Quartzsea Acquisition Corp
QSEA- 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; 21 institutions reported holding it in 13F filings for Q2 2026, worth $70.9M in total; no superinvestor holds it.
13F holders, Q2 2025
Institutional positions in Quartzsea Acquisition Corp as of Jun 30, 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
- 24
- +24 vs. Q1 2025
- Shares held
- 6.94M
- +6.94M vs. Q1 2025
- Total value
- $69.7M
- +$69.7M vs. Q1 2025
- New holders
- 24
- 0 more added
- Sold out
- 0
- 0 more reduced
Compare with Q1 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting QSEA 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 | 21 | $70.9M |
| Q1 2026 | 26 | $78.0M |
| Q4 2025 | 25 | $75.4M |
| Q3 2025 | 25 | $74.3M |
| Q2 2025 | 24 | $69.7M |
| 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, Q2 2025
Shares, value and share of portfolio for each institution holding Quartzsea Acquisition Corp; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Karpus Management, Inc. | 2,300,475 | $23.1M | 0.75% | +2,300,475 | New |
| Wolverine Asset Management LLC | 533,325 | $5.36M | 0.09% | +533,325 | New |
| Mizuho Securities USA LLC | 457,137 | $4.56M | 0.10% | +457,137 | New |
| Mangrove Partners | 408,154 | $4.10M | 0.44% | +408,154 | New |
| CNH Partners LLC | 377,339 | $3.79M | 0.09% | +377,339 | New |
| Westchester Capital Management, LLC | 366,605 | $3.68M | 0.22% | +366,605 | New |
| Polar Asset Management Partners Inc. | 350,000 | $3.52M | 0.09% | +350,000 | New |
| Toronto Dominion Bank | 280,095 | $2.81M | 0.01% | +280,095 | New |
| Two Sigma Investments, LP | 260,999 | $2.62M | 0.00% | +260,999 | New |
| Shaolin Capital Management LLC | 223,637 | $2.25M | 0.10% | +223,637 | New |
| Linden Advisors LP | 175,000 | $1.76M | 0.01% | +175,000 | New |
| Hudson Bay Capital Management LP | 175,000 | $1.76M | 0.01% | +175,000 | New |
| D. E. Shaw & Co., Inc. | 170,012 | $1.71M | 0.00% | +170,012 | New |
| Glazer Capital, LLC | 165,000 | $1.66M | 0.06% | +165,000 | New |
| Berkley W R Corp | 149,238 | $1.50M | 0.09% | +149,238 | New |
| Crossingbridge Advisors, LLC | 130,000 | $1.31M | 1.15% | +130,000 | New |
| Goldman Sachs Group Inc | 119,661 | $1.20M | 0.00% | +119,661 | New |
| Virtu Financial LLC | 95,248 | $957.0K | 0.05% | +95,248 | New |
| Dakota Wealth Management | 69,500 | $698.1K | 0.01% | +69,500 | New |
| Logan Stone Capital, LLC | 50,053 | $502.8K | 0.24% | +50,053 | New |
| Clear Street LLC | 30,979 | $311.2K | 0.00% | +30,979 | New |
| Radcliffe Capital Management, L.P. | 26,553 | $266.7K | 0.02% | +26,553 | New |
| Warberg Asset Management LLC | 24,000 | $241.1K | 0.06% | +24,000 | New |
| Morgan Stanley | 26 | $261 | 0.00% | +26 | New |