COX JOHN

PrivateCIK: 1498428
Location

WALTHAM, MA

COX JOHN (CEO & President) sold 0.9% of their position (3.31K shares) of DYNE THERAPEUTICS, INC. on the open market

Open‑market sale worth $60.8K — 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
-3.31K
Net shares
Net seller
$60.8K
Total sold
1
Open market trades
0B · 1S
1
Total transactions
3.31K disposed
Non-Derivative Transactions1

Common Stock

Direct
S · Sale

Shares

3.31K

Price / share

$18.36

Trade value

$60.79K

% of position

0.9%
5/13/2026
374.14K370.83K
Total

Net shares

3.31K

Net value

-$60.79K

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 May 14, 2026 | Finecho