Allison Ambrose - Dec 16, 2024 Form 4 Insider Report for Upstream Bio, Inc. (UPB)

Role
General Counsel
Signature
/s/ Michael Gray, Attorney-in-Fact
Stock symbol
UPB
Transactions as of
Dec 16, 2024
Transactions value $
$0
Form type
4
Date filed
12/17/2024, 04:18 PM

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction UPB Stock Option (Right to Buy) Award $0 +100K $0.00 100K Dec 16, 2024 Common Stock 100K $19.01 Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 25% of the shares underlying this option shall vest on December 16, 2025, with the remainder vesting in thirty-six equal monthly installments thereafter, subject to the Reporting Person's continued service on such vesting date.