0001104659-26-009764.txt : 20260203 0001104659-26-009764.hdr.sgml : 20260203 20260203163157 ACCESSION NUMBER: 0001104659-26-009764 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20260201 FILED AS OF DATE: 20260203 DATE AS OF CHANGE: 20260203 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Garfield Alastair CENTRAL INDEX KEY: 0002027261 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-38223 FILM NUMBER: 26593599 MAIL ADDRESS: STREET 1: C/O RHYTHM PHARMACEUTICALS STREET 2: 222 BERKELEY STREET, SUITE 1200 CITY: BOSTON STATE: MA ZIP: 02116 ISSUER: 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 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 4 1 tm264963-2_4seq1.xml OWNERSHIP DOCUMENT X0508 4 2026-02-01 0 0001649904 RHYTHM PHARMACEUTICALS, INC. RYTM 0002027261 Garfield Alastair 222 BERKELEY STREET, 12TH FLOOR BOSTON MA 02116 0 1 0 0 Chief Scientific Officer 0 Common Stock 2026-02-01 4 M 0 6663 A 9789 D Common Stock 2026-02-01 4 F 0 2026 108.99 D 7763 D Restricted Stock Units 2026-02-01 4 M 0 6663 0 D Common Stock 6663 19987 D Each restricted stock unit represents a contingent right to receive one share of Issuer common stock. These shares were withheld for payment of the withholding taxes upon the vesting of the restricted stock units reported herein. The restricted stock units vest as to 25% of the total shares on each of February 1, 2026, February 1, 2027, February 1, 2028 and February 1, 2029. The restricted stock units have no expiration date. /s/ Stephen Vander Stoep, attorney-in-fact for Alastair Garfield 2026-02-03