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; 15 institutions reported holding it in 13F filings for Q2 2026, worth $1.40M in total; no superinvestor holds it.
13F holders, Q2 2026
Institutional positions in Quartzsea Acquisition Corp as of Jun 30, 2026. 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
- 15
- −1 vs. Q1 2026
- Shares held
- 6.39M
- −170.3K (−2.6%) vs. Q1 2026
- Total value
- $1.40M
- +$359.8K (+34.6%) vs. Q1 2026
- New holders
- 0
- 3 more added
- Sold out
- 1
- 4 more reduced
Compare with Q1 2026: 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 | 15 | $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, Q2 2026
Shares, value and share of portfolio for each institution holding Quartzsea Acquisition Corp; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Harraden Circle Investments, LLC | 2,548,048 | $560.6K | 0.07% | 00.0% | Unchanged |
| Shaolin Capital Management LLC | 575,393 | $126.6K | 0.01% | +1,886+0.3% | Added |
| Rivernorth Capital Management, LLC | 499,872 | $109.3K | 0.01% | 00.0% | Unchanged |
| Mangrove Partners | 408,154 | $89.8K | 0.01% | 00.0% | Unchanged |
| Highbridge Capital Management LLC | 382,957 | $84.3K | 0.00% | −17,043−4.3% | Reduced |
| CNH Partners LLC | 370,460 | $81.5K | 0.00% | +500+0.1% | Added |
| Polar Asset Management Partners Inc. | 350,000 | $77.0K | 0.00% | 00.0% | Unchanged |
| Toronto Dominion Bank | 336,000 | $73.9K | 0.00% | −89,851−21.1% | Reduced |
| Clear Street Group Inc. | 268,292 | $59.0K | 0.00% | +131,292+95.8% | Added |
| D. E. Shaw & Co., Inc. | 170,000 | $37.4K | 0.00% | 00.0% | Unchanged |
| Linden Advisors LP | 175,000 | $33.1K | 0.00% | 00.0% | Unchanged |
| BNP Paribas Arbitrage, SA | 119,661 | $26.3K | 0.00% | 00.0% | Unchanged |
| Hudson Bay Capital Management LP | 100,000 | $22.0K | 0.00% | −75,000−42.9% | Reduced |
| Wolverine Asset Management LLC | 74,112 | $16.3K | 0.00% | −42,758−36.6% | Reduced |
| Mizuho Securities USA LLC | 10,235 | $2.05K | 0.00% | 00.0% | Unchanged |
| Glazer Capital, LLC | 0 | $0 | 0.00% | −79,338−100.0% | Sold out |