Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Class B Common Stock^F1,F3	—	Jul 7, 2015	C	4,498,408	D	—	—	Class A Common Stock	4,498,408	0	I
Class B Common Stock^F2,F3	—	Jul 7, 2015	C	111,089	D	—	—	Class A Common Stock	111,089	0	I

Explanation of responses

F1The reported securities are held of record by Meritech Capital Partners IV L.P. ("MCP IV"). Meritech Capital Associates IV L.L.C., the general partner of MCP IV, has sole voting and dispositive power with respect to the securities held by MCP IV. Paul S. Madera, Michael B. Gordon, Robert D. Ward, George H. Bischof and Craig Sherman, the managing members of Meritech Capital Associates IV L.L.C., share voting and dispositive power with respect to the shares held by MCP IV. Such persons and entities disclaim beneficial ownership of the securities held by MCP IV except to the extent of any pecuniary interest therein.
F2The reported securities are held of record by Meritech Capital Affiliates IV L.P. ("MCA IV"). Meritech Capital Associates IV L.L.C., the general partner of MCA IV, has sole voting and dispositive power with respect to the securities held by MCA IV. Paul S. Madera, Michael B. Gordon, Robert D. Ward, George H. Bischof and Craig Sherman, the managing members of Meritech Capital Associates IV L.L.C., share voting and dispositive power with respect to the shares held by MCA IV. Such persons and entities disclaim beneficial ownership of the securities held by MCA IV except to the extent of any pecuniary interest therein.
F3Each share of Class B Common Stock is convertible into one share of Class A Common Stock at the option of the holder and has no expiration date.