Form 4: Monolithic Power CEO Plans Sale of 37,000 Shares

Monolithic Power Systems CEO Michael Hsing has filed a Form 4 indicating planned sales of 37,000 common shares under a Rule 10b5-1 trading plan on November 12, 2025.

Summary

• Michael Hsing, CEO and Director of Monolithic Power Systems Inc. (MPWR), reported planned sales of common stock.
• A total of 37,000 shares are scheduled to be sold on November 12, 2025.
• The sales are part of a pre-arranged Rule 10b5-1 trading plan.
• The shares are planned to be sold at prices ranging from approximately $957.18 to $980.25 per share.
• Following these planned transactions, Michael Hsing will directly beneficially own 918,669 shares of common stock.
• Additionally, 133,040 shares are indirectly owned by the M Hsing 04 Trust and 12,825 shares by the ZH Family 2020 Trust.

Sentiment

Score: 5

Explanation: The reported sales by the CEO and Director are executed under a pre-arranged Rule 10b5-1 trading plan, which are established in advance and do not necessarily reflect the insider's current view of the company's prospects. This makes the transaction a neutral event from a sentiment perspective.

Future Outlook

The filing details planned future transactions by the CEO under a Rule 10b5-1 plan, indicating a pre-scheduled divestment of shares rather than a forward-looking statement about company performance.

Industry Context

This filing is a routine insider transaction report and does not provide specific industry context or competitive analysis. However, insider trading activity in the semiconductor sector is often monitored for signals regarding executive confidence.

Stakeholder Impact

• Shareholders should note the planned reduction in direct ownership by the CEO, though it is part of a pre-scheduled plan and not a discretionary sale.

Key Dates

Keywords

Monolithic Power Systems, MPWR, Michael Hsing, Insider Trading, Form 4, Stock Sale, CEO, Director, 10b5-1 Plan, Semiconductor