Septerna, Inc. (SEPN) ownership: Top institutional holder: RA CAPITAL MANAGEMENT, L.P. ($168.11M). Insider activity: Net Seller (0 buys, 20 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| RA CAPITAL MANAGEMENT, L.P. | 6995858.00 | $168.11M | 2026-03-31 |
| TRV GP V, LLC | 6215591.00 | $149.36M | 2026-03-31 |
| Driehaus Capital Management LLC | 4395572.00 | $105.63M | 2026-03-31 |
| TRV GP VI, LLC | 4211659.00 | $101.21M | 2026-03-31 |
| SAMSARA BIOCAPITAL, LLC | 3149128.00 | $75.67M | 2026-03-31 |
| GOLDMAN SACHS GROUP INC | 2906427.00 | $69.84M | 2026-03-31 |
| Siren, L.L.C. | 2000000.00 | $48.06M | 2026-03-31 |
| BlackRock, Inc. | 1822174.00 | $43.79M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-06-12 | |
| Sell | null | 2026-06-12 | |
| Sell | null | 2026-06-12 | |
| Sell | null | 2026-06-01 | |
| Sell | null | 2026-06-01 | |
| Sell | null | 2026-06-01 | |
| Sell | null | 2026-06-01 | |
| Sell | null | 2026-06-01 |
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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.