2 institutions reported holding $1.7M of QUARTZSEA ACQUISITION CORP (QSEAU) in SEC 13F filings for 2026-03-31. Largest institutional holders: Clear Street Group Inc. ($1.6M), UBS Group AG ($20,600). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Clear Street Group Inc. | $1.6M | 156,794 | Added |
| 2 | UBS Group AG | $20,600 | 2,000 | Hold |
Source: SEC Form 13F filings · as of 2026-03-31