MPWR: Interim CFO Robert W. Dean II Sells Shares

What Happened
Robert W. Dean II, Interim Chief Financial Officer of Monolithic Power Systems (MPWR), reported two transactions on 2026-08-24. He sold 32 shares in an open-market sale at a weighted average price of $1,297.72 for total proceeds of approximately $41,527 (price range $1,296.07–$1,298.01). Separately, he transferred 5 shares with no proceeds (no funds exchanged) and, after the transfer, retained no pecuniary interest in those 5 shares.

Key Details

• Transaction date: 2026-08-24; Form 4 filed 2026-08-26 (filed within the standard two-business-day window).
• Sale: 32 shares, weighted average price $1,297.72, total ≈ $41,527; prices reported ranged $1,296.07–$1,298.01.
• Transfer: 5 shares, $0.00 proceeds — a transfer to a non-household individual; no sale occurred.
• Shares owned after transaction: Not specified in the filing.
• Footnotes: F1 — sale to cover tax withholding on vested restricted stock units (RSUs). F2 — weighted-average price and price range; reporter will provide per-price breakdown on request. F3 — transfer of 5 shares to a non-immediate-family individual with no pecuniary interest retained.
• Transaction codes: S = sale; J = other acquisition/disposition (transfer); F = tax withholding related.

Context
The sale was reported as a tax-withholding sale tied to RSU vesting — a common, routine insider transaction that typically reflects tax obligations rather than a directional bet on the stock. The 5-share transfer was a no-money transfer (not a market sale) and therefore should not be read as a market-driven disposition. Purchases generally carry stronger signals about insider sentiment than routine withholding sales or transfers.