0001195890-12-000003.txt : 20120315 0001195890-12-000003.hdr.sgml : 20120315 20120315205811 ACCESSION NUMBER: 0001195890-12-000003 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20120313 FILED AS OF DATE: 20120315 DATE AS OF CHANGE: 20120315 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: CHOY BENEDICT C K CENTRAL INDEX KEY: 0001195890 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 000-12718 FILM NUMBER: 12695575 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: SUPERTEX INC CENTRAL INDEX KEY: 0000730000 STANDARD INDUSTRIAL CLASSIFICATION: SEMICONDUCTORS & RELATED DEVICES [3674] IRS NUMBER: 942328535 STATE OF INCORPORATION: CA FISCAL YEAR END: 1221 BUSINESS ADDRESS: STREET 1: 1235 BORDEAUX DR CITY: SUNNYVALE STATE: CA ZIP: 94089 BUSINESS PHONE: 4087440100 MAIL ADDRESS: STREET 1: 1235 BORDEAUX DR CITY: SUNNYVALE STATE: CA ZIP: 94089 4 1 primary_doc.xml PRIMARY DOCUMENT X0304 4 2012-03-13 0 0000730000 SUPERTEX INC supx 0001195890 CHOY BENEDICT C K 1 1 0 0 Senior VP, Tech Development common stock 2012-03-13 4 S 0 205 18.07 D 158804 D common stock 2012-03-13 4 S 0 500 18.05 D 158304 D common stock 2012-03-13 4 S 0 191 18.04 D 158113 D common stock 2012-03-13 4 S 0 209 18.0404 D 157904 D common stock 2012-03-13 4 S 0 100 18.05 D 157804 D common stock 2012-03-13 4 S 0 500 18.0201 D 157304 D common stock 2012-03-13 4 S 0 500 18.0301 D 156804 D common stock 2012-03-13 4 S 0 500 18.02 D 156304 D common stock 2012-03-13 4 S 0 900 18.0001 D 155404 D common stock 2012-03-13 4 S 0 100 18.05 D 155304 D common stock 2012-03-14 4 S 0 294 17.8801 D 155010 D common stock 2012-03-14 4 S 0 200 17.8701 D 154810 D common stock 2012-03-14 4 S 0 300 17.9001 D 154510 D common stock 2012-03-14 4 S 0 300 17.9101 D 154210 D common stock 2012-03-14 4 S 0 400 17.9125 D 153810 D common stock 2012-03-14 4 S 0 400 17.901 D 153410 D common stock 2012-03-14 4 S 0 300 17.9001 D 153110 D common stock 2012-03-14 4 S 0 500 18.08 D 152610 D Benedict C.K. Choy 2012-03-15