Deykin Aaron bought UPB
January 2, 2026 · Form 4 insider transaction
Deykin Aaron bought 32,000 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.
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.; Includes 1,581 shares of Common Stock previously acquired under the Issuer's 2024 Employee Stock Purchase Plan.