Black Hills Corp /SD/ SEC filings BKH
Black Hills Corp /SD/ has 1,001 filings in SEC EDGAR's recent list, going back to Aug 4, 2016. Its latest annual report, Form ARS, was filed on Mar 18, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 6, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Nov 4, 2026 (results of operations). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 8-K |
Current report
Results of operations
|
Nov 4, 2026 | Nov 4, 2026 |
| 8-K |
Current report
Regulation FD disclosure
|
Oct 23, 2026 | Oct 22, 2026 |
| 8-K |
Current report
Regulation FD disclosure
|
Oct 6, 2026 | Oct 6, 2026 |
| 8-K |
Current report
Other events
|
Aug 17, 2026 | Aug 17, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 7, 2026 | — |
| 10-Q | Quarterly report | Aug 6, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Results of operations
|
Aug 5, 2026 | Aug 5, 2026 |
| 11-K | Employee savings plan report | Jun 18, 2026 | Dec 31, 2025 |
| 4 | Insider transaction | May 28, 2026 | May 27, 2026 |
| 424B5 | Prospectus supplement | May 19, 2026 | — |
| S-3ASR | Automatic shelf registration | May 19, 2026 | — |
| 8-K |
Current report
Other events
|
May 15, 2026 | May 15, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | May 12, 2026 | — |
| 10-Q | Quarterly report | May 7, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Results of operations
|
May 6, 2026 | May 6, 2026 |
| 4 | Insider transaction | May 4, 2026 | May 1, 2026 |
| 4 | Insider transaction | May 4, 2026 | May 1, 2026 |
| 4 | Insider transaction | May 4, 2026 | May 1, 2026 |
| 4 | Insider transaction | May 4, 2026 | May 1, 2026 |
| 4 | Insider transaction | May 4, 2026 | May 1, 2026 |
| 4 | Insider transaction | May 4, 2026 | May 1, 2026 |
| 4 | Insider transaction | May 4, 2026 | May 1, 2026 |
| 4 | Insider transaction | May 4, 2026 | May 1, 2026 |
| 4 | Insider transaction | May 4, 2026 | May 1, 2026 |
| 8-K |
Current report
Shareholder vote results
|
May 1, 2026 | Apr 29, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 29, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 29, 2026 | — |
| 8-K |
Current report
Shareholder vote results, Regulation FD disclosure
|
Apr 2, 2026 | Apr 2, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 26, 2026 | — |
| ARS | Annual report to shareholders | Mar 18, 2026 | Dec 31, 2025 |
| DEF 14A | Proxy statement | Mar 18, 2026 | Apr 29, 2026 |
| 8-K |
Current report
Other events
|
Feb 19, 2026 | Feb 19, 2026 |
| 4 | Insider transaction | Feb 18, 2026 | Dec 1, 2025 |
| 4 | Insider transaction | Feb 13, 2026 | Feb 12, 2026 |
| 4 | Insider transaction | Feb 13, 2026 | Feb 12, 2026 |
| 4 | Insider transaction | Feb 13, 2026 | Feb 12, 2026 |
| 10-K | Annual report | Feb 11, 2026 | Dec 31, 2025 |
| 4 | Insider transaction | Feb 10, 2026 | Feb 6, 2026 |
| 4 | Insider transaction | Feb 10, 2026 | Feb 6, 2026 |
| 4 | Insider transaction | Feb 10, 2026 | Feb 6, 2026 |
| 4 | Insider transaction | Feb 10, 2026 | Feb 6, 2026 |
| 4 | Insider transaction | Feb 10, 2026 | Feb 6, 2026 |
| 4 | Insider transaction | Feb 10, 2026 | Feb 6, 2026 |
| EFFECT | Filing | Feb 6, 2026 | — |
| 5 | Annual insider ownership | Feb 6, 2026 | Dec 31, 2024 |
