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)
DateInsiderTypeSharesPrice
Jun 30, 2026Rhodes Jason PdirectorSell162,954$21.28
Jun 30, 2026Rhodes Jason PdirectorSell102,969$21.14
Jun 30, 2026Rhodes Jason PdirectorSell81,903$21.28
Jun 30, 2026Rhodes Jason PdirectorSell40,702$21.14
Jun 30, 2026Rhodes Jason PdirectorSell64,411$21.28
Jun 30, 2026Rhodes Jason PdirectorSell51,756$21.14
Jun 26, 2026Rhodes Jason PdirectorSell39,131$21.13
Jun 26, 2026Rhodes Jason PdirectorSell12,699$21.10
Jun 26, 2026Rhodes Jason PdirectorSell5,019$21.10
Jun 26, 2026Rhodes Jason PdirectorSell50,530$21.02
Jun 26, 2026Rhodes Jason PdirectorSell25,397$21.02
Jun 26, 2026Rhodes Jason PdirectorSell19,973$21.02
Jun 26, 2026Lucera Erickofficer: Chief Financial OfficerSell2,362$20.37
Jun 26, 2026Rhodes Jason PdirectorSell77,855$21.13
Jun 26, 2026Rhodes Jason PdirectorSell6,382$21.10
Jun 26, 2026Rhodes Jason PdirectorSell30,774$21.13
Jun 24, 2026Kersten DirkdirectorSell190,676$20.57
Jun 24, 2026Kersten DirkdirectorSell1,657$21.47
Jun 24, 2026Kersten DirkdirectorSell71,629$21.04
Jun 23, 2026Greene Barry EdirectorGrant57,463$20.87
Jun 22, 2026Kersten DirkdirectorSell37,454$20.14
Jun 22, 2026Kersten DirkdirectorSell46,901$20.07
Jun 17, 2026Kerr Douglasofficer: Chief Medical OfficerSell887$18.33
Jun 17, 2026Friedl-Naderer Johannaofficer: Chief Commercial OfficerSell145$18.33
Jun 17, 2026Cox Johndirector, officer: CEO & PresidentSell2,683$18.33
Jun 9, 2026Posner Brian SdirectorGrant35,152$17.04
Jun 9, 2026Stehman-Breen CatherinedirectorGrant35,152$17.04
Jun 9, 2026Posner Brian SdirectorBuy2,000$16.94
Jun 9, 2026Rhodes Jason PdirectorGrant35,152$17.04
Jun 9, 2026Incerti CarlodirectorGrant35,152$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
InstitutionActionSharesFiled
T. ROWE PRICE INVESTMENT MANAGEMENT, INC.Increased30.8MMay 15, 2026
JANUS HENDERSON GROUP PLCIncreased27.3MMay 18, 2026
T. ROWE PRICE INVESTMENT MANAGEMENT, INC.Increased17.5MFeb 19, 2026
JANUS HENDERSON GROUP PLCReduced13.9MFeb 17, 2026
VANGUARD CAPITAL MANAGEMENT LLCNew Position12.8MMay 15, 2026
BLACKROCK, INC.Increased11.7MMay 13, 2026
VANGUARD GROUP INCIncreased11.2MJan 29, 2026
BLACKROCK, INC.Increased11.2MFeb 12, 2026
PERCEPTIVE ADVISORS LLCIncreased9.3MMay 29, 2026
ATLAS VENTURE LIFE SCIENCE ADVISORS, LLCUnchanged9.1MMay 14, 2026
ATLAS VENTURE LIFE SCIENCE ADVISORS, LLCUnchanged9.1MFeb 13, 2026
FMR LLCIncreased8.9MMay 15, 2026
ORBIS ALLAN GRAY LTDIncreased6.8MMay 15, 2026
STATE STREET CORPIncreased6.7MFeb 13, 2026
STATE STREET CORPReduced6.7MMay 15, 2026

Source: SEC Form 13F filings. For informational purposes only — not investment advice.