X0306 4/A 2014-01-30 2014-01-30 0 0000730000 SUPERTEX INC supx 0001351520 Tsang Michael 1235 BORDEAUX DR. SUNNYVALE CA 94089 0 1 0 0 VP, Operations & Product Eng NQ Stock options (to exercise common stock) 20.85 2014-01-30 4 M 0 3500 20.85 A 2011-12-01 2018-12-01 Common Stock 3500 46500 D This Form 4 amendment is being filed to correct a previous clerical error made with respect to the number of options outstanding (number of derivative securities beneficially owned following reported transaction). Michael Tsang 2014-01-30