Michael Stuart Rosenthal - 12 Jan 2026 Form 4 Insider Report for MP Materials Corp. / DE (MP)

Role: Chief Operating Officer
Signature: /s/ Elliot D. Hoops, Attorney-In-Fact for Michael Rosenthal
Issuer symbol: MP
Transactions as of: 12 Jan 2026
Net transactions value: -$1,273,523
Form type: 4
Filing time: 14 Jan 2026, 19:39:37 UTC
Previous filing: 29 Aug 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Rosenthal Michael Stuart	Chief Operating Officer	1700 S. PAVILION CENTER DRIVE, SUITE 800, LAS VEGAS	/s/ Elliot D. Hoops, Attorney-In-Fact for Michael Rosenthal	14 Jan 2026	0001832050

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MP	Common Stock	Award	$0	+18,318	+1.4%	$0.000000	1,302,727	12 Jan 2026	Direct	F1
transaction	MP	Common Stock	Award	$0	+33,648	+2.6%	$0.000000	1,336,375	12 Jan 2026	Direct	F2
transaction	MP	Common Stock	Tax liability	$693,845	-10,619	-0.79%	$65.34	1,325,756	12 Jan 2026	Direct	F3
transaction	MP	Common Stock	Tax liability	$579,677	-9,083	-0.69%	$63.82	1,316,673	13 Jan 2026	Direct	F4
holding	MP	Common Stock						126,622	12 Jan 2026	By Rosenthal Family Trust

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

Explanation of Responses:

Id	Content
F1	The securities reported are restricted stock units that vest in four annual installments beginning on the first anniversary of the grant date. Each restricted stock unit represents the contingent right to receive, upon vesting of the unit, one share of the issuer's common stock.
F2	Represents the number of shares of Common Stock received upon vesting of restricted stock units with performance conditions award previously granted to the reporting person on February 23, 2023. Under the terms of this award, the restricted stock units with performance conditions cliff vest upon the conclusion of the three-year performance period from 01/01/2023 through 12/31/2025 and the certification of the Company's achievement of the pre-established performance conditions based on the relative total shareholder return of the Company's share price compared to the S&P 400 Index and S&P 400 Materials Index.
F3	Represents shares withheld to satisfy tax withholding obligations applicable to the vesting of restricted stock units that vested on January 12, 2026.
F4	Represents shares withheld to satisfy tax withholding obligations applicable to the vesting of restricted stock units that vested on January 13, 2026.