X0304 4 2011-09-01 0 0000730000 SUPERTEX INC supx 0001195893 PETERSEN WILLIAM 0 1 0 0 VP, Worldwide Sales NQ STOCK OPTIONS (TO EXERCISE COMMON STOCK) 19.51 2011-09-01 4 A 0 5000 19.51 A 2014-09-01 2021-09-01 COMMON STOCK 5000 55000 D NQ STOCK OPTIONS (TO EXERCISE COMMON STOCK) 19.51 2011-09-01 4 A 0 5000 19.51 A 2015-09-01 2021-09-01 COMMON STOCK 5000 60000 D NQ Option (to exercise common stock). Exercise Price: $33.9500. Shares Granted: 25,000. Shares Exercisable: 15,000. 5,000 shares exercisable on 12/03/2011. 5,000 shares exercisable on 12/03/2012. Expiration Date: 12/03/2017. Held Direct. NQ Option (to exercise common stock). Exercise Price: $20.8500. Shares Granted: 25,000. Shares Exercisable: 10,000. 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: 12/01/2018. Held Direct. NQ Option (to exercise common stock). Exercise Price: $19.5100. Shares Currently Being Granted: 10,000. Shares Exercisable: 0. 5,000 shares exercisable on 9/1/2014. 5,000 shares exercisable on 12/1/2015. Expiration Date: 9/1/2021. Held Direct. William Petersen 2011-09-01