Chang John B. has filed 41 insider transactions across 1 company since January 2023.
Most recent transaction: a grant/award of 100000 shares of COGENT COMMUNICATIONS HOLDINGS, INC. ($CCOI) on December 31, 2025.
Activity breakdown: 0 open-market purchases and 13 sales.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dec. 31, 2025 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | A | common stock | 100000 | $0.00 | 190,717.0000 | 47,603,287 | 110.23% | 0.21% |
| Dec. 31, 2025 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | A | common stock | 9600 | $0.00 | 90,717.0000 | 47,603,287 | 11.83% | 0.02% |
| Dec. 1, 2025 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | A | common stock | 2400 | $0.00 | 82,336.0000 | 47,603,287 | 3.00% | 0.01% |
| June 2, 2025 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | G | common stock | 398 | $0.00 | 79,936.0000 | 47,676,735 | 0.50% | 0.00% |
| May 13, 2025 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | G | common stock | 756 | $0.00 | 80,334.0000 | 47,676,735 | 0.93% | 0.00% |
| May 13, 2025 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | G | common stock | 504 | $0.00 | 80,334.0000 | 47,676,735 | 0.63% | 0.00% |
| April 10, 2025 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | G | common stock | 357 | $0.00 | 80,586.0000 | 47,676,735 | 0.44% | 0.00% |
| March 10, 2025 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | G | common stock | 357 | $0.00 | 80,943.0000 | 47,627,873 | 0.44% | 0.00% |
| March 5, 2025 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | G | common stock | 715 | $0.00 | 81,300.0000 | 47,627,873 | 0.87% | 0.00% |
| March 5, 2025 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | G | common stock | 715 | $0.00 | 81,300.0000 | 47,627,873 | 0.89% | 0.00% |
| Jan. 9, 2025 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | A | common stock | 9600 | $0.00 | 81,300.0000 | 47,627,873 | 13.39% | 0.02% |
| Dec. 18, 2024 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | G | common stock | 970 | $0.00 | 70,765.0000 | 47,426,131 | 1.35% | 0.00% |
| Dec. 18, 2024 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | G | common stock | 485 | $0.00 | 70,765.0000 | 47,426,131 | 0.69% | 0.00% |
| Dec. 18, 2024 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | G | common stock | 485 | $0.00 | 70,765.0000 | 47,426,131 | 0.69% | 0.00% |
| Dec. 4, 2024 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | G | common stock | 900 | $0.00 | 71,700.0000 | 47,426,131 | 1.24% | 0.00% |
| Dec. 1, 2024 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | A | common stock | 2400 | $0.00 | 72,600.0000 | 47,426,131 | 3.42% | 0.01% |
| Nov. 12, 2024 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | S | common stock | 2280 | $80.41 | 70,200.0000 | 47,426,131 | 3.15% | 0.00% |
| Sept. 12, 2024 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | S | common stock | 1400 | $71.67 | 72,480.0000 | 47,511,613 | 1.89% | 0.00% |
| Aug. 23, 2024 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | S | common stock | 2055 | $74.00 | 73,880.0000 | 47,511,613 | 2.71% | 0.00% |
| Feb. 1, 2024 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | G | common stock | 375 | $0.00 | 76,310.0000 | 47,837,512 | 0.49% | 0.00% |
| Feb. 1, 2024 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | G | common stock | 375 | $0.00 | 76,310.0000 | 47,837,512 | 0.49% | 0.00% |
| Jan. 3, 2024 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | A | common stock | 9600 | $0.00 | 46,310.0000 | 47,837,512 | 26.15% | 0.02% |
| Jan. 3, 2024 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | A | common stock | 30000 | $0.00 | 76,310.0000 | 47,837,512 | 64.78% | 0.06% |
| Jan. 3, 2024 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | A | common stock | 9600 | $0.00 | 48,810.0000 | 47,837,512 | 24.48% | 0.02% |
| Jan. 3, 2024 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | A | common stock | 30000 | $0.00 | 78,810.0000 | 47,837,512 | 61.46% | 0.06% |
| Dec. 26, 2023 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | S | common stock | 3550 | $76.00 | 39,210.0000 | 47,227,338 | 8.30% | 0.01% |
| Dec. 21, 2023 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | S | common stock | 1000 | $74.00 | 42,760.0000 | 47,227,338 | 2.29% | 0.00% |
| Dec. 20, 2023 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | G | common stock | 900 | $0.00 | 43,760.0000 | 47,227,338 | 2.02% | 0.00% |
| Dec. 20, 2023 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | G | common stock | 450 | $0.00 | 43,760.0000 | 47,227,338 | 1.04% | 0.00% |
| Dec. 20, 2023 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | G | common stock | 450 | $0.00 | 43,760.0000 | 47,227,338 | 1.04% | 0.00% |
| Dec. 14, 2023 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | S | common stock | 500 | $72.00 | 43,760.0000 | 47,227,338 | 1.13% | 0.00% |
| Dec. 11, 2023 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | D | common stock | 3000 | $69.00 | 44,260.0000 | 47,227,338 | 6.35% | 0.01% |
| Dec. 1, 2023 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | A | common stock | 2400 | $0.00 | 47,260.0000 | 47,227,338 | 5.35% | 0.01% |
| May 3, 2023 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | S | common stock | 2500 | $74.00 | 42,360.0000 | 47,381,226 | 5.57% | 0.01% |
| May 3, 2023 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | S | common stock | 2500 | $72.00 | 44,860.0000 | 47,381,226 | 5.28% | 0.01% |
| April 17, 2023 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | VP & CHIEF LEGAL OFFICER | S | common stock | 500 | $70.00 | 47,360.0000 | 47,381,226 | 1.04% | 0.00% |
| Feb. 1, 2023 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | Chief Legal Officer | S | common stock | 2000 | $70.00 | 47,860.0000 | 47,207,298 | 4.01% | 0.00% |
| Jan. 26, 2023 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | Chief Legal Officer | S | common stock | 500 | $68.00 | 49,860.0000 | 47,207,298 | 0.99% | 0.00% |
| Jan. 17, 2023 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | Chief Legal Officer | S | common stock | 1000 | $66.00 | 50,360.0000 | 47,207,298 | 1.95% | 0.00% |
| Jan. 12, 2023 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | Chief Legal Officer | S | common stock | 1500 | $64.00 | 51,360.0000 | 47,207,298 | 2.84% | 0.00% |
| Jan. 3, 2023 | COGENT COMMUNICATIONS HOLDINGS, INC. | $CCOI | Chang John B. | Chief Legal Officer | A | common stock | 9600 | $0.00 | 52,860.0000 | 47,207,298 | 22.19% | 0.02% |