Ridloff Elena bought SION
September 17, 2026 · Form 4 insider transaction
Ridloff Elena bought 47,269 shares of Sionna Therapeutics, Inc. at $0.00 per share, a transaction worth N/A. The trade was recorded as grant or award and disclosed on an SEC Form 4, filed 1 day after the transaction.
Direction
Acquired (buy-side)
Shares
47,269
Price
$0.00
Total value
N/A
InsiderRidloff Elena
RoleOfficer, Director
SecurityCommon Stock
Transaction codeA: Grant or award
Transaction dateSeptember 17, 2026
Filing dateSeptember 18, 2026
Shares owned after85,801
OwnershipDirect
10b5-1 planNo
AmendedNo
Footnotes
Represents a grant of restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of Common Stock of the Issuer. The RSUs will vest on June 17, 2027, subject to the Reporting Person's continued service with the Issuer as of the vesting date.