| SC 13G/A | 2007-02-14 | OAK MANAGEMENT CORP | COGENT COMMUNICATIONS GROUP INC | 0 | 0.0% | EDGAR |
| SC 13G | 2007-02-01 | ZIFF ASSET MANAGEMENT LP | COGENT COMMUNICATIONS GROUP INC | 2,871,212 | 5.9% | EDGAR |
| SC 13G | 2006-12-11 | FMR CORP | COGENT COMMUNICATIONS GROUP INC | 7,332,612 | 15.0% | EDGAR |
| SC 13D/A | 2006-11-29 | BNP EUROPE TE LECOM & MEDIA FUND II LP | COGENT COMMUNICATIONS GROUP INC | 2,850,860 | 5.8% | EDGAR |
| SC 13D/A | 2006-11-20 | JERUSALEM VENTURE PARTNERS IV LP | COGENT COMMUNICATIONS GROUP INC | 1,320,150 | 2.7% | EDGAR |
| SC 13D/A | 2006-11-20 | WORLDVIEW TECHNOLOGY PARTNERS IV LP | COGENT COMMUNICATIONS GROUP INC | 392,086 | 0.8% | EDGAR |
| SC 13D/A | 2006-09-19 | JERUSALEM VENTURE PARTNERS IV LP | COGENT COMMUNICATIONS GROUP INC | 2,179,779 | 4.5% | EDGAR |
| SC 13D/A | 2006-07-03 | WORLDVIEW TECHNOLOGY PARTNERS IV LP | COGENT COMMUNICATIONS GROUP INC | 783,291 | 1.6% | EDGAR |
| SC 13D/A | 2006-06-23 | JERUSALEM VENTURE PARTNERS IV LP | COGENT COMMUNICATIONS GROUP INC | 2,582,729 | 5.4% | EDGAR |
| SC 13G | 2006-06-23 | OAK MANAGEMENT CORP | COGENT COMMUNICATIONS GROUP INC | 3,711,469 | 7.7% | EDGAR |
| SC 13D/A | 2006-06-16 | BNP EUROPE TE LECOM & MEDIA FUND II LP | COGENT COMMUNICATIONS GROUP INC | 3,850,307 | 7.9% | EDGAR |
| SC 13G/A | 2006-05-10 | FMR CORP | COGENT COMMUNICATIONS GROUP INC | 0 | 0.0% | EDGAR |
| SC 13G/A | 2006-02-14 | Cisco Systems Capital CORP | COGENT COMMUNICATIONS GROUP INC | 1,712,293 | 3.9% | EDGAR |
| SC 13G | 2006-02-14 | FMR CORP | COGENT COMMUNICATIONS GROUP INC | 2,580,200 | 5.9% | EDGAR |
| SC 13D/A | 2005-06-27 | Cisco Systems Capital CORP | COGENT COMMUNICATIONS GROUP INC | 3,409,985 | 8.0% | EDGAR |
| SC 13G | 2005-06-27 | Cisco Systems Capital CORP | COGENT COMMUNICATIONS GROUP INC | 3,409,985 | 8.0% | EDGAR |
| SC 13D/A | 2005-04-14 | BNP EUROPE TE LECOM & MEDIA FUND II LP | COGENT COMMUNICATIONS GROUP INC | 427,774,334 | 12.7% | EDGAR |
| SC 13D/A | 2005-03-16 | BCP CAPITAL, L.P. | COGENT COMMUNICATIONS GROUP INC | 5,180,800 | 0.8% | EDGAR |
| SC 13D/A | 2005-02-23 | OAK MANAGEMENT CORP | COGENT COMMUNICATIONS GROUP INC | 91,627,271 | 14.1% | EDGAR |
| SC 13D | 2005-02-17 | Cisco Systems Capital CORP | COGENT COMMUNICATIONS GROUP INC | 68,199,713 | 10.5% | EDGAR |