Ambrose Allison bought UPB
January 2, 2026 · Form 4 insider transaction
Ambrose Allison bought 17,000 shares of Upstream Bio, 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 4 days after the transaction.
Direction
Acquired (buy-side)
Shares
17,000
Price
$0.00
Total value
N/A
InsiderAmbrose Allison
RoleOfficer
CompanyUpstream Bio, Inc. (UPB)
SecurityCommon Stock
Transaction codeA: Grant or award
Transaction dateJanuary 2, 2026
Filing dateJanuary 6, 2026
Shares owned after17,000
OwnershipDirect
10b5-1 planNo
AmendedNo
Footnotes
Represents restricted stock units ("RSUs") granted pursuant to the Issuer's 2024 Stock Option and Incentive Plan. Each RSU represents the contingent right to receive one share of the Issuer's Common Stock upon vesting. The RSUs shall vest in sixteen equal quarterly installments following January 1, 2026, subject to the Reporting Person's continued service on each such vesting date.