As of the latest Form 4 filed Jul 8, 2026.
What Dyne Therapeutics Inc insiders — officers, directors and 10% owners — have bought and sold in their own stock, straight from their SEC Form 4 filings. Values are shares × the reported transaction price where both are disclosed.
Buys plotted up, sells down; bar height is the disclosed dollar value (shares × reported price). Our Form 4 history is only complete from mid-2026, so early months are sparse — the series fills in as more filings land. Open-market purchases and sales only.
Newest filing first — the 114 most recent filings for DYN.
| Filed | Trade date | Insider | Transaction | Shares | Price | Value | 10b5-1 | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-07-08 | 2026-07-07 | Rhodes Jason P Director | SSale | −5.00K | $23.61 | $118K | Yes (planned) | Form 4 ↗ |
| 2026-07-08 | 2026-07-07 | Rhodes Jason P, Director | SSale | −11.7K | $23.62 | $276K | Yes (planned) | Form 4 ↗ |
| 2026-07-08 | 2026-07-07 | Rhodes Jason P, Director | SSale | −49.2K | $23.17 | $1.14M | Yes (planned) | Form 4 ↗ |
| 2026-07-08 | 2026-07-07 | Rhodes Jason P, Director | SSale | −14.8K | $23.62 | $351K | Yes (planned) | Form 4 ↗ |
| 2026-07-08 | 2026-07-07 | Rhodes Jason P, Director | SSale | −62.5K | $23.17 | $1.45M | Yes (planned) | Form 4 ↗ |
| 2026-07-08 | 2026-07-07 | Rhodes Jason P, Director | SSale | −29.6K | $23.62 | $699K | Yes (planned) | Form 4 ↗ |
| 2026-07-08 | 2026-07-07 | Rhodes Jason P, Director | SSale | −124K | $23.17 | $2.88M | Yes (planned) | Form 4 ↗ |
| 2026-07-08 | 2026-07-06 | Rhodes Jason P, Director | SSale | −100K | $22.79 | $2.28M | Yes (planned) | Form 4 ↗ |
| 2026-07-08 | 2026-07-06 | Rhodes Jason P, Director | SSale | −127K | $22.79 | $2.90M | Yes (planned) | Form 4 ↗ |
| 2026-07-08 | 2026-07-06 | Rhodes Jason P, Director | SSale | −253K | $22.79 | $5.77M | Yes (planned) | Form 4 ↗ |
| 2026-06-30 | 2026-06-29 | Rhodes Jason P Director | SSale | −40.7K | $21.14 | $860K | Yes (planned) | Form 4 ↗ |
| 2026-06-30 | 2026-06-29 | Rhodes Jason P, Director | SSale | −51.8K | $21.14 | $1.09M | Yes (planned) | Form 4 ↗ |
| 2026-06-30 | 2026-06-29 | Rhodes Jason P, Director | SSale | −103K | $21.14 | $2.18M | Yes (planned) | Form 4 ↗ |
| 2026-06-30 | 2026-06-26 | Rhodes Jason P, Director | SSale | −64.4K | $21.28 | $1.37M | Yes (planned) | Form 4 ↗ |
| 2026-06-30 | 2026-06-26 | Rhodes Jason P, Director | SSale | −81.9K | $21.28 | $1.74M | Yes (planned) | Form 4 ↗ |
| 2026-06-30 | 2026-06-26 | Rhodes Jason P, Director | SSale | −163K | $21.28 | $3.47M | Yes (planned) | Form 4 ↗ |
| 2026-06-26 | 2026-06-25 | Rhodes Jason P Director | SSale | −5.02K | $21.10 | $106K | Yes (planned) | Form 4 ↗ |
| 2026-06-26 | 2026-06-25 | Rhodes Jason P, Director | SSale | −6.38K | $21.10 | $135K | Yes (planned) | Form 4 ↗ |
| 2026-06-26 | 2026-06-25 | Rhodes Jason P, Director | SSale | −12.7K | $21.10 | $268K | Yes (planned) | Form 4 ↗ |
| 2026-06-26 | 2026-06-25 | Lucera Erick Chief Financial Officer | SSale | −2.36K | $20.37 | $48.1K | No | Form 4 ↗ |
| 2026-06-26 | 2026-06-24 | Rhodes Jason P Director | SSale | −20.0K | $21.02 | $420K | Yes (planned) | Form 4 ↗ |
