X0306 4 2021-03-15 0001801368 MP Materials Corp. / DE MP 0001831686 Corbett Ryan 6720 VIA AUSTI PARKWAY, SUITE 450 LAS VEGAS NV 89119 true Chief Financial Officer Class A Common Stock 2021-03-15 4 A 0 1154 0 A 282071 D Class A Common Stock 2021-03-15 4 A 0 1154 0 A 283225 D Class A Common Stock 2021-03-15 4 F 0 343 45.98 D 282882 D These shares of restricted Class A Common Stock are scheduled to vest in 25% annual increments on each anniversary of the grant date, subject to reporting person's continued employment through the applicable vesting date. /s/ Ryan Corbett 2021-03-17