Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Class A Common Stock^F2,F1,F3,F4	Aug 26, 2016	C	45,000	$0.00	A	45,000	I	See Footnotes
Class A Common Stock^F2,F5,F3,F4	Aug 26, 2016	S	45,000	$17.20	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,F6,F3,F4}	—	Aug 26, 2016	C	45,000	D	—	—	Class A Common Stock	45,000	3,589,023	I

Explanation of responses

F1Each share of Class B Common Stock is convertible into one share of Class A Common Stock at the option of the holder and has no expiration date.
F2On August 26, 2016, Bessemer Venture Partners VII L.P. ("BVP VII") sold 14,400 shares, Bessemer Venture Partners VII Institutional L.P. ("BVP VII Inst") sold 6,300 shares, and BVP VII Special Opportunity Fund L.P. ("BVP VII SOF," and together with BVP VII and BVP VII Inst, the "Funds") sold 24,300 shares at a sale price of $17.20.
F3Deer VII & Co. Ltd. ("Deer VII Ltd") is the general partner of Deer VII & Co. L.P. ("Deer VII LP" and, together with the Funds and Deer VII Ltd, the "Bessemer Entities"), which is the general partner of the Funds. Deer VII Ltd and Deer VII LP disclaim beneficial ownership of the securities held by the Funds, and this report shall not be deemed an admission that Deer VII Ltd and Deer VII LP 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.
F4Jeremy Levine, a director of Deer VII Ltd, serves as the representative of the Bessemer Entities on the Issuer's board of directors.
F5The shares were sold in a single execution, which took place at the price indicated above. The Reporting Person hereby undertakes, upon request of the Staff of the U.S. Securities and Exchange Commission, the Issuer or a security holder of the Issuer, to provide full information regarding such execution.
F6After the reported transaction, BVP VII owned 1,148,488 shares, BVP VII Inst owned 502,462 shares, and BVP VII SOF owned 1,928,073 shares.