X0306 4 2015-11-10 0 0001130591 XENOPORT INC XNPT 0001597177 RICHARD KIM 3410 CENTRAL EXPRESSWAY SANTA CLARA CA 95051 0 1 0 0 SVP, CD&MA and CMO Employee Stock Options (right to buy) 6.38 2015-11-10 4 A 0 13000 0.00 A 2024-02-24 Common Stock 13000 26000 D On February 24, 2014, the reporting person was granted a stock option to purchase 26,000 shares of common stock. The option vested as to 6,500 of the shares subject to the option upon the compensation committee's certification that certain performance criteria had been met ("Performance Critieria 1"), which certification occurred on November 10, 2015, resulting in the vesting of the option as to 6,500 shares on that date. As a result of Performance Criteria 1 being satisfied, in addition to the vesting of the option as to 6,500 shares on November 10, 2015, an additional 6,500 of the shares subject to the option will now vest on November 10, 2016, subject to continuous service. Note this is in addition to the 13,000 options previously disclosed for meeting certain performance criteria ("Performance Criteria 2") which was certified on January 7, 2015. /s/ Stephanie L. Arata 2015-11-11