Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock^F2	Mar 23, 2018	S	981,384	$27.637	D	3,049,486	I	See footnote
Common Stock^F3	Mar 23, 2018	S	25,252	$27.637	D	78,354	I	See footnote
Common Stock^F4	Mar 23, 2018	S	7,504	$27.637	D	23,315	I	See footnote

Table II — derivative securities

No Table II lines on this filing.

Explanation of responses

F1The Reporting Persons sold shares to the underwriters in connection with the closing of the Issuer's follow-on public offering. The reported sale price reflects the price at which the Reporting Person sold shares to the underwriters, which is net of underwriting commissions.
F2The shares are held of record by Meritech Capital Partners II L.P. ("MCP II"). Paul S. Madera and Michael B. Gordon, as the managing members of Meritech Management Associates II L.L.C., a managing member of Meritech Capital Associates II L.L.C., the general partner of MCP II, share voting and dispositive power with respect to the shares held by MCP II. Such persons and entities disclaim beneficial ownership of the securities held by MCP II except to the extent of any pecuniary interest therein.
F3The shares are held of record by Meritech Capital Affiliates II L.P. ("MCA II"). Messrs. Madera and Gordon, as the managing members of Meritech Management Associates II L.L.C., a managing member of Meritech Capital Associates II L.L.C., the general partner of MCA II, share voting and dispositive power with respect to the shares held by MCA II. Such persons and entities disclaim beneficial ownership of the securities held by MCA II except to the extent of any pecuniary interest therein.
F4The shares are held of record by MCP Entrepreneur Partners II L.P. ("Entrepreneur"). Messrs. Madera and Gordon, as the managing members of Meritech Management Associates II L.L.C., a managing member of Meritech Capital Associates II L.L.C., the general partner of Entrepreneur, share voting and dispositive power with respect to the shares held by Entrepreneur. Such persons and entities disclaim beneficial ownership of the securities held by Entrepreneur except to the extent of any pecuniary interest therein.