Dyne Therapeutics's three largest insider shareholders as of March 23, 2026 are Venture Fund Xi, L.P. Atlas (TenPercentOwner, 6.56Mn shares), Dirk Kersten (Director, 4.77Mn shares), Venture Opportunity Fund I, L.P. Atlas (TenPercentOwner, 2.31Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Dirk Kersten | 0 | 4,644,386 | 13 Mar, 2026 | |
| Jason P Rhodes | 0 | 1,958,427 | 29 Jan, 2025 | |
| Douglas Kerr | Chief Medical Officer | 171,606 | 0 | 06 Mar, 2026 |
| Johanna Friedl-Naderer | Chief Commercial Officer | 154,581 | 0 | 06 Mar, 2026 |
| Wildon Farwell | Chief Medical Officer | 143,222 | 0 | 20 Aug, 2024 |
| Jonathan Mcneill | Chief Business Officer | 132,106 | 0 | 20 Aug, 2024 |
| Susanna Gatti High | Chief Operating Officer | 131,636 | 0 | 19 Sep, 2024 |
| Erick Lucera | Chief Financial Officer | 131,100 | 0 | 17 Feb, 2026 |
| Richard William Scalzo | Svp, Head Of Finance Admin. | 122,330 | 0 | 13 Mar, 2025 |
| Brian S Posner | 13,500 | 0 | 13 Mar, 2026 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 11 Mar, 2026 | Dirk Kersten | Common Stock | D | 129,672 | $19.52 | 4,644,386 | I | S |
| 11 Mar, 2026 | Brian S Posner | Common Stock | A | 2,000 | $19.35 | 13,500 | D | P |
| 09 Mar, 2026 | Dirk Kersten | Common Stock | D | 177,690 | $17.72 | 5,285,156 | I | S |
| 10 Mar, 2026 | Dirk Kersten | Common Stock | D | 9,482 | $18.21 | 5,275,674 | I | S |
| 10 Mar, 2026 | Dirk Kersten | Common Stock | D | 219,758 | $19.33 | 5,055,916 | I | S |
| 10 Mar, 2026 | Dirk Kersten | Common Stock | D | 281,858 | $19.80 | 4,774,058 | I | S |
| 06 Mar, 2026 | Brian S Posner | Common Stock | A | 3,000 | $15.06 | 11,500 | D | P |
| 05 Mar, 2026 | Douglas Kerr | Common Stock | D | 904 | $14.90 | 171,606 | D | S |
| 05 Mar, 2026 | Johanna Friedl-Naderer | Common Stock | D | 148 | $14.90 | 154,581 | D | S |
| 12 Feb, 2026 | Erick Lucera | Common Stock | A | 65,000 | $0.00 | 131,100 | D | A |
| 12 Feb, 2026 | Douglas Kerr | Common Stock | A | 85,000 | $0.00 | 172,510 | D | A |
| 12 Feb, 2026 | Johanna Friedl-Naderer | Common Stock | A | 60,000 | $0.00 | 154,729 | D | A |
| 12 Feb, 2026 | Douglas Kerr | Stock option (right to buy) | A | 130,000 | $0.00 | 130,000 | D | A |
| 12 Feb, 2026 | Erick Lucera | Stock Option (Right to Buy) | A | 105,000 | $0.00 | 105,000 | D | A |
| 12 Feb, 2026 | Johanna Friedl-Naderer | Stock option (right to buy) | A | 90,000 | $0.00 | 90,000 | D | A |
| 22 Dec, 2025 | Vikram Karnani | Stock option (right to buy) | A | 59,665 | $0.00 | 59,665 | D | A |
| 05 Dec, 2025 | Johanna Friedl-Naderer | Common Stock | D | 144 | $20.72 | 94,729 | D | S |
| 05 Dec, 2025 | Douglas Kerr | Common Stock | D | 880 | $20.72 | 87,510 | D | S |
| 01 Oct, 2025 | Brian S Posner | Stock option (right to buy) | A | 70,000 | $0.00 | 70,000 | D | A |
| 04 Sep, 2025 | Johanna Friedl-Naderer | Common Stock | D | 894 | $13.27 | 95,017 | D | S |