Cox John

CIK 00014984285 companiesWALTHAM, MA

SEC Profile

Transactions

Companies

Filings

CIK

0001498428

Recent Transactions

50 trades

Sale
Dyne Therapeutics, Inc.$DYN
Common Stock
2026-03-05$14.90/sh−2,732→ 374,145 total
Sale
Dyne Therapeutics, Inc.$DYN
Common Stock
2025-12-05$20.72/sh−2,662→ 196,877 total
Sale
Dyne Therapeutics, Inc.$DYN
Common Stock
2025-09-05$13.41/sh−2,640→ 199,539 total
Award
Dyne Therapeutics, Inc.$DYN
Stock option (right to buy)
2025-07-16+197,285→ 197,285 total
Gift
Dyne Therapeutics, Inc.$DYN
Common Stock
2025-07-15−10,000→ 222,179 total
Gift
Dyne Therapeutics, Inc.$DYN
Common Stock
2025-07-15−10,000→ 212,179 total
Gift
Dyne Therapeutics, Inc.$DYN
Common Stock
2025-07-15−10,000→ 202,179 total
Gift
Dyne Therapeutics, Inc.$DYN
Common Stock
2025-07-15−10,000→ 232,179 total
Purchase
Dyne Therapeutics, Inc.$DYN
Common Stock
2025-07-14$9.11/sh+100,000→ 242,179 total
Sale
Dyne Therapeutics, Inc.$DYN
Common Stock
2025-06-05$13.35/sh−4,060→ 142,179 total
Sale
Dyne Therapeutics, Inc.$DYN
Common Stock
2025-03-05$11.83/sh−4,061→ 146,239 total
Award
Dyne Therapeutics, Inc.$DYN
Stock option (right to buy)
2024-12-04+232,100→ 232,100 total
Award
Dyne Therapeutics, Inc.$DYN
Common Stock
2024-12-04+145,300→ 150,300 total
Purchase
Dyne Therapeutics, Inc.$DYN
Common Stock
2024-09-04$32.57/sh+800→ 800 total
Purchase
Dyne Therapeutics, Inc.$DYN
Common Stock
2024-09-04$33.09/sh+7,200→ 8,000 total
Purchase
Dyne Therapeutics, Inc.$DYN
Common Stock
2024-09-04$32.57/sh+800→ 800 total
Purchase
Dyne Therapeutics, Inc.$DYN
Common Stock
2024-09-04$32.57/sh+800→ 800 total
Purchase
Dyne Therapeutics, Inc.$DYN
Common Stock
2024-09-04$33.09/sh+7,200→ 8,000 total
Purchase
Dyne Therapeutics, Inc.$DYN
Common Stock
2024-09-04$33.09/sh+7,200→ 8,000 total
Purchase
Dyne Therapeutics, Inc.$DYN
Common Stock
2024-09-04$32.57/sh+800→ 800 total
Purchase
Dyne Therapeutics, Inc.$DYN
Common Stock
2024-09-04$33.09/sh+7,200→ 8,000 total
Award
Dyne Therapeutics, Inc.$DYN
Stock Option (Right to Buy)
2024-03-25+679,853→ 679,853 total
Disposition to Issuer
Sigilon Therapeutics, Inc.
Common Stock
2023-08-11−341→ 0 total
Disposition to Issuer
Sigilon Therapeutics, Inc.
Stock Option (Right to Buy)
2023-08-11$5.00/sh−683→ 0 total
Disposition to Issuer
Sigilon Therapeutics, Inc.
Stock Option (Right to Buy)
2023-08-11$6.64/sh−683→ 0 total
Award
Sigilon Therapeutics, Inc.
Stock Option (Right to Buy)
2023-05-19+8,888→ 8,888 total
Award
Sigilon Therapeutics, Inc.
Stock Option (Right to Buy)
2022-05-26+8,888→ 8,888 total
Award
Sigilon Therapeutics, Inc.
Stock Option (Right to Buy)
2021-06-24$9.97/sh+8,888→ 8,888 total
Conversion
Sigilon Therapeutics, Inc.
Series B-1 Convertible Preferred Stock
2020-12-08−4,444→ 0 total
Conversion
Sigilon Therapeutics, Inc.
Common Stock
2020-12-08+4,444→ 4,444 total
Sale
REPLIGEN CORP$RGEN
Common Stock
2020-03-24$96.72/sh−1,858→ 923 total
Sale
REPLIGEN CORP$RGEN
Common Stock
2020-03-18$97.17/sh−1,016→ 2,781 total
Sale
REPLIGEN CORP$RGEN
Common Stock
2020-03-18$96.45/sh−1,187→ 3,797 total
Sale
REPLIGEN CORP$RGEN
Common Stock
2020-03-18$95.13/sh−24,533→ 4,984 total
Exercise/Conversion
REPLIGEN CORP$RGEN
Common Stock
2020-03-18$42.07/sh+3,304→ 29,517 total
Exercise/Conversion
REPLIGEN CORP$RGEN
Common Stock
2020-03-18$38.76/sh+2,434→ 26,213 total
Exercise/Conversion
REPLIGEN CORP$RGEN
Common Stock
2020-03-18$26.12/sh+3,366→ 23,779 total
Exercise/Conversion
REPLIGEN CORP$RGEN
Common Stock
2020-03-18$12.91/sh+14,000→ 16,781 total
Exercise/Conversion
REPLIGEN CORP$RGEN
Common Stock
2020-03-18$41.19/sh+3,632→ 20,413 total
Exercise/Conversion
REPLIGEN CORP$RGEN
Stock Option (Right to Buy)
2020-03-18−14,000→ 0 total
Exercise/Conversion
REPLIGEN CORP$RGEN
Stock Option (Right to Buy)
2020-03-18−3,304→ 0 total
Exercise/Conversion
REPLIGEN CORP$RGEN
Stock Option (Right to Buy)
2020-03-18−2,434→ 0 total
Exercise/Conversion
REPLIGEN CORP$RGEN
Stock Option (Right to Buy)
2020-03-18−3,366→ 0 total
Exercise/Conversion
REPLIGEN CORP$RGEN
Stock Option (Right to Buy)
2020-03-18−3,632→ 0 total
Exercise/Conversion
REPLIGEN CORP$RGEN
Stock Option (Right to Buy)
2020-03-04−10,000→ 14,000 total
Sale
REPLIGEN CORP$RGEN
Common Stock
2020-03-04$93.39/sh−10,000→ 2,781 total
Exercise/Conversion
REPLIGEN CORP$RGEN
Common Stock
2020-03-04$12.91/sh+10,000→ 12,781 total
Sale
REPLIGEN CORP$RGEN
Common Stock
2020-02-24$92.76/sh−4,355→ 2,781 total
Sale
REPLIGEN CORP$RGEN
Common Stock
2020-02-24$94.85/sh−100→ 7,136 total
Award
REPLIGEN CORP$RGEN
Common Stock
2019-05-15+923→ 7,236 total

Companies

Recent Filings

Address

C/O DYNE THERAPEUTICS, INC. 1560 TRAPELO ROAD

WALTHAM, MA, 02451

View on SEC.gov