X0202 4 2006-10-31 0 0000730000 SUPERTEX INC supx 0001351520 Tsang Michael 1235 BORDEAUX DR. SUNNYVALE CA 94089 0 1 0 0 VP, Standard Products common stock 2006-10-31 4 M 0 500 19.5625 A 772 D common stock 2006-10-31 4 M 0 2000 11.3 A 2772 D common stock 2006-10-31 4 S 0 500 44.48 D 2272 D common stock 2006-10-31 4 S 0 200 44.44 D 2072 D common stock 2006-10-31 4 S 0 200 44.42 D 1872 D common stock 2006-10-31 4 S 0 300 44.37 D 1572 D common stock 2006-10-31 4 S 0 200 44.35 D 1372 D common stock 2006-10-31 4 S 0 200 44.34 D 1172 D common stock 2006-10-31 4 S 0 400 44.33 D 772 D common stock 2006-10-31 4 S 0 100 44.31 D 672 D common stock 2006-10-31 4 S 0 100 44.3 D 572 D common stock 2006-10-31 4 S 0 300 44.26 D 272 D common stock 2006-10-31 4 S 0 200 44.33 D 72 D common stock 2006-10-31 4 S 0 72 44.27 D 0 D ISO Option (to exercise common stock) 19.5625 2006-10-31 4 A 0 500 19.5625 D 2005-12-01 2007-12-01 common stock 500 33500 D ISO Option (to exercise common stock) 11.3 2006-10-31 4 A 0 2000 11.3 D 2006-09-03 2009-09-03 common stock 2000 31500 D ISO Option (to exercise common stock). Exercise price: $11.3000. Shares granted: 3,500. Shares currently exercised: 2,000. 1,500 shares exercisable 9/3/2007. Expiration date: 9/3/2009. Held Direct. ISO Option (to exercise common stock). Exercise price: $17.34. Shares granted: 5,000. Shares exercisable: 2,000. 1,000 shares exercisable 12/1/2006. 1,000 shares exercisable 12/1/2007. 1,000 shares exercisable 12/1/2008. Expiration date: 12/1/2010. Held Direct ISO Option (to exercise common stock). Exercise price: $15.67. Shares granted: 5,000. Shares exercisable: 2,000. 1,000 shares exercisable 6/1/2007. 1,000 shares exercisable 6/1/2008. 1,000 shares exercisable 6/1/2009. Expiration date: 6/1/2011. Held Direct. ISO Option (to exercise common stock). Exercise price: $17.39. Shares granted: 5,000. Shares exercisable: 1,000. 1,000 shares exercisable 6/1/2007. 1,000 shares exercisable 6/1/2008. 1,000 shares exercisable 6/1/2009. 1,000 shares exercisable 6/1/2010. . Expiration date: 6/1/2012. Held Direct. ISO Option (to exercise common stock). Exercise Price: $33.6700. Shares: 9,500. Shares Exercisable: 0. 900 shares exercisable on 3/1/2007. 1,400 shares exercisable on 3/1/2008. 1,900 shares exercisable on 3/1/2009. 2,400 shares exercisable on 3/1/2010. 2,900 shares exercisable on 3/1/2011. Expiration Date: 3/1/2013. Held Direct. NQ Option (to exercise common stock). Exercise Price: $33.6700. Shares: 5,500. Shares Exercisable: 0. 500 shares exercisable on 3/1/2007. 25 shares exercisable on 3/1/2008. 1,000 shares exercisable on 3/1/2009. 1,500 shares exercisable on 3/1/2010. 2,475 shares exercisable on 3/1/2011. Expiration Date: 3/1/2013. Held Direct. ISO Option (to exercise common stock). Exercise price: $19.5625. Shares granted: 500. Shares currently exercised: 500. Expiration date: 12/01/2007. Held direct. Michael Tsang 2006-11-01