0001950047-26-004150.txt : 20260506 0001950047-26-004150.hdr.sgml : 20260506 20260506164749 ACCESSION NUMBER: 0001950047-26-004150 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: 26949350 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: Zhou Jeff CENTRAL INDEX KEY: 0001480772 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 144 MAIL ADDRESS: STREET 1: 6409 GUADALUPE MINES ROAD CITY: SAN JOSE STATE: CA ZIP: 95120 144 1 primary_doc.xml 144 0001480772 XXXXXXXX LIVE 0001280452 MONOLITHIC POWER SYSTEMS, INC. 000-51026 1555 Palm Beach Lakes Blvd. West Palm Beach FL 33401 (561) 839-3999 JEFF ZHOU Director Common Morgan Stanley Smith Barney LLC Executive Financial Services

1 New York Plaza 8th Floor New York NY 10004

500 825000.00 49130000 05/06/2026 NASDAQ Common 02/07/2013 Restricted Stock Issuer N 500 02/07/2013 Not Applicable N JEFF ZHOU

1555 Palm Beach Lakes Blvd. West Palm Beach FL 33401

Common 05/05/2026 1014 1609285.29 05/06/2026 /s/ Jeff Zhou