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 * WEI JAMES   2. Issuer Name and Ticker or Trading Symbol COGENT COMMUNICATIONS GROUP INC [COI] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O WORLDVIEW TECHNOLOGY PARTNERS, 435 TASSO ST., SUITE 120 3. Date of Earliest Transaction (Month/Day/Year) 02/15/2005 (Street) PALO ALTO, CA 94301 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 02/15/2005   C   18,796,524 A (8) 19,345,055 D (2)   Common Stock 02/15/2005   C   3,059,505 A (8) 3,148,620 D (3)   Common Stock 02/15/2005   C   155,458 A (8) 159,506 D (4)

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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
Series G Participating Convertible Preferred Stock	(1)	02/15/2005		C			1,887	(1)	(1)	Common Stock	10,866,869	(1)	0	D (2)
Series G Participating Convertible Preferred Stock	(1)	02/15/2005		C			306	(1)	(1)	Common Stock	1,762,195	(1)	0	D (3)
Series G Participating Convertible Preferred Stock	(1)	02/15/2005		C			14	(1)	(1)	Common Stock	80,623	(1)	0	D (4)
Series I Participating Convertible Preferred Stock	(5)	02/15/2005		C			212.94	(5)	(5)	Common Stock	1,320,149	(5)	0	D (2)
Series I Participating Convertible Preferred Stock	(5)	02/15/2005		C			35.1	(5)	(5)	Common Stock	217,607	(5)	0	D (3)
Series I Participating Convertible Preferred Stock	(5)	02/15/2005		C			2.34	(5)	(5)	Common Stock	14,507	(5)	0	D (4)
Series J Participating Convertible Preferred Stock	(6)	02/15/2005		C			128	(6)	(6)	Common Stock	3,974,664	(6)	0	D (2)
Series J Participating Convertible Preferred Stock	(6)	02/15/2005		C			21	(6)	(6)	Common Stock	645,729	(6)	0	D (3)
Series J Participating Convertible Preferred Stock	(6)	02/15/2005		C			1	(6)	(6)	Common Stock	29,330	(6)	0	D (4)
Series M Participating Convertible Preferred Stock	(7)	02/15/2005		C			85	(7)	(7)	Common Stock	2,634,842	(7)	0	D (2)
Series M Participating Convertible Preferred Stock	(7)	02/15/2005		C			14	(7)	(7)	Common Stock	433,974	(7)	0	D (3)
Series M Participating Convertible Preferred Stock	(7)	02/15/2005		C			1	(7)	(7)	Common Stock	30,998	(7)	0	D (4)

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
WEI JAMES C/O WORLDVIEW TECHNOLOGY PARTNERS 435 TASSO ST., SUITE 120 PALO ALTO, CA 94301		X
WEINGARTEN TIM 435 TASSO STREET SUITE 120 PALO ALTO, CA 94301				Director and 10% Owner
WORLDVIEW TECHNOLOGY PARTNERS IV LP 435 TASSO ST., STE. 120 PALO ALTO, CA 94301		X

Signatures

James Wei		02/15/2005
**Signature of Reporting Person		Date
Tim Weingarten		02/15/2005
**Signature of Reporting Person		Date
Worldview Technology Partners IV, L.P., by Worldview Capital IV, L.P., its general partner, by Worldview Equity I, L.L.C., by James Wei, a Managing Member		02/15/2005
**Signature of Reporting Person		Date
Worldview Technology International IV, L.P., by Worldview Capital IV, L.P., its general partner, by Worldview Equity I, L.L.C., by James Wei, a Managing Member		02/15/2005
**Signature of Reporting Person		Date
Worldview Strategic Partners IV, L.P., by Worldview Capital IV, L.P., its general partner, by Worldview Equity I, L.L.C., by James Wei, a Managing Member		02/15/2005
**Signature of Reporting Person		Date
Worldview Equity I, L.L.C., by James Wei, a Managing Member		02/15/2005
**Signature of Reporting Person		Date
Worldview Capital IV, L.P., by Worldview Equity I, L.L.C., by James Wei, a Managing Member		02/15/2005
**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)	Series G Convertible Preferred Stock converted into the number of shares of Common Stock indicated in column 7.
(2)	Shares are directly owned by Worldview Technology Partners IV, L.P. James Wei, the Designated Filer, is a managing member of Worldview Equity I, L.L.C., and Tim Weingarten, a director of the issuer, has certain voting rights in Worldview Equity I, L.L.C., which is the general partner of Worldview Capital IV, L.P.(the general partner of Worldview Technology Partners IV, L.P.). Wei and Weingarten may be deemed to be indirect beneficial owners of the reported shares but each disclaims beneficial ownership in the shares held by the joint filers, except to the extent of any pecuniary interest therein
(3)	Shares are directly owned by Worldview Technology International IV, L.P. James Wei, the Designated Filer, is a managing member of Worldview Equity I, L.L.C., and Tim Weingarten, a director of the issuer, has certain voting rights in Worldview Equity I, L.L.C., which is the general partner of Worldview Capital IV, L.P.(the general partner of Worldview Technology International IV, L.P.). Wei and Weingarten may be deemed to be indirect beneficial owners of the reported shares but each disclaims beneficial ownership in the shares held by the joint filers, except to the extent of any pecuniary interest therein.
(4)	Shares are directly owned by Worldview Strategic Partners IV, L.P. James Wei, the Designated Filer, is a managing member of Worldview Equity I, L.L.C., and Tim Weingarten, a director of the issuer, has certain voting rights in Worldview Equity I, L.L.C., which is the general partner of Worldview Capital IV, L.P.(the general partner of Worldview Strategic Partners IV, L.P.). Wei and Weingarten may be deemed to be indirect beneficial owners of the reported shares but each disclaims beneficial ownership in the shares held by the joint filers, except to the extent of any pecuniary interest therein.
(5)	Series I Convertible Preferred Stock converted into the number of shares of Common Stock indicated in column 7.
(6)	Series J Convertible Preferred Stock converted into the number of shares of Common Stock indicated in column 7.
(7)	Series M Convertible Preferred Stock converted into the number of shares of Common Stock indicated in column 7.
(8)	Converted into Common Stock pursuant to the Conversion and Lock-Up Letter Agreement.
Remarks: James Wei, the Designated Filer, is a Managing Member of Worldview Equity I, L.L.C., which is the general partner of Worldview Capital IV, L.P.  Tim Weingarten is a director of the Issuer and has certain voting rights in Worldview Equity I, L.L.C. Worldview Capital IV, L.P. is the general partner of Worldview Technology Partners IV, L.P., Worldview Technology International IV, L.P. and Worldview Strategic Partners IV, L.P. Each Reporting Person disclaims the existence of a "group" and disclaims beneficial ownership of any securities (except to the extent of such Reporting Person's pecuniary interest in such securities) other than any securities reported herein as being directly owned by such reporting person, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of any securities for purposes of Section 16 or for any other purpose.

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