John Cox - Insider Trading & Ownership

Location
C/O Bioverativ Inc., 225 Second Avenue, Waltham, MA
Summary
The estimated net worth of John Cox is at least $3.58M dollars as of September 9, 2025. John Cox is the CEO & President, Director of Dyne Therapeutics, Inc. and owns shares of Dyne Therapeutics, Inc. (DYN) stock worth about $3.58M.
Signature
/s/ Ron Caponigro, Attorney-in-Fact
All Insider Reports
All Insider Reports

Ownership of John Cox

Symbol Company Relationship Holdings Value Past Year Net Change Change % Report Period
DYN Dyne Therapeutics, Inc. CEO & President, Director $3.58M +$773K +27.5% Sep 5, 2025
SGTX Sigilon Therapeutics, Inc. Director Aug 11, 2023

Insider Transactions Reported by John Cox:

Sym Company Class Transaction % Value $ * Price $ Shares Shares After Date Ownership
* An asterisk sign (*) next to the price indicates that the price is likely invalid.