| 2026-06-26 | 2026-06-24 | Rhodes Jason P, Director | SSale | −25.4K | $21.02 | $534K | Yes (planned) | Form 4 ↗ |
| 2026-06-26 | 2026-06-24 | Rhodes Jason P, Director | SSale | −50.5K | $21.02 | $1.06M | Yes (planned) | Form 4 ↗ |
| 2026-06-26 | 2026-06-23 | Rhodes Jason P, Director | SSale | −30.8K | $21.13 | $650K | Yes (planned) | Form 4 ↗ |
| 2026-06-26 | 2026-06-23 | Rhodes Jason P, Director | SSale | −39.1K | $21.13 | $827K | Yes (planned) | Form 4 ↗ |
| 2026-06-26 | 2026-06-23 | Rhodes Jason P, Director | SSale | −77.9K | $21.13 | $1.65M | Yes (planned) | Form 4 ↗ |
| 2026-06-24 | 2026-06-23 | Kersten Dirk Director | SSale | −1.66K | $21.47 | $35.6K | Yes (planned) | Form 4 ↗ |
| 2026-06-24 | 2026-06-23 | Kersten Dirk, Director | SSale | −71.6K | $21.04 | $1.51M | Yes (planned) | Form 4 ↗ |
| 2026-06-24 | 2026-06-22 | Kersten Dirk, Director | SSale | −191K | $20.57 | $3.92M | Yes (planned) | Form 4 ↗ |
| 2026-06-22 | 2026-06-18 | Kersten Dirk Director | SSale | −46.9K | $20.07 | $941K | Yes (planned) | Form 4 ↗ |
| 2026-06-22 | 2026-06-17 | Kersten Dirk, Director | SSale | −37.5K | $20.14 | $754K | Yes (planned) | Form 4 ↗ |
| 2026-06-17 | 2026-06-16 | Friedl-Naderer Johanna Chief Commercial Officer | SSale | −145.00 | $18.33 | $2.66K | Yes (planned) | Form 4 ↗ |
| 2026-06-17 | 2026-06-16 | Kerr Douglas Chief Medical Officer | SSale | −887.00 | $18.33 | $16.3K | Yes (planned) | Form 4 ↗ |
| 2026-06-17 | 2026-06-16 | Cox John CEO & President | SSale | −2.68K | $18.33 | $49.2K | Yes (planned) | Form 4 ↗ |
| 2026-06-09 | 2026-06-08 | Posner Brian S Director | PPurchase | +2.00K | $16.94 | $33.9K | No | Form 4 ↗ |
| 2026-06-05 | 2026-06-03 | Posner Brian S Director | PPurchase | +2.50K | $17.48 | $43.7K | No | Form 4 ↗ |
| 2026-05-28 | 2026-05-26 | Posner Brian S Director | PPurchase | +2.00K | $18.21 | $36.4K | No | Form 4 ↗ |
| 2026-05-22 | 2026-05-20 | Posner Brian S Director | PPurchase | +2.50K | $17.12 | $42.8K | No | Form 4 ↗ |
| 2026-05-14 | 2026-05-13 | Friedl-Naderer Johanna Chief Commercial Officer | SSale | −228.00 | $18.36 | $4.19K | Yes (planned) | Form 4 ↗ |
| 2026-05-14 | 2026-05-13 | Kerr Douglas Chief Medical Officer | SSale | −1.56K | $18.36 | $28.7K | Yes (planned) | Form 4 ↗ |
| 2026-05-14 | 2026-05-13 | Lucera Erick Chief Financial Officer | SSale | −1.45K | $18.36 | $26.6K | Yes (planned) | Form 4 ↗ |
| 2026-05-14 | 2026-05-13 | Cox John CEO & President | SSale | −3.31K | $18.36 | $60.8K | Yes (planned) | Form 4 ↗ |
| 2026-05-06 | 2026-05-06 | Rhodes Jason P Director | SSale | −17.2K | $18.18 | $313K | Yes (planned) | Form 4 ↗ |
| 2026-05-06 | 2026-05-06 | Rhodes Jason P, Director | SSale | −428.00 | $18.18 | $7.78K | Yes (planned) | Form 4 ↗ |
| 2026-05-06 | 2026-05-06 | Rhodes Jason P, Director | SSale | −43.6K | $18.18 | $793K | Yes (planned) | Form 4 ↗ |
| 2026-05-06 | 2026-05-06 | Rhodes Jason P, Director | SSale | −21.9K | $18.18 | $399K | Yes (planned) | Form 4 ↗ |
| 2026-05-06 | 2026-05-05 | Rhodes Jason P, Director | SSale | −2.40K | $18.03 | $43.3K | Yes (planned) | Form 4 ↗ |
| 2026-05-06 | 2026-05-05 | Rhodes Jason P, Director | SSale | −60.00 | $18.03 | $1.08K | Yes (planned) | Form 4 ↗ |
