John Cox Insider Trades & Stock Holdings

CEO & President · Dyne Therapeutics, Inc. · Latest filing Jun 16, 2026

John Cox, CEO & President at Dyne Therapeutics, Inc. has 1 Form 4 trade on file since Jun 16, 2026. Open-market activity: 0 purchases ($0) and 1 sale ($49.18K), net -$49.18K. Latest filing: disposed of 2.68K shares of $DYN on Jun 16, 2026 at $18.33.

Trades on file

1

Open-market bought

$0

Open-market sold

$49.18K

Net open-market

-$49.18K

Latest filing

Jun 16, 2026

All insider trades by John Cox

Date	Ticker	Type	Shares	Price	Value	Owned after	ΔOwn	1W	1M	6M	Role	Filing	Story
Jun 16, 2026	$DYN	Sell (Open-market sale) 10b5-1	2.68K	$18.33	$49.18K			+12.1%	+25.7%		CEO & President		—

"Buy" means shares acquired on the Form 4 (including grants and option exercises); "Sell" means shares disposed. 1W / 1M / 6M = how the stock moved after the trade.

Stocks John Cox traded

• $DYN

Frequently asked questions

Has John Cox been buying or selling stock?

John Cox has 0 open-market purchases and 1 open-market sale on file, net -$49.18K. Grants, option exercises and tax withholding are listed separately because they are not open-market trades.

What was John Cox's latest insider trade?

disposed of 2.68K shares of $DYN on Jun 16, 2026 at $18.33.

Data comes from public SEC Form 4 and 13F filings and STOCK Act disclosures. Dates are the trade or filing date reported. This page is for research only and is not investment advice.