DYN insider trading — Dyne Therapeutics, Inc.
Over the last 90 days, insiders at Dyne Therapeutics, Inc. (DYN) made 1 open-market purchase worth $40K and 0 open-market sales worth $0, making them net buyers by $40K. The largest purchase was by Posner Brian S (Director), who bought 2,500 shares for $40K on Oct 2, 2026.
Updated Oct 16, 2026.
Recent DYN insider transactions
Every Form 4 filed by Dyne Therapeutics, Inc. officers, directors and 10% owners in the last 90 days, newest first. P = open-market purchase, S = open-market sale; other codes are awards, option exercises, tax withholding or gifts.
| Trade date | Insider | Role | Type | Ownership | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|---|
| Oct 2, 2026 | Posner Brian S | Director | P · Purchase | Direct | 2,500 | $16.00 | $40K | Form 4 |
| Sep 8, 2026 | Friedl-Naderer Johanna | Chief Commercial Officer | S · Sale · 10b5-1 | Direct | 185 | $18.88 | $3K | Form 4 |
| Sep 4, 2026 | Friedl-Naderer Johanna | Chief Commercial Officer | S · Sale · 10b5-1 | Direct | 900 | $24.35 | $22K | Form 4 |
| Sep 8, 2026 | Kerr Douglas | Chief Medical Officer | S · Sale · 10b5-1 | Direct | 1,290 | $18.88 | $24K | Form 4 |
| Sep 4, 2026 | Kerr Douglas | Chief Medical Officer | S · Sale · 10b5-1 | Direct | 3,745 | $24.35 | $91K | Form 4 |
| Sep 8, 2026 | Cox John | CEO & President | S · Sale · 10b5-1 | Direct | 5,658 | $18.88 | $107K | Form 4 |
| Aug 14, 2026 | Rhodes Jason P | Director | S · Sale · 10b5-1 | Indirect | 2,160,516 | $25.00 | $54.01M | Form 4 |
| Aug 13, 2026 | Rhodes Jason P | Director | S · Sale · 10b5-1 | Indirect | 426,412 | $26.20 | $11.17M | Form 4 |
| Aug 13, 2026 | Kerr Douglas | Chief Medical Officer | S · Sale · 10b5-1 | Direct | 1,556 | $26.28 | $41K | Form 4 |
| Aug 13, 2026 | Friedl-Naderer Johanna | Chief Commercial Officer | S · Sale · 10b5-1 | Direct | 226 | $26.28 | $6K | Form 4 |
| Aug 13, 2026 | Cox John | CEO & President | S · Sale · 10b5-1 | Direct | 4,986 | $26.28 | $131K | Form 4 |
| Aug 13, 2026 | Lucera Erick | Chief Financial Officer | S · Sale · 10b5-1 | Direct | 1,797 | $26.28 | $47K | Form 4 |
| Jul 27, 2026 | Kersten Dirk | Director | S · Sale · 10b5-1 | Indirect | 261,460 | $25.51 | $6.67M | Form 4 |
DYN insider trading FAQ
Are insiders buying DYN stock?
Yes. In the last 90 days, Dyne Therapeutics, Inc. insiders made 1 open-market purchase totaling $40K, and no open-market sales. Purchases with the insider's own money are generally seen as a stronger signal than sales, which happen for many reasons (taxes, diversification, planned 10b5-1 sales).
Who are the insiders trading DYN?
Recent buyers: Posner Brian S.
Where does DYN insider trading data come from?
Every transaction comes from SEC Form 4 filings on EDGAR. Company officers, directors and 10% owners must file a Form 4 within two business days of buying or selling. InsiderBolt reads these filings directly from the SEC.
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Insider trading data is for informational purposes only and is not investment advice. Filings can be amended; always confirm details on SEC EDGAR.