MPWR Plummets 0.91% as $400M Volume Surges to 260th Rank on Director Zhou's $168K Share Sale

On August 28, 2025, Monolithic Power Systems (MPWR) closed down 0.91% with a trading volume of $0.40 billion, a 43.43% increase from the previous day, ranking 260th in volume activity. The stock’s recent performance was influenced by an insider transaction reported on August 27, 2025, when director Jeff Zhou sold 193 shares at $870 apiece, totaling $167,910. Post-transaction, Zhou retained direct ownership of 5,611 shares.

The sale, disclosed via a Section 16 filing, is classified as a routine insider disposition. While the transaction aligns with standard reporting requirements, it lacks additional context such as Zhou’s total holdings or strategic rationale for the sale. Analysts note that such small-scale insider trades typically do not signal broader corporate strategy shifts but may warrant monitoring for future activity patterns among executives.

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