Dyne Therapeutics, Inc. (DYN) Insider Trading
Over the last 3 months, DYN insiders made 4 open-market buys and 84 sales, a net sale of -$62.5M (SEC Form 4). Over the last 6 months, 208 institutions increased and 116 reduced their position (13F).
Insider Activity
Sentiment
0/100
Buys (3m)
4
Sells (3m)
84
Net (3m)
-$62.5M
Insiders buying
Insider trades by month Buys Sells
Sep
Dec
Mar
Apr
May
Jun
Context3-month price +22.5%Institutions accumulating (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Jun 30, 2026 | Rhodes Jason Pdirector | Sell | 162,954 | $21.28 |
| Jun 30, 2026 | Rhodes Jason Pdirector | Sell | 102,969 | $21.14 |
| Jun 30, 2026 | Rhodes Jason Pdirector | Sell | 81,903 | $21.28 |
| Jun 30, 2026 | Rhodes Jason Pdirector | Sell | 40,702 | $21.14 |
| Jun 30, 2026 | Rhodes Jason Pdirector | Sell | 64,411 | $21.28 |
| Jun 30, 2026 | Rhodes Jason Pdirector | Sell | 51,756 | $21.14 |
| Jun 26, 2026 | Rhodes Jason Pdirector | Sell | 39,131 | $21.13 |
| Jun 26, 2026 | Rhodes Jason Pdirector | Sell | 12,699 | $21.10 |
| Jun 26, 2026 | Rhodes Jason Pdirector | Sell | 5,019 | $21.10 |
| Jun 26, 2026 | Rhodes Jason Pdirector | Sell | 50,530 | $21.02 |
| Jun 26, 2026 | Rhodes Jason Pdirector | Sell | 25,397 | $21.02 |
| Jun 26, 2026 | Rhodes Jason Pdirector | Sell | 19,973 | $21.02 |
| Jun 26, 2026 | Lucera Erickofficer: Chief Financial Officer | Sell | 2,362 | $20.37 |
| Jun 26, 2026 | Rhodes Jason Pdirector | Sell | 77,855 | $21.13 |
| Jun 26, 2026 | Rhodes Jason Pdirector | Sell | 6,382 | $21.10 |
| Jun 26, 2026 | Rhodes Jason Pdirector | Sell | 30,774 | $21.13 |
| Jun 24, 2026 | Kersten Dirkdirector | Sell | 190,676 | $20.57 |
| Jun 24, 2026 | Kersten Dirkdirector | Sell | 1,657 | $21.47 |
| Jun 24, 2026 | Kersten Dirkdirector | Sell | 71,629 | $21.04 |
| Jun 23, 2026 | Greene Barry Edirector | Grant | 57,463 | $20.87 |
| Jun 22, 2026 | Kersten Dirkdirector | Sell | 37,454 | $20.14 |
| Jun 22, 2026 | Kersten Dirkdirector | Sell | 46,901 | $20.07 |
| Jun 17, 2026 | Kerr Douglasofficer: Chief Medical Officer | Sell | 887 | $18.33 |
| Jun 17, 2026 | Friedl-Naderer Johannaofficer: Chief Commercial Officer | Sell | 145 | $18.33 |
| Jun 17, 2026 | Cox Johndirector, officer: CEO & President | Sell | 2,683 | $18.33 |
| Jun 9, 2026 | Posner Brian Sdirector | Grant | 35,152 | $17.04 |
| Jun 9, 2026 | Stehman-Breen Catherinedirector | Grant | 35,152 | $17.04 |
| Jun 9, 2026 | Posner Brian Sdirector | Buy | 2,000 | $16.94 |
| Jun 9, 2026 | Rhodes Jason Pdirector | Grant | 35,152 | $17.04 |
| Jun 9, 2026 | Incerti Carlodirector | Grant | 35,152 | $17.04 |
Source: DYN SEC Form 4 filings, latest Jun 30, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their DYN positions over the last 6 months (SEC Form 13F).
Increased
208
New positions
93
Reduced
116
Sold out
73
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| T. ROWE PRICE INVESTMENT MANAGEMENT, INC. | Increased | 30.8M | May 15, 2026 |
| JANUS HENDERSON GROUP PLC | Increased | 27.3M | May 18, 2026 |
| T. ROWE PRICE INVESTMENT MANAGEMENT, INC. | Increased | 17.5M | Feb 19, 2026 |
| JANUS HENDERSON GROUP PLC | Reduced | 13.9M | Feb 17, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 12.8M | May 15, 2026 |
| BLACKROCK, INC. | Increased | 11.7M | May 13, 2026 |
| VANGUARD GROUP INC | Increased | 11.2M | Jan 29, 2026 |
| BLACKROCK, INC. | Increased | 11.2M | Feb 12, 2026 |
| PERCEPTIVE ADVISORS LLC | Increased | 9.3M | May 29, 2026 |
| ATLAS VENTURE LIFE SCIENCE ADVISORS, LLC | Unchanged | 9.1M | May 14, 2026 |
| ATLAS VENTURE LIFE SCIENCE ADVISORS, LLC | Unchanged | 9.1M | Feb 13, 2026 |
| FMR LLC | Increased | 8.9M | May 15, 2026 |
| ORBIS ALLAN GRAY LTD | Increased | 6.8M | May 15, 2026 |
| STATE STREET CORP | Increased | 6.7M | Feb 13, 2026 |
| STATE STREET CORP | Reduced | 6.7M | May 15, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.