# EDGAR Filing Document

**Accession Number:** 0001818794
**File Stem:** 0001193125-26-084245
**Filing Date:** 2026-3
**Character Count:** 15267
**Document Hash:** e3ee7f29885377320df2c14644fc20d0
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-084245.hdr.sgml**: 20260302

**ACCESSION NUMBER**: 0001193125-26-084245

**CONFORMED SUBMISSION TYPE**: S-8

**PUBLIC DOCUMENT COUNT**: 16

**FILED AS OF DATE**: 20260302

**DATE AS OF CHANGE**: 20260302

**EFFECTIVENESS DATE**: 20260302

**FILER**: 

**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:** S-8
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-293908
- **FILM NUMBER:** 26703520

**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

**As filed with the Securities and Exchange Commission on March 2, 2026** 

**Registration No. 333-** 

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**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**Washington, D.C. 20549** 

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**FORM S-8** 

**REGISTRATION STATEMENT**

***UNDER THE SECURITIES ACT OF 1933***

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**Dyne Therapeutics, Inc.** 

**(Exact Name of Registrant as Specified in Its Charter)** 

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| | |
|:---|:---|
| **Delaware** | **36-4883909** |
| **(State or Other Jurisdiction of**<br>**Incorporation or Organization)** | **(I.R.S. Employer**<br>**Identification No.)** |
| **1560 Trapelo Road**<br>**Waltham, Massachusetts** | **02451** |
| **(Address of Principal Executive Offices)** | **(Zip Code)** |

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**2020 Stock Incentive Plan** 

**(Full Title of the Plan)** 

**John G. Cox**

**President and Chief Executive Officer** 

**1560 Trapelo Road**

**Waltham, Massachusetts 02451** 

**(Name and Address of Agent for Service)** 

**(781) 786-8230** 

**(Telephone Number, Including Area Code, of Agent for Service)** 

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Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act.

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| | | | |
|:---|:---|:---|:---|
| Large accelerated filer | ☒ | Accelerated filer | ☐ |
| Non-accelerated filer | ☐ | Smaller reporting company | ☐ |
|  |  | Emerging growth company | ☐ |

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If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐

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**EXPLANATORY NOTE**

This Registration Statement on Form S-8, relating to the 2020 Stock Incentive Plan (the "2020 Plan") of Dyne Therapeutics, Inc. (the "Registrant"), is being filed for the purpose of registering additional securities of the same class as other securities for which a Registration Statement on Form S-8 relating to the 2020 Plan has previously been filed and is effective. Pursuant to General Instruction E to Form S-8, except as otherwise set forth below, this Registration Statement incorporates by reference (i) the contents of the Registration Statement on [<u>Form S-8</u>](https://www.sec.gov/Archives/edgar/data/1818794/000119312520248107/d847575ds8.htm), File No. 333-248873, relating to the 2020 Plan filed by the Registrant with the Securities and Exchange Commission on September 17, 2020, (ii) the contents of the Registration Statement on [<u>Form S-8</u>](https://www.sec.gov/Archives/edgar/data/1818794/000119312521068485/d21724ds8.htm), File No. 333-253863, relating to the 2020 Plan filed by the Registrant with the Securities and Exchange Commission on March 4, 2021, (iii) the contents of the Registration Statement on [<u>Form S-8</u>](https://www.sec.gov/Archives/edgar/data/1818794/000156459022009478/dyn-s8.htm), File No. 333-263409, relating to the 2020 Plan filed by the Registrant with the Securities and Exchange Commission on March 10, 2022, (iv) the contents of the Registration Statement on [<u>Form S-8</u>](https://www.sec.gov/Archives/edgar/data/1818794/000095017023005712/2023_s-8.htm), File No. 333-270206, relating to the 2020 Plan filed by the Registrant with the Securities and Exchange Commission on March 2, 2023, (v) the contents of the Registration Statement on [<u>Form S-8</u>](https://www.sec.gov/Archives/edgar/data/1818794/000095017024025404/2024_s-8.htm), File No. 333-277654, relating to the 2020 Plan filed by the Registrant with the Securities and Exchange Commission on March 5, 2024 and (vi) the contents of the Registration Statement on [<u>Form S-8</u>](https://www.sec.gov/Archives/edgar/data/1818794/000095017025028360/dyn-20250226.htm), File No. 333-285305, relating to the 2020 Plan filed by the Registrant with the Securities and Exchange commission on February 27, 2025.

