0001214659-21-011919.txt : 20211116 0001214659-21-011919.hdr.sgml : 20211116 20211116193331 ACCESSION NUMBER: 0001214659-21-011919 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20211112 FILED AS OF DATE: 20211116 DATE AS OF CHANGE: 20211116 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Xiao Deming CENTRAL INDEX KEY: 0001308647 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 000-51026 FILM NUMBER: 211417912 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-54057.xml PRIMARY DOCUMENT X0306 4 2021-11-12 0001280452 MONOLITHIC POWER SYSTEMS INC MPWR 0001308647 Xiao Deming 5808 LAKE WASHINGTON BLVD NE KIRKLAND WA 98033 false true false false Pres. of MPS Asia Operations Common Stock 2021-11-12 4 S false 1625 553.418 D 279630 D Common Stock 1101 I by Spouse The reported sales were to cover taxes upon the vesting of restricted stock units, as required by the Company's equity incentive plan. The amount of securities beneficially owned has been updated to reflect the correct amount of shares and corrects an inadvertent error on the Form 4 filed by the reporting person on November 10, 2021. /s/ Saria Tseng, attorney-in-fact for Mr. Deming Xiao 2021-11-16