| 2026-05-06 | 2026-05-05 | Rhodes Jason P, Director | SSale | −6.08K | $18.03 | $110K | Yes (planned) | Form 4 ↗ |
| 2026-05-06 | 2026-05-05 | Rhodes Jason P, Director | SSale | −3.06K | $18.03 | $55.1K | Yes (planned) | Form 4 ↗ |
| 2026-05-06 | 2026-05-04 | Rhodes Jason P, Director | SSale | −2.47K | $18.00 | $44.4K | Yes (planned) | Form 4 ↗ |
| 2026-05-06 | 2026-05-04 | Rhodes Jason P, Director | SSale | −61.00 | $18.00 | $1.10K | Yes (planned) | Form 4 ↗ |
| 2026-05-06 | 2026-05-04 | Rhodes Jason P, Director | SSale | −6.24K | $18.00 | $112K | Yes (planned) | Form 4 ↗ |
| 2026-05-06 | 2026-05-04 | Rhodes Jason P, Director | SSale | −3.14K | $18.00 | $56.4K | Yes (planned) | Form 4 ↗ |
| 2026-04-30 | 2026-04-28 | Rhodes Jason P Director | SSale | −21.00 | $19.00 | $399.00 | Yes (planned) | Form 4 ↗ |
| 2026-04-30 | 2026-04-28 | Rhodes Jason P, Director | SSale | −1.00 | $19.00 | $19.00 | Yes (planned) | Form 4 ↗ |
| 2026-04-30 | 2026-04-28 | Rhodes Jason P, Director | SSale | −52.00 | $19.00 | $988.00 | Yes (planned) | Form 4 ↗ |
| 2026-04-30 | 2026-04-28 | Rhodes Jason P, Director | SSale | −26.00 | $19.00 | $494.00 | Yes (planned) | Form 4 ↗ |
| 2026-04-30 | 2026-04-28 | Rhodes Jason P, Director | SSale | −47.1K | $18.38 | $865K | Yes (planned) | Form 4 ↗ |
| 2026-04-30 | 2026-04-28 | Rhodes Jason P, Director | SSale | −1.17K | $18.38 | $21.5K | Yes (planned) | Form 4 ↗ |
| 2026-04-30 | 2026-04-28 | Rhodes Jason P, Director | SSale | −119K | $18.38 | $2.19M | Yes (planned) | Form 4 ↗ |
| 2026-04-30 | 2026-04-28 | Rhodes Jason P, Director | SSale | −59.9K | $18.38 | $1.10M | Yes (planned) | Form 4 ↗ |
| 2026-04-28 | 2026-04-24 | Lubner David Charles Director | GGift | −53.6K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-27 | 2026-04-27 | Rhodes Jason P Director | SSale | −35.9K | $18.15 | $652K | Yes (planned) | Form 4 ↗ |
| 2026-04-27 | 2026-04-27 | Rhodes Jason P, Director | SSale | −894.00 | $18.15 | $16.2K | Yes (planned) | Form 4 ↗ |
| 2026-04-27 | 2026-04-27 | Rhodes Jason P, Director | SSale | −90.9K | $18.15 | $1.65M | Yes (planned) | Form 4 ↗ |
| 2026-04-27 | 2026-04-27 | Rhodes Jason P, Director | SSale | −45.7K | $18.15 | $830K | Yes (planned) | Form 4 ↗ |
| 2026-04-27 | 2026-04-24 | Rhodes Jason P, Director | SSale | −28.6K | $18.48 | $528K | Yes (planned) | Form 4 ↗ |
| 2026-04-27 | 2026-04-24 | Rhodes Jason P, Director | SSale | −710.00 | $18.48 | $13.1K | Yes (planned) | Form 4 ↗ |
| 2026-04-27 | 2026-04-24 | Rhodes Jason P, Director | SSale | −72.3K | $18.48 | $1.34M | Yes (planned) | Form 4 ↗ |
| 2026-04-27 | 2026-04-24 | Rhodes Jason P, Director | SSale | −36.3K | $18.48 | $672K | Yes (planned) | Form 4 ↗ |
| 2026-04-27 | 2026-04-23 | Rhodes Jason P, Director | SSale | −15.1K | $19.19 | $291K | Yes (planned) | Form 4 ↗ |
| 2026-04-27 | 2026-04-23 | Rhodes Jason P, Director | SSale | −377.00 | $19.19 | $7.23K | Yes (planned) | Form 4 ↗ |
| 2026-04-27 | 2026-04-23 | Rhodes Jason P, Director | SSale | −38.3K | $19.19 | $735K | Yes (planned) | Form 4 ↗ |
| 2026-04-27 | 2026-04-23 | Rhodes Jason P, Director | SSale | −19.3K | $19.19 | $370K | Yes (planned) | Form 4 ↗ |
