Tectonic Therapeutic, Inc. (TECX) ownership: Top institutional holder: FMR LLC ($87.06M). Insider activity: Net Seller (0 buys, 20 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| FMR LLC | 2816494.00 | $87.06M | 2026-03-31 |
| TCG Crossover Management, LLC | 1204891.00 | $37.24M | 2026-03-31 |
| Aberdeen Group plc | 1141824.00 | $35.29M | 2026-03-31 |
| BlackRock, Inc. | 860352.00 | $26.59M | 2026-03-31 |
| BRAIDWELL LP | 847151.00 | $26.19M | 2026-03-31 |
| First Light Asset Management, LLC | 647743.00 | $20.02M | 2026-03-31 |
| BAKER BROS. ADVISORS LP | 607788.00 | $18.79M | 2026-03-31 |
| 5AM Venture Management, LLC | 606660.00 | $18.75M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-05-04 | |
| Sell | null | 2026-04-01 | |
| Sell | null | 2026-04-01 | |
| Sell | null | 2026-03-06 | |
| Sell | null | 2026-03-06 | |
| Sell | null | 2026-03-06 | |
| Sell | null | 2026-03-06 | |
| Sell | null | 2026-03-06 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.