Quartzsea Acquisition Corp
QSEAU- 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; 2 institutions reported holding it in 13F filings for Q2 2026, worth $321.2K in total; no superinvestor holds it.
13F holders, Q1 2025
Institutional positions in Quartzsea Acquisition Corp as of Mar 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
- 20
- +20 vs. Q4 2024
- Shares held
- 6.08M
- +6.08M vs. Q4 2024
- Total value
- $61.4M
- +$61.4M vs. Q4 2024
- New holders
- 20
- 0 more added
- Sold out
- 0
- 0 more reduced
Compare with Q4 2024: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting QSEAU 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 | 2 | $321.2K |
| Q1 2026 | 2 | $1.67M |
| Q4 2025 | 2 | $1.65M |
| Q3 2025 | 3 | $2.68M |
| Q2 2025 | 3 | $6.68M |
| Q1 2025 | 20 | $61.4M |
| 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, Q1 2025
Shares, value and share of portfolio for each institution holding Quartzsea Acquisition Corp; share changes are against Q4 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Harraden Circle Investments, LLC | 1,075,789 | $10.9M | 4.94% | +1,075,789 | New |
| Mizuho Securities USA LLC | 856,000 | $8.60M | 0.19% | +856,000 | New |
| CNH Partners LLC | 500,000 | $5.05M | 0.12% | +500,000 | New |
| Rivernorth Capital Management, LLC | 500,000 | $5.05M | 0.27% | +500,000 | New |
| Mangrove Partners | 408,154 | $4.12M | 0.46% | +408,154 | New |
| Polar Asset Management Partners Inc. | 350,000 | $3.54M | 0.12% | +350,000 | New |
| Wolverine Asset Management LLC | 305,000 | $3.08M | 0.06% | +305,000 | New |
| Glazer Capital, LLC | 294,067 | $2.97M | 0.14% | +294,067 | New |
| Two Sigma Investments, LP | 260,999 | $2.64M | 0.01% | +260,999 | New |
| Shaolin Capital Management LLC | 250,000 | $2.52M | 0.10% | +250,000 | New |
| Clear Street LLC | 200,000 | $2.02M | 0.04% | +200,000 | New |
| Crossingbridge Advisors, LLC | 200,000 | $2.02M | 1.08% | +200,000 | New |
| Linden Advisors LP | 175,000 | $1.77M | 0.01% | +175,000 | New |
| Hudson Bay Capital Management LP | 175,000 | $1.77M | 0.01% | +175,000 | New |
| D. E. Shaw & Co., Inc. | 170,000 | $1.72M | 0.00% | +170,000 | New |
| Quarry LP | 150,000 | $1.51M | 0.39% | +150,000 | New |
| Berkley W R Corp | 148,740 | $1.50M | 0.11% | +148,740 | New |
| Schonfeld Strategic Advisors LLC | 40,000 | $404.0K | 0.00% | +40,000 | New |
| Warberg Asset Management LLC | 24,000 | $242.4K | 0.07% | +24,000 | New |
| UBS Group AG | 1,999 | $20.2K | 0.00% | +1,999 | New |