17 insiders reported 72 Form 4 transactions for Septerna, Inc. (SEPN) over the past 18 months (most recent 2026-08-14). Recent activity: Third Rock Ventures GP V, LP (10% Owner) Buy 147,059 shares, RA Capital Healthcare Fund LP (Director) Sell 746,500 shares, TRV GP VI, LLC (10% Owner) Buy 147,059 shares, RA Capital Healthcare Fund LP (Director) Sell 746,500 shares, RA CAPITAL MANAGEMENT, L.P. (Director) Sell 746,500 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-14 | Third Rock Ventures GP V, LP | 10% Owner | Buy | 147,059 | $7.4M |
| 2026-08-14 | RA Capital Healthcare Fund LP | Director | Sell | 746,500 | $31.7M |
| 2026-08-14 | TRV GP VI, LLC | 10% Owner | Buy | 147,059 | $7.4M |
| 2026-08-14 | RA Capital Healthcare Fund LP | Director | Sell | 746,500 | $31.7M |
| 2026-08-14 | RA CAPITAL MANAGEMENT, L.P. | Director | Sell | 746,500 | $31.7M |
| 2026-08-14 | Kolchinsky Peter | Director | Sell | 746,500 | $31.7M |
| 2026-08-14 | Shah Rajeev M. | Director | Sell | 746,500 | $31.7M |
| 2026-08-14 | TRV GP V, LLC | 10% Owner | Buy | 147,059 | $7.4M |
| 2026-08-14 | RA Capital Nexus Fund III, L.P. | Director | Sell | 746,500 | $31.7M |
| 2026-08-14 | Third Rock Ventures VI, L.P. | 10% Owner | Buy | 147,059 | $7.4M |
| 2026-08-14 | Third Rock Ventures GP VI, L.P. | 10% Owner | Buy | 147,059 | $7.4M |
| 2026-08-14 | Third Rock Ventures VI, L.P. | 10% Owner | Buy | 141 | $7,202 |
| 2026-08-14 | Third Rock Ventures GP V, LP | 10% Owner | Buy | 141 | $7,202 |
| 2026-08-14 | TRV GP VI, LLC | 10% Owner | Buy | 141 | $7,202 |
| 2026-08-14 | Third Rock Ventures GP VI, L.P. | 10% Owner | Buy | 141 | $7,202 |
| 2026-08-14 | TRV GP V, LLC | 10% Owner | Buy | 141 | $7,202 |
| 2026-08-14 | RA CAPITAL MANAGEMENT, L.P. | Director | Sell | 746,500 | $31.7M |
| 2026-08-14 | Kolchinsky Peter | Director | Sell | 746,500 | $31.7M |
| 2026-08-14 | Shah Rajeev M. | Director | Sell | 746,500 | $31.7M |
| 2026-08-14 | Third Rock Ventures V, L.P. | 10% Owner | Buy | 141 | $7,202 |
| 2026-08-14 | RA Capital Nexus Fund III, L.P. | Director | Sell | 746,500 | $31.7M |
| 2026-08-14 | Third Rock Ventures V, L.P. | 10% Owner | Buy | 147,059 | $7.4M |
| 2026-08-13 | Bhatt Elizabeth | President and COO | Buy | 18,681 | $127,218 |
| 2026-08-13 | Bhatt Elizabeth | President and COO | Buy | 6,319 | $17,440 |
| 2026-08-13 | Bhatt Elizabeth | President and COO | Sell | 25,000 | $1.1M |
Source: SEC Form 4 filings · as of 2026-08-14