Insider holders · CIK 0001984086
Septerna, Inc. · SEPN
Every insider with a reported Table I holding at this company, ranked by their last-reported share count. A balance is only as fresh as its filing — the report date sits next to every row on purpose. ← Back to activity
| Insider | Direct shares | Indirect shares | Total reported | Last report (ET) | From |
|---|---|---|---|---|---|
| TRV GP V, LLC10% Owner | 6,068,391 | 4,211,659 | 10,280,050 | Aug 14, 2026 · 5:44 pm EDT | Form 4 |
| TRV GP VI, LLC10% Owner | 6,068,391 | 4,211,659 | 10,280,050 | Aug 14, 2026 · 5:44 pm EDT | Form 4 |
| Third Rock Ventures GP VI, L.P.10% Owner | 6,068,391 | 4,211,659 | 10,280,050 | Aug 14, 2026 · 5:44 pm EDT | Form 4 |
| Third Rock Ventures GP V, LP10% Owner | 6,068,391 | 4,211,659 | 10,280,050 | Aug 14, 2026 · 5:44 pm EDT | Form 4 |
| Third Rock Ventures VI, L.P.10% Owner | 6,068,391 | 4,211,659 | 10,280,050 | Aug 14, 2026 · 5:44 pm EDT | Form 4 |
| Third Rock Ventures V, L.P.10% Owner | 6,068,391 | 4,211,659 | 10,280,050 | Aug 14, 2026 · 5:44 pm EDT | Form 4 |
| RA Capital Nexus Fund III, L.P.Director | — | 725,443 | 725,443 | Aug 14, 2026 · 5:11 pm EDT | Form 4 |
| Rajeev M. ShahDirector | — | 725,443 | 725,443 | Aug 14, 2026 · 5:11 pm EDT | Form 4 |
| Peter KolchinskyDirector | — | 725,443 | 725,443 | Aug 14, 2026 · 5:11 pm EDT | Form 4 |
| RA CAPITAL MANAGEMENT, L.P.Director | — | 725,443 | 725,443 | Aug 14, 2026 · 5:11 pm EDT | Form 4 |
| RA Capital Healthcare Fund LPDirector | — | 725,443 | 725,443 | Aug 14, 2026 · 5:11 pm EDT | Form 4 |
| Elizabeth BhattPresident and COO | 174,209 | — | 174,209 | Aug 13, 2026 · 7:00 pm EDT | Form 4 |
| Daniel D. LongSVP, Drug Discovery | 96,412 | — | 96,412 | Sep 3, 2026 · 7:01 pm EDT | Form 4 |
| Samira ShaikhlyChief People Officer | 793 | — | 793 | Jun 30, 2026 · 7:01 pm EDT | Form 4 |
Balances come from each insider’s most recent filing that reports a Table I holding; an insider who left the company years ago still appears with their last-known figure and its date. Indirect totals collapse multiple vehicles (trusts, LLCs) into one number — open the filing for the breakdown. Shares as filed, not split-adjusted.