Notice of Proposed Sale · 144
Dyne Therapeutics, Inc.
DYNNASDAQEQUITYCurrent
Notice of Proposed Sale
Structured filing — 144
primary_doc.xml
Notice of proposed sale. The proposed amounts below do not establish that a sale occurred.
Proposed-sale notice
- Issuer
- Dyne Therapeutics, Inc.
- Issuer CIK
- 0001818794
- SEC file number
- 001-39509
- Phone
- (781) 786-8230
- Person for whose account securities are to be sold
- ForDyne B.V.
- Relationships to issuer
- Affiliate
- Street
- 1560 TRAPELO ROAD
- City
- WALTHAM
- State / country code
- MA
- Postal code
- 02451
Securities proposed for sale
| Security | Proposed units | Aggregate market value | Units outstanding | Approximate sale date | Exchange | Broker / market maker |
|---|---|---|---|---|---|---|
| Common | 261,460 | 6,670,759.71 | 165,313,796 | 07/27/2026 | Nasdaq | UBS Financial Services Inc. |
Broker / market maker — proposed row 1, entry 1
- Name
- UBS Financial Services Inc.
- Street
- 11 Madison Avenue
- Street (continued)
- 4th Floor
- City
- New York
- State / country code
- NY
- Postal code
- 10010
Acquisition of securities to be sold
| Security | Acquired | Nature of acquisition | Acquired from | Amount acquired | Gift transaction | Payment date | Nature of payment |
|---|---|---|---|---|---|---|---|
| Common | 09/17/2020 | IPO Conversion of Shares | Issuer | 261,460 | N | 09/17/2020 | N/A |
Sales reported in the preceding three months
| Seller | Security | Sale date | Amount sold | Gross proceeds |
|---|---|---|---|---|
| ForDyne B.V. | Common | 06/17/2026 | 37,454 | 754,316.07 |
| ForDyne B.V. | Common | 06/18/2026 | 46,901 | 941,373.42 |
| ForDyne B.V. | Common | 06/22/2026 | 190,676 | 3,922,262.52 |
| ForDyne | Common | 06/23/2026 | 73,286 | 1,542,347.84 |
Seller — prior-sale row 1, entry 1
- Name
- ForDyne B.V.
- Street
- 1560 TRAPELO ROAD
- City
- Waltham
- State / country code
- MA
- Postal code
- 02451
Seller — prior-sale row 2, entry 1
- Name
- ForDyne B.V.
- Street
- 1560 TRAPELO ROAD
- City
- Waltham
- State / country code
- MA
- Postal code
- 02451
Seller — prior-sale row 3, entry 1
- Name
- ForDyne B.V.
- Street
- 1560 TRAPELO ROAD
- City
- Waltham
- State / country code
- MA
- Postal code
- 02451
Seller — prior-sale row 4, entry 1
- Name
- ForDyne
- Street
- 1560 TRAPELO ROAD
- City
- Waltham
- State / country code
- MA
- Postal code
- 02451
Prior-sale reporting
- Nothing to report for the preceding three months
- N
Notice signature
- Notice date
- 07/27/2026
- Signed
- /s/ UBS Financial Services Inc, as attorney-in-fact for ForDyne B.V.
- Plan adoption dates
- 11/11/2025
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.