0001972481-26-000156.txt : 20260513 0001972481-26-000156.hdr.sgml : 20260513 20260513165709 ACCESSION NUMBER: 0001972481-26-000156 CONFORMED SUBMISSION TYPE: 144 PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20260513 DATE AS OF CHANGE: 20260513 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 EIN: 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: 26974340 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: Cox John CENTRAL INDEX KEY: 0001498428 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 144 MAIL ADDRESS: STREET 1: C/O BIOVERATIV INC. STREET 2: 225 SECOND AVENUE CITY: WALTHAM STATE: MA ZIP: 02451 144 1 primary_doc.xml 144 0001498428 XXXXXXXX LIVE 0001818794 Dyne Therapeutics, Inc. 001-39509 1560 TRAPELO ROAD WALTHAM MA 02451 (781) 786-8230 Cox John Officer Common Stock Stifel Nicolaus & Company Inc

501 N Broadway St. Louis MO 63102

3311 60805.00 165313769 05/13/2026 Nasdaq Common Stock 05/12/2026 Restricted Stock Units Issuer N 11250 05/12/2026 Equity Compensation N John Cox

1560 Trapelo Rd Waltham MA 02451

Common Stock 03/05/2026 2732 40707.00 05/13/2026 /s/ James Weimer, as a duly authorized representative of STIFEL, as attorney-in-fact for John Cox