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$DYN All transactions

Dyne Therapeutics, Inc.

G

$ Value

$0

Shares

10,000

Price

$0

Filed

Jul 15

Insider

Name

Cox John

Title

CEO & President

CIK

0001498428

Roles

Director Officer

Transaction Details

Transaction Date

2025-07-15

Code

G

Table

Non-Derivative

Ownership

Direct

Equity Swap

No

Shares After

232,179

Footnotes

The Reporting Person's purchase of shares of Common Stock reported herein was matchable under Section 16(b) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), to the extent of 8,121 shares, with the Reporting Person's sale of 4,061 shares on March 5, 2025 and 4,060 shares on June 5, 2025 automatically sold by the Reporting Person to satisfy tax withholding obligations in connection with the vesting of restricted stock units granted to the Reporting Person on December 4, 2024. The Reporting Person has paid to the Issuer an aggregate amount of $29,017.22, representing the amount of the profit deemed realized in connection with the short-swing transaction under Section 16(b) of the Exchange Act. | The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices within the range of $9.02 to $9.15, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote of this Form 4. | This transaction represents a gift by the Reporting Person to a trust established for the benefit of a child of the Reporting Person. | These shares of Common Stock are held in a trust for the benefit of a child of the Reporting Person. | Includes 127,138 unvested RSUs.

Filing Info

Accession No.

0000950170-25-095929

Form Type

4

Issuer CIK

0001818794

Cox John's History

Date Ticker Type Value
2026-03-05 DYN $41K
2026-02-12 DYN A $0
2026-02-12 DYN A $0
2025-12-05 DYN $55K
2025-09-05 DYN $35K
2025-07-16 DYN A $0
2025-07-15 DYN G $0
2025-07-15 DYN G $0
2025-07-15 DYN G $0
2025-07-15 DYN G $0

Other Insiders at DYN (90d)

Insider Bought Sold Last
Posner Brian S $118K 2026-03-30
Cox John
CEO & President
$41K 2026-03-05
Rhodes Jason P $16.5M 2026-04-22
Lucera Erick
Chief Financial Officer
$107K 2026-04-01
Kerr Douglas
Chief Medical Officer
$13K 2026-03-05
Kersten Dirk $24.7M 2026-04-22
Friedl-Naderer Johanna
Chief Commercial Officer
$2K 2026-03-05