| 5 | Annual insider ownership | Feb 6, 2026 | Dec 31, 2024 |
| 5 | Annual insider ownership | Feb 6, 2026 | Dec 31, 2024 |
| 5 | Annual insider ownership | Feb 6, 2026 | Dec 31, 2024 |
| 5 | Annual insider ownership | Feb 6, 2026 | Dec 31, 2024 |
| 5 | Annual insider ownership | Feb 6, 2026 | Dec 31, 2024 |
| 5 | Annual insider ownership | Feb 6, 2026 | Dec 31, 2024 |
| 5 | Annual insider ownership | Feb 6, 2026 | Dec 31, 2024 |
| 5 | Annual insider ownership | Feb 6, 2026 | Dec 31, 2024 |
| 424B3 | Prospectus | Feb 6, 2026 | — |
| 425 | Filing | Feb 6, 2026 | — |
| CORRESP | Letter to the SEC | Feb 5, 2026 | — |
| 5 | Annual insider ownership | Feb 5, 2026 | Dec 31, 2024 |
| 5 | Annual insider ownership | Feb 5, 2026 | Dec 31, 2024 |
| CORRESP | Letter to the SEC | Feb 4, 2026 | — |
| 8-K |
Current report
Results of operations
|
Feb 4, 2026 | Feb 4, 2026 |
| 425 | Filing | Jan 30, 2026 | — |
| S-4 | Registration for a merger or exchange | Jan 30, 2026 | — |
| 4 | Insider transaction | Nov 12, 2025 | Nov 10, 2025 |
| 4 | Insider transaction | Nov 10, 2025 | Nov 7, 2025 |
| 425 | Filing | Nov 10, 2025 | — |
| 10-Q | Quarterly report | Nov 6, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Results of operations
|
Nov 5, 2025 | Nov 5, 2025 |
| DRSLTR | Filing | Oct 30, 2025 | — |
| DRS | Filing | Oct 30, 2025 | — |
| 3 | Initial insider ownership | Oct 17, 2025 | Oct 13, 2025 |
| 8-K |
Current report
Material agreement, New debt, Other events
|
Oct 2, 2025 | Oct 2, 2025 |
| 8-K |
Current report
Material agreement
|
Sep 29, 2025 | Sep 25, 2025 |
| 424B2 | Prospectus | Sep 26, 2025 | — |
| FWP | Free writing prospectus | Sep 25, 2025 | — |
| 424B5 | Prospectus supplement | Sep 25, 2025 | — |
| 8-K |
Current report
Other events
|
Sep 15, 2025 | Sep 15, 2025 |
| 4 | Insider transaction | Aug 21, 2025 | Aug 1, 2025 |
| 3 | Initial insider ownership | Aug 20, 2025 | Jul 21, 2025 |
| 425 | Filing | Aug 19, 2025 | — |
| 425 | Filing | Aug 19, 2025 | — |
| 425 | Filing | Aug 19, 2025 | — |
| 425 | Filing | Aug 19, 2025 | — |
| 425 | Filing | Aug 19, 2025 | — |
| 425 | Filing | Aug 19, 2025 | — |
| 425 | Filing | Aug 19, 2025 | — |
| 425 | Filing | Aug 19, 2025 | — |
| 425 | Filing | Aug 19, 2025 | — |
| 425 | Filing | Aug 19, 2025 | — |
| 425 | Filing | Aug 19, 2025 | — |
| 425 | Filing | Aug 19, 2025 | — |
| 425 | Filing | Aug 19, 2025 | — |
| 425 | Filing | Aug 19, 2025 | — |
| 425 | Filing | Aug 19, 2025 | — |
| 8-K |
Current report
Material agreement, Officer or director change, Bylaw or fiscal year change, Regulation FD disclosure
|
Aug 19, 2025 | Aug 18, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 19, 2025 | Aug 19, 2025 |
| 10-Q | Quarterly report | Jul 31, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Results of operations
|
Jul 30, 2025 | Jul 30, 2025 |
| 11-K | Employee savings plan report | Jun 23, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Material agreement
|
May 8, 2025 | May 8, 2025 |
| 424B5 | Prospectus supplement | May 8, 2025 | — |
| 10-Q | Quarterly report | May 8, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Results of operations
|
May 8, 2025 | May 7, 2025 |
| 4 | Insider transaction | May 2, 2025 | May 1, 2025 |
