COX JOHN

PrivateCIK: 1498428
Location

WALTHAM, MA

COX JOHN (CEO & President) sold 0.7% of their position (2.68K shares) of DYNE THERAPEUTICS, INC. on the open market

Open‑market sale worth $49.2K — a minor trim. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 1 sale
InsiderCOX JOHNCIK 1498428
IssuerDYNE THERAPEUTICS, INC.CIK 1818794
DirectorOfficer· CEO & President
Since Mar 2026
-2.68K
Net shares
Net seller
$49.2K
Total sold
1
Open market trades
0B · 1S
1
Total transactions
2.68K disposed
Non-Derivative Transactions1

Common Stock

Direct
S · Sale

Shares

2.68K

Price / share

$18.33

Trade value

$49.18K

% of position

0.7%
6/16/2026
370.83K368.15K
Total

Net shares

2.68K

Net value

-$49.18K

Derivative Transactions0
No derivative transactions reported
Non-Derivative Holdings (Post-Transaction)4

Common Stock

Indirect
Shares owned18K

Common Stock

Indirect
Shares owned18K

Common Stock

Indirect
Shares owned18K

Common Stock

Indirect
Shares owned18K
Total
72K indirect72K
Derivative Holdings (Post-Transaction)0
No derivative holdings reported
COX JOHN — Insider Transaction (Form 4) Filed Jun 17, 2026 | Finecho