Over the past 12 months, Dyne Therapeutics insiders bought $314,840 of stock on the open market (18.5K shares) and sold $168.62 million (7.61Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Venture Fund Xi, L.P. Atlas | TenPercentOwner | 5,698,091 | 864,487 | 6,562,578 | 41.3% | 28 Feb, 2024 |
| 2 | Dirk Kersten | Director | 0 | 3,586,796 | 3,586,796 | 22.6% | 29 Jul, 2026 |
| 3 | Venture Opportunity Fund I, L.P. Atlas | TenPercentOwner | 1,458,691 | 847,388 | 2,306,079 | 14.5% | 05 Mar, 2024 |
| 4 | Venture Opportunity Fund Ii, L.P. Atlas | TenPercentOwner | 934,581 | 0 | 934,581 | 5.9% | 14 Dec, 2022 |
| 5 | Joshua T Brumm | Ceo President | 537,998 | 0 | 537,998 | 3.4% | 12 Mar, 2024 |
| 6 | Jason P Rhodes | Director | 0 | 428,946 | 428,946 | 2.7% | 17 Aug, 2026 |
| 7 | John Cox | Ceo President | 357,507 | 0 | 357,507 | 2.2% | 08 Sep, 2026 |
| 8 | Oxana Beskrovnaya | Chief Scientific Officer | 195,840 | 0 | 195,840 | 1.2% | 13 Mar, 2025 |
| 9 | Douglas Kerr | Chief Medical Officer | 162,564 | 0 | 162,564 | 1.0% | 08 Sep, 2026 |
| 10 | Johanna Friedl-Naderer | Chief Commercial Officer | 152,897 | 0 | 152,897 | 1.0% | 08 Sep, 2026 |
| 11 | Wildon Farwell | Chief Medical Officer | 143,222 | 0 | 143,222 | 0.9% | 20 Aug, 2024 |
| 12 | Jonathan Mcneill | Chief Business Officer | 132,106 | 0 | 132,106 | 0.8% | 20 Aug, 2024 |
| 13 | Susanna Gatti High | Chief Operating Officer | 131,636 | 0 | 131,636 | 0.8% | 19 Sep, 2024 |
| 14 | Richard William Scalzo | Svp, Head Of Finance Admin. | 122,330 | 0 | 122,330 | 0.8% | 13 Mar, 2025 |
| 15 | Erick Lucera | Chief Financial Officer | 119,766 | 0 | 119,766 | 0.8% | 17 Aug, 2026 |
| 16 | Brian S Posner | Director | 27,000 | 0 | 27,000 | 0.2% | 06 Oct, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 02 Oct, 2026 | Brian S Posner | Director | Acquired P | 2,500 | $16.00 | $40.00K | 27,000 | Direct |
| 04 Sep, 2026 | Douglas Kerr | Chief Medical Officer | Disposed S | 3,745 | $24.35 | $91.19K | 163,854 | Direct |
| 04 Sep, 2026 | Johanna Friedl-Naderer | Chief Commercial Officer | Disposed S | 900 | $24.35 | $21.92K | 153,082 | Direct |
| 08 Sep, 2026 | John Cox | Ceo President | Disposed S | 5,658 | $18.88 | $106.82K | 357,507 | Direct |
| 08 Sep, 2026 | Douglas Kerr | Chief Medical Officer | Disposed S | 1,290 | $18.88 | $24.36K | 162,564 | Direct |
| 08 Sep, 2026 | Johanna Friedl-Naderer | Chief Commercial Officer | Disposed S | 185 | $18.88 | $3.49K | 152,897 | Direct |
| 13 Aug, 2026 | Johanna Friedl-Naderer | Chief Commercial Officer | Disposed S | 226 | $26.28 | $5.94K | 153,982 | Direct |
| 13 Aug, 2026 | Erick Lucera | Chief Financial Officer | Disposed S | 1,797 | $26.28 | $47.23K | 119,766 | Direct |
| 13 Aug, 2026 | Douglas Kerr | Chief Medical Officer | Disposed S | 1,556 | $26.28 | $40.89K | 167,599 | Direct |
| 13 Aug, 2026 | John Cox | Ceo President | Disposed S | 4,986 | $26.28 | $131.03K | 363,165 | Direct |
| 13 Aug, 2026 | Jason P Rhodes | Director | Disposed S | 268,354 | $26.20 | $7.03Mn | 3,801,128 | Indirect |
| 13 Aug, 2026 | Jason P Rhodes | Director | Disposed S | 94,415 | $26.20 | $2.47Mn | 1,045,735 | Indirect |
| 13 Aug, 2026 | Jason P Rhodes | Director | Disposed S | 63,643 | $26.20 | $1.67Mn | 751,411 | Indirect |
| 14 Aug, 2026 | Jason P Rhodes | Director | Disposed S | 1,359,674 | $25.00 | $33.99Mn | 2,441,454 | Indirect |
| 14 Aug, 2026 | Jason P Rhodes | Director | Disposed S | 478,377 | $25.00 | $11.96Mn | 567,358 | Indirect |
| 14 Aug, 2026 | Jason P Rhodes | Director | Disposed S | 322,465 | $25.00 | $8.06Mn | 428,946 | Indirect |
| 27 Jul, 2026 | Dirk Kersten | Director | Disposed S | 256,072 | $25.50 | $6.53Mn | 3,592,184 | Indirect |
| 27 Jul, 2026 | Dirk Kersten | Director | Disposed S | 5,388 | $26.04 | $140.32K | 3,586,796 | Indirect |
| 06 Jul, 2026 | Jason P Rhodes | Director | Disposed S | 253,039 | $22.79 | $5.77Mn | 4,223,448 | Indirect |
| 06 Jul, 2026 | Jason P Rhodes | Director | Disposed S | 127,182 | $22.79 | $2.90Mn | 1,217,537 | Indirect |