4 institutions reported holding $15.8M of GBL AERO & DEF (GCAD) in SEC 13F filings for 2026-03-31. Largest institutional holders: GAMCO INVESTORS, INC. ET AL ($8.8M), GABELLI FUNDS LLC ($6.6M), JANE STREET GROUP, LLC ($419,312), Parallel Advisors, LLC ($29,837). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | GAMCO INVESTORS, INC. ET AL | $8.8M | 176,429 | Added |
| 2 | GABELLI FUNDS LLC | $6.6M | 132,500 | Added |
| 3 | JANE STREET GROUP, LLC | $419,312 | 8,432 | New |
| 4 | Parallel Advisors, LLC | $29,837 | 600 | New |
Source: SEC Form 13F filings · as of 2026-03-31