Form S-1 Table of Content) DESCRIPTION OF CAPITAL STOCK The following description summarizes the terms of our capital stock. our amended and restated certificate of incorporation and our amended and restated bylaws. As it is only a summary. it does not contain all the information that may be important to you. For a complete description, you should refer to our amended and restated certificate of incorporation and amended and restated bylaws. each of which will be in effect upon the consummation of this offering. the forms of which are filed as exhibits to the registration statement of which this prospectus is a part. Our purpose is to engage in any lawful act or activity for which corporations may now or hereafter be organize) under the General Corporation Law of the State of Delaware. or the DGCL. Upon the consummation of this offering, our authorize) capital stock will consist of shares of common stock, par value $0.01 per share, and shares of preferred stock, par value $0.01 per share. As of 2015. there were shares of common stock outstanding held of record by stockholders. In addition, shams of our common stock were issuable upon exercise of outstanding options granted under the 2012 Plan. No shams of preferred stock will be issued or outstanding immediately after the offering contemplated by this prospectus. Unless our Board of Directors determines otherwise, we will issue all shares of our capital stock in uncenificated form. We. our executive officers, directors and all our existing stockholders, including the selling stockholders, will sign lock-up agreements with the underwriters that will, subject to certain customary exceptions, restrict the sale of the shares of our common stock and certain other securities held by them for 180 days following the date of this prospectus. J.P. Morgan Securities LLC and Citigroup Global Markets Inc. may. in their sole discretion and at any time without notice, release all or any portion of the shares