Quantumsphere Acquisition Corp SEC filings QUMSU
Quantumsphere Acquisition Corp has 44 filings in SEC EDGAR's recent list, going back to May 30, 2025. Its latest annual report, Form 10-K, was filed on Jun 15, 2026 for the period ended Mar 31, 2026. The latest quarterly report (Form 10-Q) was filed on Aug 14, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Oct 13, 2026 (material agreement, regulation fd disclosure). The company's fiscal year ends on March 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 425 | Filing | Oct 13, 2026 | — |
| 8-K |
Current report
Material agreement, Regulation FD disclosure
|
Oct 13, 2026 | Oct 9, 2026 |
| 8-K |
Current report
Agreement ended
|
Sep 2, 2026 | Sep 1, 2026 |
| 10-Q | Quarterly report | Aug 14, 2026 | Jun 30, 2026 |
| 10-K/A | Amended annual report | Jul 1, 2026 | Mar 31, 2026 |
| 10-K | Annual report | Jun 15, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Material agreement
|
Mar 11, 2026 | Mar 3, 2026 |
| 10-Q | Quarterly report | Feb 20, 2026 | Dec 31, 2025 |
| NT 10-Q | Filing | Feb 17, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Material agreement
|
Jan 23, 2026 | Jan 13, 2026 |
| 10-Q | Quarterly report | Nov 14, 2025 | Sep 30, 2025 |
| 8-K/A |
Amended current report
Other events
|
Oct 10, 2025 | Aug 7, 2025 |
| 8-K |
Current report
Material agreement, Regulation FD disclosure
|
Oct 6, 2025 | Oct 3, 2025 |
| 8-K |
Current report
Other events
|
Sep 29, 2025 | Sep 26, 2025 |
| 10-Q | Quarterly report | Sep 19, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Other events
|
Aug 14, 2025 | Aug 7, 2025 |
| 8-K |
Current report
Material agreement, Unregistered share sale, Officer or director change, Bylaw or fiscal year change, Other events
|
Aug 7, 2025 | Aug 5, 2025 |
| 424B4 | Prospectus | Aug 7, 2025 | — |
| S-1MEF | Filing | Aug 6, 2025 | — |
| CERT | Filing | Aug 6, 2025 | — |
| EFFECT | Filing | Aug 5, 2025 | — |
| 8-A12B | Filing | Aug 5, 2025 | — |
| CORRESP | Letter to the SEC | Aug 1, 2025 | — |
| CORRESP | Letter to the SEC | Aug 1, 2025 | — |
| S-1/A | Amended registration statement | Jul 30, 2025 | — |
| CORRESP | Letter to the SEC | Jul 29, 2025 | — |
| UPLOAD | Letter from the SEC | Jul 28, 2025 | — |
| S-1/A | Amended registration statement | Jul 24, 2025 | — |
| S-1/A | Amended registration statement | Jul 10, 2025 | — |
| CORRESP | Letter to the SEC | Jul 10, 2025 | — |
| UPLOAD | Letter from the SEC | Jun 24, 2025 | — |
| S-1 | Registration statement | May 30, 2025 | — |
Showing 32 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
- Blank Checks (SIC 6770)
- Listed as
- QUMS (Nasdaq), QUMSR (Nasdaq), QUMSU (Nasdaq)
- Fiscal year ends
- March 31
- Incorporated in
- Cayman Islands
- Headquarters
- New York, NY
- SEC filer status
- , Emerging growth company
- SEC CIK
- 2070900
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.