Who
John B. Chang
VP & Chief Legal Officer
Company insider
Files Form 4 as: VP & Chief Legal Officer, Cogent Communications Holdings.
In numbers
- Trades disclosed
- 63
- Buys
- 0
- Sells
- 28
- Bought
- $0
- Sold
- $2.0M
- Companies
- 1
- Companies where not an officer
- 0
- First trade
- 2 Jan 2020
- Last trade
- 31 Dec 2025
- Last filed
- 5 Jan 2026
Companies traded
Activity over time
1 Nov 2024 – 1 Oct 2026
Buys above the line, sells below, each month.
Every trade
| Traded | Company | What | Amount | |
|---|---|---|---|---|
| 31 Dec 2025filed 5 Jan 2026 | CCOI Cogent Communications HoldingsTelecom Carriers | SEC FORM 4 Code A | —9,600 at $0.00 | filing |
| 31 Dec 2025filed 5 Jan 2026 | CCOI Cogent Communications HoldingsTelecom Carriers | SEC FORM 4 Code A | —100,000 at $0.00 | filing |
| 31 Dec 2025filed 5 Jan 2026 | CCOI Cogent Communications HoldingsTelecom Carriers | SEC FORM 4 Code A | —9,600 at $0.00 | filing |
| 31 Dec 2025filed 5 Jan 2026 | CCOI Cogent Communications HoldingsTelecom Carriers | SEC FORM 4 Code A | —100,000 at $0.00 | filing |
| 1 Dec 2025filed 2 Dec 2025 | CCOI Cogent Communications HoldingsTelecom Carriers | SEC FORM 4 Code A | —2,400 at $0.00 | filing |
| 2 Jun 2025filed 3 Jun 2025 | CCOI Cogent Communications HoldingsTelecom Carriers | SEC FORM 4 Code G | —398 at $0.00 | filing |
| 13 May 2025filed 15 May 2025 | CCOI Cogent Communications HoldingsTelecom Carriers | SEC FORM 4 Code G | —756 at $0.00 | filing |
| 13 May 2025filed 15 May 2025 | CCOI Cogent Communications HoldingsTelecom Carriers | SEC FORM 4 Code G | —504 at $0.00 | filing |
| 10 Apr 2025filed 11 Apr 2025 | CCOI Cogent Communications HoldingsTelecom Carriers | SEC FORM 4 Code G | —357 at $0.00 | filing |
| 10 Mar 2025filed 12 Mar 2025 | CCOI Cogent Communications HoldingsTelecom Carriers | SEC FORM 4 Code G | —357 at $0.00 | filing |
| 5 Mar 2025filed 7 Mar 2025 | CCOI Cogent Communications HoldingsTelecom Carriers | SEC FORM 4 Code G | —715 at $0.00 | filing |
| 5 Mar 2025filed 7 Mar 2025 | CCOI Cogent Communications HoldingsTelecom Carriers | SEC FORM 4 Code G | —715 at $0.00 | filing |
| 9 Jan 2025filed 13 Jan 2025 | CCOI Cogent Communications HoldingsTelecom Carriers | SEC FORM 4 Code A | —9,600 at $0.00 | filing |
| 18 Dec 2024filed 19 Dec 2024 | CCOI Cogent Communications HoldingsTelecom Carriers | SEC FORM 4 Code G | —970 at $0.00 | filing |
| 18 Dec 2024filed 19 Dec 2024 | CCOI Cogent Communications HoldingsTelecom Carriers | SEC FORM 4 Code G | —485 at $0.00 | filing |
| 18 Dec 2024filed 19 Dec 2024 | CCOI Cogent Communications HoldingsTelecom Carriers | SEC FORM 4 Code G | —485 at $0.00 | filing |
| 4 Dec 2024filed 6 Dec 2024 | CCOI Cogent Communications HoldingsTelecom Carriers | SEC FORM 4 Code G | —900 at $0.00 | filing |
| 1 Dec 2024filed 3 Dec 2024 | CCOI Cogent Communications HoldingsTelecom Carriers | SEC FORM 4 Code A | —2,400 at $0.00 | filing |
| 12 Nov 2024filed 12 Nov 2024 | CCOI Cogent Communications HoldingsTelecom Carriers | SEC FORM 4 Sold | $183K2,280 at $80.41 | filing |
| 12 Sep 2024filed 13 Sep 2024 | CCOI Cogent Communications HoldingsTelecom Carriers | SEC FORM 4 Sold | $100K1,400 at $71.67 | filing |
News
Cogent Communications to Host Third Quarter 2026 Earnings Call on November 5, 2026CCOI · prnewswire.com · 14 Oct 2026
0 headlines in the last 90 days name John B. Chang; 1 article from the last 14 days about the 1 company they traded most, at most three about any one of them.