Form 4: Septerna Insider Reports Stock Transaction
Insider Transaction (Form 4)
Third Rock Ventures V, L.P. and 5 others reported changes in beneficial ownership of Septerna, Inc. common stock on August 12, 2026.
Summary
- Open-market sale: acquired 147,059 Common Stock at $50.27 ($7,392,656) on August 12, 2026; holds 6,068,532 after (Direct).
- Open-market sale: acquired 141 Common Stock at $51.08 ($7,202) on August 12, 2026; holds 6,068,391 after (Direct).
Sentiment
Score: 5
Explanation: StockSavvy.ai views this as routine: the reported changes are grants, option exercises, tax withholding or similar administrative transactions, which carry limited directional signal.
Insider Transactions
Third Rock Ventures V, L.P. — 10% owner
Third Rock Ventures GP V, LP — 10% owner
Trv Gp V, Llc — 10% owner
Third Rock Ventures VI, L.P. — 10% owner
Third Rock Ventures GP VI, L.P. — 10% owner
Trv Gp Vi, Llc — 10% owner
Transaction made under a Rule 10b5-1 trading plan.
| Date | Transaction | Security | Shares | Price | Value | Held After |
|---|---|---|---|---|---|---|
| 2026-08-12 | Open-market sale | Common Stock | 147,059 | $50 | $7.4M | 6,068,532 |
| 2026-08-12 | Open-market sale | Common Stock | 141 | $51 | $7.2K | 6,068,391 |
Key Dates
| Date | Description |
|---|---|
| 2026-08-12 | Open-market sale (147,059 shares) |
| 2026-08-12 | Open-market sale (141 shares) |
Keywords
insider transaction, Form 4, SEPN, Septerna, Inc., neutral, Third Rock Ventures V, L.P., Third Rock Ventures GP V, LP, Trv Gp V, Llc, Third Rock Ventures VI, L.P., Third Rock Ventures GP VI, L.P., Trv Gp Vi, Llc
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