| Name | Role | Date | Shares | Price | Value |
|---|---|---|---|---|---|
| Michael Nally | Chief Executive Officer | 2026-03-04 | 20,000 | $12.00 | $240.00kBuy |
| Noubar Afeyan | Director | 2026-03-02 | 1,562,500 | $16.00 | $25.00MBuy |
| Noubar Afeyan | Director | 2026-03-02 | 1,562,500 | $16.00 | $25.00MBuy |
| Noubar Afeyan | Director | 2026-03-02 | 1,562,500 | $16.00 | $25.00MBuy |
| Noubar Afeyan | Director | 2026-03-02 | 1,562,500 | $16.00 | $25.00MBuy |
| Noubar Afeyan | Director | 2026-03-02 | 1,562,500 | $16.00 | $25.00MBuy |
| Beth Grous | Chief People Officer | 2026-03-02 | 300 | $16.00 | $4.80kBuy |
| Jane L. Mendillo | Director | 2026-03-02 | 1,500 | $16.00 | $24.00kBuy |
| Jason Silvers | President CFO | 2026-03-02 | 500 | $16.00 | $8.00kBuy |
| Jason Silvers | President CFO | 2026-03-02 | 500 | $16.00 | $8.00kBuy |
| Name | Hold | Shares | Value | Type |
|---|---|---|---|---|
| Noubar Afeyan | 48.89% | 62,673,117 | $901.87M | Insider |
| Flagship Pioneering LLC | 48.89% | 62,673,117 | $901.87M | Institution |
| Fmr LLC | 3.29% | 4,217,524 | $60.69M | Institution |
| Capital World Investors | 3.12% | 4,004,149 | $57.62M | Institution |
| Braidwell LP | 2.80% | 3,592,999 | $51.70M | Institution |
| Jpmorgan Chase Co | 2.30% | 2,947,259 | $42.41M | Institution |
| Michael Nally | 2.25% | 2,889,154 | $41.57M | Insider |
| Price T Rowe Associates Inc | 1.65% | 2,109,633 | $30.36M | Institution |
| Arch Venture Management LLC | 1.52% | 1,944,426 | $27.98M | Institution |
| Harbourvest Partners LLC | 1.34% | 1,722,210 | $24.78M | Institution |