2 institutions reported holding $321,166 of QUARTZSEA ACQUISITION CORP (QSEAU) in SEC 13F filings for 2026-06-30. Largest institutional holders: Clear Street Group Inc. ($299,826), UBS Group AG ($21,340). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Clear Street Group Inc. | $299,826 | 27,995 | Trimmed |
| 2 | UBS Group AG | $21,340 | 2,000 | Hold |
Source: SEC Form 13F filings · as of 2026-06-30