Cloonan Michael sold SION
October 21, 2025 · Form 4 insider transaction
Cloonan Michael sold 30,049 shares of Sionna Therapeutics, Inc. at $35.63 per share, a transaction worth $1.07M. The trade was recorded as open-market sale under a pre-scheduled Rule 10b5-1 plan and disclosed on an SEC Form 4, filed 1 day after the transaction.
Footnotes
This transaction was automatically executed pursuant to a Rule 10b5-1 trading plan adopted on May 21, 2025.; The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $35.00 to $35.99, inclusive. The Reporting Person undertakes to provide to the Issuer, any securityholder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price at which the transactions were effected.