DYNE THERAPEUTICS INC (DYN) — insider trading
Health Care · NASDAQ
DYNE THERAPEUTICS INC (DYN) has 118 reported SEC Form 4 insider transactions in our data, including 4 open-market purchases and 87 open-market sales among the most recent 100 (latest 2026-08-14).
Recent Form 4 transactions
Showing the 100 most recent of 118 recorded transactions. See all on SEC EDGAR →
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-08-14 | Rhodes Jason P | Director | Open-market sale | 322,465 | $25.00 | $8.06M | Form 4 |
| 2026-08-14 | Rhodes Jason P | Director | Open-market sale | 478,377 | $25.00 | $11.96M | Form 4 |
| 2026-08-14 | Rhodes Jason P | Director | Open-market sale | 1,359,674 | $25.00 | $33.99M | Form 4 |
| 2026-08-13 | Lucera Erick | Officer (Chief Financial Officer) | Open-market sale | 1,797 | $26.28 | $47.2K | Form 4 |
| 2026-08-13 | Cox John | Director, Officer (CEO & President) | Open-market sale | 4,986 | $26.28 | $131.0K | Form 4 |
| 2026-08-13 | Kerr Douglas | Officer (Chief Medical Officer) | Open-market sale | 1,556 | $26.28 | $40.9K | Form 4 |
| 2026-08-13 | Friedl-Naderer Johanna | Officer (Chief Commercial Officer) | Open-market sale | 226 | $26.28 | $5.9K | Form 4 |
| 2026-08-13 | Rhodes Jason P | Director | Open-market sale | 63,643 | $26.20 | $1.67M | Form 4 |
| 2026-08-13 | Rhodes Jason P | Director | Open-market sale | 94,415 | $26.20 | $2.47M | Form 4 |
| 2026-08-13 | Rhodes Jason P | Director | Open-market sale | 268,354 | $26.20 | $7.03M | Form 4 |
| 2026-07-27 | Kersten Dirk | Director | Open-market sale | 5,388 | $26.04 | $140.3K | Form 4 |
| 2026-07-27 | Kersten Dirk | Director | Open-market sale | 256,072 | $25.50 | $6.53M | Form 4 |
| 2026-07-07 | Rhodes Jason P | Director | Open-market sale | 5,000 | $23.61 | $118.0K | Form 4 |
| 2026-07-07 | Rhodes Jason P | Director | Open-market sale | 11,665 | $23.62 | $275.5K | Form 4 |
| 2026-07-07 | Rhodes Jason P | Director | Open-market sale | 49,193 | $23.17 | $1.14M | Form 4 |
| 2026-07-07 | Rhodes Jason P | Director | Open-market sale | 14,844 | $23.62 | $350.6K | Form 4 |
| 2026-07-07 | Rhodes Jason P | Director | Open-market sale | 62,543 | $23.17 | $1.45M | Form 4 |
| 2026-07-07 | Rhodes Jason P | Director | Open-market sale | 29,587 | $23.62 | $698.8K | Form 4 |
| 2026-07-07 | Rhodes Jason P | Director | Open-market sale | 124,379 | $23.17 | $2.88M | Form 4 |
| 2026-07-06 | Rhodes Jason P | Director | Open-market sale | 100,019 | $22.79 | $2.28M | Form 4 |
| 2026-07-06 | Rhodes Jason P | Director | Open-market sale | 127,182 | $22.79 | $2.90M | Form 4 |
| 2026-07-06 | Rhodes Jason P | Director | Open-market sale | 253,039 | $22.79 | $5.77M | Form 4 |
| 2026-06-29 | Rhodes Jason P | Director | Open-market sale | 40,702 | $21.14 | $860.4K | Form 4 |
| 2026-06-29 | Rhodes Jason P | Director | Open-market sale | 51,756 | $21.14 | $1.09M | Form 4 |
| 2026-06-29 | Rhodes Jason P | Director | Open-market sale | 102,969 | $21.14 | $2.18M | Form 4 |
| 2026-06-26 | Rhodes Jason P | Director | Open-market sale | 64,411 | $21.28 | $1.37M | Form 4 |
| 2026-06-26 | Rhodes Jason P | Director | Open-market sale | 81,903 | $21.28 | $1.74M | Form 4 |
| 2026-06-26 | Rhodes Jason P | Director | Open-market sale | 162,954 | $21.28 | $3.47M | Form 4 |
| 2026-06-25 | Rhodes Jason P | Director | Open-market sale | 5,019 | $21.10 | $105.9K | Form 4 |
| 2026-06-25 | Rhodes Jason P | Director | Open-market sale | 6,382 | $21.10 | $134.7K | Form 4 |
| 2026-06-25 | Rhodes Jason P | Director | Open-market sale | 12,699 | $21.10 | $267.9K | Form 4 |
| 2026-06-25 | Lucera Erick | Officer (Chief Financial Officer) | Open-market sale | 2,362 | $20.37 | $48.1K | Form 4 |
| 2026-06-24 | Rhodes Jason P | Director | Open-market sale | 19,973 | $21.02 | $419.8K | Form 4 |