| 4 | Insider transaction | May 2, 2025 | May 1, 2025 |
| 4 | Insider transaction | May 2, 2025 | May 1, 2025 |
| 4 | Insider transaction | May 2, 2025 | May 1, 2025 |
| 4 | Insider transaction | May 2, 2025 | May 1, 2025 |
| 4 | Insider transaction | May 2, 2025 | May 1, 2025 |
| 4 | Insider transaction | May 2, 2025 | May 1, 2025 |
| 4 | Insider transaction | May 2, 2025 | May 1, 2025 |
| 4 | Insider transaction | May 2, 2025 | May 1, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Apr 30, 2025 | — |
| 3 | Initial insider ownership | Apr 28, 2025 | Apr 23, 2025 |
| 3 | Initial insider ownership | Apr 28, 2025 | Apr 23, 2025 |
| 8-K |
Current report
Shareholder vote results
|
Apr 25, 2025 | Apr 23, 2025 |
| ARS | Annual report to shareholders | Mar 14, 2025 | Dec 31, 2024 |
| DEF 14A | Proxy statement | Mar 14, 2025 | Mar 12, 2025 |
| 4 | Insider transaction | Feb 20, 2025 | Feb 18, 2025 |
| 5 | Annual insider ownership | Feb 18, 2025 | Dec 31, 2024 |
| 4 | Insider transaction | Feb 14, 2025 | Feb 12, 2025 |
| 4 | Insider transaction | Feb 14, 2025 | Feb 12, 2025 |
| 4 | Insider transaction | Feb 14, 2025 | Feb 12, 2025 |
| 4 | Insider transaction | Feb 14, 2025 | Feb 12, 2025 |
| 5 | Annual insider ownership | Feb 14, 2025 | Dec 31, 2024 |
| 5 | Annual insider ownership | Feb 14, 2025 | Dec 31, 2024 |
| 5 | Annual insider ownership | Feb 14, 2025 | Dec 31, 2024 |
| 5 | Annual insider ownership | Feb 14, 2025 | Dec 31, 2024 |
| 5 | Annual insider ownership | Feb 14, 2025 | Dec 31, 2024 |
| 5 | Annual insider ownership | Feb 14, 2025 | Dec 31, 2024 |
| 5 | Annual insider ownership | Feb 14, 2025 | Dec 31, 2024 |
| 5 | Annual insider ownership | Feb 14, 2025 | Dec 31, 2024 |
| 4 | Insider transaction | Feb 13, 2025 | Feb 11, 2025 |
| 4 | Insider transaction | Feb 13, 2025 | Feb 11, 2025 |
| 4 | Insider transaction | Feb 13, 2025 | Feb 11, 2025 |
| 4 | Insider transaction | Feb 13, 2025 | Feb 11, 2025 |
| 10-K | Annual report | Feb 12, 2025 | Dec 31, 2024 |
| 4 | Insider transaction | Feb 10, 2025 | Feb 7, 2025 |
| 4 | Insider transaction | Feb 10, 2025 | Feb 7, 2025 |
| 4 | Insider transaction | Feb 10, 2025 | Feb 7, 2025 |
| 4 | Insider transaction | Feb 10, 2025 | Feb 7, 2025 |
| 4 | Insider transaction | Feb 10, 2025 | Feb 7, 2025 |
| 4 | Insider transaction | Feb 10, 2025 | Feb 7, 2025 |
| 5 | Annual insider ownership | Feb 10, 2025 | Dec 31, 2024 |
| 5 | Annual insider ownership | Feb 10, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Officer or director change
|
Feb 7, 2025 | Jan 31, 2025 |
| 8-K |
Current report
Results of operations
|
Feb 5, 2025 | Feb 5, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 5, 2025 | — |
| 3 | Initial insider ownership | Nov 19, 2024 | Nov 13, 2024 |
| 4 | Insider transaction | Nov 12, 2024 | Nov 8, 2024 |
| 3 | Initial insider ownership | Nov 7, 2024 | Nov 7, 2024 |
| 10-Q | Quarterly report | Nov 7, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Results of operations
|
Nov 6, 2024 | Nov 6, 2024 |
| 8-K |
Current report
Officer or director change
|
Nov 1, 2024 | Oct 28, 2024 |
| 8-K |
Current report
Officer or director change
|
Aug 12, 2024 | Aug 9, 2024 |
| 10-Q | Quarterly report | Aug 1, 2024 | Jun 30, 2024 |
