COGENT COMMUNICATIONS GROUP INC

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G)

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Regulation FD Disclosure

Entry into a Material Definitive Agreement

Entry into a Material Definitive Agreement

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Annual Report Scanned (Paper)

Definitive Proxy Statement

Annual report pursuant to Section 13 or 15(d)

Results of Operations and Financial Condition

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Results of Operations and Financial Condition

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Entry into a Material Definitive Agreement

Regulation FD Disclosure

Regulation FD Disclosure

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Entry into a Material Definitive Agreement

Regulation FD Disclosure

Annual Report Scanned (Paper)

Definitive Proxy Statement

Preliminary Proxy Statement

Entry into a Material Definitive Agreement

Annual report pursuant to Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Annual Report Scanned (Paper)

Definitive Proxy Statement

Annual report pursuant to Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

General form for quarterly reports under Section 13 or 15(d)

Annual Report Scanned (Paper)

Definitive Proxy Statement

Annual report pursuant to Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Definitive Proxy Statement

Preliminary Proxy Statement

Annual report pursuant to Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Definitive Proxy Statement

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Definitive Proxy Statement

Preliminary Proxy Statement

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Definitive Proxy Statement

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Definitive Proxy Statement

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

No description available

Additional Information for Proxy Statement/ Votes

Letter from the SEC

Letter from the SEC

Correspondence with the SEC

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Entry into a Material Definitive Agreement

Letter from the SEC

Correspondence with the SEC

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Automatic Shelf Registration

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Automatic Shelf Registration

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Free Writing Prospectus

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Registration statement under Securities Act of 1933 (amendment)

Howell Deneen C

Montagner Marc

Howard Eve N

Kennedy Sheryl Lynn

BROOKS STEVEN D

de Sa Paul

FERGUSON Lewis H

KILMER HENRY W

WEED THADDEUS GERARD

WEED THADDEUS GERARD

BROOKS STEVEN D

Howard Eve N

Howell Deneen C

de Sa Paul

Montagner Marc

Kennedy Sheryl Lynn

FERGUSON Lewis H