Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Class A Common Stock^F1,F2	Sep 4, 2018	C	1,053,868	$0.00	A	1,053,868	I	See Footnote
Class A Common Stock^F3,F2	Sep 5, 2018	J	1,042,337	—	D	11,531	I	See Footnote
Class A Common Stock^F4,F2	Sep 5, 2018	S	1,202	$26.792	D	10,329	I	See Footnote
Class A Common Stock^F5,F2	Sep 5, 2018	S	10,329	$26.2411	D	0	I	See Footnote
Class A Common Stock^F1,F6	Sep 4, 2018	C	3,860	$0.00	A	3,860	I	See Footnote
Class A Common Stock^F7,F6	Sep 5, 2018	S	402	$26.792	D	3,458	I	See Footnote
Class A Common Stock^F8,F6	Sep 5, 2018	S	3,458	$26.2411	D	0	I	See Footnote
Class A Common Stock^F1,F9	Sep 4, 2018	C	13,389	$0.00	A	13,389	I	See Footnote
Class A Common Stock^F10,F9	Sep 5, 2018	S	1,396	$26.792	D	11,993	I	See Footnote
Class A Common Stock^F11,F9	Sep 5, 2018	S	11,993	$26.2411	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
Class B Common Stock^F2,F1	—	Sep 4, 2018	C	1,053,868	D	—	—	Class A Common Stock	1,053,868	3,161,606	I
Class B Common Stock^F6,F1	—	Sep 4, 2018	C	3,860	D	—	—	Class A Common Stock	3,860	11,582	I
Class B Common Stock^F9,F1	—	Sep 4, 2018	C	13,389	D	—	—	Class A Common Stock	13,389	40,167	I

Explanation of responses

F1At the request of the holder, on September 4, 2018, each such share of the issuer's Class B Common Stock converted into one (1) share of the issuer's Class A Common Stock.
F10The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $26.705 - $27.05, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F11The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.70 - $26.68, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F2The securities are held by Index Ventures Growth II (Jersey), L.P. ("IVG II"). Index Venture Growth Associates II Limited ("Associates") is the general partner of IVG II. Associates disclaims Section 16 beneficial ownership of the securities held by IVG II, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that Associates is the beneficial owner of such securities for Section 16 or any other purpose.
F3On September 5, 2018, IVG II distributed, for no consideration, 1,042,337 shares of Class A Common Stock of the issuer to its limited partners, representing each such partner's pro rata interest in the shares held by IVG II. The aforementioned distributions were made in accordance with the exemptions afforded by Rule 16a-13 and Rule 16a-9 of the Securities Exchange Act of 1934, as amended.
F4The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $26.705 - $27.05, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F5The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.70 - $26.68, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F6The securities are held directly by Index Ventures Growth II Parallel Entrepreneur Fund (Jersey), L.P. ("Parallel"). Associates is the general partner of Parallel. Associates disclaims Section 16 beneficial ownership of the securities held by Parallel, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that Associates is the beneficial owner of such securities for Section 16 or any other purpose.
F7The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $26.705 - $27.05, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F8The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.70 - $26.68, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F9The securities are held directly by Yucca (Jersey) SLP ("Yucca"). The general partner of Yucca is Yucca Associates Limited ("YAL"). YAL disclaims Section 16 beneficial ownership of the securities held by Yucca, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that YAL is the beneficial owner of such securities for Section 16 or any other purpose.