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.
SARIA TSENG filed Form 144 notices reporting dispositions of Common shares. The filing lists four sales: 25,674 shares on 03/30/2026 for $25,943,648.15, 22,876 shares on 02/06/2026 for $26,791,540.80, 7,636 shares on 04/06/2026 for $8,918,428.78, and 1,400 shares on 04/01/2026 for $1,586,924.78.
The filing also lists issuer grants of performance shares dated 07/20/2024 (4,835), 08/07/2024 (1,313), 11/07/2024 (1,306), and 02/07/2025 (1,510).
MONOLITHIC POWER SYSTEMS INC executive Saria Tseng sold 7,636 shares of Common Stock in open-market transactions. The EVP & General Counsel executed eight planned sales on April 6, 2026 under a Rule 10b5-1 trading plan adopted on November 28, 2025, at prices such as $1,139.96, $1,170.38 and $1,179.50 per share. After these trades, Tseng holds 169,022 shares directly and 1,000 shares indirectly through C&T Discovery Foundation.
MPWR filing a Form 144 notice for proposed sales of Common stock by an individual Saria Tseng. The excerpt lists three proposed sale dates with share counts: 1,400 on 04/01/2026, 25,674 on 03/30/2026, and 22,876 on 02/06/2026. The filing names Morgan Stanley Smith Barney LLC as the broker.
Monolithic Power Systems EVP & General Counsel Saria Tseng reported open-market sales of 1,400 shares of common stock on April 1, 2026. The trades occurred in multiple blocks at weighted average prices ranging from about $1,130.82 to $1,137.71 per share under a pre-arranged Rule 10b5-1 trading plan adopted on November 28, 2025. After these transactions, she directly holds 173,582 shares and has an additional 1,000 shares reported as indirectly held through C&T Discovery Foundation.
Monolithic Power Systems EVP Maurice Sciammas, through the Clement Sciammas Trust, sold 30 shares of common stock in an open-market transaction at $1,116.44 per share on April 1, 2026.
The trust held 1,239 shares after the sale as indirect ownership. Sciammas also held 178,644 shares directly, while other related trusts and accounts held additional indirect positions, including 49,460 shares in the Sciammas Family Trust and 26,660 shares in various Sciammas GRATs. The sale was made under a Rule 10b5-1 trading plan adopted on November 19, 2025.
Monolithic Power Systems EVP & General Counsel Saria Tseng reported selling a total of 25,674 shares of common stock in multiple open-market transactions on March 30, 2026. The weighted-average sale prices for these trades ranged from about $998 to $1,042 per share, as detailed in price-range footnotes.
The filing notes these transactions were executed under a pre-arranged Rule 10b5-1 trading plan adopted on November 28, 2025. After the sales, Tseng directly holds 174,982 shares and has an additional 1,000 shares held indirectly through the C&T Discovery Foundation.
Morgan Stanley Smith Barney LLC submitted a Form 144 notice relating to Common stock described as Performance Shares. The filing lists 1400 in the securities row and records recent sales by Saria Tseng: 22,876 shares on 02/06/2026 and 25,674 shares on 03/30/2026.
Theodore Bernhard Blegen reported multiple sales of Common Stock in a Form 144 notice. The excerpt lists four transactions dated 01/02/2026, 02/02/2026, 02/06/2026, and 03/02/2026 with share amounts of 3,000, 3,000, 21,725, and 3,000 respectively and dollar amounts shown for each sale.
Saria Tseng submitted a Form 144 notice relating to proposed sales of Common stock, listing 25,674 shares tied to Performance Shares with an original grant date of 08/07/2021. The filing also records a reported sale of 22,876 shares on 02/06/2026.
Monolithic Power Systems Inc: Schedule 13G/A Amendment
The Vanguard Group filed Amendment No. 15 reporting 0 shares beneficially owned of Monolithic Power Systems Inc Common Stock, representing 0% of the class. The filing explains an internal realignment effective January 12, 2026, and disaggregation of certain Vanguard subsidiaries under SEC Release No. 34-39538.