Institutional Ownership
Quartzsea Acquisition Corp
CUSIP G7314B112UNIT 02/18/2030Q1 2026
13D / 13G Filings
7
Schedule 13D/13G on record
Beneficial Filers
4
Distinct reporting persons
Largest Stake
9.8%
Max % of class reported
Institutional Holders
2
13F filers (latest quarter)
Beneficial Owners — Schedule 13D / 13G
7 filings · latest Nov 13, 2025
| # | Filed | Reporting Person | Form | % of Class | Shares | Filing |
|---|---|---|---|---|---|---|
| 1 | Nov 13, 2025 | Mizuho Financial Group, Inc. | 13G | 5.6% | 641.8K | SEC |
| 2 | Aug 14, 2025 | Harraden Circle Investments, LLC | 13G/A | — | — | SEC |
| 3 | Aug 12, 2025 | Td Securities (USA) LLC | 13G/A | 2.5% | 280.1K | SEC |
| 4 | May 13, 2025 | Td Securities (USA) LLC | 13G | 7.4% | 612.5K | SEC |
| 5 | May 13, 2025 | Mizuho Financial Group, Inc. | 13G | 9.0% | 856.0K | SEC |
| 6 | Mar 25, 2025 | Feis Equities LLC | 13G | 9.8% | 814.8K | SEC |
| 7 | Mar 21, 2025 | Harraden Circle Investments, LLC | 13G | 8.7% | 993.8K | SEC |
Top Institutional Holders (13F)
Largest reported positions · latest quarter
| # | Fund | Shares | Value |
|---|---|---|---|
| 1 | Clear Street Group Inc. | 156.8K | $1.64M |
| 2 | Ubs Group AG | 2.0K | $20.6K |