X0303 4 2010-06-11 0 0000730000 SUPERTEX INC supx 0001351519 Masood Ahmed 1235 BORDEAUX DR. SUNNYVALE CA 94089 0 1 0 0 VP, Marketing common stock 2010-06-11 4 M 0 10000 21.75 A 11000 D common stock 2010-06-11 4 M 0 1000 17.39 A 12000 D ISO stock options (to exercise common stock) 21.75 2010-06-11 4 M 0 10000 21.75 D 2010-06-11 2011-12-01 common stock 10000 49000 D ISO stock options (to exercise common stock) 17.39 2010-06-11 4 M 0 1000 17.39 D 2010-06-01 2012-06-01 common stock 1000 48000 D NQ Option (to exercise common stock). Exercise price: $17.39. Shares granted: 4,000. Shares exercised: 2,000. Shares exercisable: 2,000. Expiration date: 6/1/2012. Held Direct. NQ Option (to exercise common stock). Exercise price: $21.75. Shares granted: 7,015. Shares exercised: 2,806. Shares exercisable: 4,209. Expiration date: 12/1/2011. Held Direct. ISO Option (to exercise common stock). Exercise price: $21.75. Shares granted: 22,985. Shares exercised: 9,194. Shares currently exercising: 10,000 Shares exercisable: 3,791. Expiration date: 12/1/2011. Held Direct ISO Option (to exercise common stock). Exercise Price: $33.67. Shares Granted: 4,900. Shares Exercisable: 2,450. 2,450 shares Exercisable 3/1/2011. Expiration Date: 3/1/2013. Held Direct. NQ Option (to exercise common stock). Exercise Price: $33.67. Shares Granted: 8,100. Shares Exercisable: 3,550. 4,550 shares Exercisable 3/1/2011. Expiration Date: 3/1/2013. Held Direct. ISO Option (to exercise common stock). Exercise price: $17.39. Shares granted: 1,000. Currently exercising: 1,000. Expiration date: 6/1/2012. Held Direct. NQ Option (to exercise common stock). Exercise price: $20.85. Shares granted: 25,000. Currently exercisable: 5,000. 5,000 shares exercisable on 12/01/2010. 5,000 shares exercisable on 12/01/2011. 5,000 shares exercisable on 12/01/2012. 5,000 shares exercisable on 12/01/2013. Expiration Date: 12/1/2018. Held Direct. Ahmed Masood 2010-06-11