Transactions Table

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Explanation of Responses:

Id	Content
F1	Each share of Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock (collectively, the "Preferred Stock") automatically converted into one share of Common Stock on a one-for-one basis, immediately prior to the closing of the Issuer's initial public offering. The shares of Preferred Stock have no expiration date.
F2	Shares held by a limited partnership of which the Reporting Person is a trustee of a trust which is the general partner. The Reporting Person disclaims beneficial ownership in these shares except as to the Reporting Person's pecuniary interest therein.
F3	Shares held by a trust of which the Reporting Person is a Trustee. The Reporting Person disclaims beneficial ownership in these shares except as to the Reporting Person's pecuniary interest therein.
F4	Shares held by Sutter Hill Ventures, a California Limited Partnership ("SHV"). The Reporting Person is a managing director and member of the management committee of the general partner of SHV. The Reporting Person disclaims beneficial ownership in these shares except as to the Reporting Person's pecuniary interest therein.
F5	Shares held by an irrevocable trust of which the Reporting Person is a Trustee. The Reporting Person disclaims beneficial ownership in these shares except as to the Reporting Person's pecuniary interest therein.
F6	Shares held by SHM Investments, LLC ("SHMI"). The Reporting Person is a managing member of SHMI. The Reporting Person disclaims beneficial ownership in these shares except as to the Reporting Person's pecuniary interest therein.