Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Class A Common Stock^F2,F1,F4	Feb 28, 2017	C	3,084,652	$0.00	A	3,084,652	I	See Footnotes
Class A Common Stock^F2,F5,F4	Feb 28, 2017	J	3,084,652	$0.00	D	0	I	See Footnotes

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,F3,F4	—	Feb 28, 2017	C	3,084,652	D	—	—	Class A Common Stock	3,084,652	11,310,389	I

Explanation of responses

F1Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.
F2Represents 967,903 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners VII L.P. ("BVP VII"), 423,457 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners VII Institutional L.P. ("BVP VII Inst"), 1,633,337 shares converted from Class B Common Stock to Class A Common Stock by BVP Special Opportunity Fund VII L.P. ("BVP VII SOF"), and 59,955 shares converted from Class B Common Stock to Class A Common Stock by 15 Angels LLC ("BVP 15A" and together with BVP VII, BVP VII Inst, and BVP VII SOF, the "Funds").
F3After the conversion, 3,548,975 Class B Common shares are held by BVP VII, 1,552,677 Class B Common shares are held by BVP VII Inst, 5,988,900 Class B Common shares are held by BVP VII SOF and 219,837 Class B Common shares are held by BVP 15A.
F4Deer VII & Co. Ltd. ("Deer Ltd.") is the general partner of Deer VII & Co. L.P. ("Deer L.P."), which is the general partner of each of the Funds. Deer Ltd. and Deer L.P. disclaim beneficial ownership of the securities held by the Funds, and this report shall not be deemed an admission that Deer Ltd. and Deer L.P. are the beneficial owners of such securities, except to the extent of their pecuniary interest therein, if any, by virtue of their direct and indirect general partner interests in the Funds.
F5On February 28, 2017, BVP VII, BVP VII Inst, BVP VII SOF, and BVP 15A distributed, for no consideration, 967,903, 423,457, 1,633,337, and 59,995 shares (collectively, the "Shares"), respectively, of Class A Common Stock (the "DIK") to their limited partners and to Deer L.P., representing each such partner's pro rata interest in such Shares. On the same date, one or more of such limited partner(s) distributed, for no consideration, the Shares to certain of its or their members in an amount equal to each such member's or members' respective pro rata interests in the Shares. Finally, on the same date, Deer L.P. distributed, for no consideration, the Shares it received from the distributions to its members in an amount equal to each such member's pro rata interest in the Shares. All of the aforementioned distributions were made in accordance with the exemption afforded by Rules 16a-13 and 16a-9 of the Securities Exchange Act of 1934, as amended.