Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock^F1,F2,F3	Aug 22, 2018	J	628,270	—	D	5,026,167	I	By Lightspeed Venture Partners VII, L.P.
Common Stock^F1,F2,F4	Aug 22, 2018	J	130,679	—	A	130,679	I	By Lightspeed General Partner VII, L.P.
Common Stock^F5,F2,F4	Aug 22, 2018	J	130,679	—	D	0	I	By Lightspeed General Partner VII, L.P.
Common Stock^F5,F6	Aug 22, 2018	J	19,146	—	A	71,635	I	By Barry Eggers Revocable Trust dtd 6/4/2008
Common Stock^F5,F7	Aug 22, 2018	J	19,564	—	A	73,199	D
Common Stock^F5,F8	Aug 22, 2018	J	19,146	—	A	71,635	D
Common Stock^F9	holding	—	—		—	10,192	I	By Lightspeed Venture Partners VIII, L.P.

Table II — derivative securities

No Table II lines on this filing.

Explanation of responses

F1Represents in-kind distribution by Lightspeed VII without consideration to its partners (including LGP VII, the general partner of Lightspeed VII).
F2Lightspeed Ultimate General Partner VII, Ltd. is the sole general partner of Lightspeed General Partner VII, L.P. ("LGP VII"), which is the sole general partner of Lightspeed Venture Partners VII, L.P. ("Lightspeed VII"). The individual directors of Lightspeed Ultimate General Partner VII, Ltd. are Christopher J. Schaepe, Barry Eggers, Ravi Mhatre and Peter Nieh. Messrs. Schaepe, Eggers, Mhatre, and Nieh disclaim their beneficial ownership of the shares except to the extent of their pecuniary interest therein. Mr. Schaepe is a director of the Issuer and files Section 16 reports separately.
F3The shares are held of record by Lightspeed VII.
F4The shares are held of record by LGP VII.
F5Represents in-kind distribution by LGP VII without consideration to its partners (including Messrs. Schaepe, Eggers, Mhatre, and Nieh).
F6The shares are held of record by Barry Eggers Revocable Trust dtd 6/4/2008, for which Barry Eggers serves as trustee.
F7The shares are held of record by Ravi Mhatre.
F8The shares are held of records by Peter Y. Nieh.
F9Lightspeed Ultimate General Partner VIII, Ltd. is the sole general partner of Lightspeed General Partner VIII, L.P. ("LGP VIII"), which is the sole general partner of Lightspeed Venture Partners VIII, L.P. ("Lightspeed VIII"). The individual directors of Lightspeed Ultimate General Partner VIII, Ltd. are Christopher J. Schaepe, Barry Eggers, Ravi Mhatre and Peter Nieh. Messrs. Schaepe, Eggers, Mhatre, and Nieh disclaim their beneficial ownership of the shares except to the extent of their pecuniary interest therein. Mr. Schaepe is a director of the Issuer and files Section 16 reports separately.