AlphaYouJC
Insider selling
John Cox sold $131K of Dyne Therapeutics, Inc. (DYN) stock
John Cox, CEO & President of Dyne Therapeutics, Inc. (DYN), sold 4,986 shares of DYN stock worth $131K, per an SEC Form 4 filed Aug 17, 2026.
The sale was pre-arranged (a 10b5-1 plan or an option exercise), not a fresh decision.
The trade happened on Aug 13, 2026, 4 days before it was made public.
DYN has moved -34.1% since the trade date, from $25.96 to $17.12 (Sep 21, 2026 close).
- Traded
- Aug 13, 2026
- Disclosed
- Aug 17, 2026
- Filing delay
- 4 days
- Price since
- -34.1%
- Role
- CEO & President
- Source
- SEC Form 4
More DYN insider and Congress trades
From a public SEC Form 4, linked above. Not investment advice, and not a recommendation to buy or sell.