Real time Form 13D and 13G transaction reports:
- Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
- Due to inconsistent filing format, it is highly recommended that you read the orignal filing form.
- Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
- Peter Lynch
What is insider trading>>
| Reported DateTime | Type | Company Symbol | Filed By Symbol | Shares Owned % Owned | Shares Vs. Prev Report | Filing |
| 2024-11-08 2:17 pm Unchanged | 13G | COGENT COMMUNICATIONS HOLDINGS INC. CCOI | BlackRock Inc. BLK | 6,874,787 14.000% | 0 (Unchanged) | View |
| 2024-10-23 5:04 pm Sale | 13G | COGENT COMMUNICATIONS HOLDINGS INC. CCOI | BlackRock Inc. BLK | 6,874,787 14.000% | -461,254 (-6.29%) | View |
| 2024-02-13 5:02 pm Sale | 13G | COGENT COMMUNICATIONS HOLDINGS INC. CCOI | VANGUARD GROUP INC | 5,081,633 10.450% | -144,398 (-2.76%) | View |
| 2024-01-26 2:30 pm Sale | 13G | COGENT COMMUNICATIONS HOLDINGS INC. CCOI | VAUGHAN NELSON INVESTMENT MANAGEMENT L.P. | 0 0.000% | -2,565,270 (Position Closed) | View |
| 2024-01-22 3:52 pm Sale | 13G | COGENT COMMUNICATIONS HOLDINGS INC. CCOI | BlackRock Inc. BLK | 7,336,041 15.100% | -137,887 (-1.84%) | View |
| 2023-02-09 11:15 am Purchase | 13G | COGENT COMMUNICATIONS HOLDINGS INC. CCOI | VANGUARD GROUP INC | 5,226,031 10.890% | 390,869 (+8.08%) | View |
| 2023-02-03 5:19 pm Purchase | 13G | COGENT COMMUNICATIONS HOLDINGS INC. CCOI | VAUGHAN NELSON INVESTMENT MANAGEMENT L.P. | 2,565,270 5.340% | 2,565,270 (New Position) | View |
| 2023-01-30 09:45 am Purchase | 13G | COGENT COMMUNICATIONS HOLDINGS INC. CCOI | BlackRock Inc. BLK | 7,473,928 15.600% | 401,873 (+5.68%) | View |
| 2022-02-10 5:50 pm Sale | 13G | COGENT COMMUNICATIONS HOLDINGS INC. CCOI | RENAISSANCE TECHNOLOGIES LLC | 2,178,356 4.570% | -518,800 (-19.24%) | View |
| 2022-02-09 3:43 pm Purchase | 13G | COGENT COMMUNICATIONS HOLDINGS INC. CCOI | VANGUARD GROUP INC | 4,835,162 10.140% | 70,225 (+1.47%) | View |
| 2022-01-26 8:14 pm Unchanged | 13G | COGENT COMMUNICATIONS HOLDINGS INC. CCOI | BlackRock Inc. BLK | 7,072,055 14.800% | 0 (Unchanged) | View |
| 2022-01-25 11:28 am Purchase | 13G | COGENT COMMUNICATIONS HOLDINGS INC. CCOI | BlackRock Inc. BLK | 7,072,055 14.800% | 585,470 (+9.03%) | View |
| 2021-05-10 11:14 am Purchase | 13G | COGENT COMMUNICATIONS HOLDINGS INC. CCOI | VANGUARD GROUP INC | 4,764,937 10.020% | 134,447 (+2.90%) | View |
| 2021-02-11 10:19 am Sale | 13G | COGENT COMMUNICATIONS HOLDINGS INC. CCOI | RENAISSANCE TECHNOLOGIES LLC | 2,697,156 5.710% | -891,210 (-24.84%) | View |
| 2021-02-10 10:46 am Sale | 13G | COGENT COMMUNICATIONS HOLDINGS INC. CCOI | VANGUARD GROUP INC | 4,630,490 9.800% | -80,040 (-1.70%) | View |
| 2021-01-26 2:22 pm Sale | 13G | COGENT COMMUNICATIONS HOLDINGS INC. CCOI | BlackRock Inc. BLK | 6,486,585 13.700% | -398,010 (-5.78%) | View |
| 2020-02-13 11:29 am Purchase | 13G | COGENT COMMUNICATIONS HOLDINGS INC. CCOI | RENAISSANCE TECHNOLOGIES LLC | 3,588,366 7.660% | 174,766 (+5.12%) | View |
| 2020-02-11 7:29 pm Sale | 13G | COGENT COMMUNICATIONS HOLDINGS INC. CCOI | VANGUARD GROUP INC | 4,710,530 10.050% | -66,599 (-1.39%) | View |
| 2020-02-04 11:53 am Purchase | 13G | COGENT COMMUNICATIONS HOLDINGS INC. CCOI | BlackRock Inc. BLK | 6,884,595 14.700% | 19,200 (+0.28%) | View |