X0303 4 2010-06-14 0 0000730000 SUPERTEX INC supx 0001351519 Masood Ahmed 1235 BORDEAUX DR. SUNNYVALE CA 94089 0 1 0 0 VP, Marketing common stock 2010-06-14 4 M 0 3791 21.75 A 15791 D common stock 2010-06-14 4 M 0 4209 21.75 A 20000 D common stock 2010-06-14 4 M 0 2000 17.39 A 22000 D common stock 2010-06-14 4 M 0 5000 20.85 A 27000 D common stock 2010-06-14 4 S 0 90 26.2 D 26910 D common stock 2010-06-14 4 S 0 200 25.75 D 26710 D common stock 2010-06-14 4 S 0 378 25.92 D 26332 D common stock 2010-06-14 4 S 0 200 25.95 D 26132 D common stock 2010-06-14 4 S 0 100 26.14 D 26032 D common stock 2010-06-14 4 S 0 108 25.87 D 25924 D common stock 2010-06-14 4 S 0 100 26.19 D 25824 D common stock 2010-06-14 4 S 0 400 25.63 D 25424 D common stock 2010-06-14 4 S 0 102 25.6 D 25322 D common stock 2010-06-14 4 S 0 10 26.08 D 25312 D common stock 2010-06-14 4 S 0 1000 25.9 D 24312 D common stock 2010-06-14 4 S 0 500 25.72 D 23812 D common stock 2010-06-14 4 S 0 100 25.77 D 23712 D common stock 2010-06-14 4 S 0 100 25.76 D 23612 D common stock 2010-06-14 4 S 0 2901 25.85 D 20711 D common stock 2010-06-14 4 S 0 600 25.73 D 20111 D common stock 2010-06-14 4 S 0 711 25.7 D 19400 D common stock 2010-06-14 4 S 0 400 25.62 D 19000 D common stock 2010-06-14 4 S 0 200 25.66 D 18800 D common stock 2010-06-14 4 S 0 1600 25.5 D 17200 D common stock 2010-06-14 4 S 0 100 25.71 D 17100 D common stock 2010-06-14 4 S 0 1000 25.53 D 16100 D common stock 2010-06-14 4 S 0 998 25.64 D 15102 D common stock 2010-06-14 4 S 0 200 25.51 D 14902 D common stock 2010-06-14 4 S 0 300 25.54 D 14602 D common stock 2010-06-14 4 S 0 2602 25.43 D 12000 D ISO stock options (to exercise common stock) 21.75 2010-06-14 4 M 0 3791 21.75 D 2009-12-01 2011-12-01 common stock 3791 44209 D NQ Stock Options (to exercise common stock) 21.75 2010-06-14 4 M 0 4209 21.75 D 2007-12-01 2011-12-01 common stock 4209 40000 D NQ Stock Options (to exercise common stock) 17.39 2010-06-14 4 M 0 2000 17.39 D 2008-06-01 2012-06-01 common stock 2000 38000 D NQ Stock Options (to exercise common stock) 20.85 2010-06-14 4 M 0 5000 20.85 D 2009-12-01 2018-12-01 common stock 5000 33000 D 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. NQ Option (to exercise common stock). Exercise price: $20.85. Shares granted: 25,000. Currently exercisable and exercising: 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 2010-06-15