0001950047-24-004373.txt : 20240603 0001950047-24-004373.hdr.sgml : 20240603 20240603170734 ACCESSION NUMBER: 0001950047-24-004373 CONFORMED SUBMISSION TYPE: 144 PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20240603 DATE AS OF CHANGE: 20240603 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 IRS NUMBER: 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: 241014672 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 REPORTING-OWNER: COMPANY DATA: COMPANY CONFORMED NAME: Hsing Michael CENTRAL INDEX KEY: 0001308676 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 0001308676 XXXXXXXX LIVE 0001280452 MONOLITHIC POWER SYSTEMS, INC. 000-51026 5808 Lake Washington Blvd. NE Kirkland WA 98033 (425) 296-9956 MICHAEL HSING Officer Director Common Morgan Stanley Smith Barney LLC Executive Financial Services

1 New York Plaza 8th Floor New York NY 10004

8000 5848608.80 48672000 06/03/2024 NASDAQ COMMON 02/03/2024 Performance Shares ISSUER N 2183 02/03/2024 Not Applicable COMMON 05/07/2024 Performance Shares ISSUER N 1554 05/07/2024 Not Applicable COMMON 02/07/2024 Performance Shares ISSUER N 4263 02/07/2024 Not Applicable N MICHAEL HSING

5808 Lake Washington Blvd. NE Kirkland WA 98033

Common 05/08/2024 2823 1947869.81 MICHAEL HSING

5808 Lake Washington Blvd. NE Kirkland WA 98033

Common 05/01/2024 8000 5294837.60 MICHAEL HSING

5808 Lake Washington Blvd. NE Kirkland WA 98033

Common 04/01/2024 8000 5419520.00 06/03/2024 08/23/2023 /s/ Michael Hsing