X0508 4 2024-01-12 0 0001801368 MP Materials Corp. / DE MP 0001831686 Corbett Ryan 1700 S. PAVILION CENTER DRIVE, SUITE 800 LAS VEGAS NV 89135 0 1 0 0 Chief Financial Officer 0 Common Stock 2024-01-12 4 A 0 74347 0.00 A 375310 D 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. Includes 75,082 shares of Common Stock acquired in a pro rata distribution in-kind, the acquisition of which was exempt pursuant to Rule 16a-9. /s/ Elliot D. Hoops, Attorney-In-Fact for Ryan Crobett 2024-01-16