COX JOHN

PrivateCIK: 1498428
Location

WALTHAM, MA

Senior insider sale

CEO & President at DYNE THERAPEUTICS, INC. — senior position signals high conviction

$110.0K

5.99K shares

What this filing means

COX JOHN plans to sell 5.99K shares of DYNE THERAPEUTICS, INC. valued at approximately $110.0K. Form 144 is a notice of intent to sell restricted or control securities — not a mandatory transaction. This filing provides advance warning of potential selling pressure.

InsiderCOX JOHNCIK 1498428
IssuerDYNE THERAPEUTICS, INC.CIK 1818794
DirectorOfficer· CEO & President
Since Mar 2026
5.99K
Shares to sell
$110.0K
Approx. market value
9.08K
Acquired (3 months)
1
Planned
1 completed
Securities Acquired — Last 3 Months1
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Restricted Stock Units

Equity Compensation

6/4/2026
9.08K
Total acquired9.08K
Planned & Completed Dispositions2
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Completed

Completed

Units to sell

3.31K

Market value

$60.8K

5/13/2026

Planned — Approximate Date

NasdaqPlanned

Units to sell

2.68K

Market value

$49.2K

6/16/2026
Total

Units

5.99K

Value

$110.0K

COX JOHN — Planned Insider Sale (Form 144) | Finecho