Schedule 13G ownership disclosure

GENERATION BIO CO

COMMON STOCK · CUSIP: 37148K209

Event date: 2025-09-30

Filing-level shares
576,789
Percent of class
8.6%
  • T. Rowe Price Associates, Inc.

    Shares: 576,789 · Class: 8.6%

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

Source: SEC EDGAR filing

Filing metadata

Accession number
0000080255-25-000831
Form type
SCHEDULE 13G/A
Filer
Generation Bio Co.
CIK
CIK 1733294
Filed
Nov 14, 2025
Reporting period
Sep 30, 2025
Description
Schedule 13G beneficial ownership

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