Keutzer Timothy sold SPRO
February 4, 2026 · Form 4 insider transaction
Keutzer Timothy sold 3,471 shares of Spero Therapeutics, Inc. at $2.24 per share, a transaction worth $7.8K. The trade was recorded as open-market sale and disclosed on an SEC Form 4, filed 1 day after the transaction.
Direction
Disposed (sell-side)
Shares
3,471
Price
$2.24
Total value
$7.8K
InsiderKeutzer Timothy
RoleOfficer
SecurityCommon Stock
Transaction codeS: Open-market sale
Transaction dateFebruary 4, 2026
Filing dateFebruary 5, 2026
Shares owned after761,158
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.