Dyne Therapeutics, Inc. (DYN) Insider Trading
Directors, officers and holders of more than 10% of DYN report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.
Recent Form 4 transactions
The 50 most recent of 276 transactions on file: 1 with code P, 46 with code S and 3 with other codes.
| Date | Insider | Title | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 20, 2026 | Kerr Douglas | Head of R&D and CMO | A Award | 12,000 | Not measured | Not measured |
| Oct 20, 2026 | Kerr Douglas | Head of R&D and CMO | A Award | 8,000 | Not measured | Not measured |
| Oct 2, 2026 | Posner Brian S | Director | P Purchase | 2,500 | $16.00 | $40,000 |
| Sep 8, 2026 | Kerr Douglas | Head of R&D and CMO | S Sale | 1,290 | $18.88 | $24,355 |
| Sep 8, 2026 | Cox John | CEO & President | S Sale | 5,658 | $18.88 | $106,823 |
| Sep 8, 2026 | Friedl-Naderer Johanna | Chief Commercial Officer | S Sale | 185 | $18.88 | $3,493 |
| Sep 4, 2026 | Friedl-Naderer Johanna | Chief Commercial Officer | S Sale | 900 | $24.35 | $21,915 |
| Sep 4, 2026 | Kerr Douglas | Head of R&D and CMO | S Sale | 3,745 | $24.35 | $91,191 |
| Aug 14, 2026 | Rhodes Jason P | Director | S Sale | 478,377 | $25.00 | $11,959,425 |
| Aug 14, 2026 | Rhodes Jason P | Director | S Sale | 1,359,674 | $25.00 | $33,991,850 |
| Aug 14, 2026 | Rhodes Jason P | Director | S Sale | 322,465 | $25.00 | $8,061,625 |
| Aug 13, 2026 | Kerr Douglas | Head of R&D and CMO | S Sale | 1,556 | $26.28 | $40,892 |
| Aug 13, 2026 | Rhodes Jason P | Director | S Sale | 94,415 | $26.20 | $2,473,673 |
| Aug 13, 2026 | Rhodes Jason P | Director | S Sale | 63,643 | $26.20 | $1,667,447 |
| Aug 13, 2026 | Friedl-Naderer Johanna | Chief Commercial Officer | S Sale | 226 | $26.28 | $5,939 |
| Aug 13, 2026 | Cox John | CEO & President | S Sale | 4,986 | $26.28 | $131,032 |
| Aug 13, 2026 | Lucera Erick | Chief Financial Officer | S Sale | 1,797 | $26.28 | $47,225 |
| Aug 13, 2026 | Rhodes Jason P | Director | S Sale | 268,354 | $26.20 | $7,030,875 |
| Jul 27, 2026 | Kersten Dirk | Director | S Sale | 256,072 | $25.50 | $6,530,451 |
| Jul 27, 2026 | Kersten Dirk | Director | S Sale | 5,388 | $26.04 | $140,319 |
| Jul 7, 2026 | Rhodes Jason P | Director | S Sale | 11,665 | $23.62 | $275,527 |
| Jul 7, 2026 | Rhodes Jason P | Director | S Sale | 124,379 | $23.17 | $2,881,861 |
| Jul 7, 2026 | Rhodes Jason P | Director | S Sale | 62,543 | $23.17 | $1,449,121 |
| Jul 7, 2026 | Rhodes Jason P | Director | S Sale | 5,000 | $23.61 | $118,050 |
| Jul 7, 2026 | Rhodes Jason P | Director | S Sale | 14,844 | $23.62 | $350,615 |
| Jul 7, 2026 | Rhodes Jason P | Director | S Sale | 29,587 | $23.62 | $698,845 |
| Jul 7, 2026 | Rhodes Jason P | Director | S Sale | 49,193 | $23.17 | $1,139,802 |
| Jul 6, 2026 | Rhodes Jason P | Director | S Sale | 253,039 | $22.79 | $5,766,759 |
| Jul 6, 2026 | Rhodes Jason P | Director | S Sale | 127,182 | $22.79 | $2,898,478 |
| Jul 6, 2026 | Rhodes Jason P | Director | S Sale | 100,019 | $22.79 | $2,279,433 |
| Jun 29, 2026 | Rhodes Jason P | Director | S Sale | 40,702 | $21.14 | $860,440 |
| Jun 29, 2026 | Rhodes Jason P | Director | S Sale | 51,756 | $21.14 | $1,094,122 |
| Jun 29, 2026 | Rhodes Jason P | Director | S Sale | 102,969 | $21.14 | $2,176,765 |
| Jun 26, 2026 | Rhodes Jason P | Director | S Sale | 64,411 | $21.28 | $1,370,666 |
| Jun 26, 2026 | Rhodes Jason P | Director | S Sale | 81,903 | $21.28 | $1,742,896 |
| Jun 26, 2026 | Rhodes Jason P | Director | S Sale | 162,954 | $21.28 | $3,467,661 |
| Jun 25, 2026 | Rhodes Jason P | Director | S Sale | 5,019 | $21.10 | $105,901 |
| Jun 25, 2026 | Rhodes Jason P | Director | S Sale | 6,382 | $21.10 | $134,660 |
| Jun 25, 2026 | Rhodes Jason P | Director | S Sale | 12,699 | $21.10 | $267,949 |
| Jun 25, 2026 | Lucera Erick | Chief Financial Officer | S Sale | 2,362 | $20.37 | $48,114 |
| Jun 24, 2026 | Rhodes Jason P | Director | S Sale | 19,973 | $21.02 | $419,832 |
| Jun 24, 2026 | Rhodes Jason P | Director | S Sale | 25,397 | $21.02 | $533,845 |
| Jun 24, 2026 | Rhodes Jason P | Director | S Sale | 50,530 | $21.02 | $1,062,141 |
| Jun 23, 2026 | Rhodes Jason P | Director | S Sale | 30,774 | $21.13 | $650,255 |
| Jun 23, 2026 | Kersten Dirk | Director | S Sale | 71,629 | $21.04 | $1,506,766 |
| Jun 23, 2026 | Rhodes Jason P | Director | S Sale | 39,131 | $21.13 | $826,838 |
| Jun 23, 2026 | Rhodes Jason P | Director | S Sale | 77,855 | $21.13 | $1,645,076 |
| Jun 23, 2026 | Kersten Dirk | Director | S Sale | 1,657 | $21.47 | $35,583 |
| Jun 22, 2026 | Kersten Dirk | Director | S Sale | 190,676 | $20.57 | $3,922,263 |
| Jun 22, 2026 | Greene Barry E | Director | A Award | 57,463 | Not measured | Not measured |
The full Form 4 history is on the DYN company page (Insider Trades card, View all).
Questions about this data
Which insider transactions are open-market trades?
Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.
How quickly are insider trades reported?
A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.
Who has to file Form 4?
Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.
Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.