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 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.
Monolithic Power Systems executive Saria Tseng reported selling 22,875 shares of common stock on February 6, 2026, at an average price of $1,171.1637 per share. The filing states these sales were made to cover taxes upon the release of restricted stock units under the company’s equity incentive plan.
After this transaction, Tseng beneficially owned 200,626 shares of Monolithic Power Systems common stock directly and 1,000 shares indirectly through C&T Discovery Foundation, according to the report.
Monolithic Power Systems executive Maurice Sciammas, EVP, WW Sales & Marketing, reported selling 22,875 shares of common stock on 02/06/2026 at $1,171.1637 per share. The sale, coded "S", was made to cover taxes due upon the release of restricted stock units, as required by the company’s equity incentive plan.
Following this tax-related sale, he directly holds 178,625 common shares and also has additional indirect holdings through various family trusts and brokerage accounts.
Monolithic Power Systems EVP and CFO Theodore Blegen sold 21,725 shares of common stock on February 6, 2026. The shares were sold at an average price of $1,171.1637 per share to cover taxes upon the release of restricted stock units under the company’s equity incentive plan.
After the sale, Blegen directly owned 82,353 shares of common stock and had indirect beneficial ownership of 5,331 shares in an irrevocable trust for Sarah N. Blegen and 5,331 shares in an irrevocable trust for Theodore F. Blegen.
Monolithic Power Systems CEO Michael Hsing reported a tax-related share sale. On 02/06/2026, he sold 54,923 shares of common stock at $1,171.1637 per share to cover taxes due upon the release of restricted stock units under the company’s equity incentive plan.
After this transaction, he held 988,234 shares directly. Additional indirect holdings were reported as 133,040 shares held by the M Hsing 04 Trust and 12,825 shares held by the ZH Family 2020 Trust.
Michael Hsing has filed a notice of proposed sale of 34,000 shares of common stock of MPWR, with an aggregate market value of 38,837,373.80. The shares are to be sold through Morgan Stanley Smith Barney LLC Executive Financial Services on the NASDAQ, with an approximate sale date of 02/10/2026.
The 34,000 shares were acquired as performance shares from the issuer on 02/03/2026. Over the past three months, Michael Hsing has sold additional common shares, including 54,923 shares on 02/06/2026 for gross proceeds of 64,323,823.90, and other sales on 11/12/2025 and 11/11/2025.
An affiliated holder of the issuer’s common stock has filed a notice of proposed sale under Rule 144 to sell 200 shares, with an aggregate market value of $240,000, on the NASDAQ around February 10, 2026. The filing states that 47,900,000 shares of this class were outstanding at the time of the notice.
The 200 shares to be sold were received on May 28, 2025 through two GRAT distributions from Maurice Sciammas, originally acquired as 81 shares on May 2, 2018 and 119 shares on May 7, 2014. The seller represents they are not aware of undisclosed material adverse information about the issuer’s operations.