SEC Form 4 reporting owner

Dean Robert W II

Dean Robert W II has filed 8 Form 4 transactions reported between May 13, 2026 and August 24, 2026, as Interim CFO of MONOLITHIC POWER SYSTEMS, INC..

Name as filed: DEAN ROBERT W II

Open-market buys, 24 mo

None

reported

Open-market sales, 24 mo

$234K

5 lines

Companies

with Form 4 filings

Latest transaction

Aug 24, 2026

transaction date

Roles and reported holdings

MPWRMONOLITHIC POWER SYSTEMS, INC.
May 13, 2026 – Aug 24, 2026
Interim CFO
Held directly7,094 sh as of Aug 24, 2026 · Form 4
24 months: $234K sold

Transaction history

All 8 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

Date	Company	Type	Shares	Price	Value	Owned after	Filing
Aug 24, 2026	MPWRInterim CFO	Other acquisition or dispositionCode J · direct	5	—	—	7,089	Form 4
Aug 24, 2026	MPWRInterim CFO	Open-market saleCode S · direct	32	$1297.72	$42K@ $1297.72	7,094	Form 4
Aug 17, 2026	MPWRInterim CFO	Open-market saleCode S · direct	6	$1413.64	$8K@ $1413.64	7,126	Form 4
Aug 5, 2026	MPWRInterim CFO	Open-market saleCode S · direct	105	$1344.27	$141K@ $1344.27	7,132	Form 4
Jul 25, 2026	MPWRInterim CFO	Grant or awardCode A · direct	1,359	—	—	7,237	Form 4
May 26, 2026	MPWRInterim CFO	Open-market saleCode S · direct	22	$1649.56	$36K@ $1649.56	5,878	Form 4
May 18, 2026	MPWRInterim CFO	Open-market saleCode S · direct	4	$1563.28	$6K@ $1563.28	5,900	Form 4
May 13, 2026	MPWRInterim CFO	Other acquisition or dispositionCode J · direct	2,156	—	—	5,904	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.