0001214659-23-005047.txt : 20230406 0001214659-23-005047.hdr.sgml : 20230406 20230406164813 ACCESSION NUMBER: 0001214659-23-005047 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20230403 FILED AS OF DATE: 20230406 DATE AS OF CHANGE: 20230406 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: 23806825 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-61126.xml PRIMARY DOCUMENT X0407 4 2023-04-03 0001280452 MONOLITHIC POWER SYSTEMS INC MPWR 0001308676 Hsing Michael 5808 LAKE WASHINGTON BLVD NE KIRKLAND WA 98033 true true false false CEO 0 Common Stock 2023-04-03 4 S false 11100 487.99 D 1050049 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. 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 $487.99 to $488.00. 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. Ending balance includes 33 shares acquired on February 15, 2023 through the Company's qualified ESPP program. /s/ Saria Tseng, attorney-in-fact for Mr. Michael R. Hsing 2023-04-05