John Cox Dyne Therapeutics, Inc. (DYN) insider trading activity

DYN Quotes by TradingView

John Cox is CEO & President of Dyne Therapeutics, Inc.. Currently has a direct ownership of 199,539 shares of DYN, which is worth approximately $2.62 Million. The most recent transaction as insider was on Sep 05, 2025, when has been sold 2,640 shares (Common Stock) at a price of $13.41 per share, resulting in proceeds of $35,402. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 200K
40.34% 3M change
n/a 12M change
Total Value Held $2.62 Million

John Cox Transaction History

Date Transaction Value Shares Traded Shares Held Form
Sep 05 2025
SELL
Open market or private sale
$35,402 $13.41 p/Share
2,640 Reduced 1.31%
199,539 Common Stock
Jul 15 2025
SELL
Bona fide gift
-
40,000 Reduced 16.52%
202,179 Common Stock
Jul 14 2025
BUY
Open market or private purchase
$911,000 $9.11 p/Share
100,000 Added 29.22%
242,179 Common Stock
Jun 05 2025
SELL
Open market or private sale
$54,201 $13.35 p/Share
4,060 Reduced 2.78%
142,179 Common Stock
Mar 05 2025
SELL
Open market or private sale
$48,041 $11.83 p/Share
4,061 Reduced 2.7%
146,239 Common Stock
Dec 04 2024
BUY
Grant, award, or other acquisition
-
145,300 Added 49.15%
150,300 Common Stock

Also insider at

SGTX
Sigilon Therapeutics, Inc. Healthcare
JC

John Cox

CEO & President
Cambridge, MA

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