DYN's three largest insider shareholders as of April 22, 2026 are Venture Fund Xi, L.P. Atlas (TenPercentOwner, 6.56Mn shares), Dirk Kersten (Director, 4.64Mn shares), Venture Opportunity Fund I, L.P. Atlas (TenPercentOwner, 2.31Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Venture Fund Xi, L.P. Atlas | - | 5,698,091 | 864,487 | 28 Feb, 2024 |
| Dirk Kersten | - | 0 | 4,644,386 | 13 Mar, 2026 |
| Dirk Kersten | - | 0 | 4,207,525 | 21 Apr, 2026 |
| Venture Opportunity Fund I, L.P. Atlas | - | 1,458,691 | 847,388 | 05 Mar, 2024 |
| Venture Opportunity Fund I, L.P. Atlas | - | 1,458,691 | 847,388 | 05 Mar, 2024 |
| Venture Opportunity Fund I, L.P. Atlas | - | 1,458,691 | 847,388 | 05 Mar, 2024 |
| Jason P Rhodes | - | 0 | 1,958,427 | 29 Jan, 2025 |
| Jason P Rhodes | - | 0 | 1,958,427 | 29 Jan, 2025 |
| Venture Opportunity Fund Ii, L.P. Atlas | - | 934,581 | 0 | 14 Dec, 2022 |
| Venture Opportunity Fund Ii, L.P. Atlas | - | 934,581 | 0 | 14 Dec, 2022 |
| Venture Opportunity Fund Ii, L.P. Atlas | - | 934,581 | 0 | 14 Dec, 2022 |
| Joshua T Brumm | Ceo President | 537,998 | 0 | 12 Mar, 2024 |
| John Cox | Ceo President | 374,145 | 0 | 06 Mar, 2026 |
| Oxana Beskrovnaya | Chief Scientific Officer | 195,840 | 0 | 13 Mar, 2025 |
| Douglas Kerr | Chief Medical Officer | 171,606 | 0 | 06 Mar, 2026 |
| 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 |
| Wildon Farwell | Chief Medical Officer | 143,222 | 0 | 20 Aug, 2024 |
| Jonathan Mcneill | Chief Business Officer | 132,106 | 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 |
| Susanna Gatti High | Chief Operating Officer | 131,636 | 0 | 19 Sep, 2024 |
| Erick Lucera | Chief Financial Officer | 125,373 | 0 | 03 Apr, 2026 |
| Erick Lucera | Chief Financial Officer | 125,373 | 0 | 03 Apr, 2026 |
| Richard William Scalzo | Svp, Head Of Finance Admin. | 122,330 | 0 | 13 Mar, 2025 |
| Richard William Scalzo | Svp, Head Of Finance Admin. | 122,330 | 0 | 13 Mar, 2025 |
| John Cox | Ceo President | 0 | 32,000 | 04 Sep, 2024 |
| Brian S Posner | - | 15,500 | 0 | 01 Apr, 2026 |
| Brian S Posner | - | 15,500 | 0 | 01 Apr, 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 |
|---|---|---|---|---|---|---|---|---|
| 17 Apr, 2026 | Dirk Kersten | Common Stock | D | 211,974 | $20.29 | 4,332,799 | I | S |
| 20 Apr, 2026 | Dirk Kersten | Common Stock | D | 125,274 | $20.07 | 4,207,525 | I | S |
| 15 Apr, 2026 | Dirk Kersten | Common Stock | D | 81,840 | $20.27 | 4,562,546 | I | S |
| 16 Apr, 2026 | Dirk Kersten | Common Stock | D | 11,116 | $21.10 | 4,551,430 | I | S |
| 16 Apr, 2026 | Dirk Kersten | Common Stock | D | 6,657 | $20.06 | 4,544,773 | I | S |
| 01 Apr, 2026 | Erick Lucera | Common Stock | D | 5,727 | $18.64 | 125,373 | D | S |
| 01 Apr, 2026 | Erick Lucera | Common Stock | D | 5,727 | $18.64 | 125,373 | D | S |
| 30 Mar, 2026 | Brian S Posner | Common Stock | A | 2,000 | $17.08 | 15,500 | D | P |
| 30 Mar, 2026 | Brian S Posner | Common Stock | A | 2,000 | $17.08 | 15,500 | D | P |
| 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 |
| 11 Mar, 2026 | Brian S Posner | Common Stock | A | 2,000 | $19.35 | 13,500 | D | P |
| 11 Mar, 2026 | Dirk Kersten | Common Stock | D | 129,672 | $19.52 | 4,644,386 | I | S |
| 09 Mar, 2026 | Dirk Kersten | Common Stock | D | 177,690 | $17.72 | 5,285,156 | I | S |
| 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 | 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 | 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 |