John Cox

CEO & President

John Cox (CEO & President) filed 2 Form 4 reports in the trailing twelve months (0 purchases, 2 sales), most often in Dyne Therapeutics, Inc. (DYN). The largest single filing was $131K of DYN (4,986 sh × $26.28, as filed), executed Aug 13.

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Return, ttmiAverage return per filing, trailing twelve months

–

no purchases on file

Delay-adjustediThe same average, entered at disclosure dates

–

returns measure stock purchases only

Filings, ttm

0 buys · 2 sells

Median delay

–

execution → disclosure

Volume, ttmiDollar value disclosed in the trailing twelve months

$238K

shares × price, as filed

Last traded

Sep 8

Filed Sep 8

Median ADV $59.6M across their filed names

Open performance→

Volume by month

Buys $911K Sells $238K

Shares × price, as filed · by filing month · past 24 months

Sectors filed on

Healthcare 2 filings

Sector per market data · by filing · past 12 months

Most traded names

DYN

Dyne Therapeutics, Inc. DYN · 1 buy · 2 sells 3 filings

Recent filings

DYNSALE Dyne Therapeutics, Inc. View filing → $107K
5,658 sh × $18.88
Exec Sep 8
Filed Sep 8 · 4:13 PM ET DYNSALE Dyne Therapeutics, Inc. View filing → $131K
4,986 sh × $26.28
Exec Aug 13
Filed Aug 17 · 4:07 PM ET DYNPURCHASE Dyne Therapeutics, Inc. View filing → $911K
100,000 sh × $9.11
Exec Jul 14 2025
Filed Jul 15 2025 · 5:11 PM ET