August 20, 2025 · Form 4 insider transaction
Cloonan Michael bought 25,000 shares of Sionna Therapeutics, Inc. at $6.11 per share, a transaction worth $152.8K. The trade was recorded as option exercise under a pre-scheduled Rule 10b5-1 plan and disclosed on an SEC Form 4, filed 1 day after the transaction.
This transaction was automatically executed pursuant to a Rule 10b5-1 trading plan adopted on May 21, 2025.