Who owns Quartzsea Acquisition Corp?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of QSEA from SEC Form 13F filings across 21 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 21 institutions disclosed 6.4M shares of Quartzsea Acquisition Corp worth $67.5M — about 77.6% of shares outstanding; the largest disclosed holder is BERKLEY W R CORP. Source: SEC Form 13F filings, parsed by EvidInvest.
21
13F holders
$67.5M
value, 2026 filers
77.6%
of shares outstanding (6.4M sh)
2
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of QSEA's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | BERKLEY W R CORP | 1.1M | $11.5M | 0.5% | 13.2% | +169.8% |
| 2 | Karpus Management, Inc. | 974,765 | $10.3M | 0.3% | 11.8% | -56.8% |
| 3 | MIZUHO SECURITIES USA LLC | 677,754 | $6.9M | 0.2% | 8.2% | 0.0% |
| 4 | Westchester Capital Management, LLC | 611,605 | $6.4M | 0.3% | 7.4% | +66.8% |
| 5 | RIVERNORTH CAPITAL MANAGEMENT, LLC | 499,664 | $5.3M | 0.3% | 6% | 0.0% |
| 6 | WOLVERINE ASSET MANAGEMENT LLC | 495,488 | $5.2M | 0.0% | 6% | -17.4% |
| 7 | Polar Asset Management Partners Inc. | 375,000 | $3.9M | 0.1% | 4.5% | +7.1% |
| 8 | AQR Arbitrage LLC | 356,213 | $3.7M | 0.1% | 4.3% | +0.5% |
| 9 | RLH Capital LLC | 252,439 | $2.7M | 1.3% | 3% | +510.7% |
| 10 | Hudson Bay Capital Management LP | 175,159 | $1.8M | 0.0% | 2.1% | +0.1% |
| 11 | D. E. Shaw & Co., Inc. | 171,612 | $1.8M | 0.0% | 2.1% | +0.9% |
| 12 | TORONTO DOMINION BANK | 150,000 | $1.6M | 0.0% | 1.8% | -25.0% |
| 13 | Clear Street Group Inc.NEW | 128,529 | $1.4M | 0.0% | 1.6% | new |
| 14 | GLAZER CAPITAL, LLC | 126,887 | $1.3M | 0.0% | 1.5% | -15.2% |
| 15 | GOLDMAN SACHS GROUP INC | 119,661 | $1.3M | 0.0% | 1.4% | 0.0% |
| 16 | Shaolin Capital Management LLC | 114,840 | $1.2M | 0.1% | 1.4% | -35.0% |
| 17 | Dakota Wealth Management | 49,760 | $523,476 | 0.0% | 0.6% | -28.4% |
| 18 | Warberg Asset Management LLC | 22,916 | $241,076 | 0.0% | 0.3% | +4.4% |
| 19 | BNP PARIBAS FINANCIAL MARKETS | 16,987 | $178,703 | 0.0% | 0.2% | 0.0% |
| 20 | CITADEL ADVISORS LLCNEW | 10,948 | $115,173 | 0.0% | 0.1% | new |
| 21 | MORGAN STANLEY | 61 | $642 | 0.0% | 0% | -14.1% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.