🕵️ Septerna, Inc. ($SEPN)
SEC insider & ownership activity, last 12 months · CIK 1984086 · every row links its SEC filing
Over the last 12 months insiders sold $3.9M with no open-market buying against it. Shaikhly Samira sold $2.8M through a 10b5-1 trading plan in 8 lots (Mar–Jun). 2 planned sales are pending, the largest $3.3M (Jae Kim). No red-flag 8-Ks in the window.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
0 buyers, $0 (0 lots) · 3 sellers, $3.9M (19 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Shaikhly Samira | 0 | – | 8 | $2.8M | Jun 29, 2026 |
| Daniel D. Long | 0 | – | 5 | $710K | Jul 1, 2026 |
| Elizabeth Bhatt | 0 | – | 6 | $349K | Jul 15, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Third Rock Ventures V, L.P. | 14.0% | 13G | May 9, 2025 | filing ↗ | |
| Third Rock Ventures GP V, L.P. | 14.0% | 13G | May 9, 2025 | filing ↗ | |
| TRV GP V, LLC | 14.0% | 13G | May 9, 2025 | filing ↗ | |
| Driehaus Capital Management LLC | 10.5% | 13G | Jun 10, 2025 | filing ↗ | |
| Third Rock Ventures VI, L.P. | 9.5% | 13G | May 9, 2025 | filing ↗ | |
| Third Rock Ventures GP VI, L.P. | 9.5% | 13G | May 9, 2025 | filing ↗ | |
| TRV GP VI, LLC | 9.5% | 13G | May 9, 2025 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Elizabeth P. Bhatt | $138K | Jul 15, 2026 | filing ↗ |
| Jae Kim | $89K | Jun 26, 2026 | filing ↗ |
| Daniel Long | $904K | Jun 22, 2026 | filing ↗ |
| Jae Kim | $3.3M | Jun 22, 2026 | filing ↗ |
| Samira Shaikhly | $287K | Jun 12, 2026 | filing ↗ |
| Samira Shaikhly | $335K | May 26, 2026 | filing ↗ |
| Samira Shaikhly | $2.2M | Mar 2, 2026 | filing ↗ |
| Elizabeth Bhatt | $242K | Feb 18, 2026 | filing ↗ |
| Daniel David Long | $63K | Nov 10, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Shareholder vote (5.07) | Jun 26, 2026 | filing ↗ |
| Earnings (2.02) | May 11, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 11, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Apr 13, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 13, 2026 | filing ↗ |
| Earnings (2.02) | Mar 9, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 9, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Mar 1, 2026 | filing ↗ |
| Other events (8.01) | Mar 1, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 1, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jan 12, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 12, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jan 8, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 8, 2026 | filing ↗ |
| Earnings (2.02) | Nov 10, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 10, 2025 | filing ↗ |
| Officer/director changes (5.02) | Sep 25, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Sep 25, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Sep 25, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Sep 3, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Sep 3, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Aug 21, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 21, 2025 | filing ↗ |
| Earnings (2.02) | Aug 11, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 11, 2025 | filing ↗ |
| Officer/director changes (5.02) | Jul 30, 2025 | filing ↗ |