| 2026-06-24 | Rhodes Jason P | Director | Open-market sale | 25,397 | $21.02 | $533.8K | Form 4 |
| 2026-06-24 | Rhodes Jason P | Director | Open-market sale | 50,530 | $21.02 | $1.06M | Form 4 |
| 2026-06-23 | Rhodes Jason P | Director | Open-market sale | 30,774 | $21.13 | $650.3K | Form 4 |
| 2026-06-23 | Rhodes Jason P | Director | Open-market sale | 39,131 | $21.13 | $826.8K | Form 4 |
| 2026-06-23 | Rhodes Jason P | Director | Open-market sale | 77,855 | $21.13 | $1.65M | Form 4 |
| 2026-06-23 | Kersten Dirk | Director | Open-market sale | 1,657 | $21.47 | $35.6K | Form 4 |
| 2026-06-23 | Kersten Dirk | Director | Open-market sale | 71,629 | $21.04 | $1.51M | Form 4 |
| 2026-06-22 | Kersten Dirk | Director | Open-market sale | 190,676 | $20.57 | $3.92M | Form 4 |
| 2026-06-22 | Greene Barry E | Director | Grant / award / vesting (derivative) | 57,463 | — | $0 | Form 4 |
| 2026-06-18 | Kersten Dirk | Director | Open-market sale | 46,901 | $20.07 | $941.4K | Form 4 |
| 2026-06-17 | Kersten Dirk | Director | Open-market sale | 37,454 | $20.14 | $754.3K | Form 4 |
| 2026-06-16 | Cox John | Director, Officer (CEO & President) | Open-market sale | 2,683 | $18.33 | $49.2K | Form 4 |
| 2026-06-16 | Friedl-Naderer Johanna | Officer (Chief Commercial Officer) | Open-market sale | 145 | $18.33 | $2.7K | Form 4 |
| 2026-06-16 | Kerr Douglas | Officer (Chief Medical Officer) | Open-market sale | 887 | $18.33 | $16.3K | Form 4 |
| 2026-06-08 | Posner Brian S | Director | Open-market purchase | 2,000 | $16.94 | $33.9K | Form 4 |
| 2026-06-05 | Posner Brian S | Director | Grant / award / vesting (derivative) | 35,152 | — | $0 | Form 4 |
| 2026-06-05 | Stehman-Breen Catherine | Director | Grant / award / vesting (derivative) | 35,152 | — | $0 | Form 4 |
| 2026-06-05 | Incerti Carlo | Director | Grant / award / vesting (derivative) | 35,152 | — | $0 | Form 4 |
| 2026-06-05 | Kersten Dirk | Director | Grant / award / vesting (derivative) | 35,152 | — | $0 | Form 4 |
| 2026-06-05 | Rhodes Jason P | Director | Grant / award / vesting (derivative) | 35,152 | — | $0 | Form 4 |
| 2026-06-05 | Lubner David Charles | Director | Grant / award / vesting (derivative) | 35,152 | — | $0 | Form 4 |
| 2026-06-05 | HURWITZ EDWARD | Director | Grant / award / vesting (derivative) | 35,152 | — | $0 | Form 4 |
| 2026-06-03 | Posner Brian S | Director | Open-market purchase | 2,500 | $17.48 | $43.7K | Form 4 |
| 2026-05-26 | Posner Brian S | Director | Open-market purchase | 2,000 | $18.21 | $36.4K | Form 4 |
| 2026-05-20 | Posner Brian S | Director | Open-market purchase | 2,500 | $17.12 | $42.8K | Form 4 |
| 2026-05-13 | Cox John | Director, Officer (CEO & President) | Open-market sale | 3,311 | $18.36 | $60.8K | Form 4 |
| 2026-05-13 | Lucera Erick | Officer (Chief Financial Officer) | Open-market sale | 1,448 | $18.36 | $26.6K | Form 4 |
| 2026-05-13 | Kerr Douglas | Officer (Chief Medical Officer) | Open-market sale | 1,564 | $18.36 | $28.7K | Form 4 |
| 2026-05-13 | Friedl-Naderer Johanna | Officer (Chief Commercial Officer) | Open-market sale | 228 | $18.36 | $4.2K | Form 4 |
| 2026-05-06 | Rhodes Jason P | Director | Open-market sale | 17,244 | $18.18 | $313.5K | Form 4 |
| 2026-05-06 | Rhodes Jason P | Director | Open-market sale | 428 | $18.18 | $7.8K | Form 4 |
| 2026-05-06 | Rhodes Jason P | Director | Open-market sale | 43,621 | $18.18 | $793.0K | Form 4 |
| 2026-05-06 | Rhodes Jason P | Director | Open-market sale | 21,926 | $18.18 | $398.6K | Form 4 |
| 2026-05-05 | Rhodes Jason P | Director | Open-market sale | 2,403 | $18.03 | $43.3K | Form 4 |
| 2026-05-05 | Rhodes Jason P | Director | Open-market sale | 60 | $18.03 | $1.1K | Form 4 |
| 2026-05-05 | Rhodes Jason P | Director | Open-market sale | 6,081 | $18.03 | $109.6K | Form 4 |
