Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock^F1,F2	Aug 16, 2016	S	6,520	$4.0887	D	0	I	By Sequoia Venture
Common Stock^F3	holding	—	—		—	12,852,325	I	By Sequoia III
Common Stock^F4	holding	—	—		—	110,534	I	By Sequoia Partners
Common Stock^F5	holding	—	—		—	597,327	I	By Sequoia Principals

Table II — derivative securities

No Table II lines on this filing.

Explanation of responses

F1The transaction was executed in multiple trades at prices ranging from $4.06 per share to $4.1325 per share. The price reported above reflects the weighted average sales price. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.
F2Shares are held directly by Sequoia Capital U.S. Venture 2010 - Seed Fund, L.P. ("Sequoia Venture"). SC U.S. Venture 2010 Management, L.P., the general partner of Sequoia Venture, may be deemed to share voting and dispositive power with respect to the shares held by Sequoia Venture. SC US (TTGP), LTD., the general partner of SC U.S. Venture 2010 Management, L.P., may be deemed to share voting and dispositive power with respect to the shares held by Sequoia Venture. Each of these entities disclaims beneficial ownership of the securities held by Sequoia Venture, except to the extent of any pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership for purposes of Section 16 or for any other purposes.
F3Shares are held directly by Sequoia Capital Growth Fund III, L.P., ("Sequoia III"). SCGF III Management, LLC, the general partner of Sequoia III, may be deemed to share voting and dispositive power with respect to the shares held by Sequoia III. Each of these entities disclaims beneficial ownership of the securities held by Sequoia III, except to the extent of any pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership for purposes of Section 16 or for any other purposes.
F4Shares are held directly by Sequoia Capital Growth Partners III, L.P., ("Sequoia Partners"). SCGF III Management, LLC, the general partner of Sequoia Partners, may be deemed to share voting and dispositive power with respect to the shares held by Sequoia Partners. Each of these entities disclaims beneficial ownership of the securities held by Sequoia Partners, except to the extent of any pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership for purposes of Section 16 or for any other purposes.
F5Shares are held directly by Sequoia Capital Growth III Principals Fund LLC, ("Sequoia Principals"). SCGF III Management, LLC, the managing member of Sequoia Principals, may be deemed to share voting and dispositive power with respect to the shares held by Sequoia Principals. Each of these entities disclaims beneficial ownership of the securities held by Sequoia Principals, except to the extent of any pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership for purposes of Section 16 or for any other purposes.