Quartzsea Acquisition Corp SEC filings QSEA
Quartzsea Acquisition Corp has 77 filings in SEC EDGAR's recent list, going back to Dec 23, 2024. Its latest annual report, Form 10-K, was filed on Mar 16, 2026 for the period ended Nov 30, 2025. The latest quarterly report (Form 10-Q) was filed on Oct 9, 2026, covering the quarter ended Aug 31, 2026. The most recent current report (Form 8-K) was filed on Oct 20, 2026 (other events). The company's fiscal year ends on November 30.
| Form | Description | Filed | Period |
|---|---|---|---|
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 13, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 6, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 16, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jun 8, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jun 5, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Nov 13, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Oct 10, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 12, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Jun 6, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 27, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | May 13, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | May 13, 2025 | — |
| SCHEDULE 13D | Ownership over 5% (active) | Apr 3, 2025 | — |
| 3 | Initial insider ownership | Apr 3, 2025 | Mar 14, 2025 |
| 3 | Initial insider ownership | Mar 28, 2025 | Mar 14, 2025 |
| 3 | Initial insider ownership | Mar 28, 2025 | Mar 14, 2025 |
| 3 | Initial insider ownership | Mar 28, 2025 | Mar 14, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Mar 25, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Mar 21, 2025 | — |
Showing 21 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
- QSEA (Nasdaq), QSEAR (Nasdaq), QSEAU (Nasdaq)
- Fiscal year ends
- November 30
- Incorporated in
- Cayman Islands
- Headquarters
- New York, NY
- SEC filer status
- , Emerging growth company
- SEC CIK
- 2047455
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.