| 2026-05-05 | Rhodes Jason P | Director | Open-market sale | 3,056 | $18.03 | $55.1K | Form 4 |
| 2026-05-04 | Rhodes Jason P | Director | Open-market sale | 2,466 | $18.00 | $44.4K | Form 4 |
| 2026-05-04 | Rhodes Jason P | Director | Open-market sale | 61 | $18.00 | $1.1K | Form 4 |
| 2026-05-04 | Rhodes Jason P | Director | Open-market sale | 6,241 | $18.00 | $112.3K | Form 4 |
| 2026-05-04 | Rhodes Jason P | Director | Open-market sale | 3,136 | $18.00 | $56.4K | Form 4 |
| 2026-04-28 | Rhodes Jason P | Director | Open-market sale | 21 | $19.00 | $399 | Form 4 |
| 2026-04-28 | Rhodes Jason P | Director | Open-market sale | 1 | $19.00 | $19 | Form 4 |
| 2026-04-28 | Rhodes Jason P | Director | Open-market sale | 52 | $19.00 | $988 | Form 4 |
| 2026-04-28 | Rhodes Jason P | Director | Open-market sale | 26 | $19.00 | $494 | Form 4 |
| 2026-04-28 | Rhodes Jason P | Director | Open-market sale | 47,082 | $18.38 | $865.4K | Form 4 |
| 2026-04-28 | Rhodes Jason P | Director | Open-market sale | 1,170 | $18.38 | $21.5K | Form 4 |
| 2026-04-28 | Rhodes Jason P | Director | Open-market sale | 119,115 | $18.38 | $2.19M | Form 4 |
| 2026-04-28 | Rhodes Jason P | Director | Open-market sale | 59,870 | $18.38 | $1.10M | Form 4 |
| 2026-04-27 | Rhodes Jason P | Director | Open-market sale | 35,947 | $18.15 | $652.4K | Form 4 |
| 2026-04-27 | Rhodes Jason P | Director | Open-market sale | 894 | $18.15 | $16.2K | Form 4 |
| 2026-04-27 | Rhodes Jason P | Director | Open-market sale | 90,943 | $18.15 | $1.65M | Form 4 |
| 2026-04-27 | Rhodes Jason P | Director | Open-market sale | 45,709 | $18.15 | $829.6K | Form 4 |
| 2026-04-24 | Lubner David Charles | Director | Bona fide gift | 53,625 | — | $0 | Form 4 |
| 2026-04-24 | Rhodes Jason P | Director | Open-market sale | 28,583 | $18.48 | $528.2K | Form 4 |
| 2026-04-24 | Rhodes Jason P | Director | Open-market sale | 710 | $18.48 | $13.1K | Form 4 |
| 2026-04-24 | Rhodes Jason P | Director | Open-market sale | 72,310 | $18.48 | $1.34M | Form 4 |
| 2026-04-24 | Rhodes Jason P | Director | Open-market sale | 36,345 | $18.48 | $671.7K | Form 4 |
| 2026-04-23 | Rhodes Jason P | Director | Open-market sale | 15,148 | $19.19 | $290.7K | Form 4 |
| 2026-04-23 | Rhodes Jason P | Director | Open-market sale | 377 | $19.19 | $7.2K | Form 4 |
| 2026-04-23 | Rhodes Jason P | Director | Open-market sale | 38,322 | $19.19 | $735.4K | Form 4 |
| 2026-04-23 | Rhodes Jason P | Director | Open-market sale | 19,261 | $19.19 | $369.6K | Form 4 |
| 2026-04-22 | Kersten Dirk | Director | Open-market sale | 2,652 | $20.00 | $53.0K | Form 4 |
| 2026-04-22 | Rhodes Jason P | Director | Open-market sale | 59,663 | $19.68 | $1.17M | Form 4 |
| 2026-04-22 | Rhodes Jason P | Director | Open-market sale | 1,485 | $19.68 | $29.2K | Form 4 |
| 2026-04-22 | Rhodes Jason P | Director | Open-market sale | 150,942 | $19.68 | $2.97M | Form 4 |
| 2026-04-22 | Rhodes Jason P | Director | Open-market sale | 75,866 | $19.68 | $1.49M | Form 4 |
Ask the chat about DYN's insider activity →
Transaction types are the SEC Form 4 codes: open-market purchases (P) and sales (S) are the only rows that reflect open-market conviction. Awards/vesting (A), option exercises (M/X/C), shares withheld for taxes (F) and gifts (G) are compensation or mechanical, not buying or selling on the open market. Sales may be planned and non-discretionary (e.g. a Rule 10b5-1 plan); open-market buying is not a recommendation to buy. Informational only — not financial advice.
Source: SEC EDGAR Form 3/4/5. See the full company profile: DYNE THERAPEUTICS INC (DYN).
Last updated 2026-08-14 (most recent filing date).
Informational only — NOT financial advice. Insider filings are sourced from SEC EDGAR and shown with their reported dates.