Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock^{F1,F4,F5,F6,F7,F8,F2}	Apr 12, 2017	C	6,197,759	—	A	6,197,759	I	See Footnote
Common Stock^{F1,F4,F5,F6,F7,F8,F3}	Apr 12, 2017	C	396,235	—	A	396,235	I	See Footnote
Common Stock^F1,F2	Apr 12, 2017	J	6,197,759	—	D	0	I	See Footnote
Common Stock^F1,F3	Apr 12, 2017	J	396,235	—	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 B Preferred Stock^F2,F4	—	Apr 12, 2017	C	4,199,074	D	—	—	Common Stock	4,199,074	0	I
Series B Preferred Stock^F3,F4	—	Apr 12, 2017	C	268,455	D	—	—	Common Stock	268,455	0	I
Series C Preferred Stock^F2,F5	—	Apr 12, 2017	C	771,039	D	—	—	Common Stock	771,039	0	I
Series C Preferred Stock^F3,F5	—	Apr 12, 2017	C	49,294	D	—	—	Common Stock	49,294	0	I
Series D Preferred Stock^F2,F6	—	Apr 12, 2017	C	636,220	D	—	—	Common Stock	636,220	0	I
Series D Preferred Stock^F3,F6	—	Apr 12, 2017	C	40,675	D	—	—	Common Stock	40,675	0	I
Series E Preferred Stock^F2,F7	—	Apr 12, 2017	C	552,313	D	—	—	Common Stock	552,313	0	I
Series E Preferred Stock^F3,F7	—	Apr 12, 2017	C	35,310	D	—	—	Common Stock	35,310	0	I
Series F Preferred Stock^F2,F8	—	Apr 12, 2017	C	39,113	D	—	—	Common Stock	39,113	0	I
Series F Preferred Stock^F3,F8	—	Apr 12, 2017	C	2,501	D	—	—	Common Stock	2,501	0	I
Class B Common Stock^F2,F1,F9	—	Apr 12, 2017	J	6,197,759	A	—	—	Class A Common Stock	6,197,759	6,197,759	I
Class B Common Stock^F3,F1,F9	—	Apr 12, 2017	J	396,235	A	—	—	Class A Common Stock	396,235	396,235	I

Explanation of responses

F1Immediately 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.
F2Consists of securities held of record by Khosla Ventures IV, L.P. ("KV IV"), of which Khosla Ventures Associates IV, LLC ("KVA IV") is the general partner. Vinod Khosla is the managing member of VK Services, LLC ("VK Services"), which is the manager of KVA IV. Each of KVA IV, VK Services and Vinod Khosla may be deemed to possess voting and investment control over such securities held by KV IV, and each of KVA IV, VK Services and Vinod Khosla may be deemed to have indirect beneficial ownership of such securities held by KV IV. Each Reporting Person disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein.
F3Consists of securities held of record by Khosla Ventures IV (CF), L.P. ("KV IV (CF)"), of which KVA IV is the general partner. Vinod Khosla is the managing member of VK Services, which is the manager of KVA IV. Each of KVA IV, VK Services and Vinod Khosla may be deemed to possess voting and investment control over such securities held by KV IV (CF), and each of KVA IV, VK Services and Vinod Khosla may be deemed to have indirect beneficial ownership of such securities held by KV IV (CF). Each Reporting Person disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein.
F4The Series B Preferred Stock automatically converted into Common Stock on a 1:1 basis and has no expiration date.
F5The Series C Preferred Stock automatically converted into Common Stock on a 1:1 basis and has no expiration date.
F6The Series D Preferred Stock automatically converted into Common Stock on a 1:1 basis and has no expiration date.
F7The Series E Preferred Stock automatically converted into Common Stock on a 1:1 basis and has no expiration date.
F8The Series F Preferred Stock automatically converted into Common Stock on a 1:1 basis and has no expiration date.
F9Each 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.