Primecap Management Co/Ca/ - Sep 30, 2025 SCHEDULE 13G/A Report for Rhythm Pharmaceuticals, Inc. COM (RYTM)

Reporting Manager
PRIMECAP MANAGEMENT CO/CA/
Symbol
RYTM
Shares outstanding
66.4M shares
Disclosed Ownership
4.26M shares
Ownership
6.42%
Form type
SCHEDULE 13G/A
Date filed
11/14/2025, 12:14 PM
Date of event
Sep 30, 2025
Previous filing
Aug 14, 2025

Reporting Managers (1)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
PRIMECAP MANAGEMENT CO/CA/ 6.42% 4.26M 4.26M 0 Jorge A. Rodriguez Deputy Chief Compliance Officer