Welcome to our dedicated page for MONOLITHIC POWER SYSTEMS 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.
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.
Monolithic Power Systems director Victor K. Lee reported an equity award from the company. On February 3, 2026, he acquired 189 shares of common stock at $0.00 per share in connection with the Board-approved annual restricted stock unit grant to each independent director.
The footnote explains that this RSU grant will vest one year after the grant date, as long as the director continues to serve the company. After this grant, Lee beneficially owned 28,156 shares of Monolithic Power Systems common stock in total, held directly.
Monolithic Power Systems director Carintia Martinez reported an annual equity award in the form of restricted stock units. On February 3, 2026, she acquired 189 shares of common stock at $0 per share, bringing her directly held beneficial ownership to 1,067 shares.
The grant was part of the company’s regular annual restricted stock unit program for independent directors. According to the disclosure, this RSU award will vest one year after the grant date, provided she continues serving on the board during that period.
Monolithic Power Systems executive Deming Xiao reported a stock award tied to prior performance-based incentives. As EVP, Global Operations, he received 57,170 shares of common stock on February 3, 2026 at $0 per share, following the certification of performance-based restricted stock units granted in 2023. After this vesting, he beneficially owns 258,807 shares directly, plus 20,455 shares held indirectly by his spouse and 4,336 shares held indirectly through the Christopher Chao Xiao Trust.
Monolithic Power Systems EVP and CFO Theodore Blegen received 38,745 shares of common stock on February 3, 2026 through the vesting of previously granted performance-based restricted stock units. These shares were awarded at a price of $0 per share following certification of performance goals for a three-year period that began with a February 7, 2023 grant.
After this award, Blegen directly beneficially owned 104,078 shares of Monolithic Power Systems common stock. He also indirectly beneficially owned 5,331 shares held in an irrevocable trust for Sarah N. Blegen and another 5,331 shares held in an irrevocable trust for Theodore F. Blegen.
Monolithic Power Systems EVP & General Counsel Saria Tseng received 57,170 common shares on February 3, 2026 from previously granted performance-based restricted stock units. The company’s Compensation Committee certified that three-year performance goals were achieved, causing all units to fully vest and be released the same day at a price of $0 per share.
After this award, Tseng directly beneficially owned 223,501 shares of Monolithic Power Systems common stock and indirectly held 1,000 additional shares through C&T Discovery Foundation.
Monolithic Power Systems CEO Michael Hsing, who is also a director, reported the vesting of 136,825 shares of common stock on February 3, 2026. These shares came from performance-based restricted stock units granted on February 7, 2023 after a three-year performance period and were awarded at a price of $0 per share, subject to tax withholding.
After this award, Hsing directly beneficially owned 1,043,157 shares of common stock. In addition, indirect holdings totaled 133,040 shares through the M Hsing 04 Trust and 12,825 shares through the ZH Family 2020 Trust.
Monolithic Power Systems executive Maurice Sciammas reported a stock award tied to prior performance-based units. As EVP, WW Sales & Marketing, he received 57,170 shares of common stock on February 3, 2026, at a price of $0 after the company’s Compensation Committee certified performance goals for PSUs granted on February 7, 2023.
All 57,170 shares fully vested and were released the same day, bringing his directly held common stock to 201,500 shares. Additional indirect holdings are reported in various family trusts and accounts.
Monolithic Power Systems announced leadership changes, a higher dividend, and the release of its latest quarterly and annual results. The company’s Board approved an increase in the quarterly cash dividend from $1.56 per share to $2.00 per share, with the first $2.00 dividend payable on April 15, 2026 to stockholders of record on March 31, 2026.
The company’s Executive Vice President and Chief Financial Officer, T. Bernie Blegen, plans to retire after the issuance of the 2025 annual report on Form 10-K and will remain to assist with a smooth transition. The Board appointed Rob Dean, currently Corporate Controller, as interim Chief Financial Officer effective on that date.
The company also released a press release and detailed earnings commentary covering financial results for the quarter and year ended December 31, 2025, along with a separate press release discussing the CFO transition.
FMR LLC has filed an amended Schedule 13G reporting a significant ownership stake in Monolithic Power Systems, Inc. common stock. As of December 31, 2025, FMR LLC and related entities beneficially own 3,977,007.87 shares, representing 8.3% of the company’s outstanding common stock.
FMR LLC has sole voting power over 3,736,527.22 shares and sole dispositive power over 3,977,007.87 shares. Abigail P. Johnson is reported with sole dispositive power over the same 3,977,007.87 shares, but no voting power. The filing states the shares are held in the ordinary course of business and not for the purpose of changing or influencing control, and that various underlying clients have rights to dividends or sale proceeds, with no single client holding more than five percent.
An affiliated seller has filed a notice of proposed sale under Rule 144 to dispose of 51,841 shares of common stock through Morgan Stanley Smith Barney, with an indicated aggregate market value of $60,385,952.03. The planned sale is listed for execution on February 4, 2026 on the NASDAQ exchange.
The shares to be sold were acquired on February 3, 2026 as performance-based restricted stock units from the issuer. The filing also reports that Michael Hsing sold 40,000 and 30,000 shares of common stock in two prior transactions on November 11 and 12, 2025, for gross proceeds of $38,335,600.00 and $28,958,700.00, respectively.