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, Inc. declared a third quarter cash dividend of $1.56 per share. The dividend will be paid on October 15, 2025 to stockholders of record as of the close of business on September 30, 2025. The company disclosed this dividend in connection with a press release, which is included as an exhibit.
Theodore Blegen, EVP and CFO of Monolithic Power Systems (MPWR), reported multiple sales of common stock on 09/02/2025 under a Rule 10b5-1 trading plan adopted 02/26/2025. The Form 4 lists a series of dispositions at prices ranging roughly from $803.43 to $822.59, with weighted-average prices disclosed for several grouped lines. The reported transactions total 3,000 shares sold across multiple sale lots. Following these transactions the filing shows 40,939 shares held directly and two indirect holdings of 5,331 shares each in irrevocable trusts. The form was signed by an attorney-in-fact on behalf of Mr. Blegen.
Monolithic Power Systems (MPWR) director Eugen J. Elmiger reported multiple open-market sales of common stock on 08/29/2025. The Form 4 lists six sale transactions totaling 4,000 shares executed at weighted-average prices ranging roughly from $844.00 to $849.41. After the reported sales the filing shows the reporting person beneficially owned 17,213 shares. The transactions were signed by an attorney-in-fact and the filing includes explanations that each line reflects a weighted-average sale price with price ranges available on request.
Form 144 filing for Monolithic Power Systems, Inc. (MPWR) states that an insider intends to sell 3,000 shares of common stock through Morgan Stanley Smith Barney on 09/02/2025, with an aggregate market value reported as $2,443,025.70. The 3,000 shares match performance awards acquired in 2023 (dates: 05/07/2023, 06/30/2023, 07/20/2023 totaling 3,000 shares). The filer also reported prior sales by the same person of 6,000 shares on 07/01/2025 for $4,500,000.00 and 3,000 shares on 08/01/2025 for $2,250,000.00. The notice includes the signature representation that the seller is not aware of undisclosed material adverse information about the issuer.
Form 144 filing for Monolithic Power Systems, Inc. (MPWR). The notice reports a proposed sale of 4,000 shares of Common Stock on the NASDAQ with an aggregate market value of $3,386,844.86 and approximately 47,904,694 shares outstanding. The proposed approximate sale date is 08/29/2025, and the broker listed is Luzerner Kantonalbank AG, Pilatusstrasse 12, Luzern. The securities to be sold were acquired as Restricted Stock Units from the issuer on 10/23/2013 (2,500 shares) and 10/23/2014 (1,500 shares). The filer reports no securities sold by the person in the past three months. The filing includes the standard seller representation regarding material nonpublic information and a signature/attestation statement.
Jeff Zhou, a director of Monolithic Power Systems, Inc. (MPWR), reported an open-market sale of company stock. On 08/27/2025 he disposed of 193 shares at a reported price of $870 per share, and after the transaction he directly beneficially owned 5,611 shares. The Form 4 indicates the filing was submitted by one reporting person and signed by an attorney-in-fact on behalf of Mr. Zhou.
Form 144 filing for Monolithic Power Systems (MPWR) reports a proposed sale of 193 common shares through Morgan Stanley Smith Barney LLC on 08/27/2025. The filer discloses three prior restricted-stock acquisitions (48 shares on 02/12/2021; 133 shares on 02/02/2022; 12 shares on 02/08/2023) and two recent open-market sales by the same person: 400 shares sold 08/13/2025 for $340,000 and 200 shares sold 08/12/2025 for $166,000. The filing includes the broker, share counts, aggregate market value for the proposed sale ($167,910), and the statement that the filer is not aware of undisclosed material adverse information.
Monolithic Power Systems (MPWR) filed a Form 144 to notify a proposed sale of 1,499 shares of common stock through UBS Financial Services Inc. on 08/22/2025 on the NASDAQ. The filing shows an aggregate market value of 1,229,180 and reports 49,780,000 shares outstanding. The shares were received via GRAT distributions on 08/19/2025 from Maurice Sciammas in three lots of 669, 81, and 749 shares with related acquisition dates and prior donor acquisition dates noted. The filer reports no securities sold by the person in the past three months and certifies there is no undisclosed material adverse information about the issuer.
Monolithic Power Systems (MPWR) Form 4 summary: On 08/19/2025 Maurice Sciammas, EVP, Worldwide Sales & Marketing and trustee for multiple family trusts, reported several non‑sale transfers of MPWR common stock among trust and brokerage accounts. The filing shows a distribution of 1,000 shares from the Peter Rafferty and Eric Toothill 2021 Irrevocable Trust to an unrelated individual and 1,499 shares moved from Sciammas Siblings 2021 GRATs to the Rosalind Sciammas brokerage account, with a corresponding receipt of 1,499 shares into that brokerage account. The filing states no funds were exchanged for these transfers and that the reporting person lacks management, investment control or pecuniary interest over the 1,000‑share distribution.
Monolithic Power Systems (MPWR) Form 4 shows insider sales by Michael R. Hsing, who is listed as CEO and a director. On 08/15/2025 the reporting person, via an attorney-in-fact, sold multiple blocks of common stock in separate transactions totaling 20,231 shares. The reported sale prices per line are weighted averages ranging from about $825.06 to $836.50. After these transactions the filings show direct beneficial ownership levels on each line declining to a final reported direct holding of 814,667 shares. The filing also discloses indirect holdings of 133,040 shares held by the M Hsing 04 Trust and 12,825 shares held by the ZH Family 2020 Trust. The Form 4 is signed by an attorney-in-fact for Mr. Hsing and provides weighted-average price ranges for each sale line.