Black Hawk Acquisition Corp SEC filings BKHAU
Black Hawk Acquisition Corp has 117 filings in SEC EDGAR's recent list, going back to Dec 21, 2023. Its latest annual report, Form 10-K, was filed on Mar 6, 2026 for the period ended Nov 30, 2025. The latest quarterly report (Form 10-Q) was filed on Oct 6, 2026, covering the quarter ended Aug 31, 2026. The most recent current report (Form 8-K) was filed on Oct 23, 2026 (other events). The company's fiscal year ends on November 30.
| Form | Description | Filed | Period |
|---|---|---|---|
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 5, 2026 | — |
| 8-K |
Current report
Other events
|
Oct 23, 2026 | Oct 22, 2026 |
| 8-K |
Current report
Shareholder vote results
|
Oct 13, 2026 | Oct 13, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Oct 7, 2026 | — |
| 10-Q | Quarterly report | Oct 6, 2026 | Aug 31, 2026 |
| 425 | Filing | Sep 25, 2026 | — |
| 8-K |
Current report
Material agreement, Unregistered share sale
|
Sep 24, 2026 | Sep 22, 2026 |
| 8-K |
Current report
Other events
|
Sep 22, 2026 | Sep 22, 2026 |
| 424B4 | Prospectus | Sep 22, 2026 | — |
| EFFECT | Filing | Sep 17, 2026 | — |
| S-4/A | Filing | Sep 4, 2026 | — |
| 8-K |
Current report
Material agreement, New debt, Unregistered share sale
|
Aug 26, 2026 | Aug 21, 2026 |
| 8-K |
Current report
Other events
|
Aug 25, 2026 | Aug 21, 2026 |
| S-4/A | Filing | Aug 3, 2026 | — |
| 8-K |
Current report
Other events
|
Jul 22, 2026 | Jul 22, 2026 |
| 10-Q | Quarterly report | Jul 15, 2026 | May 31, 2026 |
| S-4/A | Filing | Jul 6, 2026 | — |
| S-4/A | Filing | Jun 11, 2026 | — |
| 8-K |
Current report
Material agreement, New debt, Unregistered share sale
|
May 8, 2026 | May 4, 2026 |
| S-4/A | Filing | May 1, 2026 | — |
| 10-K/A | Amended annual report | Apr 28, 2026 | Nov 30, 2025 |
| 10-Q | Quarterly report | Apr 21, 2026 | Feb 28, 2026 |
| NT 10-Q | Filing | Apr 14, 2026 | Feb 28, 2026 |
| 8-K |
Current report
Listing notice
|
Apr 1, 2026 | Apr 1, 2026 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Mar 17, 2026 | Mar 17, 2026 |
| 10-K | Annual report | Mar 6, 2026 | Nov 30, 2025 |
| S-4/A | Filing | Mar 5, 2026 | — |
| NT 10-K | Filing | Mar 2, 2026 | Nov 30, 2025 |
| 8-K |
Current report
Material agreement, New debt, Unregistered share sale
|
Feb 19, 2026 | Feb 19, 2026 |
| 8-K |
Current report
Officer or director change
|
Feb 3, 2026 | Feb 3, 2026 |
| S-4/A | Filing | Jan 26, 2026 | — |
| S-4/A | Filing | Jan 23, 2026 | — |
| DEL AM | Filing | Dec 29, 2025 | — |
| S-4 | Registration for a merger or exchange | Dec 23, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 13, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 12, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 10, 2025 | — |
| 10-Q | Quarterly report | Oct 21, 2025 | Aug 31, 2025 |
| NT 10-Q | Filing | Oct 15, 2025 | Aug 31, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Oct 10, 2025 | — |
| 8-K |
Current report
Other events
|
Sep 24, 2025 | Sep 24, 2025 |
| DRS/A | Filing | Sep 23, 2025 | — |
| 8-K |
Current report
Other events
|
Aug 28, 2025 | Aug 28, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 13, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 8, 2025 | — |
| 8-K |
Current report
Other events
|
Aug 8, 2025 | Aug 7, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 7, 2025 | — |
| DRS/A | Filing | Aug 4, 2025 | — |
| 8-K/A |
Amended current report
Other events
|
Jul 22, 2025 | Jul 8, 2025 |
| 8-K |
Current report
Material agreement, Bylaw or fiscal year change, Shareholder vote results, Other events
|
Jul 14, 2025 | Jul 8, 2025 |
| DEFA14A | Additional proxy material | Jul 8, 2025 | — |
| 8-K |
Current report
Other events
|
Jul 8, 2025 | Jul 7, 2025 |
| 8-K |
Current report
Other events
|
Jul 3, 2025 | Jul 3, 2025 |
| 8-K |
Current report
Other events
|
Jul 1, 2025 | Jul 1, 2025 |
| 8-K |
Current report
Other events
|
Jun 27, 2025 | Jun 27, 2025 |
| 10-Q | Quarterly report | Jun 26, 2025 | May 31, 2025 |
