4 institutions reported holding $1.6M of GEVO INC (GEVNW) in SEC 13F filings for 2026-06-30. Largest institutional holders: SIMPLEX TRADING, LLC ($959,250), GROUP ONE TRADING LLC ($451,650), IMC-Chicago, LLC ($139,800), SABBY MANAGEMENT, LLC ($0). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | SIMPLEX TRADING, LLC | $959,250 | 639,500 | Trimmed |
| 2 | GROUP ONE TRADING LLC | $451,650 | 301,100 | Added |
| 3 | IMC-Chicago, LLC | $139,800 | 93,200 | Added |
| 4 | SABBY MANAGEMENT, LLC | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30