0001214659-21-011423.txt : 20211110 0001214659-21-011423.hdr.sgml : 20211110 20211110180149 ACCESSION NUMBER: 0001214659-21-011423 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20211108 FILED AS OF DATE: 20211110 DATE AS OF CHANGE: 20211110 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: 211398141 MAIL ADDRESS: STREET 1: 79 GREAT OAKS BLVD CITY: SAN JOSE STATE: CA ZIP: 95119 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: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 5808 LAKE WASHINGTON BLVD. NE CITY: KIRKLAND STATE: WA ZIP: 98033 BUSINESS PHONE: 425-296-9956 MAIL ADDRESS: STREET 1: 5808 LAKE WASHINGTON BLVD. NE CITY: KIRKLAND STATE: WA ZIP: 98033 4 1 marketforms-54050.xml PRIMARY DOCUMENT X0306 4 2021-11-08 0001280452 MONOLITHIC POWER SYSTEMS INC MPWR 0001308676 Hsing Michael 5808 LAKE WASHINGTON BLVD NE KIRKLAND WA 98033 true true false false CEO Common Stock 2021-11-08 4 S false 7813 548.27 D 987155 D Common Stock 133040 I by M Hsing 04 Trust Common Stock 12825 I ZH Family 2020 Trust The reported sales were to cover taxes upon the vesting of restricted stock units, as required by the Company's equity incentive plan. /s/ Saria Tseng, attorney-in-fact for Mr. Michael R. Hsing 2021-11-10