Hsing Michael 4

What Happened
Michael Hsing, CEO and a director of Monolithic Power Systems (MPWR), sold a total of 40,000 shares in a series of open-market transactions on May 18, 2026. The individual trades ranged in price roughly from $1,460 to $1,521 per share, generating aggregate proceeds of approximately $59.31 million. These were sales (code S) — not purchases or option exercises.

Key Details

• Transaction date: May 18, 2026; Form 4 filed May 20, 2026 (filed within the normal two-business-day window).
• Total shares sold: 40,000; Total proceeds: ~$59,310,170.
• Price range across the trades: approximately $1,459.96 to $1,521.56 per share (footnotes give weighted-average price ranges for the individual reported lines).
• Shares owned after transaction: not specified in the provided lines; footnote F1 notes the ending balance includes 29 shares acquired Feb 17, 2026 via the company ESPP.
• Notes/footnotes: Multiple footnotes (F2–F14) indicate the reported line prices are weighted averages and that the filer can provide the exact number of shares sold at each separate price upon request.

Context

• These were open-market sales (routine dispositions) rather than purchases or option exercises; such sales frequently reflect liquidity or diversification decisions rather than direct commentary on company fundamentals.
• No indication in the filing of gifts, exercises, or tax-withholding shares; all reported items are sales (S).
• Filing appears timely (not marked late).