Quantumsphere Acquisition Corp SEC filings QUMSR
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 |
|---|---|---|---|
| 424B4 | Prospectus | Aug 7, 2025 | — |
| S-1MEF | Filing | Aug 6, 2025 | — |
| S-1/A | Amended registration statement | Jul 30, 2025 | — |
| S-1/A | Amended registration statement | Jul 24, 2025 | — |
| S-1/A | Amended registration statement | Jul 10, 2025 | — |
| S-1 | Registration statement | May 30, 2025 | — |
Showing 6 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.
New to this? Read What Are SEC Filings? 10-K, 10-Q, 8-K and Other Forms Explained.
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
Other Blank Checks companies
- Drugs Made In America Acquisition II Corp. DMII
- EQV Ventures Acquisition Corp. II EVAC
- Bain Capital GSS Investment Corp. BCSS
- Cantor Equity Partners IV, Inc. CEPF
- Churchill Capital Corp XII CXII
- American Exceptionalism Acquisition Corp. A AEXA
- New America Acquisition I Corp. NWAX
- Ares Acquisition Corp III AAC
Source: SEC EDGAR filings. This is company-reported data, not investment advice.