Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Existing Class A Common Stock^F1,F2,F3,F4	Jan 28, 2015	C	6,711,857	—	A	6,711,857	I	See footnote
Existing Class A Common Stock^F5,F4	Jan 28, 2015	J	6,711,857	—	D	0	I	See footnote

Table II — derivative securities

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Series C Preferred Stock^F4,F1	—	Jan 28, 2015	C	6,170,618	D	—	—	Existing Class A Common Stock	6,170,618	0	I
Series D Preferred Stock^F4,F2	—	Jan 28, 2015	C	503,056	D	—	—	Existing Class A Common Stock	503,056	0	I
Series E Preferred Stock^F4,F3	—	Jan 28, 2015	C	38,183	D	—	—	Existing Class A Common Stock	38,183	0	I
Class B Common Stock^F4,F6	—	Jan 28, 2015	J	6,711,857	A	—	—	Class A Common Stock	6,711,857	6,711,857	I

Explanation of responses

F1The Series C Preferred Stock automatically converted into the Issuer's existing Class A Common Stock ("Existing Class A 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 D Preferred Stock automatically converted into the Issuer's Existing Class A 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 Series E Preferred Stock automatically converted into the Issuer's Existing Class A Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering and had no expiration date.
F4The shares are held of record by Scale Venture Partners III, L.P. ("SVP III"). Scale Venture Management III, LLC ("SVM III"), the general partner of SVP III, has sole voting and dispositive power with respect to the shares held by SVP III. Stacey Bishop, Kate Mitchell, Rory O'Driscoll and Andy Vitus, the managing members of SVM III, share voting and dispositive power with respect to the shares help by SVP III. The reporting persons disclaim beneficial ownership of the reported securities for purposes of Section 16 or for any other purpose.
F5Immediately 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 Existing Class A Common Stock, each share of Existing Class A Common Stock was reclassified into one share of Class B Common Stock in an exempt transaction pursuant to Rule 16b-7.
F6Each 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.