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Monolithic Power Systems is restating prior financial statements after identifying an unintentional error in accounting for deferred income taxes tied to a one-time foreign tax incentive. The correction reduces income tax benefit and net deferred income taxes by $194.6 million for the year ended December 31, 2024.
Earlier audited 2024 results and each 2025 quarterly report should no longer be relied on, and this annual report includes restated consolidated and quarterly financials. Management warns the restatement may affect investor confidence and increase professional costs, and it also discloses a material weakness that must be remediated.
The company remains a fabless analog and mixed-signal semiconductor provider with strong exposure to Asia, where 92% of 2025 revenue was generated. Key end markets include storage and computing, enterprise data and automotive, and risk factors highlight macroeconomic, China, supply-chain, customer concentration, and cybersecurity and AI-related regulatory risks.
Monolithic Power Systems declared that investors should no longer rely on its 2024 audited financial statements and 2025 quarterly results because of an unintentional tax accounting error tied to a one-time foreign tax incentive. The issue is non-cash, affects only income tax accounting, and involved no misconduct.
For 2024, the restatement reduces the income tax benefit and deferred taxes by about $195 million, lowering net income to $1,592 million. Non-GAAP metrics such as revenue, non-GAAP gross margin and non-GAAP net income are unchanged.
For 2025, the adjustment decreases income tax expense by $5.5 million, increasing net income by the same amount. The company says its business outlook for the quarter ending March 31, 2026 remains intact and will include the restated figures in its 2025 Form 10-K.
Monolithic Power Systems CEO Michael Hsing reported a series of open-market sales of company common stock on February 12, 2026. The Form 4 shows multiple sale transactions at prices ranging from $1,155.71 to $1,217.12 per share, including 12,731 shares at $1,155.71 and 4,992 shares at $1,159.84.
After these sales, Hsing held 888,234 shares directly. He also had indirect beneficial ownership of 133,040 shares through the M Hsing 04 Trust and 12,825 shares through the ZH Family 2020 Trust. The filing notes the transactions were made under a Rule 10b5-1 trading plan adopted on August 28, 2025.
Monolithic Power Systems CEO and director Michael Hsing reported a series of open-market sales of MPWR common stock. On February 11, 2026, he executed multiple Rule 10b5-1 plan trades, with weighted average prices ranging from $1,158.71 to $1,202.28 per share.
Following these transactions, Hsing directly owned 921,234 shares of common stock. He also had indirect beneficial holdings of 133,040 shares through the M Hsing 04 Trust and 12,825 shares through the ZH Family 2020 Trust.
Monolithic Power Systems executive Maurice Sciammas, EVP of Worldwide Sales & Marketing, reported an indirect open‑market sale of 200 shares of Common Stock on February 11, 2026. The shares were sold at $1,179.975 per share by the Clement Sciammas Trust, an entity associated with him.
After this sale, the Clement Sciammas Trust held 1,299 shares. The filing also shows other beneficial holdings, including 178,625 shares held directly and additional indirect positions through various Sciammas family trusts and brokerage accounts.
Michael Hsing filed a notice of proposed sale under Rule 144 covering 33,000 shares of Common Stock of MPWR through Morgan Stanley Smith Barney LLC on NASDAQ, with an aggregate market value of 38,670,192.00.
The shares to be sold were acquired as performance shares from the issuer on 02/03/2026 and 10/25/2025, totaling 14,902 and 18,098 shares. Common shares outstanding were 47,907,000. During the past three months, Hsing sold 33,000, 34,000, and 54,923 common shares for gross proceeds of 39,234,171.90, 38,837,373.80, and 64,323,823.90, respectively.
Monolithic Power Systems CEO Michael Hsing, who also serves as a director, sold a total of 34,000 shares of common stock on February 10, 2026 in a series of open-market transactions under a pre-arranged Rule 10b5-1 trading plan adopted on August 28, 2025. The reported weighted average sale prices on that date ranged from about $1,128.88 to $1,197.26 per share. Following these sales, Hsing directly owns 954,234 shares and indirectly holds 133,040 shares through the M Hsing 04 Trust and 12,825 shares through the ZH Family 2020 Trust.
Monolithic Power Systems director Victor K. Lee sold shares in a planned trade. On 02/09/2026, he executed an open‑market sale of 400 shares of common stock at $1,212.16 per share, and held 27,756 shares afterward. The sale was made under a pre‑arranged Rule 10b5‑1 trading plan adopted on 08/25/2025.
Monolithic Power Systems insider Michael Hsing filed a notice to sell 33,000 shares of MPWR common stock under Rule 144. The shares were acquired on 02/03/2026 as performance shares from the issuer and are to be sold through Morgan Stanley Smith Barney LLC on NASDAQ.
The planned sale has an aggregate market value of $39,234,171.90, based on 47,907,000 shares of common stock outstanding. Over the prior three months, Hsing reported additional MPWR common stock sales totaling 34,000 shares on 02/10/2026, 54,923 shares on 02/06/2026, and 30,000 shares on 11/12/2025.
Monolithic Power Systems executive Deming Xiao reported a tax-related stock sale. As EVP, Global Operations, he sold 22,875 shares of common stock on February 6, 2026 at an average price of $1,171.1637 per share.
According to the filing, the sale was made to cover taxes due upon the release of restricted stock units under the company’s equity incentive plan. After this transaction, Xiao directly held 235,932 shares, with additional indirect holdings of 20,455 shares owned by his spouse and 4,336 shares held by the Christopher Chao Xiao Trust.