SEC Form 4 reporting owner

Lee Victor K

Lee Victor K has filed 9 Form 4 transactions reported between December 24, 2025 and February 9, 2026, as a reporting owner of MONOLITHIC POWER SYSTEMS, INC..

Name as filed: Lee Victor K

Open-market buys, 24 mo
None
reported
Open-market sales, 24 mo
$2.0M
8 lines
Companies
1
with Form 4 filings
Latest transaction
Feb 9, 2026
transaction date

Roles and reported holdings

  • MPWRMONOLITHIC POWER SYSTEMS, INC.
    Dec 24, 2025 – Feb 9, 2026

    Reporting owner

    Held directly27,756 sh as of Feb 9, 2026 · Form 4

    24 months: $2.0M sold

Transaction history

All 9 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

DateCompanyTypeSharesValueFiling
Feb 9, 2026MPWROpen-market saleCode S · direct400$485K@ $1212.16Form 4
Feb 3, 2026MPWRGrant or awardCode A · direct189—Form 4
Jan 2, 2026MPWROpen-market saleCode S · direct600$559K@ $930.86Form 4
Dec 24, 2025MPWROpen-market saleCode S · direct80$76K@ $955.08Form 4
Dec 24, 2025MPWROpen-market saleCode S · direct200$191K@ $953.70Form 4
Dec 24, 2025MPWROpen-market saleCode S · direct83$79K@ $952.37Form 4
Dec 24, 2025MPWROpen-market saleCode S · direct160$152K@ $951.60Form 4
Dec 24, 2025MPWROpen-market saleCode S · direct280$266K@ $950.64Form 4
Dec 24, 2025MPWROpen-market saleCode S · direct197$187K@ $949.70Form 4

How this page is built

Every row comes from a Form 4 filed with the SEC, which officers, directors and holders of more than 10% of a company’s stock must file within two business days of a trade. Transactions are grouped by the reporting owner’s name as filed (spacing, capitals and punctuation ignored); two different people filing under an identical name would appear together, and one person filing under two spellings appears on two pages.

Open-market totals count code P purchases and code S sales over the last 24 months. The same trade reported on more than one filing is counted once; when another owner (for example a fund and its general partner) reports the identical trade, they are listed beside it. Holdings are the shares owned after the latest purchase, sale, gift or tax-withholding line, shown separately for direct and indirect ownership; an indirect figure is one holding line, not a total across every trust or entity.

This page describes what was filed with the SEC; it is not investment advice or a recommendation to buy or sell any security.