Cloonan Michael sold SION
October 16, 2025 · Form 4 insider transaction
Cloonan Michael sold 200 shares of Sionna Therapeutics, Inc. at $34.00 per share, a transaction worth $6.8K. 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.
Direction
Disposed (sell-side)
Shares
200
Price
$34.00
Total value
$6.8K
InsiderCloonan Michael
RoleOfficer, Director
SecurityCommon Stock
Transaction codeS: Open-market sale
Transaction dateOctober 16, 2025
Filing dateOctober 17, 2025
Shares owned after547,343
OwnershipDirect
10b5-1 planYes
AmendedNo
Footnotes
This transaction was automatically executed pursuant to a Rule 10b5-1 trading plan adopted on May 21, 2025.