Security	Date	Code	Shares	Price	A/D	Owned after	D/I
Class A Common Stock^F1,F2,F3	Dec 31, 2014	C	1,103,321	—	A	1,103,321	D
Class A Common Stock^F1,F4,F5	Dec 31, 2014	C	1,103,321	—	A	1,103,321	D
Class A Common Stock^F1,F6,F7	Dec 31, 2014	C	2,206,640	—	A	2,206,640	D

Table II — derivative securities

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	D/I
Class B Common Stock^F1,F2,F3	—	Dec 31, 2014	C	1,103,321	D	—	—	Class A Common Stock	1,103,321	D
Class B Common Stock^F1,F4,F5	—	Dec 31, 2014	C	1,103,321	D	—	—	Class A Common Stock	1,103,321	D
Class B Common Stock^F1,F6,F7	—	Dec 31, 2014	C	2,206,640	D	—	—	Class A Common Stock	2,206,640	D

Explanation of responses

F1Each share of Class B Common Stock, which has no expiration date, is convertible at any time at the option of the holder into one share of Class A Common Stock. In addition, each share of Class B Common Stock will automatically convert into one share of Class A Common Stock (a) upon transfer thereof, subject to certain exceptions, (b) upon the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate number of shares of the then outstanding Class A Common Stock and Class B Common Stock, or (c) in the event that holders of at least 66 2/3% of the then outstanding shares of Class B Common Stock elect to convert all shares of Class B Common Stock into shares of Class A Common Stock.
F2These securities are owned solely by HarbourVest Partners VIII-Venture Fund, L.P. ("HV Ventures"). HarbourVest Partners, LLC is the managing member of HarbourVest VIII-Venture Associates LLC, which is the general partner of HarbourVest VIII-Venture Associates L.P., which is the general partner of HV Ventures. Each of HarbourVest Partners, LLC, HarbourVest VIII-Venture Associates LLC and HarbourVest VIII-Venture Associates L.P. may be deemed to have a beneficial interest in the securities held by HV Ventures and each disclaims beneficial ownership of the securities held by HV Ventures, except to the extent of its pecuniary interest which is subject to indeterminable future events.
F3Each of HV Co-Invest (as defined below), HIPEP VI Select Associates LLC, HIPEP VI Select Associates L.P., HV Direct (as defined below), HarbourVest 2007 Direct Associates LLC and HarbourVest 2007 Direct Associates L.P. disclaims beneficial ownership of the securities held by HV Ventures and this report shall not be deemed an admission that any such reporting person is the beneficial owner of such securities for purposes of Section 16 of the Securities Exchange Act or for any other purpose.
F4These securities are owned solely by HarbourVest/NYSTRS Co-invest Fund L.P. ("HV Co-Invest"). HarbourVest Partners, LLC is the managing member of HIPEP VI Select Associates LLC, which is the general partner of HIPEP VI Select Associates L.P., which is the general partner of HV Co-Invest. Each of HarbourVest Partners, LLC, HIPEP VI Select Associates LLC and HIPEP VI Select Associates L.P. may be deemed to have a beneficial interest in the securities held by HV Co-Invest and each disclaims beneficial ownership of the securities held by HV Co-Invest, except to the extent of its pecuniary interest which is subject to indeterminable future events.
F5Each of HV Ventures, HarbourVest VIII-Venture Associates LLC, HarbourVest VIII-Venture Associates L.P., HV Direct, HarbourVest 2007 Direct Associates LLC and HarbourVest 2007 Direct Associates L.P. disclaims beneficial ownership of the securities held by HV Co-Invest and this report shall not be deemed an admission that any such reporting person is the beneficial owner of such securities for purposes of Section 16 of the Securities Exchange Act or for any other purpose.
F6These securities are owned solely by HarbourVest Partners 2007 Direct Fund L.P. ("HV Direct"). HarbourVest Partners, LLC is the managing member of HarbourVest 2007 Direct Associates LLC, which is the general partner of HarbourVest 2007 Direct Associates L.P., which is the general partner of HV Direct. Each of HarbourVest Partners, LLC, HarbourVest 2007 Direct Associates LLC and HarbourVest 2007 Direct Associates L.P. may be deemed to have a beneficial interest in the securities held by HV Direct and each disclaims beneficial ownership of the securities held by HV Direct, except to the extent of its pecuniary interest which is subject to indeterminable future events.
F7Each of HV Co-Invest, HIPEP VI Select Associates LLC, HIPEP VI Select Associates L.P., HV Ventures, HarbourVest VIII-Venture Associates LLC and HarbourVest VIII-Venture Associates L.P. disclaims beneficial ownership of the securities held by HV Direct and this report shall not be deemed an admission that any such reporting person is the beneficial owner of such securities for purposes of Section 16 of the Securities Exchange Act or for any other purpose.