Insider tradingForm 4
Dyne Therapeutics, Inc. (DYN) Insider Trading
12 open-market trades reported since Aug 17, 2026: 1 purchases worth $40K and 11 sales worth $65.7M.
By insider
| Insider | Role | Buys | Bought | Sells | Sold |
|---|---|---|---|---|---|
| Brian S. Posner | Director | 1 | $40K | 0 | $0 |
| John Cox | CEO | 0 | $0 | 2 | $238K |
| Douglas Kerr | Chief Medical Officer | 0 | $0 | 3 | $156K |
| Johanna Friedl-Naderer | Chief Commercial Officer | 0 | $0 | 3 | $31K |
| Jason P. Rhodes | Director | 0 | $0 | 2 | $65.2M |
| Erick Lucera | CFO | 0 | $0 | 1 | $47K |
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All trades
| Filed | Insider | Type | Value | 3 mo. after |
|---|---|---|---|---|
| Oct 6 | Brian S. PosnerDirector | ▲ BUY | $40K | |
| Sep 8 | John CoxCEO | ▼ SELL10b5-1 | $107K | |
| Sep 8 | Douglas KerrChief Medical Officer | ▼ SELL10b5-1 | $91K | |
| Sep 8 | Douglas KerrChief Medical Officer | ▼ SELL10b5-1 | $24K | |
| Sep 8 | Johanna Friedl-NadererChief Commercial Officer | ▼ SELL10b5-1 | $22K | |
| Sep 8 | Johanna Friedl-NadererChief Commercial Officer | ▼ SELL10b5-1 | $3K | |
| Aug 17 | Jason P. RhodesDirector | ▼ SELL10b5-1 | $54.0M | |
| Aug 17 | Jason P. RhodesDirector | ▼ SELL10b5-1 | $11.2M | |
| Aug 17 | John CoxCEO | ▼ SELL10b5-1 | $131K | |
| Aug 17 | Erick LuceraCFO | ▼ SELL10b5-1 | $47K | |
| Aug 17 | Douglas KerrChief Medical Officer | ▼ SELL10b5-1 | $41K | |
| Aug 17 | Johanna Friedl-NadererChief Commercial Officer | ▼ SELL10b5-1 | $6K |
Source: SEC Form 4 filings, retrieved Oct 28, 2026. How we read filings