-year terms. Our current directors will be divided among the three classes as follows: • the Class I directors will be Messrs. Dorsey, Johnson, and Viniar, and their terms will expire at the annual meeting of stockholders to be held in 2016: • the Class II directors will be Messrs. Botha and McKelvey

B convertible preferred stock; • Ms. Meeker was elected as the designee nominated by holders of our Series C convertible preferred stock; and • Mr. Viniar was elected as a designee nominated by holders of a majority of each of our common stock and our convertible preferred stock. In connection with th

from Harvard University. Dr. Summers was selected to serve on our board of directors because of his extensive policy experience. David Viniar. Mr. Viniar has served as a member of our board of directors since October 2013. From August 1980 until his retirement in January 2013, Mr. Viniar served in var

York Stock Exchange, our board of directors has appointed David Viniar to serve as our Lead Independent Director. As Lead Independent Director, Mr. Viniar will preside over periodic meetings of our independent directors, serve as a liaison between our Chairman and our independent directors, and perfor

mmers' continued service with us. As of December 31, 2014, Dr. Summers held 161,000 restricted shares of our common stock. On October 30, 2013, Mr. Viniar was granted an option to purchase 326,950 shares of our common stock. This option is early exercisable. One-fourth of the shares subject to the opti