**Item 8. Exhibits.** 

The following exhibits are incorporated herein by reference:

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| | |
|:---|:---|
| **Number** | **Description** |
| 4.1 | [<u>Restated Certificate of Incorporation of the Registrant (incorporated by reference to Exhibit 3.1 to the Registrant's Current Report on Form 8-K, filed with the Securities and Exchange Commission on September 21, 2020).</u>](https://www.sec.gov/Archives/edgar/data/1818794/000119312520250237/d122515dex31.htm) |
| 4.2 | [<u>Amended and Restated Bylaws of the Registrant (incorporated by reference to Exhibit 3.2 of the Registrant's Form 10-K, filed with the Securities and Exchange Commission on March 2, 2023).</u>](https://www.sec.gov/Archives/edgar/data/1818794/000095017023005708/dyn-ex3_2.htm) |
| 5.1\* | [<u>Opinion of Wilmer Cutler Pickering Hale and Dorr LLP, counsel to the Registrant.</u>](dyn-ex5_1.htm) |
| 23.1\* | [<u>Consent of Deloitte & Touche LLP, independent registered public accounting firm.</u>](dyn-ex23_1.htm) |
| 23.2\* | [<u>Consent of Wilmer Cutler Pickering Hale and Dorr LLP (included in Exhibit 5.1).</u>](dyn-ex5_1.htm) |
| 24.1\* | [<u>Power of attorney (included on the signature pages of this registration statement).</u>](#signatures) |
| 99.1 | [<u>2020 Stock Incentive Plan (incorporated by reference to Exhibit 10.4 to Amendment No. 1 to the Registrant's Registration Statement on Form S-1 (File No. 333-248414) filed with the Securities and Exchange Commission on September 10, 2020).</u>](https://www.sec.gov/Archives/edgar/data/1818794/000119312520242598/d920854dex104.htm) |
| 107\* | [<u>Filing Fees Table</u>](dyn_exfilingfees.htm) |

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\* Filed herewith

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**SIGNATURES**

Pursuant to the requirements of the Securities Act of 1933, the registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Waltham, Commonwealth of Massachusetts on this 2nd day of March, 2026.

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| | |
|:---|:---|
| DYNE THERAPEUTICS, INC. | DYNE THERAPEUTICS, INC. |
| By: | /s/ John G. Cox |
|  | John G. Cox |
|  | President and Chief Executive Officer |

---

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**POWER OF ATTORNEY AND SIGNATURES** 

We, the undersigned officers and directors of Dyne Therapeutics, Inc., hereby severally constitute and appoint John G. Cox and Erick Lucera, and each of them singly (with full power to each of them to act alone), our true and lawful attorneys with full power of substitution and resubstitution in each of them for him or her and in his or her name, place and stead, and in any and all capacities, to sign for us and in our names in the capacities indicated below, the registration statement on Form S-8 filed herewith and any and all subsequent amendments to said registration statement, and generally to do all such things in our names and on our behalf in our capacities as officers and directors to enable Dyne Therapeutics, Inc. to comply with the provisions of the Securities Act of 1933, as amended, and all requirements of the Securities and Exchange Commission, hereby ratifying and confirming our signatures as they may be signed by our said attorneys, or any of them, to said registration statement and any and all amendments thereto.

Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed by the following persons in the capacities and on the dates indicated.

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| | | |
|:---|:---|:---|
| **Name** | **Title** | **Date** |
| /s/ John G. Cox | President, Chief Executive Officer and Director (principal executive officer) | March 2, 2026 |
| John G. Cox |  |  |
| /s/ Erick Lucera | Chief Financial Officer and Treasurer (principal financial and accounting officer) | March 2, 2026 |
| Erick Lucera |  |  |
| /s/ Jason Rhodes | Director and Chairman of the Board | March 2, 2026 |
| Jason Rhodes |  |  |
| /s/ Ed Hurwitz | Director | March 2, 2026 |
| Ed Hurwitz |  |  |
| /s/ Carlo Incerti, M.D. | Director | March 2, 2026 |
| Carlo Incerti, M.D. |  |  |
| /s/ Vikram Karnani | Director | March 2, 2026 |
| Vikram Karnani |  |  |
| /s/ Dirk Kersten | Director | March 2, 2026 |
| Dirk Kersten |  |  |
| /s/ David Lubner | Director | March 2, 2026 |
| David Lubner |  |  |
| /s/ Brian Posner | Director | March 2, 2026 |
| Brian Posner |  |  |
| /s/ Catherine Stehman-Breen, M.D. | Director | March 2, 2026 |
| Catherine Stehman-Breen, M.D. |  |  |

---

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## Exhibit 5.1

**Exhibit 5.1**

![img40885939_0.jpg](img40885939_0.jpg)

+1 617 526 6000 (t)

+1 617 526 5000 (f)

wilmerhale.com

March 2, 2026

Dyne Therapeutics, Inc.

