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 |
| 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 |
| 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 |
| 10-Q | Quarterly report | May 7, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Results of operations
|
May 6, 2026 | May 6, 2026 |
| 8-K |
Current report
Shareholder vote results
|
May 1, 2026 | Apr 29, 2026 |
| 8-K |
Current report
Shareholder vote results, Regulation FD disclosure
|
Apr 2, 2026 | Apr 2, 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 |
| 10-K | Annual report | Feb 11, 2026 | Dec 31, 2025 |
| EFFECT | Filing | Feb 6, 2026 | — |
| 424B3 | Prospectus | Feb 6, 2026 | — |
| 425 | Filing | Feb 6, 2026 | — |
| CORRESP | Letter to the SEC | Feb 5, 2026 | — |
| 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 | — |
| 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 | — |
| 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 |
| 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 |
| 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 |
| 10-K | Annual report | Feb 12, 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 |
| 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 |
| 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 |
| 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 |
| 10-K | Annual report | Feb 14, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Results of operations
|
Feb 7, 2024 | Feb 7, 2024 |
| 10-Q | Quarterly report | Nov 2, 2023 | Sep 30, 2023 |
| 8-K |
Current report
Results of operations
|
Nov 1, 2023 | Nov 1, 2023 |
| 8-K |
Current report
Material agreement, New debt, Other events
|
Sep 15, 2023 | Sep 15, 2023 |
| 8-K |
Current report
Material agreement
|
Sep 11, 2023 | Sep 6, 2023 |
| 424B2 | Prospectus | Sep 7, 2023 | — |
| FWP | Free writing prospectus | Sep 6, 2023 | — |
| 424B5 | Prospectus supplement | Sep 6, 2023 | — |
| 10-Q | Quarterly report | Aug 3, 2023 | Jun 30, 2023 |
| 8-K |
Current report
Results of operations
|
Aug 2, 2023 | Aug 2, 2023 |
| POSASR | Filing | Jul 10, 2023 | — |
| 11-K | Employee savings plan report | Jun 22, 2023 | Dec 31, 2022 |
| 8-K |
Current report
Material agreement, Agreement ended
|
Jun 20, 2023 | Jun 16, 2023 |
| 424B5 | Prospectus supplement | Jun 16, 2023 | — |
| S-3ASR | Automatic shelf registration | Jun 16, 2023 | — |
| 8-K |
Current report
Officer or director change
|
Jun 15, 2023 | Jun 14, 2023 |
| 10-Q | Quarterly report | May 4, 2023 | Mar 31, 2023 |
| 8-K |
Current report
Results of operations, Bylaw or fiscal year change
|
May 3, 2023 | Apr 24, 2023 |
| 8-K |
Current report
Shareholder vote results
|
Apr 27, 2023 | Apr 25, 2023 |
| ARS | Annual report to shareholders | Mar 15, 2023 | Dec 31, 2022 |
| DEF 14A | Proxy statement | Mar 15, 2023 | — |
| 8-K |
Current report
Material agreement, New debt, Other events
|
Mar 7, 2023 | Mar 2, 2023 |
| 424B2 | Prospectus | Mar 3, 2023 | — |
| FWP | Free writing prospectus | Mar 2, 2023 | — |
| 424B5 | Prospectus supplement | Mar 2, 2023 | — |
