| 01 Oct 2019 | GRANT_AWARD | COGENT COMMUNICATIONS HOLDINGS, INC. | 1,750 | 0.00 USD | |
| 21 Aug 2019 | SALE | COGENT COMMUNICATIONS HOLDINGS, INC. | 5,000 | 59.90 USD | |
| 01 Jul 2019 | GRANT_AWARD | COGENT COMMUNICATIONS HOLDINGS, INC. | 1,750 | 0.00 USD | |
| 22 May 2019 | GIFT | COGENT COMMUNICATIONS HOLDINGS, INC. | 5,000 | 0.00 USD | |
| 01 Apr 2019 | GRANT_AWARD | COGENT COMMUNICATIONS HOLDINGS, INC. | 1,750 | 0.00 USD | |
| 12 Mar 2019 | GIFT | COGENT COMMUNICATIONS HOLDINGS, INC. | 1,200 | 0.00 USD | |
| 01 Jan 2019 | GRANT_AWARD | COGENT COMMUNICATIONS HOLDINGS, INC. | 1,750 | 0.00 USD | |
| 01 Oct 2018 | GRANT_AWARD | COGENT COMMUNICATIONS HOLDINGS, INC. | 1,750 | 0.00 USD | |
| 01 Jul 2018 | GRANT_AWARD | COGENT COMMUNICATIONS HOLDINGS, INC. | 1,750 | 0.00 USD | |
| 20 Jun 2018 | GIFT | COGENT COMMUNICATIONS HOLDINGS, INC. | 5,000 | 0.00 USD | |
| 01 Apr 2018 | GRANT_AWARD | COGENT COMMUNICATIONS HOLDINGS, INC. | 1,750 | 0.00 USD | |
| 26 Feb 2018 | GIFT | COGENT COMMUNICATIONS HOLDINGS, INC. | 1,000 | 0.00 USD | |
| 01 Jan 2018 | GRANT_AWARD | COGENT COMMUNICATIONS HOLDINGS, INC. | 1,750 | 0.00 USD | |
| 05 Dec 2017 | PURCHASE | COGENT COMMUNICATIONS HOLDINGS, INC. | 700 | 45.30 USD | first after silence |
| 07 Nov 2017 | GIFT | COGENT COMMUNICATIONS HOLDINGS, INC. | 1,000 | 0.00 USD | |
| 01 Oct 2017 | GRANT_AWARD | COGENT COMMUNICATIONS HOLDINGS, INC. | 1,750 | 0.00 USD | |
| 31 Aug 2017 | GIFT | COGENT COMMUNICATIONS HOLDINGS, INC. | 3,000 | 0.00 USD | |
| 01 Jul 2017 | GRANT_AWARD | COGENT COMMUNICATIONS HOLDINGS, INC. | 1,750 | 0.00 USD | |
| 03 May 2017 | GRANT_AWARD | COGENT COMMUNICATIONS HOLDINGS, INC. | 1,750 | 0.00 USD | |
| 27 Feb 2017 | SALE | COGENT COMMUNICATIONS HOLDINGS, INC. | 5,000 | 42.38 USD | |
| 01 Jan 2017 | GRANT_AWARD | COGENT COMMUNICATIONS HOLDINGS, INC. | 1,750 | 0.00 USD | |
| 01 Oct 2016 | GRANT_AWARD | COGENT COMMUNICATIONS HOLDINGS, INC. | 1,875 | 0.00 USD | |
| 23 Aug 2016 | GIFT | COGENT COMMUNICATIONS HOLDINGS, INC. | 2,000 | 0.00 USD | |
| 01 Jul 2016 | GRANT_AWARD | COGENT COMMUNICATIONS HOLDINGS, INC. | 1,875 | 0.00 USD | |
| 18 May 2016 | GIFT | COGENT COMMUNICATIONS HOLDINGS, INC. | 2,000 | 0.00 USD | |