TCG Crossover GP I, LLC - Dec 31, 2024 SCHEDULE 13G Report for Upstream Bio, Inc. Common Stock, par value $0.001 per share (UPB)

Filing Manager
TCG Crossover GP I, LLC
Reporting Manager
TCG Crossover GP I, LLC
Security
Upstream Bio, Inc. Common Stock, par value $0.001 per share
Symbol
UPB
Shares outstanding
53.9M shares
Disclosed Ownership
2.8M shares
Ownership
5.2%
Form type
SCHEDULE 13G
Date filed
2/14/2025, 04:23 PM
Date of event
Dec 31, 2024
Next filing
Nov 14, 2025
SEC
View on sec.gov

Reporting Managers (3)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
TCG Crossover GP I, LLC 5.2% 2.8M 0 2.8M /s/ Craig Skaling Authorized Signatory
TCG Crossover Fund I, L.P. 5.2% 2.8M 0 2.8M /s/ Craig Skaling Authorized Signatory
Chen Yu 5.2% 2.8M 0 2.8M /s/ Craig Skaling By POA as Attorney-in-Fact