Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
BERTRAND JEAN JACQUES
  2. Issuer Name and Ticker or Trading Symbol
COGENT COMMUNICATIONS GROUP INC [CCOI]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
C/O BNP PARIBAS PRIVATE EQUITY SAS, 32 BOULEVARD HAUSSMANN
3. Date of Earliest Transaction (Month/Day/Year)
06/07/2006
(Street)

PARIS, I0 75009
4. If Amendment, Date Original Filed(Month/Day/Year)
6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)
7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock, Par value $0.001 per share 06/07/2006   S   404,204 D $ 8.5275 3,641,052 (1) I See footnotes (2) (3)
Common Stock, Par value $0.001 per share 06/07/2006   S   23,230 D $ 8.5275 209,255 (1) I See footnotes (2) (4)
Common Stock, Par value $0.001 per share 06/07/2006   S   340 D $ 8.5275 3,410 (1) D (2) (5)  

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)
6. Date Exercisable and Expiration Date
(Month/Day/Year)
7. Title and Amount of Underlying Securities
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)
10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)
11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
BERTRAND JEAN JACQUES
C/O BNP PARIBAS PRIVATE EQUITY SAS
32 BOULEVARD HAUSSMANN
PARIS, I0 75009
  X      
BNP EUROPE TE LECOM & MEDIA FUND II LP
CIBC FINANCIAL CENTRE
3RD FLOOR, PO BOX 694 GT, II DR ROYS DR
GRAND CAYMAN ISLANDS, E9 00000
      See footnote (2)
General Business Finance & Investments, Ltd.
C/O MAPLES AND CALDER UGLAND HOUSE,
SOUTH CHURCH STREET P.O. BOX 309
GRAND CAYMAN, E9 00000
      See footnote (2)

Signatures

 /s/ Jean-Jacques Bertrand   06/09/2006
**Signature of Reporting Person Date

 /s/ Richard Hastings   06/09/2006
**Signature of Reporting Person Date

 /s/ Jennifer Fischetti   06/09/2006
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) See attached Exhibit 99.
(2) See attached Exhibit 99.
(3) See attached Exhibit 99.
(4) See attached Exhibit 99.
(5) See attached Exhibit 99.
 
Remarks:
Authorized Signatory

General Business Finance and Investments Ltd. and BNP Europe Telecom & Media Fund II, LP, by General Business Finance and
 Investments Ltd., its General Partner by Commerce Advisory Limited, its Partnership Secretary

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