Welcome to our dedicated page for Monolithic Power SEC filings (Ticker: MPWR), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
The Monolithic Power Systems, Inc. (MPS) (Nasdaq: MPWR) SEC filings page provides access to the company’s regulatory disclosures as filed with the U.S. Securities and Exchange Commission. MPS is a fabless global semiconductor company that provides high-performance, semiconductor-based power electronics solutions, and its filings offer detailed insight into its financial condition, governance, and material events.
Investors researching MPWR can review current reports on Form 8-K that MPS files to announce significant developments. Recent 8-K filings have covered topics such as quarterly financial results, the furnishing of earnings press releases and commentary, and the declaration of cash dividends on common stock. These filings often attach press releases as exhibits, providing the full text of earnings announcements and dividend details.
Other 8-K filings document corporate governance changes, including amendments to the company’s bylaws. For example, MPS has reported an amendment that reduced the ownership threshold required for stockholders to call a special meeting, and explained the Board’s considerations in making that change.
Through its SEC reports, MPS also discloses information about its operations and structure, such as its status as a fabless company and the fact that it has operations in multiple locations in the United States, Europe, and Asia without maintaining a single headquarters location. Addresses included in filings are noted as being provided to satisfy SEC requirements.
On this page, Stock Titan surfaces MPS filings as they become available from EDGAR and applies AI-powered summaries to help explain the key points of lengthy documents. Users can quickly understand the main elements of earnings-related 8-Ks, dividend announcements, and governance updates, and then drill down into the full text when more detail is needed.
Whether you are looking for MPWR’s latest results of operations, information on cash dividends, or changes to its corporate bylaws, this SEC filings page offers a structured view of Monolithic Power Systems, Inc.’s regulatory disclosures, supported by AI-generated highlights for faster analysis.
Monolithic Power Systems EVP Maurice Sciammas reported an open-market sale of 30 shares of common stock on March 20, 2026. The sale was executed indirectly through the Clement Sciammas Trust at a weighted average price of $1,095.07 per share, with individual prices ranging from $1,094.79 to $1,095.19. Following the sale, the trust held 1,269 shares, while Sciammas also reported 178,644 shares held directly and additional indirect holdings through various family trusts and accounts. The transaction was carried out under a Rule 10b5-1 trading plan adopted on November 19, 2025.
MPWR affiliate(s) reported proposed dispositions of Common Stock. The notice lists multiple transactions by Maurice Sciammas and The Sciammas Trust, including dispositions on 02/04/2026 (21,590 shares), 02/06/2026 (1,286 shares), and 02/10/2026 (200 shares). The excerpt also records a gift of 120 shares dated 05/28/2025.
Monolithic Power Systems interim CFO Robert W. Dean II filed an initial ownership report showing his stake in the company’s common stock. He reports 8,060 shares held directly, which include 1,420 restricted stock units that vest over scheduled dates through February 15, 2030, subject to continued employment. He also reports 65 shares held indirectly, described as being held by “Parent & Daughter.” This filing does not reflect new buying or selling activity, but establishes his current ownership position as an executive officer.
Theodore Bernhard Blegen submitted a Rule 144 notice reporting the proposed sale of 3,000 performance shares of common stock. The filing also lists three recent dispositions: 21,725 shares on 02/06/2026 for $25,443,531.38, 3,000 shares on 02/02/2026 for $3,389,269.80, and 3,000 shares on 01/02/2026 for $2,821,403.10.
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.