FMR LLC Reports 9.1% Passive Stake in Monolithic Power Systems ($MPWR)
MONOLITHIC POWER SYSTEMS INC
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Filing Summary
FMR LLC Files Schedule 13G/A for Monolithic Power Systems, Inc. ($MPWR)
• Filer: FMR LLC & Abigail P. Johnson • Event Date: September 30, 2026 • Shares Beneficially Owned: 4,450,333.75 • Class Percentage: 9.1% • Voting Power: 4,165,785.75 (Sole), 0 (Shared) • Dispositive Power: 4,450,333.75 (Sole), 0 (Shared) • Filing Type: Schedule 13G/A (Amendment No. 4, Rule 13d-1(b))
Comprehensive Analysis
Executive Summary
On November 5, 2026, FMR LLC and Abigail P. Johnson filed Amendment No. 4 to Schedule 13G reporting beneficial ownership in Monolithic Power Systems, Inc. ($MPWR) as of the event date September 30, 2026.
Key Filing Details
- Issuer: Monolithic Power Systems, Inc. (CIK:
0001280452) - Reporting Entity: FMR LLC (Parent Holding Company / Control Person) and Abigail P. Johnson (Director, Chairman, and CEO of FMR LLC)
- Class of Securities: Common Stock (CUSIP:
609839105) - Aggregate Ownership: 4,450,333.75 shares
- Percentage of Class: 9.1%
- Voting & Dispositive Breakdown:
- Sole Voting Power: 4,165,785.75 shares (FMR LLC); 0 shares (Abigail P. Johnson)
- Shared Voting Power: 0 shares
- Sole Dispositive Power: 4,450,333.75 shares
- Shared Dispositive Power: 0 shares
Institutional Context & Subsidiary Information
The securities reported are held across various FMR LLC investment advisory and trustee entities, including:
- Fidelity Management & Research Company LLC (FMR Co. LLC) (beneficially owns 5% or greater of the outstanding class)
- FIAM LLC
- Fidelity Diversifying Solutions LLC
- Fidelity Institutional Asset Management Trust Company
- Fidelity Management Trust Company
- FMR Investment Management (UK) Limited
- Strategic Advisers LLC
Significance
This filing represents a routine passive investor update filed under Rule 13d-1(b), indicating no intent to acquire or influence control of Monolithic Power Systems. Holding a 9.1% stake underscores FMR LLC's continued major institutional presence as one of the issuer's leading shareholders.
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Important Disclaimer
This content is drawn from public SEC filings and may contain errors. It is for informational purposes only and is not investment, legal, or tax advice.
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