144Filing Date: Sep 28, 2026
Monolithic Power Systems (MPWR)
Insider Proposed Sale Notice
View SEC Filing
ACC: 0001950047-26-009850
Sale Plan
MICHAEL HSING
Officer, Director·Monolithic Power Systems
Proposed
CommonNASDAQ
Shares30.00K
Est. DateSep 28
Market Value$40.35M
BrokerMorgan Stanley Smith Barney LLC Executive Financial Services
AcquisitionPerformance Shares · ISSUER
Acquired DateJun 30, 2023
Amount Acquired29.96K
10b5-1 Plan Adoption05/29/2026
% Outstanding0.0610%
10b5-1
Exercise / Payment Details
Paid: Jun 30, 2023Method: Not Applicable
auto_awesomeDeep Analysis
Deep Analysis
Michael Hsing, officer and director of Monolithic Power Systems, filed a Form 144 notice of intent to sell 30,000 common shares worth roughly $40.3M — one tranche of performance shares that vested 6/30/2023 — under a 10b5-1 plan adopted 5/29/2026.
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Signature & Compliance expand_more
Notice DateSep 28, 2026
10b5-1 Plan Adoption05/29/2026
Signature /s/ Michael Hsing
Issuer Info expand_more
CompanyMONOLITHIC POWER SYSTEMS, INC.
CIK0001280452
SEC File No.000-51026
Phone(561) 839-3999
Address1555 Palm Beach Lakes Blvd., West Palm Beach, FL 33401