-12-31 |
| Annual insider summary | 5 | 2026-02-06 | 2024-12-31 |
| Annual insider summary | 5 | 2026-02-06 | 2024-12-31 |
| Annual insider summary | 5 | 2026-02-06 | 2024-12-31 |
| Annual insider summary | 5 | 2026-02-06 | 2024-12-31 |
| 424B3 | - | 2026-02-06 | - |
| Annual insider summary | 5 | 2026-02-05 | 2024-12-31 |
| Annual insider summary | 5 | 2026-02-05 | 2024-12-31 |
| Major company event | 8-K | 2026-02-04 | 2026-02-04 |
| 425 | - | 2026-01-30 | - |