Dyne Therapeutics Inc (DYN): Congress and insider trades
Who in Congress and inside the company traded DYN, when each filing appeared, and what buying after each one would have earned against the S&P 500.
Key Facts
- Dyne Therapeutics Inc (DYN) is a listed stock on NASDAQ.
- Insiders filed 4 open market buys worth $156K and 37 sells worth $152M, the latest filed 2026-09-08 (8 September 2026).
- Across 4 scored buys, Insiders averaged +8.1% against the S&P 500 (SPY) over the 90 days after disclosure, with 75% of them ahead of the index. That result is too few trades to draw a conclusion.
- Data as of 2026-09-29 (29 September 2026).
Insider trades in DYN
as of 2026-09-08| Filed | Insider | Type | Shares | Price | Value | 90 day vs S&P |
|---|---|---|---|---|---|---|
| 8 Sep 2026 | Kerr Douglas | sell | 1,290 | $18.88 | $24.4K | n/a |
| 8 Sep 2026 | Friedl-Naderer Johanna | sell | 185 | $18.88 | $3.5K | n/a |
| 8 Sep 2026 | Friedl-Naderer Johanna | sell | 900 | $24.35 | $21.9K | n/a |
| 8 Sep 2026 | Kerr Douglas | sell | 3,745 | $24.35 | $91.2K | n/a |
| 8 Sep 2026 | Cox John | sell | 5,658 | $18.88 | $107K | n/a |
| 17 Aug 2026 | Rhodes Jason P | sell | 2,160,516 | $25.00 | $54M | n/a |
| 17 Aug 2026 | Rhodes Jason P | sell | 426,412 | $26.20 | $11M | n/a |
| 29 Jul 2026 | Kersten Dirk | sell | 261,460 | $25.51 | $6.7M | n/a |
| 8 Jul 2026 | Rhodes Jason P | sell | 480,240 | $22.79 | $11M | n/a |
| 8 Jul 2026 | Rhodes Jason P | sell | 297,211 | $23.26 | $6.9M | n/a |
| 30 Jun 2026 | Rhodes Jason P | sell | 309,268 | $21.28 | $6.6M | n/a |
| 30 Jun 2026 | Rhodes Jason P | sell | 195,427 | $21.14 | $4.1M | n/a |
| 26 Jun 2026 | Rhodes Jason P | sell | 24,100 | $21.10 | $509K | n/a |
| 26 Jun 2026 | Rhodes Jason P | sell | 95,900 | $21.02 | $2.0M | n/a |
| 26 Jun 2026 | Lucera Erick | sell | 2,362 | $20.37 | $48.1K | n/a |
| 26 Jun 2026 | Rhodes Jason P | sell | 147,760 | $21.13 | $3.1M | n/a |
| 24 Jun 2026 | Kersten Dirk | sell | 73,286 | $21.05 | $1.5M | n/a |
| 24 Jun 2026 | Kersten Dirk | sell | 190,676 | $20.57 | $3.9M | n/a |
| 22 Jun 2026 | Kersten Dirk | sell | 37,454 | $20.14 | $754K | n/a |
| 22 Jun 2026 | Kersten Dirk | sell | 46,901 | $20.07 | $941K | n/a |
| 9 Jun 2026 | Posner Brian S | buy | 2,000 | $16.94 | $33.9K | +9.1% |
| 22 May 2026 | Posner Brian S | buy | 2,500 | $17.12 | $42.8K | +41.2% |
| 6 May 2026 | Rhodes Jason P | sell | 11,904 | $18.00 | $214K | n/a |
| 6 May 2026 | Rhodes Jason P | sell | 83,219 | $18.18 | $1.5M | n/a |
| 6 May 2026 | Rhodes Jason P | sell | 11,600 | $18.03 | $209K | n/a |
| 30 Apr 2026 | Rhodes Jason P | sell | 227,337 | $18.38 | $4.2M | n/a |
| 27 Apr 2026 | Rhodes Jason P | sell | 137,948 | $18.48 | $2.5M | n/a |
| 27 Apr 2026 | Rhodes Jason P | sell | 173,493 | $18.15 | $3.1M | n/a |
| 27 Apr 2026 | Rhodes Jason P | sell | 73,108 | $19.19 | $1.4M | n/a |
| 23 Apr 2026 | Kersten Dirk | sell | 8,300 | $20.01 | $166K | n/a |
| 23 Apr 2026 | Kersten Dirk | sell | 2,652 | $20.00 | $53.0K | n/a |
| 22 Apr 2026 | Rhodes Jason P | sell | 274,297 | $19.52 | $5.4M | n/a |
| 22 Apr 2026 | Rhodes Jason P | sell | 287,956 | $19.68 | $5.7M | n/a |
| 22 Apr 2026 | Rhodes Jason P | sell | 272,049 | $20.06 | $5.5M | n/a |
| 21 Apr 2026 | Kersten Dirk | sell | 211,974 | $20.29 | $4.3M | n/a |
| 21 Apr 2026 | Kersten Dirk | sell | 125,274 | $20.07 | $2.5M | n/a |
| 17 Apr 2026 | Kersten Dirk | sell | 17,773 | $20.71 | $368K | n/a |
| 17 Apr 2026 | Kersten Dirk | sell | 81,840 | $20.27 | $1.7M | n/a |
| 3 Apr 2026 | Lucera Erick | sell | 5,727 | $18.64 | $107K | n/a |
| 1 Apr 2026 | Posner Brian S | buy | 2,000 | $17.08 | $34.2K | +1.7% |
| 10 Mar 2026 | Posner Brian S | buy | 3,000 | $15.06 | $45.2K | -19.6% |
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Frequently asked questions
Who has bought DYN?
0 Congress buys by 0 members and 4 insider buys are on file. The tables on this page list every one.
Did buying DYN after a disclosure beat the market?
Across 4 scored buys, Insiders averaged +8.1% against the S&P 500 (SPY) over the 90 days after disclosure, with 75% of them ahead of the index. That result is too few trades to draw a conclusion. A single stock is a small sample.
Sources: Congressional trades: STOCK Act disclosures, collected from CapitolTrades. Insider trades: SEC Form 4 filings, collected from Finviz. Prices: Yahoo Finance daily adjusted closes. Data as of 2026-09-29 (29 September 2026). About these sources.
Not investment advice. Past disclosed trades do not predict future returns. Disclosures are published late, so the trades shown are ones you could only have copied after the fact. Talk to a licensed adviser before you invest.