Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Series F Preferred Stock^F1,F3	—	Jun 24, 2015	C	1,762,015	D	—	—	Common Stock	1,762,015	0	I
Series G Preferred Stock^F2,F3	—	Jun 24, 2015	C	368,950	D	—	—	Common Stock	368,950	0	I
Class B Common Stock^F4,F5,F3	—	Jun 24, 2015	J	3,205,365	A	—	—	Class A Common Stock	3,205,365	3,205,365	I

Explanation of responses

F1The Series F Preferred Stock automatically converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering and had no expiration date.
F2The Series G Preferred Stock automatically converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering and had no expiration date.
F3The shares are held of record by Institutional Venture Partners XIII, L.P. ("IVP XIII"). Institutional Venture Management XIII LLC ("IVM XIII") is the general partner of IVP XIII. Todd C. Chaffee, Norman A. Fogelsong, Stephen J. Harrick, J. Sanford Miller and Dennis B. Phelps, as the managing directors of IVM XIII, share voting and dispositive power with respect to the shares held by IVP XIII. Each of these reporting individuals disclaims beneficial ownership of the securities reported herein, except to the extent of his respective pecuniary interest therein.
F4Immediately prior to the closing of the Issuer's initial public offering and following the conversion of each series of the Issuer's convertible preferred stock into Common Stock, each share of Common Stock was reclassified into one share of Class B Common Stock in an exempt transaction pursuant to Rule 16b-7.
F5Each 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.