0001209191-23-050174.txt : 20230920 0001209191-23-050174.hdr.sgml : 20230920 20230920164938 ACCESSION NUMBER: 0001209191-23-050174 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20230918 FILED AS OF DATE: 20230920 DATE AS OF CHANGE: 20230920 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Scalzo Richard William CENTRAL INDEX KEY: 0001789545 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-39509 FILM NUMBER: 231266988 MAIL ADDRESS: STREET 1: 25 ALBERTA LANE CITY: HOLLISTON STATE: MA ZIP: 01746 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: Dyne Therapeutics, Inc. CENTRAL INDEX KEY: 0001818794 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] IRS NUMBER: 364883909 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 1560 TRAPELO ROAD CITY: WALTHAM STATE: MA ZIP: 02451 BUSINESS PHONE: (781) 786-8230 MAIL ADDRESS: STREET 1: 1560 TRAPELO ROAD CITY: WALTHAM STATE: MA ZIP: 02451 4 1 doc4.xml FORM 4 SUBMISSION X0508 4 2023-09-18 0 0001818794 Dyne Therapeutics, Inc. DYN 0001789545 Scalzo Richard William C/O DYNE THERAPEUTICS, INC. 1560 TRAPELO ROAD WALTHAM MA 02451 0 1 0 0 See Remarks 0 Common Stock 2023-09-18 4 S 0 1290 9.41 D 40795 D Represents shares automatically sold by the Reporting Person to satisfy tax withholding obligations in connection with the vesting of restricted stock units granted to the Reporting Person on September 17, 2020. The automatic sale of the Reporting Person's shares is provided for in a restricted stock unit agreement constituting a "binding contract" consistent with the affirmative defense to liability under Rule 10b5-1 and the sale does not represent a discretionary trade by the Reporting Person. Includes 37,451 unvested RSUs. Senior Vice President, Head of Finance and Administration /s/ Richard Scalzo 2023-09-20