Ryan Corbett - 17 Mar 2026 Form 4 Insider Report for MP Materials Corp. / DE (MP)

Role: Chief Financial Officer
Signature: /s/ Elliot D. Hoops, Attorney-In-Fact for Ryan Corbett
Issuer symbol: MP
Transactions as of: 17 Mar 2026
Net transactions value: -$2,760,000
Form type: 4
Filing time: 17 Mar 2026, 20:18:58 UTC
Previous filing: 14 Jan 2026
SEC: View on sec.gov

Quoteable Key Fact

"Ryan Corbett filed Form 4 for MP Materials Corp. / DE (MP) on 17 Mar 2026."

Quick Takeaways

This page summarizes Ryan Corbett's Form 4 filing for MP Materials Corp. / DE (MP).
1 reported transaction and 0 derivative rows are listed below.
Filing timestamp: 17 Mar 2026, 20:18.

What Changed

Previous filing in this sequence was filed on 14 Jan 2026.
Current net transaction value: -$2,760,000.

Why This Matters

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Official SEC Source

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

See Original Filing

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Corbett Ryan	Chief Financial Officer	1700 S. PAVILION CENTER DRIVE, SUITE 800, LAS VEGAS	/s/ Elliot D. Hoops, Attorney-In-Fact for Ryan Corbett	17 Mar 2026	0001831686

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MP	Common Stock	Sale	$2,760,000	-46,000	-26%	$60.00	129,017	17 Mar 2026	Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

Transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).

Explanation of Responses:

Id	Content
F1	The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 16, 2025.
F2	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $60.00 to $60.06. The reporting person undertakes to provide to MP Materials Corp., any security holder of MP Materials Corp., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (2) to this Form 4.

Content

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 16, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $60.00 to $60.06. The reporting person undertakes to provide to MP Materials Corp., any security holder of MP Materials Corp., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (2) to this Form 4.