5 institutions reported holding $4.3M of M3-BRIGADE ACQUISITION VI CO (MBVIU) in SEC 13F filings for 2026-06-30. Largest institutional holders: SYQUANT CAPITAL SAS ($2.0M), Walleye Capital LLC ($1.0M), CITIGROUP INC ($933,300), Calamos Advisors LLC ($255,164), FNY Investment Advisers, LLC ($54,000). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | SYQUANT CAPITAL SAS | $2.0M | 200,000 | Hold |
| 2 | Walleye Capital LLC | $1.0M | 100,000 | Hold |
| 3 | CITIGROUP INC | $933,300 | 90,000 | Hold |
| 4 | Calamos Advisors LLC | $255,164 | 24,606 | Hold |
| 5 | FNY Investment Advisers, LLC | $54,000 | 5,288 | New |
Source: SEC Form 13F filings · as of 2026-06-30