Cox John (CIK 0001498428)

Latest company ownership

Shares held
271,539
Last filed at
Dec 5, 2025
Confidence Score
57.7
2025Q4
Confidence Score History
2024Q3 2025Q4
BIIB - BIOGEN INC.
Role: EVP Pharmaceutical Oper & Tech
Shares held
39,045.24
Last filed at
Apr 5, 2016
Confidence Score
50.0
2025Q4
Confidence Score History
2014Q1 2025Q4
RGEN - REPLIGEN CORP
Role: Director
Shares held
923
Last filed at
Mar 26, 2020
Confidence Score
50.0
2025Q4
Confidence Score History
2020Q1 2025Q4

Recent buy/sell transactions

Exec date Filing date Company Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Dec 5, 2025 Dec 5, 2025 Dyne Therapeutics, Inc. CEO Sell 47.5 -2,662 -0.98% ✓ $55.2K
Sep 5, 2025 Sep 9, 2025 Dyne Therapeutics, Inc. CEO Sell 51.3 -2,640 -0.96% ✓ $35.4K
Jul 14, 2025 Jul 15, 2025 Dyne Therapeutics, Inc. CEO Buy 97.5 +60,000 28.01% ✗ $911K
Jun 5, 2025 Jun 6, 2025 Dyne Therapeutics, Inc. CEO Sell 41.3 -4,060 -2.28% ✓ $54.2K
Mar 5, 2025 Mar 7, 2025 Dyne Therapeutics, Inc. CEO Sell 45.0 -4,061 -2.23% ✓ $48K
Sep 4, 2024 Sep 4, 2024 Dyne Therapeutics, Inc. CEO Buy 100.0 +32,000 640.00% ✗ $1.1M
Mar 24, 2020 Mar 26, 2020 REPLIGEN CORP Director Sell 22.5 -1,858 -66.81% ✗ $179.7K
Mar 18, 2020 Mar 20, 2020 REPLIGEN CORP Director Sell 17.5 -26,736 -90.58% ✗ $2.5M
Mar 4, 2020 Mar 5, 2020 REPLIGEN CORP Director Sell 20.0 -10,000 -78.24% ✗ $933.9K
Feb 24, 2020 Feb 26, 2020 REPLIGEN CORP Director Sell 20.0 -4,455 -61.57% ✗ $413.5K
Feb 23, 2016 Feb 25, 2016 BIOGEN INC. EVP Pharmaceutical Oper & Tech Sell 22.5 -382 -1.24% ✗ $98.9K
Feb 12, 2016 Feb 17, 2016 BIOGEN INC. EVP Pharmaceutical Oper & Tech Sell 20.0 -1,552 -2.56% ✗ $383.7K
Feb 8, 2016 Feb 9, 2016 BIOGEN INC. EVP Pharmaceutical Oper & Tech Sell 20.0 -1,324 -4.46% ✗ $332K
Mar 25, 2015 Mar 26, 2015 BIOGEN INC. EVP Pharmaceutical Oper & Tech Sell 3.8 -12,010 -31.96% ✓ $5.4M
Feb 12, 2015 Feb 17, 2015 BIOGEN INC. EVP Pharmaceutical Oper & Tech Sell 20.0 -1,761 -2.67% ✗ $690.5K
Feb 8, 2015 Feb 10, 2015 BIOGEN INC. EVP Pharmaceutical Oper & Tech Sell 17.5 -3,747 -6.01% ✗ $1.5M
Feb 23, 2014 Feb 25, 2014 BIOGEN INC. EVP Pharmaceutical Oper & Tech Sell 20.0 -1,228 -4.60% ✗ $426.3K
Feb 12, 2014 Feb 14, 2014 BIOGEN INC. EVP Pharmaceutical Oper & Tech Sell 20.0 -1,059 -4.21% ✗ $342.1K
Feb 8, 2014 Feb 11, 2014 BIOGEN INC. EVP Pharmaceutical Oper & Tech Sell 17.5 -3,653 -7.77% ✗ $1.2M