🕵️ Generate Biomedicines, Inc. ($GENB)
SEC insider & ownership activity, last 12 months · CIK 2100782 · every row links its SEC filing
Over the last 12 months insiders bought $150.3M with no open-market selling against it. Afeyan Noubar bought $150.0M (Mar). No red-flag 8-Ks in the window.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
5 buyers, $150.3M (12 lots) · 0 sellers, $0 (0 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Afeyan Noubar | 6 | $150.0M | 0 | – | Mar 2, 2026 |
| Nally Michael | 1 | $240K | 0 | – | Mar 4, 2026 |
| Silvers Jason | 3 | $32K | 0 | – | Mar 2, 2026 |
| Jane L. Mendillo | 1 | $24K | 0 | – | Mar 2, 2026 |
| Grous Beth | 1 | $5K | 0 | – | Mar 2, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Flagship Pioneering, LLC | 48.9% | 13G | May 15, 2026 | filing ↗ | |
| Afeyan Noubar | 48.9% | 13G | May 15, 2026 | filing ↗ | |
| Flagship Venturelabs VI, LLC | 19.5% | 13G | May 15, 2026 | filing ↗ | |
| Flagship Venturelabs VI Manager LLC | 19.5% | 13G | May 15, 2026 | filing ↗ | |
| Flagship Pioneering Fund VII, L.P. | 13.1% | 13G | May 15, 2026 | filing ↗ | |
| Flagship Pioneering Fund VII General Partner LLC | 13.1% | 13G | May 15, 2026 | filing ↗ | |
| Flagship Pioneering Fund VI, L.P. | 9.9% | 13G | May 15, 2026 | filing ↗ | |
| Flagship Pioneering Fund VI General Partner LLC | 9.9% | 13G | May 15, 2026 | filing ↗ | |
| Nally Michael | 5.2% | 13G | May 15, 2026 | filing ↗ |
Planned insider sales (Form 144)
No sale notices filed in the last 12 months.
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Earnings (2.02) | May 7, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 7, 2026 | filing ↗ |
| Charter/bylaw changes (5.03) | Feb 26, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 26, 2026 | filing ↗ |