AlphaYouRC
Insider selling
Ra Capital Management, L.P. sold $21.8M of Sionna Therapeutics, Inc. (SION) stock
Ra Capital Management, L.P., Dir, 10% of Sionna Therapeutics, Inc. (SION), sold 3,448,811 shares of SION stock worth $21.8M, per an SEC Form 4 filed Sep 21, 2026.
It was an open-market sale.
The trade happened on Sep 17, 2026, 4 days before it was made public.
SION has moved -16.4% since the trade date, from $7.18 to $6.00 (Sep 21, 2026 close).
- Traded
- Sep 17, 2026
- Disclosed
- Sep 21, 2026
- Filing delay
- 4 days
- Price since
- -16.4%
- Role
- Dir, 10%
- 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.