Quartzsea AcquisitionQSEA
13F holders, Q3 2025 (September 30)25holders +1
2new positions
1sold out
1famous investor
$9.95avg. 13F price*
At the end of Q3 2025, 25 institutions reported holding Quartzsea Acquisition Corp. (QSEA) in their 13F filings, up 1 from Q2 2025. 2 opened new positions and 1 sold out. The largest holders were Karpus Management, Inc. ($23.1M), Mizuho Securities USA LLC ($6.4M) and Wolverine Asset Management LLC ($5.9M). One famous investor held it David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio).
- Company
- Quartzsea Acquisition Corp.
- CUSIP
- G7314B104
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 2 | $4.2M |
| Exits | 1 | $957K |
All 13F filers, Q2 2025 → Q3 2025: 800,579 shares bought and 266,597 shares sold, net +533,982 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 25 holders
| Karpus Management, Inc. | 0.73% | Reduce -1.1% | 2,276,380 | $23.1M |
| Mizuho Securities USA LLC | 0.13% | Add +40.4% | 641,777 | $6.4M |
| Wolverine Asset Management LLC | 0.42% | Add +9.6% | 584,505 | $5.9M |
| Mangrove Partners Im, LLC | 0.34% | No change | 408,154 | $4.1M |
| Rivernorth Capital Management, LLC | 0.23% | New | 397,500 | $4.0M |
| AQR Arbitrage LLC | 0.13% | Reduce -2.0% | 369,960 | $3.8M |
| Westchester Capital Management, LLC | 0.19% | No change | 366,605 | $3.7M |
| Polar Asset Management Partners Inc. | 0.10% | No change | 350,000 | $3.5M |
| Berkley W R Corp. | 0.19% | Add +93.4% | 288,603 | $2.9M |
| Toronto Dominion Bank | 0.01% | Reduce -4.7% | 266,975 | $2.7M |
| Two Sigma Investments, LP | 0.00% | Reduce -29.4% | 184,128 | $1.9M |
| Linden Advisors LP | 0.17% | No change | 175,000 | $1.8M |
| Hudson Bay Capital Management LP | 0.01% | No change | 175,000 | $1.8M |
| Shaolin Capital Management LLC | 0.34% | Reduce -21.8% | 175,000 | $1.8M |
| D. E. Shaw & Co. | 0.00% | No change | 170,012 | $1.7M |
| Glazer Capital, LLC | 0.06% | Reduce -0.8% | 163,753 | $1.7M |
| Goldman Sachs Group Inc. | 0.00% | No change | 119,661 | $1.2M |
| Dakota Wealth Management | 0.01% | No change | 69,500 | $704K |
| Logan Stone Capital, LLC | 0.23% | No change | 50,053 | $507K |
| Radcliffe Capital Management, L.P. | 0.06% | No change | 26,553 | $269K |
| Clear Street Group Inc. | 0.00% | — | 24,693 | $250K |
| Warberg Asset Management LLC | 0.87% | No change | 24,000 | $243K |
| Wellspring Financial Advisors, LLC | 0.02% | New | 17,700 | $179K |
| Crossingbridge Advisors, LLC | 0.17% | Add +7.8% | 140,189 | $140K |
| Morgan Stanley | 0.00% | Add +19.2% | 31 | $314 |
"% of holder's portfolio" is QSEA's weight in each manager's 13F, not the share of Quartzsea Acquisition Corp. the manager owns.