Michael Gray - Oct 10, 2024 Form 3 Insider Report for Upstream Bio, Inc. (UPB)

Role
CFO and COO
Signature
/s/ Michael Gray
Stock symbol
UPB
Transactions as of
Oct 10, 2024
Transactions value $
$0
Form type
3
Date filed
10/10/2024, 08:09 PM
Previous filing
Feb 22, 2023

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
holding UPB Stock Option (Right to Buy) Oct 10, 2024 Common Stock 445K $5.69 Direct F1
holding UPB Stock Option (Right to Buy) Oct 10, 2024 Common Stock 152K $5.69 Direct F2
* 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 March 26, 2025, with the remainder vesting in thirty-six equal monthly installments thereafter, subject to the Reporting Person's continued service on each such vesting date.
F2 25% of the shares underlying this option shall vest on April 5, 2025, with the remainder vesting in thirty-six equal monthly installments thereafter, subject to the Reporting Person's continued service on each such vesting date.

Remarks:

Exhibit 24 - Power of Attorney