Monolithic Power Systems filings document regulatory disclosures for a fabless semiconductor company focused on power electronics solutions. Its 8-K filings furnish quarterly and annual operating results, earnings commentary, cash dividend declarations, officer-transition disclosures, and other material events tied to financial reporting.
The filing record also includes proxy materials covering annual meeting matters, director and executive compensation disclosures, and stockholder voting procedures. Other filings describe governance amendments such as bylaw changes affecting special-meeting rights, and reporting-controls matters including non-reliance determinations and restatement-related disclosures for previously issued financial statements.
MPWR shareholder Maurice Sciammas filed a notice to sell 15000 shares of common stock through Morgan Stanley Smith Barney LLC Executive Financial Services, referencing a valuation of 20245944.00 and 49130000 shares outstanding, with an approximate sale date of 07/15/2026 on NASDAQ.
The notice also lists prior sales over the preceding three months, including 12000 shares on 05/15/2026 for 18736864.80, and smaller transactions of 380 shares on 05/05/2026 and 30-share lots on 05/04/2026, 06/01/2026, and 07/01/2026.
Invesco Ltd. reported beneficial ownership of 2,510,980 shares of Monolithic Power Systems, Inc. common stock as of 12/31/2025, representing 5.2% of the outstanding class. The shares are held of record by clients of investment advisers that are subsidiaries of Invesco Ltd.
Invesco has sole power to vote or direct the vote of 2,491,947 shares and sole power to dispose or direct the disposition of 2,510,980 shares, with no shared voting or dispositive power. No single client has more than 5% economic ownership of these securities, and those clients are entitled to dividends and sale proceeds.
Invesco reports in its capacity as a parent holding company, with relevant subsidiaries including Invesco Advisers, Inc., Invesco Investment Advisers LLC, Invesco Capital Management LLC, Invesco Asset Management (Japan) Limited, and Invesco Management S.A. The report is signed by the Global Head of Compliance on 07/15/2026.
FMR LLC filed an amended Schedule 13G/A reporting beneficial ownership of 5,175,258.99 shares of Monolithic Power Systems Inc. The filing shows this stake represents 10.5% of the class as of 06/30/2026. The cover lists CUSIP 609839105 and identifies Abigail P. Johnson as having dispositive power over the same 5,175,258.99 shares. The amendment is signed under a power of attorney dated 04/13/2026 and includes an Exhibit 99 reference for a 13d-1(k)(1) agreement.
Monolithic Power Systems executive Maurice Sciammas, EVP of Worldwide Sales & Marketing, reported an open-market sale of 30 shares of Common Stock at $1,351.61 per share by the Clement Sciammas Trust on July 1, 2026. The transaction was carried out under a Rule 10b5-1 trading plan adopted on November 19, 2025, indicating it was pre-scheduled. After this sale, the Clement Sciammas Trust held 1,149 shares indirectly. The filing also lists Sciammas’s broader holdings, including 166,644 shares held directly and additional indirect positions in various family trusts, GRATs, and brokerage accounts.
Monolithic Power Systems reported the results of its 2026 annual stockholder meeting and announced a second quarter 2026 cash dividend. Stockholders elected two Class I directors, Victor K. Lee and Jeff Zhou, for three-year terms, with each nominee receiving over 39 million votes in favor. They also ratified Ernst & Young LLP as independent registered public accounting firm for the year ending December 31, 2026, and approved, on an advisory basis, 2025 compensation for the company’s named executive officers. Separately, the board declared a cash dividend of $2.00 per common share, payable on July 15, 2026 to stockholders of record as of June 30, 2026.
MONOLITHIC POWER SYSTEMS INC EVP Maurice Sciammas reported a small preplanned insider sale through a family trust. A trust named Clement Sciammas Trust sold 30 shares of common stock at $1,533.95 per share in an open-market transaction made pursuant to a Rule 10b5-1 trading plan adopted on 11/19/2025. Following this sale, that trust held 1,179 shares indirectly, while Sciammas also reported 166,644 shares held directly, suggesting this was a minor, routine disposition relative to his overall reported holdings.
Monolithic Power Systems executive Maurice Sciammas reported a bona fide gift of 12,472 shares of Common Stock held through various Sciammas GRATs. The shares were distributed from these grantor retained annuity trusts to individuals who are not immediate family members sharing the same household.
No funds were exchanged and no sale of shares occurred in these distributions, so this is a non-cash transfer rather than a market trade. After the distributions, the GRATs and Sciammas no longer have any pecuniary interest in the gifted shares, while separate direct and indirect Common Stock holdings are reported, including 166,644 shares held directly and 12,625 shares held indirectly through various Sciammas GRATs.
Theodore Bernhard Blegen filed a notice under Form 144 reporting proposed sales of Common Stock through Morgan Stanley Smith Barney. The filing lists prior sales of 3,000 shares on 05/01/2026 ($4,638,874.80), 3,000 shares on 04/01/2026 ($3,343,033.50), and 3,000 shares on 03/02/2026 ($3,349,516.50).
Monolithic Power Systems' EVP & General Counsel, Saria Tseng, reported an open-market sale of company stock. On May 27, 2026, she sold 7,565 shares of Common Stock at a price of $1,700 per share, and now holds 144,218 shares directly.
The filing also shows an indirect holding of 1,000 shares attributed to the C&T Discovery Foundation, recorded as a holding entry rather than a new trade.
Monolithic Power Systems’ interim CFO Robert W. Dean II reported a small, tax-related share sale. On 2026-05-26, he sold 22 shares of common stock at a weighted average price of $1,649.56 per share to cover tax withholding obligations tied to vested restricted stock units. After this transaction, he directly held 5,878 common shares and indirectly held 65 additional shares through an account noted as held by parent and daughter. The filing indicates a routine tax-withholding event rather than a discretionary reduction of his ownership stake.