Chang John B. (CIK 0001775672)

Latest company ownership

CCOI - COGENT COMMUNICATIONS HOLDINGS, INC.
Role: VP & CHIEF LEGAL OFFICER
Shares held
3,089
Last filed at
Dec 2, 2025
Confidence Score
49.9
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)
Nov 12, 2024 Nov 12, 2024 COGENT COMMUNICATIONS HOLDINGS, INC. VP & CHIEF LEGAL OFFICER Sell 22.5 -2,280 -3.15% ✗ $183.3K
Sep 12, 2024 Sep 13, 2024 COGENT COMMUNICATIONS HOLDINGS, INC. VP & CHIEF LEGAL OFFICER Sell 22.5 -1,400 -1.89% ✗ $100.3K
Aug 23, 2024 Aug 26, 2024 COGENT COMMUNICATIONS HOLDINGS, INC. VP & CHIEF LEGAL OFFICER Sell 22.5 -2,055 -2.71% ✗ $152.1K
Dec 26, 2023 Dec 28, 2023 COGENT COMMUNICATIONS HOLDINGS, INC. VP & CHIEF LEGAL OFFICER Sell 26.3 -3,550 -8.30% ✓ $269.8K
Dec 21, 2023 Dec 22, 2023 COGENT COMMUNICATIONS HOLDINGS, INC. VP & CHIEF LEGAL OFFICER Sell 41.3 -1,000 -2.29% ✓ $74K
Dec 14, 2023 Dec 15, 2023 COGENT COMMUNICATIONS HOLDINGS, INC. VP & CHIEF LEGAL OFFICER Sell 26.3 -500 -1.13% ✗ $36K
Dec 11, 2023 Dec 11, 2023 COGENT COMMUNICATIONS HOLDINGS, INC. VP & CHIEF LEGAL OFFICER Sell 22.5 -3,000 -6.35% ✗ $207K
May 3, 2023 May 4, 2023 COGENT COMMUNICATIONS HOLDINGS, INC. VP & CHIEF LEGAL OFFICER Sell 22.5 -5,000 -10.56% ✓ $365K
Apr 17, 2023 Apr 18, 2023 COGENT COMMUNICATIONS HOLDINGS, INC. VP & CHIEF LEGAL OFFICER Sell 48.8 -500 -1.04% ✓ $35K
Feb 1, 2023 Feb 2, 2023 COGENT COMMUNICATIONS HOLDINGS, INC. Chief Legal Officer Sell 37.5 -2,000 -4.01% ✓ $140K
Jan 26, 2023 Jan 27, 2023 COGENT COMMUNICATIONS HOLDINGS, INC. Chief Legal Officer Sell 51.3 -500 -0.99% ✓ $34K
Jan 17, 2023 Jan 18, 2023 COGENT COMMUNICATIONS HOLDINGS, INC. Chief Legal Officer Sell 45.0 -1,000 -1.95% ✓ $66K
Jan 12, 2023 Jan 13, 2023 COGENT COMMUNICATIONS HOLDINGS, INC. Chief Legal Officer Sell 41.3 -1,500 -2.84% ✓ $96K
Apr 5, 2022 Apr 7, 2022 COGENT COMMUNICATIONS HOLDINGS, INC. Director Sell 48.8 -500 -1.21% ✓ $35.5K
Apr 1, 2022 Apr 4, 2022 COGENT COMMUNICATIONS HOLDINGS, INC. Director Sell 52.5 -150 -0.36% ✓ $10.2K
Mar 31, 2022 Apr 1, 2022 COGENT COMMUNICATIONS HOLDINGS, INC. VP & Chief Legal Officer Sell 53.8 -150 -0.36% ✓ $9.9K
Mar 17, 2022 Mar 18, 2022 COGENT COMMUNICATIONS HOLDINGS, INC. VP & Chief Legal Officer Sell 48.8 -600 -1.42% ✓ $37.8K
May 10, 2021 May 11, 2021 COGENT COMMUNICATIONS HOLDINGS, INC. VP & Chief Legal Officer Sell 48.8 -558 -1.68% ✓ $44.6K
Apr 30, 2021 May 3, 2021 COGENT COMMUNICATIONS HOLDINGS, INC. VP & Chief Legal Officer Sell 48.8 -558 -1.65% ✓ $41.9K
Apr 5, 2021 Apr 6, 2021 COGENT COMMUNICATIONS HOLDINGS, INC. VP & Chief Legal Officer Sell 48.8 -558 -1.63% ✓ $39.1K
Mar 15, 2021 Mar 16, 2021 COGENT COMMUNICATIONS HOLDINGS, INC. VP & Chief Legal Officer Sell 48.8 -558 -1.60% ✓ $36.3K
Jan 4, 2021 Jan 5, 2021 COGENT COMMUNICATIONS HOLDINGS, INC. VP & Chief Legal Officer Sell 45.0 -558 -2.16% ✓ $33.5K
Sep 1, 2020 Sep 1, 2020 COGENT COMMUNICATIONS HOLDINGS, INC. VP & Chief Legal Officer Sell 51.3 -150 -0.58% ✓ $10.1K
Jul 31, 2020 Jul 31, 2020 COGENT COMMUNICATIONS HOLDINGS, INC. VP & Chief Legal Officer Sell 48.8 -500 -1.89% ✓ $45K
Jul 21, 2020 Jul 22, 2020 COGENT COMMUNICATIONS HOLDINGS, INC. VP & Chief Legal Officer Sell 48.8 -500 -1.85% ✓ $42.5K
Mar 3, 2020 Mar 4, 2020 COGENT COMMUNICATIONS HOLDINGS, INC. VP & Chief Legal Officer Sell 45.0 -600 -2.17% ✓ $48.8K
Mar 2, 2020 Mar 3, 2020 COGENT COMMUNICATIONS HOLDINGS, INC. VP & Chief Legal Officer Sell 48.8 -300 -1.08% ✓ $23K
Jan 2, 2020 Jan 3, 2020 COGENT COMMUNICATIONS HOLDINGS, INC. VP & Chief Legal Officer Sell 45.0 -534 -2.84% ✓ $35K