Quartzsea AcquisitionQSEA
13F holders, Q2 2026 (June 30)At the end of Q2 2026, 21 institutions reported holding Quartzsea Acquisition Corp. (QSEA) in their 13F filings, down 5 from Q1 2026. 2 opened new positions and 7 sold out. The largest holders were Berkley W R Corp. ($11.5M), Mizuho Securities USA LLC ($10.4M) and Karpus Management, Inc. ($10.3M). 2 famous investors held it, including David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Quartzsea Acquisition Corp.
- CUSIP
- G7314B104
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2026 → Q2 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 2 | $1.5M |
| Exits | 7 | $9.1M |
All 13F filers, Q1 2026 → Q2 2026: 1,629,309 shares bought and 2,418,756 shares sold, net −789,447 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 21 holders
| Berkley W R Corp. | 0.56% | Add +169.8% | 1,094,190 | $11.5M |
| Mizuho Securities USA LLC | 0.17% | Add +46.6% | 993,296 | $10.4M |
| Karpus Management, Inc. | 0.29% | Reduce -56.8% | 974,765 | $10.3M |
| Westchester Capital Management, LLC | 0.32% | Add +66.8% | 611,605 | $6.4M |
| Rivernorth Capital Management, LLC | 0.26% | Reduce -0.0% | 499,664 | $5.3M |
| Wolverine Asset Management LLC | 0.27% | Reduce -17.4% | 495,488 | $5.2M |
| Polar Asset Management Partners Inc. | 0.10% | Add +7.1% | 375,000 | $3.9M |
| AQR Arbitrage LLC | 0.06% | Add +0.5% | 356,213 | $3.7M |
| RLH Capital LLC | 1.28% | Add +510.7% | 252,439 | $2.7M |
| Hudson Bay Capital Management LP | 0.01% | Add +0.1% | 175,159 | $1.8M |
| D. E. Shaw & Co. | 0.00% | Add +0.9% | 171,612 | $1.8M |
| Toronto Dominion Bank | 0.00% | Reduce -25.0% | 150,000 | $1.6M |
| Clear Street Group Inc. | 0.00% | New | 128,529 | $1.4M |
| Glazer Capital, LLC | 0.03% | Reduce -15.2% | 126,887 | $1.3M |
| Goldman Sachs Group Inc. | 0.00% | No change | 119,661 | $1.3M |
| Shaolin Capital Management LLC | 0.14% | Reduce -35.0% | 114,840 | $1.2M |
| Dakota Wealth Management | 0.01% | Reduce -28.4% | 49,760 | $523K |
| Warberg Asset Management LLC | 0.40% | Add +4.4% | 22,916 | $241K |
| BNP Paribas Financial Markets | 0.00% | No change | 16,987 | $179K |
| Citadel Advisors | 0.00% | New | 10,948 | $115K |
| Morgan Stanley | 0.00% | Reduce -14.1% | 61 | $642 |
"% of holder's portfolio" is QSEA's weight in each manager's 13F, not the share of Quartzsea Acquisition Corp. the manager owns.