X0306 4 2015-06-29 0 0001051627 AXT INC AXTI 0001156899 HOU HONG Q 4281 TECHNOLOGY DRIVE FREMONT CA 94538 0 1 0 0 Chief Operating Officer Common Stock 2015-06-29 4 A 0 300000 0 A 300000 D Represents the grant of a restricted stock award, which 75,000 shares vested on 6/29/2015 and the remaining 225,000 shares vests in eight equal installments on each June 30 and December 31 (except there will be no such vesting for June 30, 2015), conditioned upon the Reporting Person's continued status as a service provider on each relevant vesting date. /s/ Hong Q. Hou 2015-06-29