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Insider selling
Peter A. Thompson sold $13.4M of Sionna Therapeutics, Inc. (SION) stock
Peter A. Thompson, Dir of Sionna Therapeutics, Inc. (SION), sold 292,952 shares of SION stock worth $13.4M, per an SEC Form 4 filed May 11, 2026.
The sale was pre-arranged (a 10b5-1 plan or an option exercise), not a fresh decision.
The trade happened on May 7, 2026, 4 days before it was made public.
SION has moved -86.1% since the trade date, from $43.31 to $6.00 (Sep 21, 2026 close).
- Traded
- May 7, 2026
- Disclosed
- May 11, 2026
- Filing delay
- 4 days
- Price since
- -86.1%
- Role
- Dir
- Source
- SEC Form 4
More SION insider and Congress trades
From a public SEC Form 4, linked above. Not investment advice, and not a recommendation to buy or sell.