X0306 4 2022-08-22 0 0001801368 MP Materials Corp. / DE MP 0001290162 QVT Financial LP 888 SEVENTH AVENUE, 43RD FLOOR NEW YORK NY 10106 1 0 0 1 Director by Deputization Class A Common Stock 2022-08-22 4 S 0 11955 34.43 D 7868208 I Held by Fourth Avenue FF Opportunities LP - Series E Class A Common Stock 2022-08-22 4 S 0 1960 34.43 D 1288458 I Held by QVT Family Office Onshore LP Class A Common Stock 2022-08-22 4 S 0 9685 34.43 D 6375503 I Held by Saratoga Park Ltd Class A Common Stock 2022-08-23 4 S 0 103732 35.71 D 7764476 I Held by Fourth Avenue FF Opportunities LP - Series E Class A Common Stock 2022-08-23 4 S 0 16986 35.71 D 1271472 I Held by QVT Family Office Onshore LP Class A Common Stock 2022-08-23 4 S 0 84053 35.71 D 6291450 I Held by Saratoga Park Ltd Class A Common Stock 2022-08-24 4 S 0 10957 36.17 D 7753519 I Held by Fourth Avenue FF Opportunities LP - Series E Class A Common Stock 2022-08-24 4 S 0 1794 36.17 D 1269678 I Held by QVT Family Office Onshore LP Class A Common Stock 2022-08-24 4 S 0 8878 36.17 D 6282572 I Held by Saratoga Park Ltd Class A Common Stock 2022-08-24 4 S 0 82370 36.80 D 7671149 I Held by Fourth Avenue FF Opportunities LP - Series E Class A Common Stock 2022-08-24 4 S 0 13489 36.80 D 1256189 I Held by QVT Family Office Onshore LP Class A Common Stock 2022-08-24 4 S 0 66743 36.80 D 6215829 I Held by Saratoga Park Ltd QVT Financial LP and its general partner, QVT Financial GP LLC (together, "QVT"), may be deemed to have beneficial ownership over the 15,143,167 Common Shares held by Saratoga Park Ltd., QVT Family Office Onshore LP and Fourth Avenue FF Opportunities LP - Series E. The filing of this statement shall not be deemed an admission that QVT is the beneficial owner of the securities reported herein for purposes of Section 16 of the Securities Act of 1934, as amended, or otherwise. QVT expressly disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein. Fourth Avenue Capital Partners GP LLC is the general partner of Fourth Avenue FF Opportunities LP - Series E and may also be deemed to have beneficial ownership over the Common Shares held by Fourth Avenue FF Opportunities LP - Series E. /s/ Meg Eisner 2022-08-24