Current Report · Items 2.02, 9.01 · 8-K

Dyne Therapeutics, Inc.

DYNNASDAQEQUITYCurrent

Results of Operations and Financial Condition

Filed May 11, 2026Accepted May 11, 2026, 7:35 AM EDTCIK 1818794Accession 0001193125-26-215720

Company context

Dyne Therapeutics is focused on delivering functional improvement for people living with genetically driven neuromuscular diseases. We are developing therapeutics that target muscle and the central nervous system (CNS) to address the root cause of disease. The company is advancing clinical programs for Duchenne muscular dystrophy (DMD) and myotonic dystrophy type 1 (DM1) as well as preclinical programs for facioscapulohumeral muscular dystrophy (FSHD), Pompe disease and multiple DMD mutations. At Dyne, we are on a mission to deliver functional improvement for individuals, families and communities. Learn more at https://www.dyne-tx.com/, and follow us on X, LinkedIn and Facebook.

Current securities

DYNNASDAQ · EQUITY · Current

Recent company filings

Disclosure sections

Items 2.02, 9.01

Select an item to read the extracted section. The as-filed document remains the primary evidence.

Item 2.02Item 2.02 - Results of Operations

Item 2.02 Results of Operations and Financial Condition. On May 11, 2026, Dyne Therapeutics, Inc. (the “Company”) issued a press release announcing the Company’s financial results for the quarter ended March 31, 2026. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference. The information in this Form 8-K, including Exhibit 99.1 attached hereto, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference into any filing by the Company under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such filling.

Filed exhibits (1)

EX-99.1 (by filename) dyn-ex99_1.htm

EX-99.1 2 dyn-ex99_1.htm EX-99.1 EX-99.1 Exhibit 99.1 Dyne Therapeutics Reports First Quarter 2026 Financial Results and Recent Business Highlights - Positive pre-BLA meeting completed with FDA for z-rostudirsen in exon 51 DMD; on track for BLA submission in Q2 2026 and potential launch in Q1 2027 - - Positive cardiopulmonary results and long-term dystrophin data from Phase 1/2 DELIVER trial of z-rostudirsen in exon 51 DMD presented at MDA conference - - Completion of enrollment in registrational expansion cohort of Phase 1/2 ACHIEVE trial of z-basivarsen in DM1 on track for Q2 2026; global confirmatory Phase 3 HARMONIA trial initiated - - New preclinical data to be presented at ASGCT underscore differentiated capability of clinically validated FORCETM platform to cross the blood-brain barrier - WALTHAM, Mass., May 11, 2026 - Dyne Therapeutics, Inc. (Nasdaq: DYN), a clinical-stage company focused on delivering functional improvement for people living with genetically driven neuromuscular diseases, today reported financial results for the first quarter of 2026 and recent business highlights. “Following positive topline data late last year, we continue to ramp up activiti…

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