🕵️ Geron Corp ($GERN)
SEC insider & ownership activity, last 12 months · CIK 886744 · every row links its SEC filing
Over the last 12 months insiders sold $19K with no open-market buying against it. Robertson Michelle sold $19K in discretionary trades (Feb). No red-flag 8-Ks in the window.
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Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
0 buyers, $0 (0 lots) · 1 seller, $19K (1 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Robertson Michelle | 0 | – | 1 | $19K | Feb 18, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| RA Capital Management, L.P. | 9.9% | 13G | Aug 14, 2026 | filing ↗ | |
| Peter Kolchinsky | 9.9% | 13G | Aug 14, 2026 | filing ↗ | |
| Rajeev Shah | 9.9% | 13G | Aug 14, 2026 | filing ↗ | |
| RA Capital Healthcare Fund, L.P. | 9.9% | 13G | Aug 14, 2026 | filing ↗ | |
| Soleus Capital Master Fund, L.P. | 6.5% | 13G | May 8, 2026 | filing ↗ | |
| Soleus Capital, LLC | 6.5% | 13G | May 8, 2026 | filing ↗ | |
| Soleus Capital Group, LLC | 6.5% | 13G | May 8, 2026 | filing ↗ | |
| Soleus Capital Management, L.P. | 6.5% | 13G | May 8, 2026 | filing ↗ | |
| Soleus GP, LLC | 6.5% | 13G | May 8, 2026 | filing ↗ | |
| Guy Levy | 6.5% | 13G | May 8, 2026 | filing ↗ | |
| State Street Corporation | 5.6% | 13G | Aug 7, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| James Ziegler | $27K | Dec 15, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Earnings (2.02) | Aug 5, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 5, 2026 | filing ↗ |
| Officer/director changes (5.02) | May 20, 2026 | filing ↗ |
| Shareholder vote (5.07) | May 20, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 20, 2026 | filing ↗ |
| Officer/director changes (5.02) | Mar 25, 2026 | filing ↗ |
| Earnings (2.02) | Feb 25, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 25, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jan 12, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 12, 2026 | filing ↗ |
| Material agreement (1.01) | Jan 5, 2026 | filing ↗ |
| Exit or disposal costs (2.05) | Dec 10, 2025 | filing ↗ |
| Earnings (2.02) | Nov 5, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 5, 2025 | filing ↗ |
| Officer/director changes (5.02) | Oct 10, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Oct 10, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 10, 2025 | filing ↗ |