August 26, 2025 · Form 4 insider transaction
Cloonan Michael bought 17,574 shares of Sionna Therapeutics, Inc. at $6.11 per share, a transaction worth $107.4K. The trade was recorded as option exercise under a pre-scheduled Rule 10b5-1 plan and disclosed on an SEC Form 4, filed 2 days after the transaction.
This transaction was automatically executed pursuant to a Rule 10b5-1 trading plan adopted on May 21, 2025.