| 2026-04-23 | 2026-04-22 | Kersten Dirk Director | SSale | −2.65K | $20.00 | $53.0K | Yes (planned) | Form 4 ↗ |
| 2026-04-23 | 2026-04-21 | Kersten Dirk, Director | SSale | −8.30K | $20.01 | $166K | Yes (planned) | Form 4 ↗ |
| 2026-04-22 | 2026-04-22 | Rhodes Jason P Director | SSale | −59.7K | $19.68 | $1.17M | Yes (planned) | Form 4 ↗ |
| 2026-04-22 | 2026-04-22 | Rhodes Jason P, Director | SSale | −1.49K | $19.68 | $29.2K | Yes (planned) | Form 4 ↗ |
| 2026-04-22 | 2026-04-22 | Rhodes Jason P, Director | SSale | −151K | $19.68 | $2.97M | Yes (planned) | Form 4 ↗ |
| 2026-04-22 | 2026-04-22 | Rhodes Jason P, Director | SSale | −75.9K | $19.68 | $1.49M | Yes (planned) | Form 4 ↗ |
| 2026-04-22 | 2026-04-21 | Rhodes Jason P, Director | SSale | −605.00 | $20.05 | $12.1K | Yes (planned) | Form 4 ↗ |
| 2026-04-22 | 2026-04-21 | Rhodes Jason P, Director | SSale | −15.00 | $20.05 | $300.75 | Yes (planned) | Form 4 ↗ |
| 2026-04-22 | 2026-04-21 | Rhodes Jason P, Director | SSale | −1.53K | $20.05 | $30.7K | Yes (planned) | Form 4 ↗ |
| 2026-04-22 | 2026-04-21 | Rhodes Jason P, Director | SSale | −769.00 | $20.05 | $15.4K | Yes (planned) | Form 4 ↗ |
| 2026-04-22 | 2026-04-21 | Rhodes Jason P, Director | SSale | −56.2K | $19.51 | $1.10M | Yes (planned) | Form 4 ↗ |
| 2026-04-22 | 2026-04-21 | Rhodes Jason P, Director | SSale | −1.40K | $19.51 | $27.3K | Yes (planned) | Form 4 ↗ |
| 2026-04-22 | 2026-04-21 | Rhodes Jason P, Director | SSale | −142K | $19.51 | $2.78M | Yes (planned) | Form 4 ↗ |
| 2026-04-22 | 2026-04-21 | Rhodes Jason P, Director | SSale | −71.5K | $19.51 | $1.39M | Yes (planned) | Form 4 ↗ |
| 2026-04-22 | 2026-04-20 | Rhodes Jason P, Director | SSale | −56.4K | $20.06 | $1.13M | Yes (planned) | Form 4 ↗ |
| 2026-04-22 | 2026-04-20 | Rhodes Jason P, Director | SSale | −1.40K | $20.06 | $28.1K | Yes (planned) | Form 4 ↗ |
| 2026-04-22 | 2026-04-20 | Rhodes Jason P, Director | SSale | −143K | $20.06 | $2.86M | Yes (planned) | Form 4 ↗ |
| 2026-04-22 | 2026-04-20 | Rhodes Jason P, Director | SSale | −71.7K | $20.06 | $1.44M | Yes (planned) | Form 4 ↗ |
| 2026-04-21 | 2026-04-20 | Kersten Dirk Director | SSale | −125K | $20.07 | $2.51M | Yes (planned) | Form 4 ↗ |
| 2026-04-21 | 2026-04-17 | Kersten Dirk, Director | SSale | −212K | $20.29 | $4.30M | Yes (planned) | Form 4 ↗ |
| 2026-04-17 | 2026-04-16 | Kersten Dirk Director | SSale | −6.66K | $20.06 | $134K | Yes (planned) | Form 4 ↗ |
| 2026-04-17 | 2026-04-16 | Kersten Dirk, Director | SSale | −11.1K | $21.10 | $235K | Yes (planned) | Form 4 ↗ |
| 2026-04-17 | 2026-04-15 | Kersten Dirk, Director | SSale | −81.8K | $20.27 | $1.66M | Yes (planned) | Form 4 ↗ |
| 2026-04-03 | 2026-04-01 | Lucera Erick Chief Financial Officer | SSale | −5.73K | $18.64 | $107K | Yes (planned) | Form 4 ↗ |
| 2026-04-01 | 2026-03-30 | Posner Brian S Director | PPurchase | +2.00K | $17.08 | $34.2K | No | Form 4 ↗ |
| 2026-03-13 | 2026-03-11 | Posner Brian S Director | PPurchase | +2.00K | $19.35 | $38.7K | No | Form 4 ↗ |
| 2026-03-13 | 2026-03-11 | Kersten Dirk Director | SSale | −130K | $19.52 | $2.53M | Yes (planned) | Form 4 ↗ |
| 2026-03-11 | 2026-03-10 | Kersten Dirk Director | SSale | −282K | $19.80 | $5.58M | Yes (planned) | Form 4 ↗ |
