Monolithic Power (MPWR) Interim CFO Robert W. Dean II Sells 22 Shares

What Happened

• Robert W. Dean II, Interim Chief Financial Officer of Monolithic Power Systems (MPWR), reported a sale of 22 shares on 2026-05-26. The weighted average sale price was $1,649.56, for total proceeds of approximately $36,290. This was a sale (not a purchase) and was reported as an open-market/private sale.

Key Details

• Transaction date: 2026-05-26; Filing date: 2026-05-28 (filed within the two-business-day Form 4 window).
• Price: weighted average $1,649.56; individual trade prices ranged $1,647.84–$1,650.16 (filing offers to provide per-price details on request).
• Reason: Footnote states the sale was to cover tax-withholding obligations upon vesting of restricted stock units (RSUs).
• Shares owned after the transaction: Not provided in the excerpt of the filing.
• Transaction code: S = Sale; footnotes F1 (tax withholding) and F2 (price range/weighted average).

Context

• This was a routine "sell to cover" tied to RSU vesting, a common administrative sale to satisfy tax obligations and not necessarily an indicator of the insider’s view on the company. Purchases tend to be more informative about insider conviction; this sale appears to be tax-related and relatively small in size.