Tseng Saria 4

What Happened

• Saria Tseng, EVP & General Counsel of Monolithic Power Systems (MPWR), was awarded 57,170 shares on February 3, 2026. The Form 4 reports the shares as acquired at $0.00 because they were issued upon vesting of performance-based restricted stock units (PSUs). The award vested and the shares were released to her on the same date, subject to tax withholding.

Key Details

• Transaction date: February 3, 2026; Form 4 filed February 5, 2026 (within the typical two-business-day reporting window).
• Transaction type/code: A = Award/Grant (PSU vesting). Price reported: $0.00 (award/transfer upon vesting).
• Shares awarded: 57,170; reported value on the Form 4 is $0 due to award reporting; market value not provided in the filing.
• Tax withholding: Shares were subject to tax withholding per the grant agreement (footnote F1).
• Shares owned after the transaction: not specified in the provided filing details.
• Footnote summary: PSUs were originally granted on Feb 7, 2023, subject to a three-year performance period; the Compensation Committee certified achievement of the performance criteria, triggering vesting and release on Feb 3, 2026.

Context

• This was a compensation-related vesting of performance RSUs, not an open-market purchase or sale. Such awards reflect achievement of pre-set performance goals and are routine elements of executive compensation rather than direct buy/sell decisions. Tax withholding reduces the net shares delivered to the insider.