Quartzsea AcquisitionQSEARPreferred / convertible
13F holders, Q4 2025 (December 31)15holders −1
1new positions
2sold out
1famous investor
$0.20avg. 13F price*
At the end of Q4 2025, 15 institutions reported holding Quartzsea Acquisition Corp. (QSEAR) in their 13F filings, down 1 from Q3 2025. 1 opened new positions and 2 sold out. The largest holders were Harraden Circle Investments, LLC ($510K), Shaolin Capital Management LLC ($115K) and Rivernorth Capital Management, LLC ($100K). One famous investor held it David E. Shaw ( of D. E. Shaw & Co.'s portfolio).
- Company
- Quartzsea Acquisition Corp.
- CUSIP
- G7314B120
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 1 | $27K |
| Exits | 2 | $40K |
All 13F filers, Q3 2025 → Q4 2025: 297,233 shares bought and 506,116 shares sold, net −208,883 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 15 holders
| Harraden Circle Investments, LLC | — | No change | 2,548,048 | $510K |
| Shaolin Capital Management LLC | — | Add +15.0% | 575,000 | $115K |
| Rivernorth Capital Management, LLC | — | Add +25.8% | 499,872 | $100K |
| Toronto Dominion Bank | — | Add +0.0% | 460,782 | $92K |
| Mangrove Partners Im, LLC | — | No change | 408,154 | $82K |
| Highbridge Capital Management LLC | — | No change | 400,000 | $80K |
| AQR Arbitrage LLC | — | Reduce -23.9% | 380,339 | $76K |
| Polar Asset Management Partners Inc. | — | No change | 350,000 | $70K |
| Linden Advisors LP | — | No change | 175,000 | $39K |
| Hudson Bay Capital Management LP | — | No change | 175,000 | $35K |
| D. E. Shaw & Co. | — | No change | 170,000 | $34K |
| Clear Street Group Inc. | — | No change | 137,000 | $27K |
| BNP Paribas Financial Markets | — | New | 119,661 | $27K |
| Wolverine Asset Management LLC | — | Reduce -2.1% | 118,431 | $24K |
| Alpine Global Management, LLC | — | Reduce -87.5% | 31,374 | $6K |
"% of holder's portfolio" is QSEAR's weight in each manager's 13F, not the share of Quartzsea Acquisition Corp. the manager owns.