AlphaYouTR
Insider selling
Third Rock Ventures V, L.P. sold $7.4M of Septerna, Inc. (SEPN) stock
Third Rock Ventures V, L.P., 10% owner of Septerna, Inc. (SEPN), sold 147,200 shares of SEPN stock worth $7.4M, per an SEC Form 4 filed Aug 14, 2026.
The sale was pre-arranged (a 10b5-1 plan or an option exercise), not a fresh decision.
The trade happened on Aug 12, 2026, 2 days before it was made public.
SEPN has moved -20.0% since the trade date, from $48.19 to $38.54 (Sep 21, 2026 close).
- Traded
- Aug 12, 2026
- Disclosed
- Aug 14, 2026
- Filing delay
- 2 days
- Price since
- -20.0%
- Role
- 10% owner
- Source
- SEC Form 4
More SEPN insider and Congress trades
From a public SEC Form 4, linked above. Not investment advice, and not a recommendation to buy or sell.