Monolithic Power Systems EVP Sells $11.7M in Stock

Saria Tseng, the executive vice president, has been making a series of large stock sales over the past few months.

Apr. 11, 2026 at 10:25am

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An extreme close-up of the inner workings of a complex semiconductor manufacturing machine, with gears, circuits, and metallic components filling the frame in a high-contrast, industrial style.The heavy, industrial machinery behind Monolithic Power Systems' semiconductor innovations represents the company's technological prowess and financial strength.Kirkland Today

Saria Tseng, the executive vice president of Monolithic Power Systems (NASDAQ:MPWR), has sold a total of 66,548 shares of the company's stock over the past few months, netting over $11.7 million in proceeds. The sales were executed under a pre-arranged 10b5-1 trading plan.

Why it matters

Insider selling can sometimes signal a lack of confidence in a company's future prospects, though in this case the sales appear to be part of a planned divestment strategy rather than a reaction to any specific concerns. Monolithic Power Systems is a leading semiconductor company that has seen strong stock performance recently.

The details

Tseng, who has been with Monolithic Power Systems since 1997, sold the shares in several transactions between February and April 2026. The largest sale was on March 30th, when she offloaded 25,674 shares for over $25.9 million. Following the sales, Tseng still owns 156,983 shares in the company, valued at around $204.9 million.

  • On February 6th, Tseng sold 22,875 shares for $26,790,285.
  • On March 30th, Tseng sold 25,674 shares for $25,943,577.
  • On April 1st, Tseng sold 1,400 shares for $1,586,928.
  • On April 6th, Tseng sold 7,636 shares for $8,918,466.
  • On April 8th, Tseng sold 8,963 shares for $11,698,687.

The players

Saria Tseng

The executive vice president of Monolithic Power Systems who has been selling a significant amount of the company's stock over the past few months.

Monolithic Power Systems, Inc.

A fabless semiconductor company that designs and supplies high-performance power management solutions for a broad range of electronic systems.

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What’s next

Investors will likely continue to monitor Monolithic Power Systems' stock performance and any further insider trading activity by Saria Tseng and other company executives.

The takeaway

While the large stock sales by Monolithic Power Systems' EVP are notable, the transactions appear to be part of a pre-planned divestment strategy rather than a reaction to any specific concerns about the company's outlook. Monolithic Power Systems remains a strong performer in the semiconductor industry.