0001280452-12-000101.txt : 20120502 0001280452-12-000101.hdr.sgml : 20120502 20120502182322 ACCESSION NUMBER: 0001280452-12-000101 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20120501 FILED AS OF DATE: 20120502 DATE AS OF CHANGE: 20120502 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Hsing Michael CENTRAL INDEX KEY: 0001308676 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 000-51026 FILM NUMBER: 12806807 MAIL ADDRESS: STREET 1: 6409 GUADALUPE MINES ROAD CITY: SAN JOSE STATE: CA ZIP: 95120 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: MONOLITHIC POWER SYSTEMS INC CENTRAL INDEX KEY: 0001280452 STANDARD INDUSTRIAL CLASSIFICATION: SEMICONDUCTORS & RELATED DEVICES [3674] IRS NUMBER: 770466789 STATE OF INCORPORATION: CA FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 6409 GUADALUPE MINES ROAD CITY: SAN JOSE STATE: CA ZIP: 95120 BUSINESS PHONE: (408) 826-0600 MAIL ADDRESS: STREET 1: 6409 GUADALUPE MINES ROAD CITY: SAN JOSE STATE: CA ZIP: 95120 4 1 edgardoc.xml PRIMARY DOCUMENT X0305 4 2012-05-01 0 0001280452 MONOLITHIC POWER SYSTEMS INC MPWR 0001308676 Hsing Michael 6409 GUADALUPE MINES ROAD SAN JOSE CA 95120 1 1 0 0 CEO Common Stock 2012-05-01 4 S 0 20000.0 22.0516 D 706022.0 D Common Stock 2012-05-02 4 S 0 3573.0 21.0019 D 702449.0 D Common Stock 498566.0 I By Jointly w/Spouse Common Stock 133040.0 I By S. Hsing 04 Trust Common Stock 133040.0 I by M Hsing 04 Trust In accordance with the reporting person's 10b5-1 trading plan. The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $22.00 to $22.30. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. Shares sold to pay tax obligations resulting from the vesting of restricted stock units. By: Meera Rao For: Michael Hsing 2012-05-02