Quartzsea AcquisitionQSEARPreferred / convertible
13F holders, Q3 2025 (September 30)16holders +1
1new positions
0sold out
1famous investor
$0.28avg. 13F price*
At the end of Q3 2025, 16 institutions reported holding Quartzsea Acquisition Corp. (QSEAR) in their 13F filings, up 1 from Q2 2025. 1 opened new positions and 0 sold out. The largest holders were Harraden Circle Investments, LLC ($732K), AQR Arbitrage LLC ($144K) and Shaolin Capital Management LLC ($144K). 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 Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 1 | $93K |
| Exits | 0 | $0 |
All 13F filers, Q2 2025 → Q3 2025: 397,500 shares bought and 503,954 shares sold, net −106,454 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 16 holders
| Harraden Circle Investments, LLC | — | No change | 2,548,048 | $732K |
| AQR Arbitrage LLC | — | No change | 500,000 | $144K |
| Shaolin Capital Management LLC | — | No change | 500,000 | $144K |
| Toronto Dominion Bank | — | Reduce -21.5% | 460,582 | $132K |
| Mangrove Partners Im, LLC | — | No change | 408,154 | $117K |
| Highbridge Capital Management LLC | — | No change | 400,000 | $115K |
| Polar Asset Management Partners Inc. | — | No change | 350,000 | $101K |
| Rivernorth Capital Management, LLC | — | New | 397,500 | $93K |
| Alpine Global Management, LLC | — | No change | 250,000 | $59K |
| Hudson Bay Capital Management LP | — | No change | 175,000 | $50K |
| D. E. Shaw & Co. | — | No change | 170,000 | $49K |
| Linden Advisors LP | — | No change | 175,000 | $48K |
| Clear Street Group Inc. | — | — | 137,000 | $39K |
| Wolverine Asset Management LLC | — | Reduce -60.3% | 121,006 | $35K |
| Glazer Capital, LLC | — | Reduce -66.0% | 100,000 | $24K |
| Mizuho Securities USA LLC | — | No change | 65,254 | $16K |
"% of holder's portfolio" is QSEAR's weight in each manager's 13F, not the share of Quartzsea Acquisition Corp. the manager owns.