Smither John W bought MBX
August 3, 2026 · Form 4 insider transaction
Smither John W bought 130,000 shares of MBX Biosciences, 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
130,000
Price
$0.00
Total value
N/A
InsiderSmither John W
RoleOfficer, Director
CompanyMBX Biosciences, Inc. (MBX)
SecurityStock option (right to buy)
Transaction codeA: Grant or award
Transaction dateAugust 3, 2026
Filing dateAugust 4, 2026
Shares owned after130,000
OwnershipDirect
10b5-1 planNo
AmendedNo
Footnotes
The options will vest and become exercisable with 25% of the shares subject to the award vesting on July 13, 2027 and the remainder vesting in 36 equal monthly installments thereafter, subject to continued service on each such vesting date.