Rajavelu Esther bought SPRO
February 2, 2026 · Form 4 insider transaction
Rajavelu Esther bought 249,000 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 2 days after the transaction.
Direction
Acquired (buy-side)
Shares
249,000
Price
$0.00
Total value
N/A
InsiderRajavelu Esther
RoleOfficer
SecurityCommon Stock
Transaction codeA: Grant or award
Transaction dateFebruary 2, 2026
Filing dateFebruary 4, 2026
Shares owned after1,118,450
OwnershipDirect
10b5-1 planNo
AmendedNo
Footnotes
Consists of restricted stock units ("RSUs") granted to Reporting Person under Issuer's 2017 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 February 2, 2027, subject to the Reporting Person's continued service through the applicable vesting date.