Security	Date	Code	Shares	Price	A/D	D/I	Nature of ownership
Common Stock^F8,F1	Sep 29, 2017	S	16,396	$1.7529	D	I	See footnote
Common Stock^F8,F2	Sep 29, 2017	S	901,768	$1.7529	D	I	See footnote
Common Stock^F8,F3	Sep 29, 2017	S	122,968	$1.7529	D	I	See footnote
Common Stock^F8,F4	Sep 29, 2017	S	393,497	$1.7529	D	I	See footnote
Common Stock^F8,F5	Sep 29, 2017	S	1,258,026	$1.7529	D	I	See footnote
Common Stock^F8,F6	Sep 29, 2017	S	136,865	$1.7529	D	I	See footnote
Common Stock^F8,F7	Sep 29, 2017	S	39,738	$1.7529	D	I	See footnote

Table II — derivative securities

No Table II lines on this filing.

Explanation of responses

F1Shares held of record by Sequoia Capital Entrepreneurs Annex Fund, L.P. ("SC EAF"). SC IX.I Management, LLC ("SC IX.I LLC") is the general partner of SC EAF. As a result, SC IX.I LLC may be deemed to share voting and dispositive power with respect to the shares held by SC EAF. Each of these entities disclaims beneficial ownership of the securities held by SC EAF 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.
F2Shares held of record by Sequoia Capital Franchise Fund L.P. ("SCFF"). SCFF Management, LLC ("SCFF LLC") is the general partner of SCFF and Douglas Leone and Michael Moritz are the managing members of SCFF LLC. As a result, each of Messrs. Leone and Moritz and SCFF LLC may be deemed to share voting and dispositive power with respect to the shares held by SCFF. Each of such Reporting Persons disclaims beneficial ownership of these securities except to the extent of his or 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.
F3Shares held of record by Sequoia Capital Franchise Partners L.P. ("SCFP"). SCFF LLC is the general partner of SCFP and Douglas Leone and Michael Moritz are the managing members of SCFF LLC. As a result, each of Messrs. Leone and Moritz and SCFF LLC may be deemed to share voting and dispositive power with respect to the shares held by SCFP. Each of such Reporting Persons disclaims beneficial ownership of these securities except to the extent of his or 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..
F4Shares held of record by Sequoia Capital IX, LP ("SC IX"). SC IX.I LLC is the general partner of SC IX. As a result, SC IX.I LLC may be deemed to share voting and dispositive power with respect to the shares held by SC IX. Each of these entities disclaims beneficial ownership of the securities held by SC IX except to the extent of its pecuniary interest, 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.
F5Shares held of record by Sequoia Capital XI, LP ("SC XI"). SC XI Management, LLC ("SC XI LLC") is the general partner of SC XI and Douglas Leone and Michael Moritz are the managing members of SC XI LLC. As a result, each of Messrs. Leone and Moritz and SC XI LLC may be deemed to share voting and dispositive power with respect to the shares held by SC XI. Each of such Reporting Persons disclaims beneficial ownership of these securities except to the extent of his or 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.
F6Shares held of record by Sequoia Capital XI Principals Fund, LLC ("SC XI PF"). SC XI LLC is the managing member of SC XI PF and Douglas Leone and Michael Moritz are the managing members of SC XI LLC. As a result, each of Messrs. Leone and Moritz and SC XI LLC may be deemed to share voting and dispositive power with respect to the shares held by SC XI PF. Each of such Reporting Persons disclaims beneficial ownership of these securities except to the extent of his or 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.
F7Shares held of record by Sequoia Technology Partners XI, LP ("SCTP XI"). SC XI LLC is the general partner of SCTP XI and Douglas Leone and Michael Moritz are the managing members of SC XI LLC. As a result, each of Messrs. Leone and Moritz and SC XI LLC may be deemed to share voting and dispositive power with respect to the shares held by SCTP XI. Each of such Reporting Persons disclaims beneficial ownership of these securities except to the extent of his or 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
F8The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.75 to $1.86, inclusive. The Reporting Persons undertake 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 (8).

Remarks

Form 1 of 2