John Cox

Insider Reports History

Location
C/O Bioverativ Inc., 225 Second Avenue, Waltham, MA
Signature
/s/ Ron Caponigro, Attorney-in-Fact
All insider transactions
Transactions in reports broken out by “transaction date” reported in original SEC filing, see here for transactions aggregated across transaction date

Holdings reported by John Cox:

Stock Role Class Num Shares Value Price $ Report Date Ownership
Dyne Therapeutics, Inc. CEO & President, Director Common Stock 200K $2.68M $13.41 Sep 5, 2025 Direct
Dyne Therapeutics, Inc. CEO & President, Director Common Stock 18K $226K $12.58 Sep 5, 2025 By Trust #1
Dyne Therapeutics, Inc. CEO & President, Director Common Stock 18K $226K $12.58 Sep 5, 2025 By Trust #2
Dyne Therapeutics, Inc. CEO & President, Director Common Stock 18K $226K $12.58 Sep 5, 2025 By Trust #3
Dyne Therapeutics, Inc. CEO & President, Director Common Stock 18K $226K $12.58 Sep 5, 2025 By Trust #4
Dyne Therapeutics, Inc. CEO & President, Director Stock option (right to buy) 197K Jul 16, 2025 Direct
Sigilon Therapeutics, Inc. Director Common Stock 0 $14.92 Aug 11, 2023 Direct
Sigilon Therapeutics, Inc. Director Stock Option (Right to Buy) 0 $6.64 Aug 11, 2023 Direct

Insider Reports Filed by John Cox

Symbol Company Period Transactions Value $ Form Type Date Filed Role
DYN Dyne Therapeutics, Inc. Sep 5, 2025 1 -$35.4K 4 Sep 9, 2025 CEO & President, Director
DYN Dyne Therapeutics, Inc. Jul 16, 2025 1 $0 4 Jul 18, 2025 CEO & President, Director
DYN Dyne Therapeutics, Inc. Jul 14, 2025 5 $911K 4 Jul 15, 2025 CEO & President, Director
DYN Dyne Therapeutics, Inc. Jun 5, 2025 1 -$54.2K 4 Jun 6, 2025 CEO & President, Director
DYN Dyne Therapeutics, Inc. Mar 5, 2025 1 -$48K 4 Mar 7, 2025 CEO & President, Director
DYN Dyne Therapeutics, Inc. Dec 4, 2024 2 $0 4 Dec 6, 2024 CEO & President, Director
DYN Dyne Therapeutics, Inc. Sep 4, 2024 8 $1.06M 4 Sep 4, 2024 CEO & President, Director
DYN Dyne Therapeutics, Inc. Mar 25, 2024 0 $0 3/A Apr 4, 2024 CEO & President, Director
DYN Dyne Therapeutics, Inc. Mar 25, 2024 1 $0 4 Mar 27, 2024 Chief Executive Officer and President, Director
DYN Dyne Therapeutics, Inc. Mar 25, 2024 0 $0 3 Mar 27, 2024 Chief Executive Officer and President Exhibit Index: 24.1 Power of Attorney, Director
SGTX Sigilon Therapeutics, Inc. Aug 11, 2023 3 -$7.95K 4 Aug 11, 2023 Director
SGTX Sigilon Therapeutics, Inc. May 19, 2023 1 $0 4 May 22, 2023 Director
SGTX Sigilon Therapeutics, Inc. May 26, 2022 1 $0 4 May 27, 2022 Director
SGTX Sigilon Therapeutics, Inc. Jun 24, 2021 1 $88.6K 4 Jun 28, 2021 Director