Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Class A Common Stock^F1	Feb 26, 2019	C	3,808,957	$0.00	A	3,808,957	I	By Sequoia Capital XII, LP
Class A Common Stock^F1	Feb 26, 2019	C	142,525	$0.00	A	142,525	I	By Sequoia Technology Partners XII, LP
Class A Common Stock^F1	Feb 26, 2019	C	407,091	$0.00	A	407,091	I	By Sequoia Capital XII Principals Fund, LLC
Class A Common Stock^F1	Feb 26, 2019	J	3,808,957	$0.00	D	0	I	By Sequoia Capital XII, LP
Class A Common Stock^F1	Feb 26, 2019	J	142,525	$0.00	D	0	I	By Sequoia Technology Partners XII, LP
Class A Common Stock^F1	Feb 26, 2019	J	407,091	$0.00	D	0	I	By Sequoia Capital XII Principals Fund, LLC
Class A Common Stock^F3	Feb 26, 2019	J	3,524	$0.00	D	14,104	I	By Sequoia Capital U.S. Venture 2010-Seed Fund, L.P.

Table II — derivative securities

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Class B Common Stock^F1,F4	—	Feb 26, 2019	C	3,808,957	D	—	—	Class A Common Stock	3,808,957	60,943,316	I
Class B Common Stock^F1,F4	—	Feb 26, 2019	C	142,525	D	—	—	Class A Common Stock	142,525	2,280,394	I
Class B Common Stock^F1,F4	—	Feb 26, 2019	C	407,091	D	—	—	Class A Common Stock	407,091	6,513,448	I

Explanation of responses

F1SC XII Management, LLC ("SC XII Management") is the general partner of Sequoia Capital XII, L.P. and Sequoia Technology Partners XII, L.P. and is the managing member of Sequoia Capital XII Principals Fund, LLC. As a result, SC XII Management may be deemed to share voting and dispositive power with respect to the shares held by Sequoia Capital XII, L.P., Sequoia Technology Partners XII, L.P. and Sequoia Capital XII Principals Fund, LLC. Each of the Reporting Persons disclaims beneficial ownership of these securities except to the extent of its 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.
F2Represents a distribution of Class A Common Stock of the Issuer to partners or members and includes subsequent distributions by general partners or managing members to their respective partners or members.
F3SC US (TTGP), Ltd. is the general partner of SC U.S. Venture 2010 Management, L.P., which is the general partner of Sequoia Capital U.S. Venture 2010-Seed Fund, L.P. Each of the Reporting Persons disclaims beneficial ownership of these securities except to the extent of its 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.
F4The Issuer's Class B Common Stock is convertible into the Issuer's Class A Common Stock on a one-for-one basis at the Reporting Person's election and has no expiration date.