Join Dyne Therapeutics, Inc. Class Action Lawsuit: DYN Lawsuit Sign Up Form

Company: Dyne Therapeutics, Inc.

Ticker: (NASDAQ) DYN

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Certification of Plaintiff Pursuant to Federal Securities Laws

I, duly certify and say, as to the claims asserted under the federal securities laws, that:

1. I have reviewed a complaint filed in the action.

2. I did not purchase the security that is the subject of this action at the direction of plaintiff's counsel or in order to participate in this action.

3. I am willing to serve as a representative party on behalf of the class, including providing testimony at deposition and trial, if necessary.

4. My transaction(s) in Dyne Therapeutics, Inc. which are the subject of this litigation during the class period set forth in the complaint are set forth in the chart attached hereto.

5. Within the last 3 years,

I have not sought to serve nor have I served as a class representative in any federal securities fraud case.
I have sought to serve as a class representative in

6. I will not accept any payment for serving as a representative party on behalf of the class beyond the Plaintiff's pro rata share of any recovery, except as ordered or approved by the court, including any award for reasonable costs and expenses (including lost wages) directly relating to the representation of the class.

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Yes. I certify under penalty of perjury that the foregoing is true and correct. Executed this
No. I certify under penalty of perjury under the laws of the United States of America that the foregoing is true and correct. Executed this

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Signed pursuant to California Civil Code Section 1633.1, et seq. - and the Uniform Electronic Transactions Act as adopted by the various states and territories of the United States.

By your signature above, you confirm that have retained Levi & Korsinsky, LLP to represent you and the shareholder class as a lead plaintiff in the pending class action against Dyne Therapeutics, Inc. This representation will be on a contingency basis, meaning that Levi & Korsinsky will advance all expenses in the litigation and will only seek compensation and/or reimbursement of expenses if the firm obtains a recovery. Regardless of the result, we will never ask you to directly pay for any attorneys’ fees, expenses, or costs. Should we obtain a favorable result, we may ask the court to award us compensation and reimbursement of expenses to be paid by the defendants or as a portion of any class recovery. In exchange for our representation, you agree to cooperate as our client by providing, for example, relevant documents and deposition testimony, if necessary. During the course of this litigation, we may employ and/or work with other law firms, experts, and third-parties to successfully prosecute this action. If you are not appointed as the lead plaintiff or Levi & Korsinsky is not appointed as lead counsel, we will notify you of such decision at which time this representation will end unless otherwise extended by you and the firm. We look forward to working with you towards a successful resolution of this action.

I have reviewed the complaint linked in paragraph 1

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Investigation Details

Dyne Therapeutics issued a press release on June 17, 2025, indicating a delay in filing for U.S. Food and Drug Administration (“FDA”) approval of DYNE-101, an experimental therapy for myotonic dystrophy type 1 (“DM1”). Following a Type C meeting with the FDA’s Center for Drug Evaluation and Research in May, the Company agreed to a revised protocol for its Phase 1/2 global ACHIEVE trial for DYNE-101 in DM1, then submitted the revised protocol to the FDA in June, incorporating changes to ACHIEVE’s ongoing Registrational Expansion Cohort. Dyne had previously set a goal to complete enrollments in the cohort in mid-2025 before generating data and submitting the regulatory submission in the first half of 2026. Under its revised schedule, however, Dyne intends to complete enrollment in the cohort in the fourth quarter of 2025, seeking a data readout in mid-2026 and a potential Accelerated Approval submission in late 2026.

Following this news, Dyne’s stock price fell over 21% on June 17, 2025.