X0306 4 2022-09-08 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 2022-09-08 4 S 0 41138 32.32 D 7112461 I Held by Fourth Avenue FF Opportunities LP - Series E Class A Common Stock 2022-09-08 4 S 0 6736 32.32 D 1164702 I Held by QVT Family Office Onshore LP Class A Common Stock 2022-09-08 4 S 0 33335 32.32 D 5763123 I Held by Saratoga Park Ltd Class A Common Stock 2022-09-08 4 S 0 33295 31.70 D 7079166 I Held by Fourth Avenue FF Opportunities LP - Series E Class A Common Stock 2022-09-08 4 S 0 5452 31.70 D 1159250 I Held by QVT Family Office Onshore LP Class A Common Stock 2022-09-08 4 S 0 26979 31.70 D 5736144 I Held by Saratoga Park Ltd Class A Common Stock 2022-09-09 4 S 0 85505 33.44 D 6993661 I Held by Fourth Avenue FF Opportunities LP - Series E Class A Common Stock 2022-09-09 4 S 0 14002 33.44 D 1145248 I Held by QVT Family Office Onshore LP Class A Common Stock 2022-09-09 4 S 0 69284 33.44 D 5666860 I Held by Saratoga Park Ltd Class A Common Stock 2022-09-12 4 S 0 76235 33.20 D 6917426 I Held by Fourth Avenue FF Opportunities LP - Series E Class A Common Stock 2022-09-12 4 S 0 12483 33.20 D 1132765 I Held by QVT Family Office Onshore LP Class A Common Stock 2022-09-12 4 S 0 61771 33.20 D 5605089 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 13,655,280 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 2022-09-12