| 8-K |
Current report
Other events
|
Jun 24, 2025 | Jun 23, 2025 |
| 8-K |
Current report
Other events
|
Jun 23, 2025 | Jun 23, 2025 |
| 8-K |
Current report
Other events
|
Jun 20, 2025 | Jun 20, 2025 |
| DEFA14A | Additional proxy material | Jun 20, 2025 | — |
| 8-K |
Current report
Other events
|
Jun 20, 2025 | Jun 20, 2025 |
| DEFA14A | Additional proxy material | Jun 20, 2025 | — |
| DRS | Filing | Jun 12, 2025 | — |
| DEFR14A | Filing | Jun 10, 2025 | — |
| DEF 14A | Proxy statement | Jun 10, 2025 | Jun 20, 2025 |
| 8-K |
Current report
Officer or director change
|
Jun 4, 2025 | Apr 29, 2025 |
| PRE 14A | Preliminary proxy statement | May 28, 2025 | May 28, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 13, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 12, 2025 | — |
| 425 | Filing | Apr 29, 2025 | — |
| 8-K |
Current report
Material agreement
|
Apr 29, 2025 | Apr 26, 2025 |
| 10-K/A | Amended annual report | Apr 11, 2025 | Nov 30, 2024 |
| 10-Q | Quarterly report | Apr 10, 2025 | Feb 28, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 14, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Feb 13, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 13, 2025 | — |
| 10-K | Annual report | Feb 7, 2025 | Nov 30, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 15, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Nov 14, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Nov 14, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Nov 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 12, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Nov 12, 2024 | — |
| 10-Q | Quarterly report | Sep 23, 2024 | Aug 31, 2024 |
| 10-Q | Quarterly report | Jun 28, 2024 | May 31, 2024 |
| SC 13G | Ownership over 5% (passive) | Jun 7, 2024 | — |
| SC 13D | Ownership over 5% (active) | Apr 26, 2024 | — |
| 4 | Insider transaction | Apr 26, 2024 | Apr 4, 2024 |
| 8-K/A |
Amended current report
Officer or director change, Other events
|
Apr 24, 2024 | Apr 22, 2024 |
| 8-K |
Current report
Officer or director change, Other events
|
Apr 24, 2024 | Apr 22, 2024 |
| 10-Q | Quarterly report | Apr 19, 2024 | Feb 29, 2024 |
| 8-K/A |
Amended current report
Other events
|
Apr 4, 2024 | Mar 22, 2024 |
| SC 13D | Ownership over 5% (active) | Apr 1, 2024 | — |
| 8-K |
Current report
Other events
|
Mar 28, 2024 | Mar 22, 2024 |
| SC 13G | Ownership over 5% (passive) | Mar 27, 2024 | — |
| 8-K |
Current report
Material agreement, Unregistered share sale, Bylaw or fiscal year change, Other events
|
Mar 26, 2024 | Mar 20, 2024 |
| 3 | Initial insider ownership | Mar 25, 2024 | Mar 20, 2024 |
| 3 | Initial insider ownership | Mar 25, 2024 | Mar 20, 2024 |
| 3 | Initial insider ownership | Mar 25, 2024 | Mar 20, 2024 |
| 3 | Initial insider ownership | Mar 25, 2024 | Mar 20, 2024 |
| 3 | Initial insider ownership | Mar 25, 2024 | Mar 20, 2024 |
| 424B4 | Prospectus | Mar 22, 2024 | — |
| CERT | Filing | Mar 21, 2024 | — |
| EFFECT | Filing | Mar 20, 2024 | — |
| S-1MEF | Filing | Mar 20, 2024 | — |
| 8-A12B | Filing | Mar 20, 2024 | — |
| CORRESP | Letter to the SEC | Mar 15, 2024 | — |
| CORRESP | Letter to the SEC | Mar 15, 2024 | — |
| S-1/A | Amended registration statement | Mar 8, 2024 | — |
| S-1/A | Amended registration statement | Feb 26, 2024 | — |
| CORRESP | Letter to the SEC | Feb 23, 2024 | — |
| UPLOAD | Letter from the SEC | Feb 21, 2024 | — |
| S-1 | Registration statement | Feb 5, 2024 | — |
| CORRESP | Letter to the SEC | Feb 2, 2024 | — |
| UPLOAD | Letter from the SEC | Jan 17, 2024 | — |
| DRS | Filing | Dec 21, 2023 | — |
Showing 117 filings. 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
- Biological Products, (No Diagnostic Substances) (SIC 2836)
- Listed as
- BKHA (Nasdaq), BKHAR (Nasdaq), BKHAU (Nasdaq)
- Fiscal year ends
- November 30
- Headquarters
- Danville, CA
- SEC filer status
- , Emerging growth company
- SEC CIK
- 2000775
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.