| 01 May 2019 | GRANT_AWARD | COGENT COMMUNICATIONS HOLDINGS, INC. | 5,000 | 0.00 USD | |
| 01 Mar 2019 | SALE | COGENT COMMUNICATIONS HOLDINGS, INC. | 2,400 | 49.00 USD | |
| 03 Dec 2018 | SALE | COGENT COMMUNICATIONS HOLDINGS, INC. | 3,000 | 49.16 USD | |
| 13 Sept 2018 | SALE | COGENT COMMUNICATIONS HOLDINGS, INC. | 4,000 | 54.92 USD | |
| 12 Sept 2018 | SALE | COGENT COMMUNICATIONS HOLDINGS, INC. | 2,000 | 54.96 USD | |
| 04 Sept 2018 | SALE | COGENT COMMUNICATIONS HOLDINGS, INC. | 3,000 | 53.95 USD | |
| 01 Jun 2018 | SALE | COGENT COMMUNICATIONS HOLDINGS, INC. | 3,000 | 51.14 USD | |
| 01 Mar 2018 | SALE | COGENT COMMUNICATIONS HOLDINGS, INC. | 3,000 | 43.17 USD | |
| 21 Feb 2018 | GRANT_AWARD | COGENT COMMUNICATIONS HOLDINGS, INC. | 9,600 | 0.00 USD | |
| 01 Dec 2017 | SALE | COGENT COMMUNICATIONS HOLDINGS, INC. | 3,000 | 46.51 USD | |
| 01 Sept 2017 | SALE | COGENT COMMUNICATIONS HOLDINGS, INC. | 3,000 | 46.75 USD | |
| 01 Jun 2017 | SALE | COGENT COMMUNICATIONS HOLDINGS, INC. | 3,000 | 40.20 USD | |
| 03 May 2017 | GRANT_AWARD | COGENT COMMUNICATIONS HOLDINGS, INC. | 9,600 | 0.00 USD | |
| 01 Mar 2017 | SALE | COGENT COMMUNICATIONS HOLDINGS, INC. | 3,000 | 42.00 USD | |
| 01 Dec 2016 | SALE | COGENT COMMUNICATIONS HOLDINGS, INC. | 1,000 | 36.99 USD | |
| 01 Nov 2016 | SALE | COGENT COMMUNICATIONS HOLDINGS, INC. | 1,000 | 36.40 USD | |
| 03 Oct 2016 | SALE | COGENT COMMUNICATIONS HOLDINGS, INC. | 1,000 | 36.24 USD | |
| 01 Sept 2016 | SALE | COGENT COMMUNICATIONS HOLDINGS, INC. | 1,000 | 35.40 USD | |
| 01 Aug 2016 | SALE | COGENT COMMUNICATIONS HOLDINGS, INC. | 1,000 | 43.27 USD | |
| 01 Jul 2016 | SALE | COGENT COMMUNICATIONS HOLDINGS, INC. | 1,000 | 40.09 USD | |
| 01 Jun 2016 | SALE | COGENT COMMUNICATIONS HOLDINGS, INC. | 1,000 | 39.69 USD | |
| 04 May 2016 | GRANT_AWARD | COGENT COMMUNICATIONS HOLDINGS, INC. | 12,000 | 0.00 USD | |
| 02 May 2016 | SALE | COGENT COMMUNICATIONS HOLDINGS, INC. | 1,000 | 38.95 USD | |
| 01 Apr 2016 | SALE | COGENT COMMUNICATIONS HOLDINGS, INC. | 1,000 | 39.00 USD | |
| 01 Dec 2015 | SALE | COGENT COMMUNICATIONS HOLDINGS, INC. | 1,000 | 33.96 USD | |