1560 Trapelo Road

Waltham, MA 02451

Re: Registration Statement on Form S-8

2020 Stock Incentive Plan

Ladies and Gentlemen:

We have assisted in the preparation of a Registration Statement on Form S-8 (the "Registration Statement") to be filed with the Securities and Exchange Commission (the "Commission") under the Securities Act of 1933, as amended (the "Securities Act"), relating to an aggregate of 8,247,527 additional shares of common stock, $0.0001 par value per share (the "Shares"), of Dyne Therapeutics, Inc., a Delaware corporation (the "Company"), issuable under the Company's 2020 Stock Incentive Plan (the "Plan").

We have examined the Certificate of Incorporation and Bylaws of the Company, each as amended and/or restated to date, and originals, or copies certified to our satisfaction, of all pertinent records of the meetings of the board of directors and stockholders of the Company, the Registration Statement, the Plan and such other documents relating to the Company as we have deemed material for the purposes of this opinion.

In our examination of the foregoing documents, we have assumed the genuineness of all signatures, the authenticity of all documents submitted to us as originals, the conformity to original documents of all documents submitted to us as certified, photostatic or other copies, the authenticity of the originals of any such documents and the legal competence of all signatories to such documents.

We assume that the appropriate action will be taken, prior to the offer and sale of the Shares in accordance with the Plan, to register and qualify the Shares for sale under all applicable state securities or "blue sky" laws.

We express no opinion herein as to the laws of any state or jurisdiction other than the General Corporation Law of the State of Delaware.

It is understood that this opinion is to be used only in connection with the offer and sale of the Shares while the Registration Statement is in effect.

Please note that we are opining only as to the matters expressly set forth herein, and no opinion should be inferred as to any other matters.

&nbsp;&nbsp;![img40885939_1.jpg](img40885939_1.jpg)<br>

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Dyne Therapeutics, Inc.

March 2, 2026

Based on the foregoing, we are of the opinion that the Shares have been duly authorized for issuance and, when the Shares are issued and paid for in accordance with the terms and conditions of the Plan, the Shares will be validly issued, fully paid and nonassessable.

We hereby consent to the filing of this opinion with the Commission in connection with the Registration Statement in accordance with the requirements of Item 601(b)(5) of Regulation S-K under the Securities Act. In giving such consent, we do not hereby admit that we are in the category of persons whose consent is required under Section 7 of the Securities Act or the rules and regulations of the Commission.

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| | |
|:---|:---|
| Very truly yours, | Very truly yours, |
| By: | /s/ Wilmer Cutler Pickering Hale and Dorr LLP |
|  | WILMER CUTLER PICKERING HALE AND DORR LLP |

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## Exhibit 23.1

**Exhibit 23.1**

**CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM**

We consent to the incorporation by reference in this Registration Statement on Form S-8 of our reports dated March 2, 2026, relating to the financial statements of Dyne Therapeutics, Inc. and the effectiveness of Dyne Therapeutics, Inc.'s internal control over financial reporting, appearing in the Annual Report on Form 10-K of Dyne Therapeutics, Inc. for the year ended December 31, 2025.

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| |
|:---|
| /s/ Deloitte & Touche LLP |
| Boston, Massachusetts |
| March 2, 2026 |

---

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## Ex-Filing

?xml version='1.0' encoding='ASCII'? EX-FILING FEES

**Exhibit 107**

Calculation of Filing Fee Tables

**Form** S-8

(Form Type)

Dyne Therapeutics, Inc.

(Exact Name of Registrant as Specified in its Charter)

<u>Table 1: Newly Registered Securities</u>

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| | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|
| Security Type | **Security Class Title** | **Fee Calculation Rule** | **Amount Registered(1)** | **Proposed Maximum Offering Price Per Unit** | **Maximum Aggregate Offering Price** | **Fee Rate** | **Amount of Registration Fee** |
| Equity | Common stock, par value $0.0001 per share | Other(2) | 8247527(3) | 15.15(2) | 124950034.05 | 0.0001381 | $17255.60 |
| **Total Offering Amounts** | **Total Offering Amounts** | **Total Offering Amounts** | **Total Offering Amounts** |  | 124950034.05 |  | $17255.60 |
| **Total Fee Offsets** | **Total Fee Offsets** | **Total Fee Offsets** | **Total Fee Offsets** |  |  |  | - |
| **Net Fee Due** | **Net Fee Due** | **Net Fee Due** | **Net Fee Due** |  |  |  | $17255.60 |

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(1) In accordance with Rule 416 under the Securities Act of 1933, as amended (the "Securities Act"), this registration statement shall be deemed to cover any additional securities that may from time to time be offered or issued to prevent dilution resulting from stock splits, stock dividends or similar transactions.

(2) Estimated solely for the purpose of calculating the registration fee pursuant to Rules 457(c) and 457(h) of the Securities Act and based upon the average of the high and low sales price of the registrant's common stock on the Nasdaq Global Select Market on February 23, 2026.

(3) Consists of 8,247,527 additional shares issuable under the 2020 Stock Incentive Plan.

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