AI Power Semiconductor Executives Sell Off Shares Worth Billions

Senior executives at Monolithic Power Systems Inc. (MPWR), a U.S. power semiconductor company, recently sold company shares in the multi-hundreds-of-millions-of-dollars range under pre-arranged trading plans. On March 30, Saria Cheng, EVP & General Counsel, sold tens of thousands of shares on the open market, raising approximately $28 million (₩380 billion), while still retaining more than 170,000 shares. On April 1, Morris Siammas, Vice President of Sales & Marketing, disposed of 30,000 shares in a single transaction for roughly $33.5 million (₩450 billion), and later that day Cheng sold several thousand additional shares for about $1.59 million (₩20 billion). Both executives, however, continue to hold significant equity stakes.

In its fourth-quarter 2025 earnings report released on February 5, Monolithic Power Systems posted revenue of $750 million, marking over 20% year-over-year growth. The company also raised its quarterly cash dividend from $1.56 to $2.00 per share, payable on April 15. Driven by robust demand for power solutions in AI data centers, results exceeded analysts’ expectations, and the stock price has nearly doubled over the past year amid sustained institutional buying and upward target-price revisions.

Monolithic Power Systems is a fabless designer of high-performance power semiconductors for data centers, automotive applications, and industrial equipment. Listed on the Nasdaq and included in the Philadelphia Semiconductor Index, MPS operates key sites in Schaffhausen, Switzerland, and Kirkland, Washington, supplying power-management chips to global customers. It is widely regarded as an indirect beneficiary of expanded AI infrastructure investments.