Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock^F1,F2	Aug 2, 2017	C	6,109,256	—	A	6,135,371	I	By Draper Fisher Jurvetson Fund IX, L.P.
Common Stock^F3,F2	Aug 2, 2017	C	224,354	—	A	6,359,725	I	By Draper Fisher Jurvetson Fund IX, L.P.
Common Stock^F4,F2	Aug 2, 2017	C	214,025	—	A	6,573,750	I	By Draper Fisher Jurvetson Fund IX, L.P.
Common Stock^F5,F2	Aug 2, 2017	C	197,993	—	A	6,771,743	I	By Draper Fisher Jurvetson Fund IX, L.P.
Common Stock^F1,F6	Aug 2, 2017	C	165,553	—	A	166,260	I	By Draper Fisher Jurvetson Partners IX, LLC
Common Stock^F3,F6	Aug 2, 2017	C	6,079	—	A	172,339	I	By Draper Fisher Jurvetson Partners IX, LLC
Common Stock^F4,F6	Aug 2, 2017	C	5,799	—	A	178,138	I	By Draper Fisher Jurvetson Partners IX, LLC
Common Stock^F5,F6	Aug 2, 2017	C	5,365	—	A	183,503	I	By Draper Fisher Jurvetson Partners IX, LLC
Common Stock^F1,F7	Aug 2, 2017	C	217,492	—	A	217,492	I	By Draper Associates, L.P
Common Stock^F3,F7	Aug 2, 2017	C	7,987	—	A	225,479	I	By Draper Associates, L.P.
Common Stock^F4,F8	Aug 2, 2017	C	7,619	—	A	7,619	I	By Draper Associates Riskmasters Fund II, LLC
Common Stock^F5,F9	Aug 2, 2017	C	7,048	—	A	7,977	I	By Draper Associates Riskmasters Fund III, LLC

Table II — derivative securities

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	D/I
Series C Preferred Stock^F2,F1	—	Aug 2, 2017	C	6,109,256	D	—	—	Common Stock	6,109,256	I
Series D Preferred Stock^F2,F3	—	Aug 2, 2017	C	224,354	D	—	—	Common Stock	224,354	I
Series E Preferred Stock^F2,F4	—	Aug 2, 2017	C	214,025	D	—	—	Common Stock	214,025	I
Series F Preferred Stock^F2,F5	—	Aug 2, 2017	C	197,993	D	—	—	Common Stock	197,993	I
Series C Preferred Stock^F6,F1	—	Aug 2, 2017	C	165,553	D	—	—	Common Stock	165,553	I
Series D Preferred Stock^F6,F3	—	Aug 2, 2017	C	6,079	D	—	—	Common Stock	6,079	I
Series E Preferred Stock^F6,F4	—	Aug 2, 2017	C	5,799	D	—	—	Common Stock	5,799	I
Series F Preferred Stock^F6,F5	—	Aug 2, 2017	C	5,365	D	—	—	Common Stock	5,365	I
Series C Preferred Stock^F7,F1	—	Aug 2, 2017	C	217,492	D	—	—	Common Stock	217,492	I
Series D Preferred Stock^F7,F3	—	Aug 2, 2017	C	7,987	D	—	—	Common Stock	7,987	I
Series E Preferred Stock^F8,F4	—	Aug 2, 2017	C	7,619	D	—	—	Common Stock	7,619	I
Series F Preferred Stock^F9,F5	—	Aug 2, 2017	C	7,048	D	—	—	Common Stock	7,048	I

Explanation of responses

F1Each share of the issuer's Series C Preferred Stock automatically converted into 1 share of the issuer's Common Stock on August 2, 2017 in connection with the closing of the issuer's sale of its Common Stock in its firm commitment initial public offering (the "IPO") pursuant to a registration statement on Form S-1 (File No. 333-219093) under the Securities Act of 1933, as amended (the "Registration Statement"), and had no expiration date.
F2These securities are held of record by Draper Fisher Jurvetson Fund IX, L.P. ("Fund IX"). Draper Fisher Jurvetson Fund IX Partners, L.P. ("Fund IX Partners") is the general partner of Fund IX. Timothy Draper, John H.N. Fisher and Stephen T. Jurvetson are the Managing Directors of Fund IX Partners and each may be deemed to share voting and investment power over the securities held by Fund IX. Each of such individuals disclaims beneficial ownership over such securities except to the extent of his 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.
F3Each share of the issuer's Series D Preferred Stock automatically converted into 1 share of the issuer's Common Stock on August 2, 2017 in connection with the closing of the issuer's sale of its Common Stock in its IPO pursuant to the Registration Statement, and had no expiration date.
F4Each share of the issuer's Series E Preferred Stock automatically converted into 1 share of the issuer's Common Stock on August 2, 2017 in connection with the closing of the issuer's sale of its Common Stock in its IPO pursuant to the Registration Statement, and had no expiration date.
F5Each share of the issuer's Series F Preferred Stock automatically converted into 1 share of the issuer's Common Stock on August 2, 2017 in connection with the closing of the issuer's sale of its Common Stock in its IPO pursuant to the Registration Statement, and had no expiration date.
F6These securities are held of record by Draper Fisher Jurvetson Partners IX, LLC ("Partners IX"). Partners IX invests lockstep alongside Fund IX. Messrs. Draper, Fisher and Jurvetson are the Managing Members of Partners IX and each may be deemed to share voting and investment power over the securities held by Partners IX. Each of such individuals disclaims beneficial ownership over such securities except to the extent of his 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.
F7These securities are held of record by Draper Associates, L.P. ("DALP"). DALP invests lockstep alongside Fund IX. The general partner of DALP is Draper Associates, Inc., which is controlled by its President and majority shareholder, Timothy C. Draper. Mr. Draper may be deemed to have voting and investment power over the securities held by DALP. Mr. Draper disclaims beneficial ownership over such securities except to the extent of his 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.
F8These securities are held of record by Draper Associates Riskmasters Fund II, LLC ("DARF II"). DARF II invests lockstep alongside Fund IX, instead and in place of DALP beginning June 2010. Mr. Draper is the Managing Member of DARF II and may be deemed to have voting and investment power over the securities held by DARF II. Mr. Draper disclaims beneficial ownership over such securities except to the extent of his 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.
F9These securities are held of record by Draper Associates Riskmasters Fund III, LLC ("DARF III"). DARF III invests lockstep alongside Fund IX, instead and in place of DARF II beginning August 2013. Mr. Draper is the Managing Member of DARF III and may be deemed to have voting and investment power over the securities held by DARF III. Mr. Draper disclaims beneficial ownership over such securities except to the extent of his 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.