DEAN ROBERT W II 4

What Happened

• Robert W. Dean II, Interim Chief Financial Officer of Monolithic Power Systems (MPWR), sold 4 shares on May 18, 2026.
• Sale price was $1,563.28 per share, for total proceeds of approximately $6,253.
• This was a sale (not a purchase) and appears to be a routine tax-withholding sale related to vested restricted stock units rather than a directional bet on the stock.

Key Details

• Transaction date: 2026-05-18; Filing (Form 4) date: 2026-05-20 (appears timely).
• Transaction type: Sale (open-market or private sale reported as “S”).
• Price per share: $1,563.28; Total value: ~$6,253.
• Footnote: Reported sale was to cover tax withholding obligations upon the vesting of restricted stock units (F1).
• Shares owned after the transaction: not specified in the provided filing.

Context

• Sales to cover tax withholding on RSU vesting are common and typically routine; they do not necessarily signal the insider’s view on the company’s future performance.
• The size of this transaction is small relative to typical executive trades, suggesting a tax-related disposition rather than a material reallocation of holdings.