SEC Form 4 reporting owner

Rosenthal Michael Stuart

Rosenthal Michael Stuart has filed 6 Form 4 transactions reported between January 12, 2026 and June 9, 2026, as Chief Operating Officer of MP Materials Corp. / DE.

Name as filed: Rosenthal Michael Stuart

Open-market buys, 24 mo

$1.5M

2 lines

Open-market sales, 24 mo

None

reported

Companies

with Form 4 filings

Latest transaction

Jun 9, 2026

transaction date

Roles and reported holdings

MPMP Materials Corp. / DE
Jan 12, 2026 – Jun 9, 2026
Chief Operating Officer
Held directly1,333,673 sh as of May 20, 2026 · Form 4
Held indirectly (latest line)136,622 sh as of Jun 9, 2026 · Form 4
24 months: $1.5M bought

Transaction history

All 6 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

Date	Company	Type	Shares	Price	Value	Owned after	Filing
Jun 9, 2026	MPChief Operating Officer	Open-market purchaseCode P · indirect	10,000	$54.30	$543K@ $54.30	136,622	Form 4
May 20, 2026	MPChief Operating Officer	Open-market purchaseCode P · direct	17,000	$56.62	$963K@ $56.62	1,333,673	Form 4
Jan 13, 2026	MPChief Operating Officer	Shares withheld for tax or exercise priceCode F · direct	9,083	$63.82	$580K@ $63.82	1,316,673	Form 4
Jan 12, 2026	MPChief Operating Officer	Shares withheld for tax or exercise priceCode F · direct	10,619	$65.34	$694K@ $65.34	1,325,756	Form 4
Jan 12, 2026	MPChief Operating Officer	Grant or awardCode A · direct	33,648	—	—	1,336,375	Form 4
Jan 12, 2026	MPChief Operating Officer	Grant or awardCode A · direct	18,318	—	—	1,302,727	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.