0001662579-25-000018.txt : 20250218 0001662579-25-000018.hdr.sgml : 20250218 20250218165506 ACCESSION NUMBER: 0001662579-25-000018 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20250214 FILED AS OF DATE: 20250218 DATE AS OF CHANGE: 20250218 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Mossler Mark CENTRAL INDEX KEY: 0001992219 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-39567 FILM NUMBER: 25635890 MAIL ADDRESS: STREET 1: C4 THERAPEUTICS, INC. STREET 2: 490 ARSENAL WAY, SUITE 120 CITY: WATERTOWN STATE: MA ZIP: 02472 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: C4 Therapeutics, Inc. CENTRAL INDEX KEY: 0001662579 STANDARD INDUSTRIAL CLASSIFICATION: BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836] ORGANIZATION NAME: 03 Life Sciences IRS NUMBER: 475617627 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 490 ARSENAL WAY STREET 2: SUITE 120 CITY: WATERTOWN STATE: MA ZIP: 02472 BUSINESS PHONE: (617) 231-0700 MAIL ADDRESS: STREET 1: 490 ARSENAL WAY STREET 2: SUITE 120 CITY: WATERTOWN STATE: MA ZIP: 02472 4 1 wk-form4_1739915700.xml FORM 4 X0508 4 2025-02-14 0 0001662579 C4 Therapeutics, Inc. CCCC 0001992219 Mossler Mark C/O C4 THERAPEUTICS, INC. 490 ARSENAL WAY #120 WATERTOWN MA 02472 0 1 0 0 Chief Accounting Officer 0 Common Stock 2025-02-14 4 F 0 1586 3.18 D 18204 D Represents shares withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting and settlement of restricted stock units ("RSUs") and does not represent a sale by the Reporting Person. /s/ Shagha Russell, Attorney-in-Fact 2025-02-18