Quartzsea Acquisition Corp
QSEAR- 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; 14 institutions reported holding it in 13F filings for Q2 2026, worth $1.40M in total; no superinvestor holds it.
13F holders, Q4 2025
Institutional positions in Quartzsea Acquisition Corp as of Dec 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 16
- 0 vs. Q3 2025
- Shares held
- 6.55M
- −208.9K (−3.1%) vs. Q3 2025
- Total value
- $1.33M
- −$563.0K (−29.7%) vs. Q3 2025
- New holders
- 1
- 3 more added
- Sold out
- 1
- 3 more reduced
Compare with Q3 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting QSEAR on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 14 | $1.40M |
| Q1 2026 | 16 | $1.04M |
| Q4 2025 | 16 | $1.33M |
| Q3 2025 | 16 | $1.90M |
| Q2 2025 | 15 | $1.89M |
| Q1 2025 | 0 | $0 |
| Q4 2024 | 0 | $0 |
| Q3 2024 | 0 | $0 |
| Q2 2024 | 0 | $0 |
| Q1 2024 | 0 | $0 |
| Q4 2023 | 0 | $0 |
| Q3 2023 | 0 | $0 |
| Q2 2023 | 0 | $0 |
| Q1 2023 | 0 | $0 |
| Q4 2022 | 0 | $0 |
| Q3 2022 | 0 | $0 |
| Q2 2022 | 0 | $0 |
| Q1 2022 | 0 | $0 |
| Q4 2021 | 0 | $0 |
| Q3 2021 | 0 | $0 |
| Q2 2021 | 0 | $0 |
| Q1 2021 | 0 | $0 |
Institutions, Q4 2025
Shares, value and share of portfolio for each institution holding Quartzsea Acquisition Corp; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Alpine Global Management, LLC | 31,374 | $6.28K | 0.00% | −218,626−87.5% | Reduced |
| Glazer Capital, LLC | – | $16.0K | 0.00% | – | – |
| Wolverine Asset Management LLC | 118,431 | $23.7K | 0.00% | −2,575−2.1% | Reduced |
| BNP Paribas Arbitrage, SA | 119,661 | $26.9K | 0.00% | +119,661 | New |
| Clear Street Group Inc. | 137,000 | $27.4K | 0.00% | 00.0% | Unchanged |
| D. E. Shaw & Co., Inc. | 170,000 | $34.0K | 0.00% | 00.0% | Unchanged |
| Hudson Bay Capital Management LP | 175,000 | $35.0K | 0.00% | 00.0% | Unchanged |
| Linden Advisors LP | 175,000 | $39.4K | 0.00% | 00.0% | Unchanged |
| Polar Asset Management Partners Inc. | 350,000 | $70.1K | 0.00% | 00.0% | Unchanged |
| CNH Partners LLC | 380,339 | $76.1K | 0.00% | −119,661−23.9% | Reduced |
| Highbridge Capital Management LLC | 400,000 | $80.1K | 0.00% | 00.0% | Unchanged |
| Mangrove Partners | 408,154 | $81.7K | 0.01% | 00.0% | Unchanged |
| Toronto Dominion Bank | 460,782 | $92.2K | 0.00% | +2000.0% | Added |
| Rivernorth Capital Management, LLC | 499,872 | $100.0K | 0.00% | +102,372+25.8% | Added |
| Shaolin Capital Management LLC | 575,000 | $115.1K | 0.00% | +75,000+15.0% | Added |
| Harraden Circle Investments, LLC | 2,548,048 | $510.1K | 0.09% | 00.0% | Unchanged |
| Mizuho Securities USA LLC | 0 | $0 | 0.00% | −65,254−100.0% | Sold out |