3 institutions reported holding $5.7M of JACKSON ACQUISITION CO II (JACSU) in SEC 13F filings for 2026-06-30. Largest institutional holders: Calamos Advisors LLC ($5.6M), Clear Street Group Inc. ($122,526), GLAZER CAPITAL, LLC ($24,000). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Calamos Advisors LLC | $5.6M | 500,000 | Hold |
| 2 | Clear Street Group Inc. | $122,526 | 11,419 | Added |
| 3 | GLAZER CAPITAL, LLC | $24,000 | 2,154 | New |
Source: SEC Form 13F filings · as of 2026-06-30