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.
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.
Maurice Sciammas filed a Rule 144 notice to sell 1286 shares of MPWR common stock through Morgan Stanley Smith Barney LLC on NASDAQ, with an approximate sale date of 02/06/2026. The filing notes 48710953 shares of common stock outstanding.
The 1286 shares to be sold were acquired on 02/03/2026 as performance-based restricted stock units from the issuer, with payment also dated 02/03/2026. Over the past three months, Sciammas previously sold 35000, 3976, and 21590 common shares on 11/19/2025, 11/24/2025, and 02/04/2026 for gross proceeds of 30777350.00, 3559434.48, and 25285344.00.
Monolithic Power Systems director Eileen Wynne reported receiving an annual equity award in the form of restricted stock units. On February 3, 2026, she was granted 189 shares of common stock at a price of $0 per share, as part of the independent directors’ annual RSU grant program.
The RSU grant will vest one year after the grant date, conditioned on her continued service with the company. Following this award, she beneficially owned 1,342 shares of Monolithic Power Systems common stock in direct form.
Monolithic Power Systems director Eileen Wynne reported receiving an annual equity award in the form of restricted stock units. On February 3, 2026, she was granted 189 shares of common stock at a price of $0 per share, as part of the independent directors’ annual RSU grant program.
The RSU grant will vest one year after the grant date, conditioned on her continued service with the company. Following this award, she beneficially owned 1,342 shares of Monolithic Power Systems common stock in direct form.
Monolithic Power Systems director Eileen Wynne reported receiving an annual equity award in the form of restricted stock units. On February 3, 2026, she was granted 189 shares of common stock at a price of $0 per share, as part of the independent directors’ annual RSU grant program.
The RSU grant will vest one year after the grant date, conditioned on her continued service with the company. Following this award, she beneficially owned 1,342 shares of Monolithic Power Systems common stock in direct form.
Monolithic Power Systems director Jeff Zhou received an equity grant of 189 shares of common stock on February 3, 2026. These shares were awarded at a price of $0 per share as part of the company’s annual restricted stock unit grant to each independent director.
The RSU grant will vest one year after the grant date, conditioned on Mr. Zhou’s continued service with the company. Following this grant, he beneficially owns 5,800 shares of Monolithic Power Systems common stock in direct ownership.
Monolithic Power Systems director Jeff Zhou received an equity grant of 189 shares of common stock on February 3, 2026. These shares were awarded at a price of $0 per share as part of the company’s annual restricted stock unit grant to each independent director.
The RSU grant will vest one year after the grant date, conditioned on Mr. Zhou’s continued service with the company. Following this grant, he beneficially owns 5,800 shares of Monolithic Power Systems common stock in direct ownership.
Monolithic Power Systems director Jeff Zhou received an equity grant of 189 shares of common stock on February 3, 2026. These shares were awarded at a price of $0 per share as part of the company’s annual restricted stock unit grant to each independent director.
The RSU grant will vest one year after the grant date, conditioned on Mr. Zhou’s continued service with the company. Following this grant, he beneficially owns 5,800 shares of Monolithic Power Systems common stock in direct ownership.
Monolithic Power Systems director Herbert Kuo Wei Chang received an annual equity award in the form of restricted stock units. On February 3, 2026, he was granted 189 shares of common stock at a price of $0 per share, bringing his directly held total to 615 shares.
The award represents the company’s routine annual restricted stock unit grant to each independent director. These RSUs will vest one year after the grant date, as long as Chang continues to serve on the Board of Directors during that period.
Monolithic Power Systems director Herbert Kuo Wei Chang received an annual equity award in the form of restricted stock units. On February 3, 2026, he was granted 189 shares of common stock at a price of $0 per share, bringing his directly held total to 615 shares.
The award represents the company’s routine annual restricted stock unit grant to each independent director. These RSUs will vest one year after the grant date, as long as Chang continues to serve on the Board of Directors during that period.
Monolithic Power Systems director Herbert Kuo Wei Chang received an annual equity award in the form of restricted stock units. On February 3, 2026, he was granted 189 shares of common stock at a price of $0 per share, bringing his directly held total to 615 shares.
The award represents the company’s routine annual restricted stock unit grant to each independent director. These RSUs will vest one year after the grant date, as long as Chang continues to serve on the Board of Directors during that period.
Monolithic Power Systems director Eugen J. Elmiger reported an equity award from the company. On February 3, 2026, he acquired 189 shares of common stock at a stated price of $0, reflecting an annual restricted stock unit grant to each independent director.
After this grant, Elmiger directly owned 17,402 shares of Monolithic Power Systems common stock. The RSU grant will vest one year after the grant date, provided he continues to serve the company as an independent director.
Monolithic Power Systems director Eugen J. Elmiger reported an equity award from the company. On February 3, 2026, he acquired 189 shares of common stock at a stated price of $0, reflecting an annual restricted stock unit grant to each independent director.
After this grant, Elmiger directly owned 17,402 shares of Monolithic Power Systems common stock. The RSU grant will vest one year after the grant date, provided he continues to serve the company as an independent director.
Monolithic Power Systems director Eugen J. Elmiger reported an equity award from the company. On February 3, 2026, he acquired 189 shares of common stock at a stated price of $0, reflecting an annual restricted stock unit grant to each independent director.
After this grant, Elmiger directly owned 17,402 shares of Monolithic Power Systems common stock. The RSU grant will vest one year after the grant date, provided he continues to serve the company as an independent director.
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 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 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 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 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 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 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 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 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 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 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.