| 8-K |
Current report
Results of operations
|
Jul 31, 2024 | Jul 31, 2024 |
| 11-K | Employee savings plan report | Jun 20, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Material agreement, New debt
|
Jun 5, 2024 | May 31, 2024 |
| 4 | Insider transaction | Jun 3, 2024 | May 30, 2024 |
| 144 | Notice of proposed sale | May 30, 2024 | — |
| 8-K |
Current report
Material agreement, New debt, Other events
|
May 16, 2024 | May 13, 2024 |
| 424B2 | Prospectus | May 14, 2024 | — |
| FWP | Free writing prospectus | May 13, 2024 | — |
| 424B5 | Prospectus supplement | May 13, 2024 | — |
| 10-Q | Quarterly report | May 9, 2024 | Mar 31, 2024 |
| 8-K |
Current report
Results of operations
|
May 8, 2024 | May 8, 2024 |
| 4 | Insider transaction | May 2, 2024 | Apr 30, 2024 |
| 4 | Insider transaction | May 2, 2024 | Apr 30, 2024 |
| 4 | Insider transaction | May 2, 2024 | Apr 30, 2024 |
| 4 | Insider transaction | May 2, 2024 | Apr 30, 2024 |
| 4 | Insider transaction | May 2, 2024 | Apr 30, 2024 |
| 4 | Insider transaction | May 2, 2024 | Apr 30, 2024 |
| 4 | Insider transaction | May 2, 2024 | Apr 30, 2024 |
| 4 | Insider transaction | May 2, 2024 | Apr 30, 2024 |
| 4 | Insider transaction | May 2, 2024 | Apr 30, 2024 |
| 8-K |
Current report
Shareholder vote results
|
Apr 26, 2024 | Apr 23, 2024 |
| 8-K |
Current report
Officer or director change
|
Apr 25, 2024 | Apr 24, 2024 |
| ARS | Annual report to shareholders | Mar 15, 2024 | Dec 31, 2023 |
| DEF 14A | Proxy statement | Mar 15, 2024 | Mar 15, 2024 |
| 4 | Insider transaction | Mar 6, 2024 | Mar 5, 2024 |
| 10-K | Annual report | Feb 14, 2024 | Dec 31, 2023 |
| 4 | Insider transaction | Feb 13, 2024 | Jan 10, 2024 |
| 4 | Insider transaction | Feb 13, 2024 | Feb 9, 2024 |
| 4 | Insider transaction | Feb 13, 2024 | Feb 9, 2024 |
| 4 | Insider transaction | Feb 13, 2024 | Feb 9, 2024 |
| 4 | Insider transaction | Feb 13, 2024 | Feb 9, 2024 |
| 4 | Insider transaction | Feb 13, 2024 | Feb 9, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2024 | — |
| 5 | Annual insider ownership | Feb 13, 2024 | Dec 31, 2023 |
| 5 | Annual insider ownership | Feb 13, 2024 | Dec 31, 2023 |
| 5 | Annual insider ownership | Feb 13, 2024 | Dec 31, 2023 |
| 5 | Annual insider ownership | Feb 13, 2024 | Dec 31, 2023 |
| 5 | Annual insider ownership | Feb 13, 2024 | Dec 31, 2023 |
| 5 | Annual insider ownership | Feb 13, 2024 | Dec 31, 2023 |
| 5 | Annual insider ownership | Feb 13, 2024 | Dec 31, 2023 |
| 5 | Annual insider ownership | Feb 13, 2024 | Dec 31, 2023 |
| 5 | Annual insider ownership | Feb 13, 2024 | Dec 31, 2023 |
| 5 | Annual insider ownership | Feb 13, 2024 | Dec 31, 2023 |
| 5 | Annual insider ownership | Feb 13, 2024 | Dec 31, 2023 |
| 5 | Annual insider ownership | Feb 13, 2024 | Dec 31, 2023 |
Showing 200 filings, the most recent 200. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Electric Services (SIC 4911)
- Listed as
- BKH (NYSE)
- Fiscal year ends
- December 31
- Incorporated in
- SD
- Headquarters
- Rapid City, SD
- SEC filer status
- Large accelerated filer
- SEC CIK
- 1130464
- Former names
- BLACK HILLS HOLDING CORP (until Dec 26, 2000)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.