2 institutions reported holding $717,137 of GERON CORP (GERNW) in SEC 13F filings for 2026-03-31. Largest institutional holders: SIMPLEX TRADING, LLC ($579,163), GROUP ONE TRADING LLC ($137,974). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | SIMPLEX TRADING, LLC | $579,163 | 388,700 | Trimmed |
| 2 | GROUP ONE TRADING LLC | $137,974 | 92,600 | Trimmed |
Source: SEC Form 13F filings · as of 2026-03-31