Updated Jul 16, 2026 · Last SEC filing 2026-07-08
Dyne Therapeutics, Inc. (DYN) has filed 31 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-07-08. 5 Form 8-K material event filings were reported by DYN in the last 90 days. 67 Form 144 notices of proposed sale were filed for DYN stock. InsiderAlpha tracks every DYN SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SIC classification | Pharmaceutical Preparations (SIC 2834) |
|---|---|
| SEC CIK | 0001818794 |
| Form 4 filings (90d) | 31 |
|---|---|
| Form 8-K filings (90d) | 5 |
| Form 144 notices (90d) | 67 |
| Latest Form 4 filing | 2026-07-08 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Rhodes Jason P | Insider | S — Open-market sale | 14.8K | $23.62 | $351K | SEC | |
| Rhodes Jason P | Insider | S — Open-market sale | 62.5K | $23.17 | $1.45M | SEC | |
| Rhodes Jason P | Insider | S — Open-market sale | 5.0K | $23.61 | $118K | SEC | |
| Rhodes Jason P | Insider | S — Open-market sale | 49.2K | $23.17 | $1.14M | SEC | |
| Rhodes Jason P | Insider | S — Open-market sale | 124.4K | $23.17 | $2.88M | SEC | |
| Rhodes Jason P | Insider | S — Open-market sale | 11.7K | $23.62 | $276K | SEC | |
| Rhodes Jason P | Insider | S — Open-market sale | 29.6K | $23.62 | $699K | SEC | |
| Rhodes Jason P | Insider | S — Open-market sale | 100.0K | $22.79 | $2.28M | SEC | |
| Rhodes Jason P | Insider | S — Open-market sale | 253.0K | $22.79 | $5.77M | SEC | |
| Rhodes Jason P | Insider | S — Open-market sale | 127.2K | $22.79 | $2.90M | SEC | |
| Rhodes Jason P | Insider | S — Open-market sale | 103.0K | $21.14 | $2.18M | SEC | |
| Rhodes Jason P | Insider | S — Open-market sale | 51.8K | $21.14 | $1.09M | SEC | |
| Rhodes Jason P | Insider | S — Open-market sale | 40.7K | $21.14 | $860K | SEC | |
| Rhodes Jason P | Insider | S — Open-market sale | 163.0K | $21.28 | $3.47M | SEC | |
| Rhodes Jason P | Insider | S — Open-market sale | 81.9K | $21.28 | $1.74M | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for Dyne Therapeutics, Inc. (DYN). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Rhodes Jason P | 66 | $59.73M |
| Kersten Dirk | 13 | $16.22M |
| Posner Brian S | 5 | $157K |
| Cox John | 2 | $110K |
| Kerr Douglas | 2 | $45K |
Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in DYN insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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