Schedule 13G ownership disclosure

Upstream Bio Inc

Common Stock · CUSIP: 91678A107

Event date: 2025-09-30

Filing-level shares
2,882,647.00
Percent of class
5.3%
  • Norges Bank

    Shares: 2,882,647.00 · Class: 5.3%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.

Source: SEC EDGAR filing

Filing metadata

Accession number
0001374170-25-000084
Form type
SCHEDULE 13G
Filer
NORGES BANK
CIK
CIK 1374170
Filed
Oct 24, 2025
Reporting period
Sep 30, 2025
Description
Schedule 13G beneficial ownership

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