Form 4: Monolithic Power CFO Sells Over $2.7M in Stock

Monolithic Power Systems' EVP and CFO, Theodore Blegen, sold 3,000 shares of common stock for approximately $2.7 million through a pre-arranged 10b5-1 trading plan.

Summary

• Theodore Blegen, Executive Vice President and Chief Financial Officer of Monolithic Power Systems Inc (MPWR), reported the sale of 3,000 shares of common stock.
• The sales occurred on October 1, 2025, at weighted average prices ranging from $902.61 to $917.17 per share.
• The total value of the shares sold is approximately $2,708,641.80.
• These transactions were executed pursuant to a Rule 10b5-1 trading plan adopted by Mr. Blegen on February 26, 2025.
• Following these transactions, Mr. Blegen directly beneficially owns 37,940 shares of common stock.
• Additionally, Mr. Blegen indirectly beneficially owns 5,331 shares in an Irrevocable Trust FBO Theodore F. Blegen and 5,331 shares in an Irrevocable Trust FBO Sarah N. Blegen, totaling 10,662 indirect shares.
• The ending direct balance includes 1 share acquired on August 15, 2025, through the Company's qualified ESPP program.

Sentiment

Score: 5

Explanation: The sentiment is neutral. While it's an insider sale, it was conducted under a pre-arranged 10b5-1 plan, which suggests a planned liquidity event or diversification rather than a reaction to new negative information. The sale represents a small portion of the insider's total beneficial ownership.

Negatives

• Insider selling, even when pre-planned, can sometimes be perceived negatively by investors as it reduces management's direct equity stake in the company.

Future Outlook

This filing does not contain any forward-looking statements or guidance regarding the company's future performance.

Industry Context

This Form 4 filing reports an individual insider transaction and does not provide broader industry context or trends.

Related Party Transactions

• Theodore Blegen indirectly holds shares in two irrevocable trusts (FBO Theodore F. Blegen and FBO Sarah N. Blegen), which are considered related party holdings.

Stakeholder Impact

• Shareholders may interpret the insider sale as a signal, though the 10b5-1 plan mitigates concerns about immediate negative outlook. The impact is likely minimal given the planned nature of the transaction.

Key Dates

Recommendation

A single insider sale, even by a CFO, executed under a pre-arranged 10b5-1 plan, typically does not provide a strong enough signal to warrant a 'buy' or 'sell' recommendation. Such sales are often for personal financial planning, diversification, or liquidity. Investors should 'hold' and monitor broader company performance and market conditions rather than reacting solely to this Form 4.

Keywords

MPWR, Monolithic Power Systems, Theodore Blegen, CFO, Insider Sale, Form 4, 10b5-1 Plan, Stock Transaction