X0306 4 2013-09-03 0 0000730000 SUPERTEX INC supx 0001351520 Tsang Michael 1235 BORDEAUX DR. SUNNYVALE CA 94089 0 1 0 0 VP, Operations & Product Eng. Non-Statutory Stock Option 23.06 2013-09-03 4 A 0 10000 A 2014-09-03 2023-09-03 no par value common stock 10000 10000 D The option becomes exercisable as to 2,000 shares on the first anniversary of September 3, 2013, date of grant and as to 2,000 shares on each of the second, third, fourth and fifth anniversaries of such date. The option was granted on September 3, 2013, under the issuer's 2009 Equity Incentive Plan, as amended, at no charge in connection with services rendered to the issuer. Michael Tsang 2013-09-04