| 10-K | Annual report | Feb 14, 2023 | Dec 31, 2022 |
| 8-K |
Current report
Results of operations
|
Feb 7, 2023 | Feb 7, 2023 |
| 10-Q | Quarterly report | Nov 3, 2022 | Sep 30, 2022 |
| 8-K |
Current report
Results of operations
|
Nov 2, 2022 | Nov 2, 2022 |
| 8-K |
Current report
Officer or director change
|
Oct 27, 2022 | Oct 27, 2022 |
| 10-Q | Quarterly report | Aug 4, 2022 | Jun 30, 2022 |
| 8-K |
Current report
Results of operations
|
Aug 3, 2022 | Aug 3, 2022 |
| 11-K | Employee savings plan report | Jun 23, 2022 | Dec 31, 2021 |
| S-8 | Employee stock plan registration | May 5, 2022 | — |
| 10-Q | Quarterly report | May 5, 2022 | Mar 31, 2022 |
| 8-K |
Current report
Results of operations
|
May 4, 2022 | May 4, 2022 |
| 8-K |
Current report
Shareholder vote results
|
Apr 28, 2022 | Apr 26, 2022 |
| DEF 14A | Proxy statement | Mar 17, 2022 | Apr 26, 2022 |
| 10-K | Annual report | Feb 15, 2022 | Dec 31, 2021 |
| 8-K |
Current report
Results of operations
|
Feb 9, 2022 | Feb 9, 2022 |
| 10-Q | Quarterly report | Nov 3, 2021 | Sep 30, 2021 |
| 8-K |
Current report
Results of operations
|
Nov 2, 2021 | Nov 2, 2021 |
| 8-K |
Current report
Officer or director change
|
Sep 17, 2021 | Sep 15, 2021 |
| 8-K |
Current report
Material agreement, New debt, Other events
|
Aug 26, 2021 | Aug 23, 2021 |
| 424B2 | Prospectus | Aug 24, 2021 | — |
| FWP | Free writing prospectus | Aug 23, 2021 | — |
| 424B5 | Prospectus supplement | Aug 23, 2021 | — |
| 10-Q | Quarterly report | Aug 4, 2021 | Jun 30, 2021 |
| 8-K |
Current report
Results of operations
|
Aug 3, 2021 | Aug 3, 2021 |
| 8-K |
Current report
Material agreement, New debt
|
Jul 19, 2021 | Jul 19, 2021 |
| 11-K | Employee savings plan report | Jun 22, 2021 | Dec 31, 2020 |
| 10-Q | Quarterly report | May 5, 2021 | Mar 31, 2021 |
| 8-K |
Current report
Results of operations
|
May 4, 2021 | May 4, 2021 |
| 8-K/A |
Amended current report
Officer or director change
|
Apr 29, 2021 | Sep 16, 2020 |
| 8-K |
Current report
Shareholder vote results
|
Apr 29, 2021 | Apr 27, 2021 |
| DEF 14A | Proxy statement | Mar 18, 2021 | Apr 27, 2021 |
| 10-K | Annual report | Feb 26, 2021 | Dec 31, 2020 |
| 8-K |
Current report
Material agreement, New debt, Other events
|
Feb 25, 2021 | Feb 24, 2021 |
| 8-K |
Current report
Results of operations
|
Feb 9, 2021 | Feb 9, 2021 |
| 10-Q | Quarterly report | Nov 3, 2020 | Sep 30, 2020 |
| 8-K |
Current report
Results of operations
|
Nov 2, 2020 | Nov 2, 2020 |
| 8-K |
Current report
Officer or director change
|
Sep 18, 2020 | Sep 16, 2020 |
| 10-Q | Quarterly report | Aug 4, 2020 | Jun 30, 2020 |
| 424B5 | Prospectus supplement | Aug 4, 2020 | — |
| 8-K |
Current report
Material agreement
|
Aug 4, 2020 | Aug 4, 2020 |
| S-3ASR | Automatic shelf registration | Aug 4, 2020 | — |
| S-3ASR | Automatic shelf registration | Aug 4, 2020 | — |
| 8-K |
Current report
Results of operations
|
Aug 4, 2020 | Aug 3, 2020 |
| 11-K | Employee savings plan report | Jun 22, 2020 | Dec 31, 2019 |
| 8-K |
Current report
Material agreement, New debt, Other events
