Company filings profile · CIK 0002047455
Quartzsea Acquisition Corp — SEC filings & insider activity.
Real, source-linked SEC EDGAR activity for Quartzsea Acquisition Corp (QSEA): 9 filings in the last 90 days vs 15 in the prior 90 (filing-velocity cooling ↓ · 0.6×). Latest material 8-K events, insider Form-4 transactions, and periodic reports — monitored for change.
✔ Verified against the public SEC EDGAR filing record as of Sep 22, 2026. Source-linked, daily-refreshed.
Material 8-K events — Quartzsea Acquisition Corp
8-K disclosures decoded by item code (the material events: agreements, results, control/management changes, impairments, restatements).
| Filed | Event | |
|---|---|---|
| Sep 21, 2026 | Other Events | ↗ |
| Aug 25, 2026 | Delisting / Listing-Rule Failure | ↗ |
| Jun 24, 2026 | Item 5.07 | ↗ |
| Jun 18, 2026 | Other Events | ↗ |
| Jun 16, 2026 | Other Events | ↗ |
| May 15, 2026 | Entry into a Material Agreement; Regulation FD Disclosure; Financial Statements and Exhibits | ↗ |
| Mar 18, 2026 | Entry into a Material Agreement; Termination of a Material Agreement; Financial Statements and Exhibits | ↗ |
| Mar 11, 2026 | Entry into a Material Agreement; Financial Statements and Exhibits | ↗ |
| Jun 6, 2025 | Entry into a Material Agreement; Financial Statements and Exhibits | ↗ |
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Recent filings
| Filed | Form | Detail | |
|---|---|---|---|
| Sep 21, 2026 | 8-K | Other Events | ↗ |
| Sep 17, 2026 | PRE 14A | PRE 14A | ↗ |
| Aug 25, 2026 | 8-K | Delisting / Listing-Rule Failure | ↗ |
| Aug 14, 2026 | SCHEDULE 13G/A | ↗ | |
| Aug 13, 2026 | SCHEDULE 13G/A | ↗ | |
| Aug 6, 2026 | SCHEDULE 13G | ↗ | |
| Jul 16, 2026 | SCHEDULE 13G/A | ↗ | |
| Jul 14, 2026 | 10-Q | 10-Q | ↗ |
| Jun 24, 2026 | 8-K | Item 5.07 | ↗ |
| Jun 18, 2026 | 8-K | Other Events | ↗ |
| Jun 17, 2026 | DEFR14A | DEFR14A | ↗ |
| Jun 16, 2026 | 8-K/A | Other Events | ↗ |
| Jun 16, 2026 | 8-K | Other Events | ↗ |
| Jun 8, 2026 | SCHEDULE 13G/A | ↗ | |
| Jun 5, 2026 | SCHEDULE 13G/A | ↗ | |
| Jun 1, 2026 | DEFR14A | DEFR14A | ↗ |
| May 29, 2026 | DEFR14A | DEFR14A | ↗ |
| May 29, 2026 | DEF 14A | DEF 14A | ↗ |
| May 15, 2026 | PRE 14A | PRE 14A | ↗ |
| May 15, 2026 | 425 | 425 | ↗ |
| May 15, 2026 | 8-K | Entry into a Material Agreement; Regulation FD Disclosure; Financial Statements and Exhibits | ↗ |
| Apr 23, 2026 | 10-Q | 10-Q | ↗ |
| Apr 14, 2026 | NT 10-Q | NT 10-Q | ↗ |
| Apr 9, 2026 | 10-K/A | 10-K/A | ↗ |
| Mar 18, 2026 | 8-K | Entry into a Material Agreement; Termination of a Material Agreement; Financial Statements and Exhibits | ↗ |
| Mar 16, 2026 | 10-K | 10-K | ↗ |
| Mar 11, 2026 | 8-K | Entry into a Material Agreement; Financial Statements and Exhibits | ↗ |
| Mar 2, 2026 | NT 10-K | NT 10-K | ↗ |
| Nov 13, 2025 | SCHEDULE 13G | ↗ | |
| Oct 20, 2025 | 10-Q | 10-Q | ↗ |
| Oct 15, 2025 | NT 10-Q/A | NT 10-Q | ↗ |
| Oct 15, 2025 | NT 10-Q | NT 10-Q | ↗ |
| Oct 10, 2025 | SCHEDULE 13G | ↗ | |
| Aug 14, 2025 | SCHEDULE 13G/A | ↗ | |
| Aug 12, 2025 | SCHEDULE 13G/A | ↗ | |
| Jul 10, 2025 | 10-Q | 10-Q | ↗ |
| Jun 6, 2025 | 8-K | Entry into a Material Agreement; Financial Statements and Exhibits | ↗ |
| Jun 6, 2025 | SCHEDULE 13G | ↗ | |
| May 27, 2025 | SCHEDULE 13G/A | ↗ | |
| May 13, 2025 | SCHEDULE 13G | ↗ |