Michael Arrington is the founder and partner of Arrington XRP Capital. He is an advisor at Signum Capital. He is a co-founder of Achex. He is a co-founder of TechCrunch50. He is also a member of Flindel's advisory board. He is a co-founder and general partner of CrunchFund. He is a serial entrepreneur and founder of TechCrunch. He has served as a limited partner at Benchmark Capital. He is also the co-author of a book on initial public offerings. He left WSGR in 1999 to join RealNames as Vice President of Business Development and General Counsel. He received a B.A. in economics from Claremont McKenna College and a J.D. from Stanford Law School.