Cox John

Cox John accounts for 5 disclosed filings worth $2.9M, all concentrated in Dyne Therapeutics, Inc. (DYN), active 2025–2026. The record is heavily weighted toward buying, with $911.0K in purchases against $139.7K in sales. The largest single open-market purchase on record is $911.0K in Dyne Therapeutics, Inc.. Data is sourced from official SEC Form 3, 4, and 5 filings.