|
Jun 17, 2020 | Jun 12, 2020 |
| 424B2 | Prospectus | Jun 16, 2020 | — |
| FWP | Free writing prospectus | Jun 12, 2020 | — |
| 424B5 | Prospectus supplement | Jun 12, 2020 | — |
| 10-Q | Quarterly report | May 5, 2020 | Mar 31, 2020 |
| 8-K |
Current report
Results of operations
|
May 4, 2020 | May 4, 2020 |
| 8-K |
Current report
Shareholder vote results
|
May 1, 2020 | Apr 28, 2020 |
| 8-K/A |
Amended current report
Officer or director change
|
May 1, 2020 | Oct 29, 2019 |
| DEFA14A | Additional proxy material | Apr 15, 2020 | — |
| DEF 14A | Proxy statement | Mar 13, 2020 | Apr 28, 2020 |
| 8-K |
Current report
Officer or director change
|
Mar 13, 2020 | Mar 9, 2020 |
| 8-K |
Current report
Material agreement, Other events
|
Feb 27, 2020 | Feb 24, 2020 |
| 424B5 | Prospectus supplement | Feb 25, 2020 | — |
| 10-K | Annual report | Feb 14, 2020 | Dec 31, 2019 |
| 8-K |
Current report
Results of operations
|
Feb 6, 2020 | Feb 6, 2020 |
| 10-Q | Quarterly report | Nov 5, 2019 | Sep 30, 2019 |
| 8-K |
Current report
Results of operations
|
Nov 4, 2019 | Nov 4, 2019 |
| 8-K |
Current report
Officer or director change
|
Nov 4, 2019 | Oct 29, 2019 |
| 8-K |
Current report
Material agreement, New debt, Other events
|
Oct 4, 2019 | Oct 3, 2019 |
| 8-K |
Current report
Material agreement
|
Oct 1, 2019 | Sep 26, 2019 |
| 424B2 | Prospectus | Sep 30, 2019 | — |
| FWP | Free writing prospectus | Sep 26, 2019 | — |
| 424B5 | Prospectus supplement | Sep 26, 2019 | — |
| 10-Q | Quarterly report | Aug 6, 2019 | Jun 30, 2019 |
| 8-K |
Current report
Results of operations
|
Aug 5, 2019 | Aug 5, 2019 |
| 11-K | Employee savings plan report | Jun 21, 2019 | Dec 31, 2018 |
| 8-K |
Current report
Material agreement, New debt
|
Jun 18, 2019 | Jun 17, 2019 |
| 8-K |
Current report
Shareholder vote results
|
May 3, 2019 | Apr 30, 2019 |
| 10-Q | Quarterly report | May 3, 2019 | Mar 31, 2019 |
| 8-K |
Current report
Results of operations
|
May 3, 2019 | May 2, 2019 |
| DEF 14A | Proxy statement | Mar 15, 2019 | Dec 31, 2018 |
| 10-K | Annual report | Feb 19, 2019 | Dec 31, 2018 |
| 8-K |
Current report
Other events
|
Feb 15, 2019 | Feb 14, 2019 |
| 8-K |
Current report
Results of operations
|
Feb 7, 2019 | Feb 7, 2019 |
| 10-Q | Quarterly report | Nov 6, 2018 | Sep 30, 2018 |
| 8-K |
Current report
Results of operations
|
Nov 5, 2018 | Nov 5, 2018 |
| 25-NSE | Delisting notice | Nov 1, 2018 | — |
| 8-K |
Current report
Officer or director change
|
Nov 1, 2018 | Oct 31, 2018 |
| 8-K |
Current report
Material agreement, New debt, Other events
|
Aug 17, 2018 | Aug 14, 2018 |
| 424B5 | Prospectus supplement | Aug 16, 2018 | — |
| FWP | Free writing prospectus | Aug 15, 2018 | — |
| 424B5 | Prospectus supplement | Aug 13, 2018 | — |
| 10-Q | Quarterly report | Aug 7, 2018 | Jun 30, 2018 |
| 8-K |
Current report
Results of operations
|
Aug 7, 2018 | Aug 6, 2018 |
| 8-K |
Current report
Material agreement, New debt
|
Jul 31, 2018 | Jul 30, 2018 |
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.