Frank Anthony Balow III filed an initial statement of beneficial ownership with the SEC on October 29, 2026, disclosing his securities holdings upon becoming Chief Financial Officer of Monolithic Power Systems, Inc. (NASDAQ:MPWR), with an event date of October 27, 2026.

Key Highlights

  • New CFO: Frank Anthony Balow III is identified as Chief Financial Officer of Monolithic Power Systems, Inc.
  • Total beneficial ownership: Balow directly owns 2,941 shares of Common Stock, according to the filing.
  • RSU component: Of the 2,941 shares, 1,206 are restricted stock units subject to continued employment, vesting across 18 scheduled installments.
  • Vesting schedule spans multiple years: RSU installments range from 104 shares on November 22, 2026, through 8 shares on February 22, 2030, as disclosed in the filing.
  • No derivative securities: Table II of the filing lists no derivative securities beneficially owned by Balow.
  • Signed by attorney-in-fact: The form was signed by Saria Tseng as attorney-in-fact for Balow on October 29, 2026.

Balow's Initial Ownership Disclosure at Monolithic Power Systems

According to the filing, Frank Anthony Balow III submitted a Form 3 initial statement of beneficial ownership in connection with his role as Chief Financial Officer of Monolithic Power Systems, Inc. The event requiring the statement is dated October 27, 2026. Balow reported direct beneficial ownership of 2,941 shares of Common Stock in Table I of the filing.

The filing discloses that 1,206 of those shares are restricted stock units (RSUs) that vest "subject to continued employment" across 18 separate installments. The earliest vesting date listed is November 22, 2026, when 104 shares are scheduled to vest, and the final installment of 8 shares is set for February 22, 2030. Intermediate installments vary in size, ranging from 7 to 121 shares each, with quarterly and semi-annual vesting dates noted throughout 2027, 2028, and 2029.

No derivative securities, such as options, warrants, or convertible securities, are reported in Table II. The form was filed by one reporting person and was signed by Saria Tseng as attorney-in-fact for Balow on October 29, 2026. Balow's address is listed as 1555 Palm Beach Lakes Blvd., West Palm Beach, Florida 33401.

What Was Disclosed

Monolithic Power Systems' new CFO, Frank Anthony Balow III, disclosed initial beneficial ownership of 2,941 shares of Common Stock directly held, including 1,206 RSUs vesting over 18 installments through February 2030, with no derivative securities reported.