Officer and Director Michael Hsing Files Intent to Sell $60 Million in Company Stock
MPWR has more than doubled off its 52-week low of $438.86 on elevated volume (1.9× avg).
Summary
Michael Hsing, an Officer and Director of Monolithic Power Systems Inc., has filed a Form 144 indicating his intent to sell 51,841 shares of common stock, valued at approximately $60.4 million.
Key Events · Ownership and Investor Activity · MPWR
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Intent to Sell Shares
Officer and Director Michael Hsing filed a Form 144 to sell 51,841 shares of common stock.
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Significant Value
The proposed sale has an approximate market value of $60,385,952.03.
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Executive Filer
The filer, Michael Hsing, holds positions as both an Officer and Director within the company.
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Prior Sales Activity
This proposed sale follows previous sales by Mr. Hsing of 70,000 shares, generating $67,294,300.00 in gross proceeds over the past three months.
Analysis · MPWR · Manufacturing
This Form 144 filing signals a significant disposition of shares by a key executive. Michael Hsing, an Officer and Director, intends to sell approximately $60.4 million worth of common stock. This proposed sale follows previous sales by Mr. Hsing totaling $67.3 million in the past three months, indicating a pattern of substantial share liquidation. While the shares were acquired through performance-based restricted stock units, the consistent and large-scale selling by a top insider could be interpreted negatively by investors, suggesting a lack of conviction or a desire to diversify holdings.
How filings like this one have moved
In the 30 days to Oct 5, 2026, 36.9% of the 966 measured filings Wiseek scored 8 moved their stock by 5% or more by the next session's close. The median move was -0.66%. These are measured outcomes after filings of this importance, not a forecast for this one.
Measured one observation per ticker per day, after exclusions. Current figures: Filing Impact Tracker · open dataset
At the time of this filing, MPWR was trading at $1,156.90 on NASDAQ in the Manufacturing sector, with a market capitalization of approximately $54.5B. The 52-week trading range was $438.86 to $1,226.30. This filing was assessed with negative market sentiment and an importance score of 8 out of 10.