0001950047-26-004159.txt : 20260506 0001950047-26-004159.hdr.sgml : 20260506 20260506171021 ACCESSION NUMBER: 0001950047-26-004159 CONFORMED SUBMISSION TYPE: 144 PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20260506 DATE AS OF CHANGE: 20260506 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: MONOLITHIC POWER SYSTEMS INC CENTRAL INDEX KEY: 0001280452 STANDARD INDUSTRIAL CLASSIFICATION: SEMICONDUCTORS & RELATED DEVICES [3674] ORGANIZATION NAME: 04 Manufacturing EIN: 770466789 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 144 SEC ACT: 1933 Act SEC FILE NUMBER: 000-51026 FILM NUMBER: 26949642 BUSINESS ADDRESS: STREET 1: 1555 PALM BEACH LAKES BLVD. CITY: WEST PALM BEACH STATE: FL ZIP: 33401 BUSINESS PHONE: 561-839-3999 MAIL ADDRESS: STREET 1: 5808 LAKE WASHINGTON BLVD. NE CITY: KIRKLAND STATE: WA ZIP: 98033 REPORTING-OWNER: COMPANY DATA: COMPANY CONFORMED NAME: Xiao Deming CENTRAL INDEX KEY: 0001308647 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 144 MAIL ADDRESS: STREET 1: 79 GREAT OAKS BLVD CITY: SAN JOSE STATE: CA ZIP: 95119 144 1 primary_doc.xml 144 0001308647 XXXXXXXX LIVE 0001280452 MONOLITHIC POWER SYSTEMS, INC. 000-51026 1555 Palm Beach Lakes Blvd. West Palm Beach FL 33401 (561) 839-3999 DEMING XIAO Officer Common Morgan Stanley Smith Barney LLC Executive Financial Services

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30000 49636545.00 49130000 05/06/2026 NASDAQ Common 02/03/2026 Performance Shares Issuer N 30000 02/03/2026 Not Applicable Y 05/06/2026 /s/ Deming Xiao