Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock^F1	Aug 11, 2015	S	1,043,763	$14.10	D	1,751,129	I	See Footnote
Common Stock^F2	Aug 11, 2015	S	572,045	$14.10	D	959,723	I	See Footnote
Common Stock^F3	Aug 11, 2015	S	51,692	$14.10	D	86,724	I	See Footnote

Table II — derivative securities

No Table II lines on this filing.

Explanation of responses

F1The securities are held by Highland Capital Partners VI Limited Partnership ("HCP VI"). Highland Management Partners VI, Inc. ("HMP VI INC") is the general partner of Highland Management Partnership VI Limited Partnership ("HMP VI LP"), which is the general partner of HCP VI. Each of HMP VI LP and HMP VI INC disclaims beneficial ownership of all shares held by HCP VI except to the extent, if any, of such entity's pecuniary interest therein.
F2The securities are held by Highland Capital Partners VI-B Limited Partnership ("HCP VI-B"). HMP VI LP is the general partner of HCP VI-B. Each of HMP VI LP and HMP VI INC disclaims beneficial ownership of all shares held by HCP VI-B except to the extent, if any, of such entity's pecuniary interest therein.
F3The securities are held by Highland Entrepreneurs' Fund VI Limited Partnership ("HEF VI"). HMP VI LP is the general partner of HEF VI. Each of HMP VI LP and HMP VI INC disclaims beneficial ownership of all shares held by HEF VI except to the extent, if any, of such entity's pecuniary interest therein.