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Schedule 13G

UPB Schedule 13G filing by Norges Bank

Norges Bank reported beneficial ownership of 2.9M shares, representing 5.3% of UPSTREAM BIO INC in this filing.

FiledOct 24, 2025
Ownership dateSep 30, 2025
Reported shares2.9M
Reported ownership5.3%
Ownership details

Voting and dispositive power reported in the filing

These figures describe the reporting filer’s disclosed voting and investment authority. They should be read together with the reported share count and percentage.

Sole voting power 2.9M
Shared voting power 0
Sole dispositive power 2.9M
Shared dispositive power 0
Price context

Price dates alongside the ownership filing

Price data provides market context around the disclosure. It does not identify the filer’s actual transaction price.

Close near filing date$21.86as of Oct 24, 2025
Latest tracked price$6.63as of Aug 5, 2026
Source

Original filing and accession

Use the SEC filing as the primary source when you need the complete disclosure, footnotes, exhibits, or reporting-person details.

Reporting filer
Norges Bank
CIK
CIK0001374170
Accession
0001374170-25-000084
Form
Schedule 13G
Open SEC filing View UPB ownership history
Read the filing in context

Understand what a Schedule 13 filing does—and does not—tell you.

How to read a Schedule 13G → Does a 13G mean the shares were just bought? → Filing date vs. ownership date →