Form 4: Monolithic Power Director Sells Shares Under 10b5-1 Plan

Monolithic Power Systems Director Victor K. Lee sold 600 shares of common stock at $930.86 per share under a pre-arranged 10b5-1 trading plan.

Summary

• Director Victor K. Lee of Monolithic Power Systems Inc. (MPWR) sold 600 shares of common stock.
• The transaction occurred on January 2, 2026, at a price of $930.86 per share.
• This sale was executed under a Rule 10b5-1 trading plan adopted on August 25, 2025.
• Following the transaction, Mr. Lee beneficially owns 27,967 shares of Monolithic Power Systems Inc. common stock.

Sentiment

Score: 5

Explanation: Neutral. The filing reports a routine insider stock sale executed under a pre-arranged 10b5-1 plan, which is a common practice for corporate insiders to manage their equity holdings without implying a specific sentiment about the company's future performance.

Industry Context

This transaction represents a routine insider stock sale by a director of Monolithic Power Systems Inc. and is not directly indicative of broader industry trends or competitive shifts. Such sales are common for corporate insiders managing their personal equity holdings.

Stakeholder Impact

• Shareholders: The sale represents a minor reduction in insider ownership, which is generally considered routine for planned transactions and unlikely to have a significant impact on shareholder sentiment or the company's valuation.

Key Dates

Recommendation

The filing details a routine insider sale executed under a pre-arranged 10b5-1 plan. This type of transaction is generally not indicative of a change in the company's fundamental outlook or a strong signal for future stock performance. Therefore, it does not warrant a change in investment recommendation based solely on this filing.

Keywords

Monolithic Power Systems, MPWR, Insider Trading, Form 4, Stock Sale, Director, Victor K. Lee, 10b5-1 Plan, Equity Transaction