| 2026-03-11 | 2026-03-10 | Kersten Dirk, Director | SSale | −220K | $19.33 | $4.25M | Yes (planned) | Form 4 ↗ |
| 2026-03-11 | 2026-03-10 | Kersten Dirk, Director | SSale | −9.48K | $18.21 | $173K | Yes (planned) | Form 4 ↗ |
| 2026-03-11 | 2026-03-09 | Kersten Dirk, Director | SSale | −178K | $17.72 | $3.15M | Yes (planned) | Form 4 ↗ |
| 2026-03-10 | 2026-03-06 | Posner Brian S Director | PPurchase | +3.00K | $15.06 | $45.2K | No | Form 4 ↗ |
| 2026-03-06 | 2026-03-05 | Friedl-Naderer Johanna Chief Commercial Officer | SSale | −148.00 | $14.90 | $2.21K | Yes (planned) | Form 4 ↗ |
| 2026-03-06 | 2026-03-05 | Kerr Douglas Chief Medical Officer | SSale | −904.00 | $14.90 | $13.5K | Yes (planned) | Form 4 ↗ |
| 2026-03-06 | 2026-03-05 | Cox John CEO & President | SSale | −2.73K | $14.90 | $40.7K | Yes (planned) | Form 4 ↗ |
| 2026-02-17 | 2026-02-12 | Cox John CEO & President | AAward | +180K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-02-17 | 2026-02-12 | Kerr Douglas Chief Medical Officer | AAward | +85.0K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-02-17 | 2026-02-12 | Friedl-Naderer Johanna Chief Commercial Officer | AAward | +60.0K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-02-17 | 2026-02-12 | Lucera Erick Chief Financial Officer | AAward | +65.0K | $0.00 | $0.00 | No | Form 4 ↗ |
Insiders — a company’s officers, directors and holders of more than 10% of its stock — must report any trade in that stock to the SEC on a Form 4 within two business days. Each row here is one transaction from those filings.
The transaction code tells you what happened: Purchase (P) and Sale (S) are open-market trades — the ones markets watch most; Award (A) is a granted stock or unit, Option exercise (M) converts options into shares, and Gift (G) is a transfer for no consideration. Awards, exercises and gifts are largely compensation or administrative, not a directional bet.
One caveat on sales: many are made under a Rule 10b5-1 plan scheduled months in advance, so a sale is not automatically a bearish signal. Insider activity is a noisy input — read it alongside the filings, not on its own.
See also DYN’s full analysis or the market-wide insider trading feed. The tabs above jump to DYN’s other SEC data.
Source: SEC Form 4 filings for DYN, parsed from EDGAR. Transaction prices are as reported in the filing — SEC public-domain data, not market quotes. Values are shares × reported price where both are disclosed; grants and gifts often carry no price. A delayed record of what insiders reported, not a live position or a recommendation.
Research and education only — not financial advice. TENKis not a registered investment adviser or broker-dealer and gives no personalized advice. Every call is impersonal — identical for all users, generated on a schedule from SEC filings plus a delayed/third-party price feed — may be wrong or out of date, and is not a recommendation to buy or sell any security. The operator and an affiliated trading operation may hold or trade the securities TENK rates; see Disclosures. Past performance does not guarantee future results. Do your own research.