Exhibit 99.(a)

EXHIBIT A

Agreement of Reporting Persons

Each of the undersigned hereby agrees that Amendment No. 4 to Schedule 13G filed on the date hereof with respect to the shares of Common Stock of aQuantive, Inc. has been filed on behalf of the undersigned.

Signature:

Dated: February 9, 2004
Entities:
Oak Investment Partners VIII, Limited Partnership
Oak Associates VIII, LLC
Oak VIII Affiliates Fund, Limited Partnership
Oak VIII Affiliates, LLC
Oak Management Corporation
	By:	/s/ Edward F. Glassmeyer
	Edward F. Glassmeyer, as
	General Partner or
	Managing Member or as
	Attorney-in-fact for the
	above-listed entities
Individuals:
Bandel L. Carano
Gerald R. Gallagher
Edward F. Glassmeyer
Fredric W. Harman
Ann H. Lamont
	By:	/s/ Edward F. Glassmeyer
	Edward F. Glassmeyer,
	Individually and as
	Attorney-in-fact for the
	above-listed individuals