0001085146-25-005194.txt : 20250814 0001085146-25-005194.hdr.sgml : 20250814 20250814132854 ACCESSION NUMBER: 0001085146-25-005194 CONFORMED SUBMISSION TYPE: SCHEDULE 13G/A PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20250814 DATE AS OF CHANGE: 20250814 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: RHYTHM PHARMACEUTICALS, INC. CENTRAL INDEX KEY: 0001649904 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] ORGANIZATION NAME: 03 Life Sciences EIN: 462159271 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SCHEDULE 13G/A SEC ACT: 1934 Act SEC FILE NUMBER: 005-90134 FILM NUMBER: 251217006 BUSINESS ADDRESS: STREET 1: 222 BERKELEY STREET STREET 2: 12TH FLOOR CITY: BOSTON STATE: MA ZIP: 02116 BUSINESS PHONE: 857-264-4280 MAIL ADDRESS: STREET 1: 222 BERKELEY STREET STREET 2: 12TH FLOOR CITY: BOSTON STATE: MA ZIP: 02116 FORMER COMPANY: FORMER CONFORMED NAME: RHYTHM METABOLIC, INC. DATE OF NAME CHANGE: 20150803 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: PRIMECAP MANAGEMENT CO/CA/ CENTRAL INDEX KEY: 0000763212 ORGANIZATION NAME: EIN: 953868081 FILING VALUES: FORM TYPE: SCHEDULE 13G/A BUSINESS ADDRESS: STREET 1: 177 EAST COLORADO BLVD. STREET 2: 11TH FLOOR CITY: PASADENA STATE: CA ZIP: 91105 BUSINESS PHONE: 6263049222 MAIL ADDRESS: STREET 1: 177 EAST COLORADO BLVD. STREET 2: 11TH FLOOR CITY: PASADENA STATE: CA ZIP: 91105 SCHEDULE 13G/A 1 primary_doc.xml SCHEDULE 13G/A 0001104659-20-050946 0000763212 XXXXXXXX LIVE 10 COM 06/30/2025 0001649904 Rhythm Pharmaceuticals, Inc. 76243J105 222 Berkeley Street 12th Floor Boston CA 02116 Rule 13d-1(b) PRIMECAP MANAGEMENT CO/CA/ X1 4878037.00 0.00 4878037.00 0.00 4878037.00 N 7.67 IA Rhythm Pharmaceuticals, Inc. 222 Berkeley Street, 12th Floor, Boston, CALIFORNIA 02116 PRIMECAP MANAGEMENT CO/CA/ 177 EAST COLORADO BLVD. 11TH FLOOR PASADENA, California 91105 PRIMECAP MANAGEMENT CO/CA/ - UNITED STATES N IA 4,878,037 7.67 PRIMECAP MANAGEMENT CO/CA/ - 4,878,037 PRIMECAP MANAGEMENT CO/CA/ - 0 PRIMECAP MANAGEMENT CO/CA/ - 4,878,037 PRIMECAP MANAGEMENT CO/CA/ - 0 Y Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. PRIMECAP MANAGEMENT CO/CA/ Jorge A. Rodriguez 08/13/2025