Xiao Deming 4
4 · MONOLITHIC POWER SYSTEMS INC · Filed May 8, 2026
Research Summary
AI-generated summary of this filing
Monolithic Power Systems (MPWR) EVP Xiao Deming Sells Shares
What Happened
- Xiao Deming, EVP, Global Operations at Monolithic Power Systems (MPWR), sold a total of 30,000 shares in multiple open-market transactions on May 6, 2026. The four reported disposals were: 3,329 shares at $1,648.38 ($5,487,457), 14,167 shares at $1,652.80 ($23,415,218), 11,597 shares at $1,657.93 ($19,227,014), and 907 shares at $1,661.38 ($1,506,872). Aggregate proceeds were about $49.64 million. These were sales (S) — routine disposition rather than a purchase signal.
Key Details
- Transaction date: May 6, 2026; Form 4 filed May 8, 2026 (filed timely within the typical 2‑business‑day window).
- Prices: weighted-average prices reported per line were $1,648.38, $1,652.80, $1,657.93 and $1,661.38 (overall average ≈ $1,654.55). Footnotes (F2–F5) show price ranges for the separate trades and state the filer will provide a full breakdown on request.
- Shares owned after transaction: not specified in the provided excerpt. Footnote F1 notes the ending balance includes 27 shares acquired Feb 17, 2026 via the company’s qualified ESPP.
- Transaction type/code: Open-market sales (code S). No 10b5-1 plan, tax-withholding, or late-filing flag is indicated in the supplied data.
Context
- Sales by officers can be routine (diversification, tax planning, liquidity) and do not by themselves indicate company outlook; purchases are typically viewed as a stronger bullish signal. If you need the per-trade price breakdown (the footnotes indicate varying prices within each reported line), the filer made a statement agreeing to provide that detail upon request to the SEC staff, the issuer, or a security holder.
Insider Transaction Report
Form 4
Xiao Deming
EVP, Global Operations
Transactions
- Sale
Common Stock
[F2][F1]2026-05-06$1648.38/sh−3,329$5,487,457→ 232,630 total - Sale
Common Stock
[F3]2026-05-06$1652.80/sh−14,167$23,415,218→ 218,463 total - Sale
Common Stock
[F4]2026-05-06$1657.93/sh−11,597$19,227,014→ 206,866 total - Sale
Common Stock
[F5]2026-05-06$1661.38/sh−907$1,506,872→ 205,959 total
Holdings
- 20,455(indirect: By Spouse)
Common Stock
- 4,336(indirect: By Trust)
Common Stock
Footnotes (5)
- [F1]Ending balance includes 27 shares acquired on February 17, 2026 through the Company's qualified ESPP program.
- [F2]The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,645.48 to $1,650.43. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.
- [F3]The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,650.75 to $1,655.75. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.
- [F4]The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,655.80 to $1,660.72. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.
- [F5]The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,660.99 to $1,662 The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.
Signature
/s/ Saria Tseng, attorney-in-fact for Mr. Deming Xiao|2026-05-08