2 institutions reported holding $577,792 of GERON CORP (GERNW) in SEC 13F filings for 2026-06-30. Largest institutional holders: SIMPLEX TRADING, LLC ($483,584), GROUP ONE TRADING LLC ($94,208). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | SIMPLEX TRADING, LLC | $483,584 | 377,800 | Trimmed |
| 2 | GROUP ONE TRADING LLC | $94,208 | 73,600 | Trimmed |
Source: SEC Form 13F filings · as of 2026-06-30