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 (MPWR) disclosed an insider equity vesting: CEO and Director Michael R. Hsing was awarded 302,920 shares of common stock on October 25, 2025 at $0 per share after the Compensation Committee certified performance for previously granted market-based RSUs.
The MSUs, granted on October 25, 2022, were tied to five stock price targets and relative total stockholder return over a three-year period; all awarded shares fully vested on October 25, 2025.
Following the transaction, Hsing beneficially owned 1,117,587 shares directly, plus 133,040 held indirectly by the M Hsing 04 Trust and 12,825 held indirectly by the ZH Family 2020 Trust.
Monolithic Power Systems (MPWR) executive Deming Xiao, EVP, Global Operations, reported the acquisition of 135,520 shares of common stock on October 25, 2025 at $0 per share. The shares were awarded upon certification of performance for market-based restricted stock units (MSUs) granted on October 25, 2022, tied to five stock price targets and relative total stockholder return over a three-year period; all shares vested on October 25, 2025.
Following the transaction, the filing shows 256,180 shares beneficially owned directly, plus 20,455 shares indirectly by spouse and 4,336 shares indirectly by the Christopher Chao Xiao Trust.
Monolithic Power Systems (MPWR) reported an insider transaction for EVP, WW Sales & Marketing, Maurice Sciammas. On October 25, 2025, the Compensation Committee certified the performance of previously granted market-based RSUs, resulting in an award of 135,520 shares. All awarded shares fully vested on the same date at a reported price of $0.
Following the transaction, Sciammas beneficially owns 237,849 shares directly. The ending balance includes 4 shares acquired on August 15, 2025 through the company’s ESPP. The filing also lists multiple indirect holdings across family trusts and accounts.
Monolithic Power Systems (MPWR) reported an insider transaction by its EVP & General Counsel. On 10/24/2025, the reporting person sold 1,300 shares of common stock at a price of $1,087.62 per share under transaction code “S.” Following the sale, the filer beneficially owned 126,354 shares, held directly. The filing notes the trade was made pursuant to a Rule 10b5-1 trading plan adopted on 8/30/2024.
Monolithic Power Systems (MPWR) executive Saria Tseng, EVP & General Counsel, reported open-market sales of common stock under a Rule 10b5-1 plan. On 10/15/2025, she sold 14,028 shares at $1,016.18. On 10/16/2025, she sold 1,499 shares at $1,021.26 and 1,313 shares at $1,030.81. Following these transactions, her beneficial ownership decreased to 127,654 shares. The trading plan was adopted on 8/30/2024.
Monolithic Power Systems (MPWR) Form 4 reports multiple open-market sales by EVP and CFO Theodore Blegen executed on 10/01/2025 under a Rule 10b5-1 trading plan adopted 02/26/2025. The schedule shows a sequence of sales at weighted-average prices ranging from $902.61 to $917.17 per share across separate blocks, reducing Mr. Blegen's direct holdings from earlier reported balances down to 37,940 shares held directly. The filing also discloses indirect ownership of 5,331 shares in an irrevocable trust for Theodore F. Blegen and 5,331 shares in an irrevocable trust for Sarah N. Blegen. The form is signed by an attorney-in-fact.
Form 144 filing for MPWR (Monolithic Power Systems Inc.): The notice reports a proposed sale of 3,000 common shares to be executed through Morgan Stanley Smith Barney LLC on 10/01/2025 on NASDAQ, with an aggregate market value of $2,739,643.80. The shares were acquired as performance shares from the issuer on 07/20/2023 and paid for on that date. The filing lists 47,892,000 shares outstanding for the class. The filer, identified in sale history as Bernie Blegen, sold 3,000, 3,000, and 6,000 common shares on 09/02/2025, 08/01/2025, and 07/01/2025 respectively, generating gross proceeds of $2,443,025.70, $2,250,000.00, and $4,500,000.00.
Monolithic Power Systems (MPWR) director Carintia Martinez reported a sale of common stock under a 10b5-1 plan. On 09/18/2025 the reporting person sold 1,400 shares of Monolithic Power Systems common stock for a price reported as $900. After the sale the reporting person beneficially owned 878 shares. The filing states the transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on 11/27/2024 and the Form 4 was signed by an attorney-in-fact on 09/18/2025.
Saria Tseng, EVP & General Counsel of Monolithic Power Systems, reported a sale of 14,510 shares of the company's common stock on 09/18/2025 at a price of $914.45 per share. The filing notes the sale was made pursuant to a Rule 10b5-1 trading plan adopted on 08/30/2024. After the reported transaction, the filing shows beneficial ownership of 144,494 shares, which includes 27 shares acquired through the company's qualified ESPP on 02/17/2025. The form is signed by the reporting person and discloses the relationship to the issuer as an officer.
Form 144 notice from Monolithic Power Systems, Inc. (MPWR) discloses a proposed sale of 14,510 common shares through Morgan Stanley Smith Barney LLC on 09/18/2025 on the NASDAQ with an aggregate market value of $13,268,669.50. The shares were acquired as performance shares from the issuer on 07/20/2023 and the filing reports no securities sold in the past three months by the selling person. The filer attests they are not aware of undisclosed material adverse information and the notice includes the standard signatures and Rule 10b5-1 plan disclosure fields.