Quartzsea Acquisition Corp
QSEA- Exchange
- Nasdaq
- Industry
- Blank Checks
- SEC CIK
- 0002047455
No open-market purchases or sales by Quartzsea Acquisition Corp insiders were filed in the last 90 days; 21 institutions reported holding it in 13F filings for Q2 2026, worth $70.9M in total; no superinvestor holds it.
Q3 2025 vs. Q2 2025
How the institutions holding Quartzsea Acquisition Corp changed between Q2 2025 and Q3 2025.
All holders in Q3 2025All holders in Q2 2025
| Measure | Q2 2025 | Of which not filed for Q3 2025 | Q3 2025 | Change |
|---|---|---|---|---|
| Holders | 24 | 1 | 25 | +2 |
| Shares | 6.94M | 31.0K | 7.47M | +558.7K (+8.1%) |
| Value | $69.7M | $311.2K | $74.3M | +$4.95M (+7.1%) |
1 institution that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so the changes leave them out.
New holders (3)
Institutions that held Quartzsea Acquisition Corp at the end of Q3 2025 but not at the end of Q2 2025.
| Institution | Shares | Value | % of portfolio |
|---|---|---|---|
| Rivernorth Capital Management, LLC | 397,500 | $4.03M | 0.23% |
| Clear Street Group Inc. | 24,693 | $250.1K | 0.00% |
| Wellspring Financial Advisors, LLC | 17,700 | $179.3K | 0.02% |
Sold out (1)
Institutions that held Quartzsea Acquisition Corp at the end of Q2 2025 and filed for Q3 2025 without it.
| Institution | Shares, Q2 2025 | Value, Q2 2025 |
|---|---|---|
| Virtu Financial LLC | 95,248 | $957.0K |
Not filed for Q3 2025 yet (1)
Institutions that held Quartzsea Acquisition Corp at the end of Q2 2025 and haven't filed a 13F for Q3 2025. Not filing isn't selling, so they aren't counted as sold out.
| Institution | Shares, Q2 2025 | Value, Q2 2025 |
|---|---|---|
| Clear Street LLC | 30,979 | $311.2K |