0001972481-24-000123.txt : 20240520 0001972481-24-000123.hdr.sgml : 20240520 20240520180041 ACCESSION NUMBER: 0001972481-24-000123 CONFORMED SUBMISSION TYPE: 144 PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20240520 DATE AS OF CHANGE: 20240520 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: 24966267 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: Beskrovnaya Oxana CENTRAL INDEX KEY: 0001824542 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 144 MAIL ADDRESS: STREET 1: C/O DYNE THERAPEUTICS, INC. STREET 2: 830 WINTER STREET CITY: WALTHAM STATE: MA ZIP: 02451 144 1 primary_doc.xml 144 0001824542 XXXXXXXX LIVE 0001818794 Dyne Therapeutics, Inc. 001-39509 1560 TRAPELO ROAD WALTHAM MA 02451 (781) 786-8230 Beskrovnaya Oxana Officer Common Stock Stifel Nicolaus & Company Inc.

501 N Broadway St Louis MO 63102

30426 1002652.00 87383638 05/20/2024 NASDAQ Common Stock 01/06/2020 Options Issuer N 30426 05/20/2024 Cash N Oxana Beskrovnaya

1560 TRAPELO ROAD WALTHAM MA 02451

Common Stock 03/11/2024 2081 53484.00 Oxana Beskrovnaya

1560 TRAPELO ROAD WALTHAM MA 02451

Common Stock 05/16/2024 2704 76442.00 05/20/2024 06/30/2023 /s/ Dominick Iadicicco, as a duly authorized representative of STIFEL as attorney-in-fact for Oxana Beskrovnaya