John Cox bought $911K of Dyne Therapeutics (DYN)

Executed Jul 14 2025, disclosed Jul 15 2025, 1 day later.

Value, as filed

$911K

100,000 sh × $9.11

Executed

Jul 14 2025

the trade date, as filed

Disclosed

Jul 15 2025

1 day after the trade

Return, 21 sessionsiFrom the disclosed entry session; derived

+28.5%

+30.1% from execution

Over the 21 trading sessions from the disclosed entry session (Jul 15 2025), the stock returned +28.5% (delay-adjusted); from the execution session (Jul 14 2025), +30.1%. Derived: entry at the session's open, exit at the close 20 sessions later.

The filer

John Cox CEO & President profile →

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.

The name

DYN

Dyne Therapeutics, Inc. DYN · Healthcare · 31 filings in 24 months ticker →

Healthcare · Dyne Therapeutics, Inc., a clinical-stage neuromuscular disease company, focuses on discovering and developing therapeutics for neuromuscul…

More Healthcare filings→ Insider filings, newest first→ View the original filing at www.sec.gov→

Other filings by John Cox in DYN

DYNSALE Dyne Therapeutics, Inc. $107K
5,658 sh × $18.88
Exec Sep 8
Filed Sep 8 · 4:13 PM ET DYNSALE Dyne Therapeutics, Inc. $131K
4,986 sh × $26.28
Exec Aug 13
Filed Aug 17 · 4:07 PM ET