Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock^F2	Apr 10, 2018	S	858,505	$22.86	D	1,969,846	I	By: Foundry Group Select Fund, L.P.
Common Stock^F3	Apr 10, 2018	S	2,094,213	$22.86	D	4,886,496	I	By: Foundry Venture Capital 2007, L.P.

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 Persons sold shares to the underwriters, which is net of underwriting commissions.
F2The shares are held by Foundry Group Select Fund, L.P. The general partner of Foundry Group Select Fund, L.P. is Foundry Select Fund GP, LLC and has voting and dispositive power over these shares. Brad Feld, Seth Levine, Ryan McIntyre and Jason Mendelson are the managing members of Foundry Select Fund GP, LLC and share voting and dispositive power over these shares. Each of Foundry Select Fund GP, LLC, Mr. Feld, Mr. Levine, Mr. McIntyre and Mr. Mendelson disclaims beneficial ownership of the shares except to the extent of his or its respective pecuniary interest therein.
F3The shares are held by Foundry Venture Capital 2007, L.P. The general partner of Foundry Venture Capital 2007, L.P. is Foundry Venture 2007,LLC and has voting and dispositive power over these shares. Brad Feld, Seth Levine, Ryan McIntyre and Jason Mendelson are the managing members of Foundry Venture 2007, LLC and share voting and dispositive power over these shares. Each of Foundry Venture 2007, LLC, Mr. Feld, Mr. Levine, Mr. McIntyre and Mr. Mendelson disclaims beneficial ownership of the shares except to the extent of his or its respective pecuniary interest therein.