Allison Ambrose - Dec 16, 2024 Form 3 Insider Report for Upstream Bio, Inc. (UPB)

Signature
/s/ Michael Gray, Attorney-in-Fact
Stock symbol
UPB
Transactions as of
Dec 16, 2024
Transactions value $
$0
Form type
3
Date filed
12/17/2024, 04:15 PM

No securities are beneficially owned.

Remarks:

Exhibit 24 - Power of Attorney