Security	Date	Code	Shares	Price	A/D	Owned after	D/I
Common Stock^F1,F2,F3	Jul 8, 2015	C	3,949,364	—	A	3,949,364	D
Common Stock^F2,F3	Jul 8, 2015	X	24,252	$0.0163	A	3,973,616	D
Common Stock^F2,F3	Jul 8, 2015	J	22	$18.00	D	3,973,594	D

Table II — derivative securities

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	D/I
Series A-1 Preferred Stock^F2,F3,F1	—	Jul 8, 2015	C	475,988	D	—	—	Common Stock	475,988	D
Series B Preferred Stock^F2,F3,F1	—	Jul 8, 2015	C	105,774	D	—	—	Common Stock	105,774	D
Series C Preferred Stock^F2,F3,F1	—	Jul 8, 2015	C	571,367	D	—	—	Common Stock	571,367	D
Series D Preferred Stock^F2,F3,F1	—	Jul 8, 2015	C	2,463,916	D	—	—	Common Stock	2,463,916	D
Series E Preferred Stock^F2,F3,F1	—	Jul 8, 2015	C	332,319	D	—	—	Common Stock	332,319	D
Common Stock Warrant (right to buy)^F2,F3,F4	$0.0163	Jul 8, 2015	X	24,252	D	Nov 20, 2014	Nov 19, 2021	Common Stock	24,252	D

Explanation of responses

F1Each share of preferred stock automatically converted into one (1) share of Common Stock immediately prior to the closing of the Issuer's initial public offering ("IPO") of Common Stock, and has no expiration date.
F2Shares held directly by Lightspeed Venture Partners VIII, L.P. Lightspeed Ultimate General Partner VIII, Ltd. is the general partner of Lightspeed General Partner VIII, L.P., which is the general partner of Lightspeed Venture Partners VIII, L.P. As such, Lightspeed Ultimate General Partner VIII, Ltd. possesses the power to direct the voting and disposition of the shares owned by Lightspeed Venture Partners VIII, L.P. and may be deemed to have indirect beneficial ownership of the shares held by Lightspeed Venture Partners VIII, L.P. Christopher J. Schaepe, Barry Eggers, Ravi Mhatre and Peter Nieh are the directors of Lightspeed Ultimate General Partner VIII, Ltd. and therefore may be deemed to share power to direct the voting and disposition of the shares owned by Lightspeed Venture Partners VIII, L.P. and may be deemed to have indirect beneficial ownership of the shares held by Lightspeed Venture Partners VIII, L.P.
F3Each of the reporting persons disclaims beneficial ownership of these securities except to the extent of his or its respective pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 or for any other purposes.
F4This warrant was net exercised at the time of the IPO based on the IPO price.