John B. Chang serves as Executive at COGENT COMMUNICATIONS HOLDINGS, INC., where they oversee executive responsibilities. Since joining the company, John B. Chang has executed 45 insider transactions totaling $1.9M, demonstrating a bearish approach to their equity position. Their most recent transaction on Dec 1, 2025 involved receiving (via award) 2,400 shares valued at $0.
John B. Chang currently holds 79,247 shares of COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, John B. Chang has been a net seller of CCOI stock. They have purchased $0 and sold $1.9M worth of shares.
John B. Chang's most recent insider trade was on Dec 1, 2025, when they sold 2,400 shares at $0.00 per share.
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| $71.67 |
| Discretionary |
| Aug 23, 2024 | CCOI | $152.1K | Sale | 2,055 | $74.00 | Discretionary |
| Feb 1, 2024 | CCOI | $0 | Gift | 375 | $N/A | Discretionary |
| Feb 1, 2024 | CCOI | $0 | Gift | 375 | $N/A | Discretionary |
| Jan 3, 2024 | CCOI | $0 | Award | 30,000 | $N/A | Discretionary |
| Jan 3, 2024 | CCOI | $0 | Award | 9,600 | $N/A | Discretionary |
| Jan 3, 2024 | CCOI | $0 | Award | 30,000 | $N/A | Discretionary |
| Jan 3, 2024 | CCOI | $0 | Award | 9,600 | $N/A | Discretionary |
| Dec 26, 2023 | CCOI | $269.8K | Sale | 3,550 | $76.00 | Planned |
| Dec 21, 2023 | CCOI | $74.0K | Sale | 1,000 | $74.00 | Planned |
| Dec 20, 2023 | CCOI | $0 | Gift | 450 | $N/A | Discretionary |
| Dec 20, 2023 | CCOI | $0 | Gift | 450 | $N/A | Discretionary |
| Dec 20, 2023 | CCOI | $0 | Gift | 900 | $N/A | Discretionary |
| Dec 14, 2023 | CCOI | $36.0K | Sale | 500 | $72.00 | Planned |
| Dec 11, 2023 | CCOI | $207.0K | Disposition | 3,000 | $69.00 | Discretionary |
| Dec 1, 2023 | CCOI | $0 | Award | 2,400 | $N/A | Planned |
| May 3, 2023 | CCOI | $185.0K | Sale | 2,500 | $74.00 | Planned |
| May 3, 2023 | CCOI | $180.0K | Sale | 2,500 | $72.00 | Planned |
| Apr 17, 2023 | CCOI | $35.0K | Sale | 500 | $70.00 | Planned |
| Feb 1, 2023 | CCOI | $140.0K | Sale | 2,000 | $70.00 | Discretionary |
| Jan 26, 2023 | CCOI | $34.0K | Sale | 500 | $68.00 | Discretionary |
| Jan 17, 2023 | CCOI | $66.0K | Sale | 1,000 | $66.00 | Discretionary |
| Jan 12, 2023 | CCOI | $96.0K | Sale | 1,500 | $64.00 | Discretionary |
| Jan 3, 2023 | CCOI | $0 | Award | 9,600 | $N/A | Discretionary |
| Dec 1, 2022 | CCOI | $0 | Award | 2,400 | $N/A | Discretionary |
| Apr 6, 2022 | CCOI | $18.0K | Sale | 250 | $72.00 | Discretionary |
| Apr 5, 2022 | CCOI | $17.5K | Sale | 250 | $70.00 | Discretionary |
| Apr 1, 2022 | CCOI | $10.2K | Sale | 150 | $68.00 | Discretionary |
| Mar 31, 2022 | CCOI | $9.9K | Sale | 150 | $66.00 | Discretionary |