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Dyne Therapeutics, Inc. (NASDAQ:DYN)
US · Delayed Price · Currency is USD
Healthcare · Biotechnology
15.78+0.16 (+1.03%)
Insider Score
/ 100
DYN Insider Score
Dyne Therapeutics, Inc. has a live Insider Score.
Scored on 1 qualifying trade from 1 insider in the last 90 days.
DYN Stock Insider Trading Activity
DYN stock’s insider trading shows 1 purchase for an estimated $40.00K and 27 sales on the open market for an estimated $90.19M by company insiders over the last 6 months.
Not enough price history.
Insider Trading Activity (Form 4 Filings)
An insider trade occurs when an individual that has non-public information about a company buys or sells shares of that company’s stock. Examples of insiders include a company’s executive officers (CEO, CFO, COO), its board of directors, and its major shareholders. Insiders are required to submit their trading activity to the SEC through Form 4 filings.
Scored window · last 90 days1 qualifying buy1 insider$40.00K bought— these are the numbers in the rankings table; the full history below shows every filing (buys, sells and older activity).
| Insider | Action | Shares | Avg Cost | Total | Δ Holdings | Held After | Date | Grade | Form 4 |
|---|---|---|---|---|---|---|---|---|---|
| Kerr Douglas Other | Award | 8,000 | — | — | 4.9% | 170,564 | Oct 20, 2026 | — | Form 4 |
| Posner Brian S Director | Buy | 2,500 | $16.00 | $40.00K | 10.2% | 27,000 | Oct 2, 2026 | FDilution | Form 4 |
| Cox John CEO | Sell | 5,658 | $18.88 | $106.82K | 1.6% | 357,507 | Sep 8, 2026 | — | Form 4 |
| Friedl-Naderer Johanna Other | Sell | 185 | $18.88 | $3.49K | 0.1% | 152,897 | Sep 8, 2026 | — | Form 4 |
| Kerr Douglas Other | Sell | 1,290 | $18.88 | $24.36K | 0.8% | 162,564 | Sep 8, 2026 | — | Form 4 |
| Kerr Douglas Other | Sell | 3,745 | $24.35 | $91.19K | 2.2% | 163,854 | Sep 4, 2026 | — | Form 4 |
| Friedl-Naderer Johanna Other | Sell | 900 | $24.35 | $21.91K | 0.6% | 153,082 | Sep 4, 2026 | — | Form 4 |
| Rhodes Jason P Director | Sell | 478,377 | $25.00 | $11.96M | 45.7% | 567,358 | Aug 14, 2026 | — | Form 4 |
| Rhodes Jason P Director | Sell | 322,465 | $25.00 | $8.06M | 42.9% | 428,946 | Aug 14, 2026 | — | Form 4 |
| Rhodes Jason P Director | Sell | 1,359,674 | $25.00 | $33.99M | 35.8% | 2,441,454 | Aug 14, 2026 | — | Form 4 |
| Rhodes Jason P Director | Sell | 94,415 | $26.20 | $2.47M | 8.3% | 1,045,735 | Aug 13, 2026 | — | Form 4 |
| Rhodes Jason P Director | Sell | 63,643 | $26.20 | $1.67M | 7.8% | 751,411 | Aug 13, 2026 | — | Form 4 |
| Cox John CEO | Sell | 4,986 | $26.28 | $131.03K | 1.4% | 363,165 | Aug 13, 2026 | — | Form 4 |
| Kerr Douglas Other | Sell | 1,556 | $26.28 | $40.89K | 0.9% | 167,599 | Aug 13, 2026 | — | Form 4 |
| Lucera Erick CFO | Sell | 1,797 | $26.28 | $47.23K | 1.5% | 119,766 | Aug 13, 2026 | — | Form 4 |
| Rhodes Jason P Director | Sell | 268,354 | $26.20 | $7.03M | 6.6% | 3,801,128 | Aug 13, 2026 | — | Form 4 |
| Friedl-Naderer Johanna Other | Sell | 226 | $26.28 | $5.94K | 0.1% | 153,982 | Aug 13, 2026 | — | Form 4 |
| Kersten Dirk Director | Sell | 256,072 | $25.50 | $6.53M | 6.7% | 3,592,184 | Jul 27, 2026 | — | Form 4 |
| Kersten Dirk Director | Sell | 5,388 | $26.04 | $140.32K | 0.1% | 3,586,796 | Jul 27, 2026 | — | Form 4 |
| Rhodes Jason P Director | Sell | 62,543 | $23.17 | $1.45M | 5.1% | 1,154,994 | Jul 7, 2026 | — | Form 4 |
| Rhodes Jason P Director | Sell | 29,587 | $23.62 | $698.84K | 0.7% | 4,069,482 | Jul 7, 2026 | — | Form 4 |
| Rhodes Jason P Director | Sell | 124,379 | $23.17 | $2.88M | 2.9% | 4,099,069 | Jul 7, 2026 | — | Form 4 |
| Rhodes Jason P Director | Sell | 5,000 | $23.61 | $118.05K | 62.8% | 2,962 | Jul 7, 2026 | — | Form 4 |
| Rhodes Jason P Director | Sell | 11,665 | $23.62 | $275.53K | 1.4% | 815,054 | Jul 7, 2026 | — | Form 4 |
| Rhodes Jason P Director | Sell | 49,193 | $23.17 | $1.14M | 5.6% | 826,719 | Jul 7, 2026 | — | Form 4 |
| Rhodes Jason P Director | Sell | 14,844 | $23.62 | $350.62K | 1.3% | 1,140,150 | Jul 7, 2026 | — | Form 4 |
| Rhodes Jason P Director | Sell | 253,039 | $22.79 | $5.77M | 5.7% | 4,223,448 | Jul 6, 2026 | — | Form 4 |
| Rhodes Jason P Director | Sell | 100,019 | $22.79 | $2.28M | 10.2% | 875,912 | Jul 6, 2026 | — | Form 4 |
| Rhodes Jason P Director | Sell | 127,182 | $22.79 | $2.90M | 9.5% | 1,217,537 | Jul 6, 2026 | — | Form 4 |
What these mean— the action is the SEC’s own Form 4 transaction code. Only a buy or a sell is an open-market trade; the rest are transfers, awards and exercises, which is why they carry no price.
- Buy (P) — Open-market or private purchase
- Sell (S) — Open-market or private sale
- Award (A) — Grant or award from the company, not a purchase
Disclaimer — Informational only — not investment advice. Insider transaction data is sourced from SEC Form 4 filings; market data from public feeds and may be delayed. The Insider Score is a proprietary score for research purposes and does not predict future performance. Always do your own research.