3 institutions reported holding $12.3M of ALPEX ACQUISITION CORP (ALPXU) in SEC 13F filings for 2026-06-30. Largest institutional holders: MIZUHO SECURITIES USA LLC ($5.6M), RiverPark Advisors, LLC ($4.8M), Calamos Advisors LLC ($2.0M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | MIZUHO SECURITIES USA LLC | $5.6M | 558,604 | New |
| 2 | RiverPark Advisors, LLC | $4.8M | 475,000 | New |
| 3 | Calamos Advisors LLC | $2.0M | 200,000 | New |
Source: SEC Form 13F filings · as of 2026-06-30