Dyne Therapeutics, Inc.

DYN·NASDAQ·$18.15Share Price as of 11/2·$3BMarket Cap as of 11/2

Financials

10-QQ2 ended 06/30/2607/29/26 10-QQ1 ended 03/31/2605/11/26 10-KFY 202503/02/26 10-QQ3 ended 09/30/2511/05/25 10-QQ2 ended 06/30/2507/28/25

Disclosures

8-KCurrent report09/29/26 8-KCurrent report07/29/26 8-KCurrent report07/22/26 8-KCurrent report07/20/26 8-KCurrent report06/22/26

Prospectuses and Registrations

424B5Prospectus supplement07/22/26 424B5Prospectus supplement07/21/26 S-8Registration of securities for employees03/27/26 S-8Registration of securities for employees03/02/26 424B5Prospectus supplement12/10/25

Proxies

DEF 14ADefinitive proxy04/23/26 DEFA14AAdditional proxy materials04/23/26 PRE 14APreliminary proxy04/09/26 DEF 14ADefinitive proxy04/15/25 DEFA14AAdditional proxy materials04/15/25

Ownership

Form 4Insider transaction10/22/26 Form 4Insider transaction10/06/26 144Proposed sale of securities09/08/26 144Proposed sale of securities09/08/26 Form 4Insider transaction09/08/26

Other

ARSAnnual report to shareholders04/23/26 ARSAnnual report to shareholders04/15/25 ARSAnnual report to shareholders04/05/24 ARSAnnual report to shareholders04/07/23 EFFECTRequest for effectiveness11/17/21