13F Pro

SEC Form 4 reporting owner

Hsing Michael

Hsing Michael has filed 46 Form 4 transactions reported between December 9, 2025 and May 18, 2026, as CEO of MONOLITHIC POWER SYSTEMS, INC..

Name as filed: Hsing Michael

Open-market buys, 24 mo
None
reported
Open-market sales, 24 mo
$238.6M
44 lines
Companies
1
with Form 4 filings
Latest transaction
May 18, 2026
transaction date

Roles and reported holdings

  • MPWRMONOLITHIC POWER SYSTEMS, INC.
    Dec 9, 2025 – May 18, 2026

    CEO

    Held directly848,263 sh as of May 18, 2026 · Form 4

    24 months: $238.6M sold

Transaction history

All 46 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

DateCompanyTypeSharesValueFiling
May 18, 2026MPWRCEOOpen-market saleCode S · direct130$198K@ $1521.43Form 4
May 18, 2026MPWRCEOOpen-market saleCode S · direct352$534K@ $1518.15Form 4
May 18, 2026MPWRCEOOpen-market saleCode S · direct551$834K@ $1513.11Form 4
May 18, 2026MPWRCEOOpen-market saleCode S · direct3,769$5.7M@ $1507.70Form 4
May 18, 2026MPWRCEOOpen-market saleCode S · direct2,929$4.4M@ $1503.05Form 4
May 18, 2026MPWRCEOOpen-market saleCode S · direct608$912K@ $1499.46Form 4
May 18, 2026MPWRCEOOpen-market saleCode S · direct862$1.3M@ $1491.48Form 4
May 18, 2026MPWRCEOOpen-market saleCode S · direct6,688$9.9M@ $1486.76Form 4
May 18, 2026MPWRCEOOpen-market saleCode S · direct5,737$8.5M@ $1482.51Form 4
May 18, 2026MPWRCEOOpen-market saleCode S · direct4,082$6.0M@ $1476.96Form 4
May 18, 2026MPWRCEOOpen-market saleCode S · direct5,049$7.4M@ $1472.84Form 4
May 18, 2026MPWRCEOOpen-market saleCode S · direct5,819$8.5M@ $1467.62Form 4
May 18, 2026MPWRCEOOpen-market saleCode S · direct3,424$5.0M@ $1462.61Form 4
Feb 12, 2026MPWRCEOOpen-market saleCode S · direct1,240$1.5M@ $1210.11Form 4
Feb 12, 2026MPWRCEOOpen-market saleCode S · direct3,640$4.4M@ $1205.82Form 4
Feb 12, 2026MPWRCEOOpen-market saleCode S · direct1,440$1.7M@ $1200.81Form 4
Feb 12, 2026MPWRCEOOpen-market saleCode S · direct600$717K@ $1194.34Form 4
Feb 12, 2026MPWRCEOOpen-market saleCode S · direct160$190K@ $1188.23Form 4
Feb 12, 2026MPWRCEOOpen-market saleCode S · direct480$567K@ $1180.79Form 4
Feb 12, 2026MPWRCEOOpen-market saleCode S · direct200$235K@ $1173.39Form 4
Feb 12, 2026MPWRCEOOpen-market saleCode S · direct2,076$2.4M@ $1168.80Form 4
Feb 12, 2026MPWRCEOOpen-market saleCode S · direct4,001$4.7M@ $1164.92Form 4
Feb 12, 2026MPWRCEOOpen-market saleCode S · direct4,992$5.8M@ $1159.84Form 4
Feb 12, 2026MPWRCEOOpen-market saleCode S · direct12,731$14.7M@ $1155.71Form 4
Feb 11, 2026MPWRCEOOpen-market saleCode S · direct649$780K@ $1202.28Form 4
Feb 11, 2026MPWRCEOOpen-market saleCode S · direct14,578$17.5M@ $1197.20Form 4
Feb 11, 2026MPWRCEOOpen-market saleCode S · direct6,079$7.3M@ $1192.67Form 4
Feb 11, 2026MPWRCEOOpen-market saleCode S · direct2,104$2.5M@ $1188.17Form 4
Feb 11, 2026MPWRCEOOpen-market saleCode S · direct1,542$1.8M@ $1182.82Form 4
Feb 11, 2026MPWRCEOOpen-market saleCode S · direct2,799$3.3M@ $1177.67Form 4
Feb 11, 2026MPWRCEOOpen-market saleCode S · direct1,987$2.3M@ $1172.92Form 4
Feb 11, 2026MPWRCEOOpen-market saleCode S · direct1,533$1.8M@ $1167.62Form 4
Feb 11, 2026MPWRCEOOpen-market saleCode S · direct1,366$1.6M@ $1163.71Form 4
Feb 11, 2026MPWRCEOOpen-market saleCode S · direct363$421K@ $1158.71Form 4
Feb 10, 2026MPWRCEOOpen-market saleCode S · direct280$335K@ $1197.26Form 4
Feb 10, 2026MPWRCEOOpen-market saleCode S · direct880$1.0M@ $1176.04Form 4
Feb 10, 2026MPWRCEOOpen-market saleCode S · direct360$418K@ $1161.41Form 4
Feb 10, 2026MPWRCEOOpen-market saleCode S · direct694$802K@ $1154.96Form 4
Feb 10, 2026MPWRCEOOpen-market saleCode S · direct1,215$1.4M@ $1151.11Form 4
Feb 10, 2026MPWRCEOOpen-market saleCode S · direct3,864$4.4M@ $1145.90Form 4
Feb 10, 2026MPWRCEOOpen-market saleCode S · direct16,080$18.4M@ $1141.88Form 4
Feb 10, 2026MPWRCEOOpen-market saleCode S · direct6,325$7.2M@ $1136.75Form 4
Feb 10, 2026MPWRCEOOpen-market saleCode S · direct4,302$4.9M@ $1132.01Form 4
Feb 6, 2026MPWRCEOOpen-market saleCode S · direct54,923$64.3M@ $1171.16Form 4
Feb 3, 2026MPWRCEOGrant or awardCode A · direct136,825—Form 4
Dec 9, 2025MPWRCEOGiftCode G · direct12,337—Form 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.