0001972481-24-000136.txt : 20240610 0001972481-24-000136.hdr.sgml : 20240610 20240610163310 ACCESSION NUMBER: 0001972481-24-000136 CONFORMED SUBMISSION TYPE: 144 PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20240610 DATE AS OF CHANGE: 20240610 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: Dyne Therapeutics, Inc. CENTRAL INDEX KEY: 0001818794 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] ORGANIZATION NAME: 03 Life Sciences IRS NUMBER: 364883909 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 144 SEC ACT: 1933 Act SEC FILE NUMBER: 001-39509 FILM NUMBER: 241033223 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 REPORTING-OWNER: COMPANY DATA: COMPANY CONFORMED NAME: HIGH SUSANNA GATTI CENTRAL INDEX KEY: 0001691005 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 144 MAIL ADDRESS: STREET 1: 75 LORIMER ROAD CITY: BELMONT STATE: MA ZIP: 02141 144 1 primary_doc.xml 144 0001691005 XXXXXXXX LIVE 0001818794 Dyne Therapeutics, Inc. 001-39509 1560 TRAPELO ROAD WALTHAM MA 02451 (781) 786-8230 HIGH SUSANNA GATTI Officer Common Stifel Nicolas & Company Inc.

501 N Broadway St Louis MO 63102

125270 3875853.00 87383638 06/10/2024 NASDAQ Common Stock 07/31/2020 Options Issuer N 120000 06/10/2024 Compensation Common Stock 12/10/2021 Restricted Stock Units Issuer N 5270 06/10/2024 Compensation N Susanna High

1560 TRAPELO ROAD WALTHAM, MA 02451

Common Stock 05/20/2024 2738 77403.00 06/10/2024 03/07/2024 /s/ Dominick Iadicicco, as a duly authorized representative of STIFEL as attorney-in-fact for Susanna High