Keutzer Timothy sold SPRO
February 2, 2026 · Form 4 insider transaction
Keutzer Timothy sold 18,891 shares of Spero Therapeutics, Inc. at $2.20 per share, a transaction worth $41.6K. The trade was recorded as open-market sale and disclosed on an SEC Form 4, filed 3 days after the transaction.
Direction
Disposed (sell-side)
Shares
18,891
Price
$2.20
Total value
$41.6K
InsiderKeutzer Timothy
RoleOfficer
SecurityCommon Stock
Transaction codeS: Open-market sale
Transaction dateFebruary 2, 2026
Filing dateFebruary 5, 2026
Shares owned after788,853
OwnershipDirect
10b5-1 planNo
AmendedNo
Footnotes
Represents shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of RSUs. The sale occurred automatically to satisfy the tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the Reporting Person.