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.
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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.
Shareholder Bernie Blegen filed a Rule 144 notice to sell 20,730 shares of common stock through Morgan Stanley Smith Barney LLC around February 4, 2026 on NASDAQ, with an aggregate market value of $24,146,925.90 and 48,710,953 shares outstanding.
The 20,730 shares were acquired on February 3, 2026 as performance-based restricted stock units from the issuer. Over the past three months, Blegen sold three blocks of 3,000 common shares each, with gross proceeds between $2,724,630.00 and $3,389,280.00.
Monolithic Power Systems insider Maurice Sciammas has filed a notice of intent to sell common stock under SEC Rule 144. The filing covers 21,590 shares of common stock, with an aggregate market value of 25,148,679.70, to be sold through Morgan Stanley Smith Barney LLC on NASDAQ.
The 21,590 shares were acquired on 02/03/2026 as performance-based restricted stock units from the issuer. As context, the filing lists 48,710,953 shares of common stock outstanding and notes prior sales by Sciammas in the last three months totaling 38,976 shares of common stock for gross proceeds of 34,337,784.48.
This Form 144 notice relates to a planned sale of up to 21,590 shares of common stock through Morgan Stanley Smith Barney LLC on the NASDAQ, with an indicated aggregate market value of $25,148,679.70. The issuer has 48,710,953 shares outstanding.
The seller, Saria Tseng, acquired these 21,590 shares on February 3, 2026 as performance-based restricted stock units from the issuer. Over the prior three months, the filing lists additional sales by Saria Tseng totaling 40,000 shares of common stock on November 25 and 26, 2025, with gross proceeds of $18,083,600.00 and $18,529,300.00, respectively.
A holder of MPWR common stock filed a notice of proposed sale of 21,590 shares under Rule 144. These shares have an aggregate market value of $25,148,679.70 and are to be sold through Morgan Stanley Smith Barney LLC on 02/04/2026 on the NASDAQ market.
The issuer had 48,710,953 shares of this class outstanding. The seller acquired the 21,590 shares on 02/03/2026 as performance-based restricted stock units from the issuer, with no separate cash payment noted.
Monolithic Power Systems executive vice president and CFO Theodore Blegen reported multiple open‑market sales of common stock on February 2, 2026 under a pre‑arranged Rule 10b5‑1 trading plan. The trades involved small blocks of shares at weighted average prices ranging roughly from $1,110.14 to $1,139.54 per share. After these transactions, Blegen directly beneficially owned 65,333 common shares and indirectly held 5,331 shares in each of two irrevocable trusts for Sarah N. Blegen and Theodore F. Blegen.