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, 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
- 25
- 0 vs. Q3 2025
- Shares held
- 7.50M
- +35.7K (+0.5%) vs. Q3 2025
- Total value
- $75.4M
- +$1.08M (+1.5%) vs. Q3 2025
- New holders
- 0
- 6 more added
- Sold out
- 0
- 4 more reduced
Compare with Q3 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, 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 |
|---|---|---|---|---|---|
| Karpus Management, Inc. | 2,263,880 | $23.2M | 0.71% | −12,500−0.5% | Reduced |
| Mizuho Securities USA LLC | 676,753 | $6.84M | 0.11% | +34,976+5.4% | Added |
| Wolverine Asset Management LLC | 602,513 | $6.16M | 0.09% | +18,008+3.1% | Added |
| Rivernorth Capital Management, LLC | 499,756 | $5.11M | 0.24% | +102,256+25.7% | Added |
| Mangrove Partners | 408,154 | $4.18M | 0.34% | 00.0% | Unchanged |
| CNH Partners LLC | 369,960 | $3.79M | 0.08% | 00.0% | Unchanged |
| Westchester Capital Management, LLC | 366,605 | $3.76M | 0.18% | 00.0% | Unchanged |
| Polar Asset Management Partners Inc. | 350,000 | $3.58M | 0.07% | 00.0% | Unchanged |
| Berkley W R Corp | 317,686 | $3.25M | 0.18% | +29,083+10.1% | Added |
| Toronto Dominion Bank | 241,975 | $2.48M | 0.00% | −25,000−9.4% | Reduced |
| Shaolin Capital Management LLC | 176,586 | $1.81M | 0.07% | +1,586+0.9% | Added |
| Linden Advisors LP | 175,000 | $1.79M | 0.01% | 00.0% | Unchanged |
| Hudson Bay Capital Management LP | 175,000 | $1.79M | 0.01% | 00.0% | Unchanged |
| D. E. Shaw & Co., Inc. | 170,012 | $1.74M | 0.00% | 00.0% | Unchanged |
| Glazer Capital, LLC | 149,926 | $1.53M | 0.04% | −13,827−8.4% | Reduced |
| Goldman Sachs Group Inc | 119,661 | $1.22M | 0.00% | 00.0% | Unchanged |
| Two Sigma Investments, LP | 85,270 | $872.3K | 0.00% | −98,858−53.7% | Reduced |
| Dakota Wealth Management | 69,500 | $711.0K | 0.01% | 00.0% | Unchanged |
| Logan Stone Capital, LLC | 50,053 | $512.0K | 0.13% | 00.0% | Unchanged |
| Radcliffe Capital Management, L.P. | 26,553 | $271.6K | 0.01% | 00.0% | Unchanged |
| Clear Street Group Inc. | 24,693 | $252.6K | 0.00% | 00.0% | Unchanged |
| Warberg Asset Management LLC | 24,000 | $245.5K | 0.07% | 00.0% | Unchanged |
| Wellspring Financial Advisors, LLC | 17,700 | $181.1K | 0.01% | 00.0% | Unchanged |
| Crossingbridge Advisors, LLC | 140,189 | $140.2K | 0.04% | 00.0% | Unchanged |
| Morgan Stanley | 38 | $389 | 0.00% | +7+22.6% | Added |