COX JOHN

PrivateCIK: 1498428
Location

WALTHAM, MA

COX JOHN (CEO & President) sold 0.7% of their position (2.73K shares) of DYNE THERAPEUTICS, INC. on the open market

Open‑market sale worth $40.7K — 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
-2.73K
Net shares
Net seller
$40.7K
Total sold
1
Open market trades
0B · 1S
1
Total transactions
2.73K disposed
Non-Derivative Transactions1

Common Stock

Direct
S · Sale

Shares

2.73K

Price / share

$14.90

Trade value

$40.71K

% of position

0.7%
3/5/2026
376.88K374.14K
Total

Net shares

2.73K

Net value

-$40.71K

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 Mar 6, 2026 | Finecho