Exhibit 99A

Agreement of Reporting Persons

Each of the undersigned hereby agrees that the statement on Schedule 13D filed on the date hereof with respect to the shares of Common Stock of Cogent Communications Group, Inc. has been filed on behalf of the undersigned.

Signature

	Dated: August 11, 2003
Broadview Capital Partners L.P.
	By:	Broadview Capital Partners Management LLC
	Its:	General Partner
	By:	/s/ David J. Kapnick
		David J. Kapnick
		Chief Financial Officer
Broadview Capital Partners Qualified Purchaser Fund L.P.
	By:	Broadview Capital Partners Management LLC
	Its:	General Partner
	By:	/s/ David J. Kapnick
		David J. Kapnick
		Chief Financial Officer
Broadview Capital Partners Affiliates Fund LLC
	By:	Broadview Capital LLC
	Its:	Manager
	By:	/s/ David J. Kapnick
		David J. Kapnick
		Chief Financial Officer
Broadview BCPSBS Fund L.P.
	By:	Broadview BCPSBS Fund LLC
	Its:	Manager
	By:	/s/ David J. Kapnick
		David J. Kapnick
		Attorney-in-Fact

Broadview Capital Partners Management LLC
	By:	/s/ David J. Kapnick
		David J. Kapnick
		Chief Financial Officer
BCI Holdings, L.P.
	By:	Broadview Holdings LLP
	Its:	General Partner
	By:	/s/ David J. Kapnick
		David J. Kapnick
		Attorney-in-Fact
Broadview Holdings LLP
	By:	/s/ David J. Kapnick
		David J. Kapnick
		Attorney-in-Fact
Individuals:
Steven D. Brooks
Stephen J. Bachmann
Paul F. Deninger
			By:	/s/ David J. Kapnick
					David J. Kapnick,
					Attorney-in-Fact for the
					above-listed individuals

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