Zack Debra bought SPRO
August 3, 2026 · Form 4 insider transaction
Zack Debra bought 162,311 shares of Spero 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 3 days after the transaction.
Direction
Acquired (buy-side)
Shares
162,311
Price
$0.00
Total value
N/A
InsiderZack Debra
RoleOfficer
SecurityCommon Stock
Transaction codeA: Grant or award
Transaction dateAugust 3, 2026
Filing dateAugust 6, 2026
Shares owned after162,311
OwnershipDirect
10b5-1 planNo
AmendedNo
Footnotes
Consists of restricted stock units ("RSUs") granted to Reporting Person under Issuer's 2019 Stock Incentive Plan. Each RSU represents the right to receive one share of common stock upon vesting. The RSUs vest in four equal annual installments beginning on August 3, 2027, subject to the Reporting Person's continued service through the applicable vesting date.