MP

SEC source: 0001209191-23-033120 · doc4.xml · nonDerivative · entry 1

Litinsky James H. · CIK 0001831746 · Director · Chairman and CEO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · Held by JHL Capital Group Holdings One LLC

Disclosed balance after: 647,832

F1 · kind: On May 26, 2023, JHL Capital Group Holdings One LLC made an in-kind distribution of shares of common stock on a pro rata basis, for no consideration.

F2 · ownership.direct: JHL Capital Group Master Fund L.P., a Cayman Islands limited partnership ("JHL Master Fund"), is the 100% owner of each of JHL Capital Group Holdings One LLC and JHL Capital Group Holdings Two LLC. JHL Capital Group Master Fund GP Ltd., a Cayman Islands exempted company ("JHL Master Fund GP"), is the general partner of JHL Master Fund. JHL Capital Group LLC, a Delaware limited liability company ("JHL Capital Group"), is the investment manager of JHL Master Fund, and is also the 100% owner of JHL Master Fund GP. JHL Capital Group L.P. and Mr. Litinsky may be deemed to beneficially own the shares of common stock held by JHL Capital Group LLC. James H. Litinsky holds a controlling interest in JHL Capital Group L.P. and serves as Chief Executive Officer of JHL Capital Group, as well as director of JHL Master Fund GP.

F3 · ownership.direct: Accordingly, JHL Master Fund, JHL Master Fund GP, JHL Capital Group, JHL Capital Group L.P. and Mr. Litinsky may be deemed to beneficially own issuer's common stock to be held directly by JHL Capital Group Holdings One LLC and JHL Capital Group Holdings Two LLC. Mr. Litinsky disclaims any beneficial ownership in the shares of common stock described in the prior sentence, other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

F2 · ownership.nature: JHL Capital Group Master Fund L.P., a Cayman Islands limited partnership ("JHL Master Fund"), is the 100% owner of each of JHL Capital Group Holdings One LLC and JHL Capital Group Holdings Two LLC. JHL Capital Group Master Fund GP Ltd., a Cayman Islands exempted company ("JHL Master Fund GP"), is the general partner of JHL Master Fund. JHL Capital Group LLC, a Delaware limited liability company ("JHL Capital Group"), is the investment manager of JHL Master Fund, and is also the 100% owner of JHL Master Fund GP. JHL Capital Group L.P. and Mr. Litinsky may be deemed to beneficially own the shares of common stock held by JHL Capital Group LLC. James H. Litinsky holds a controlling interest in JHL Capital Group L.P. and serves as Chief Executive Officer of JHL Capital Group, as well as director of JHL Master Fund GP.

F3 · ownership.nature: Accordingly, JHL Master Fund, JHL Master Fund GP, JHL Capital Group, JHL Capital Group L.P. and Mr. Litinsky may be deemed to beneficially own issuer's common stock to be held directly by JHL Capital Group Holdings One LLC and JHL Capital Group Holdings Two LLC. Mr. Litinsky disclaims any beneficial ownership in the shares of common stock described in the prior sentence, other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001140361-23-027511 · form4.xml · nonDerivative · entry 5

JHL Capital Group LLC · CIK 0001496859 · 10% owner

JHL Capital Group Holdings One LLC · CIK 0001831474 · 10% owner

JHL Capital Group Holdings Two LLC · CIK 0001831473 · 10% owner

JHL Capital Group Master Fund L.P. · CIK 0001831478 · 10% owner

JHL Capital Group Master Fund GP Ltd. · CIK 0001831476 · 10% owner

JHL Capital Group L.P. · CIK 0001831475 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

F8 · kind: On May 26, 2023, JHL Capital Group made an in-kind distribution of Shares on a pro rata basis, for no consideration.

F9 · shares: Includes Shares previously held indirectly through JHL Capital Group Holdings One LLC and JHL Capital Group Holdings Two LLC, which were distributed in-kind on a pro rata basis, for no consideration, on May 26, 2023, in a transaction exempt from Section 16 under Rule 16a-9.

SEC source: 0001140361-23-027511 · form4.xml · nonDerivative · entry 4

JHL Capital Group LLC · CIK 0001496859 · 10% owner

JHL Capital Group Holdings One LLC · CIK 0001831474 · 10% owner

JHL Capital Group Holdings Two LLC · CIK 0001831473 · 10% owner

JHL Capital Group Master Fund L.P. · CIK 0001831478 · 10% owner

JHL Capital Group Master Fund GP Ltd. · CIK 0001831476 · 10% owner

JHL Capital Group L.P. · CIK 0001831475 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · Held by JHL Capital Group Holdings Two LLC

Disclosed balance after: 0

F7 · kind: On May 26, 2023, JHL Capital Group Holdings Two LLC made an in-kind distribution of Shares on a pro rata basis, for no consideration.

F2 · ownership.direct: JHL Capital Group Master Fund L.P., a Cayman Islands limited partnership ("JHL Master Fund"), is the 100% owner of each of JHL Capital Group Holdings One LLC and JHL Capital Group Holdings Two LLC. JHL Capital Group Master Fund GP Ltd., a Cayman Islands exempted company ("JHL Master Fund GP"), is the general partner of JHL Master Fund. JHL Capital Group LLC, a Delaware limited liability company ("JHL Capital Group"), is the investment manager of JHL Master Fund, and is also the 100% owner of JHL Master Fund GP. JHL Capital Group L.P. and Mr. Litinsky may be deemed to beneficially own the shares held by JHL Capital Group LLC. James H. Litinsky holds a controlling interest in JHL Capital Group L.P. and serves as Chief Executive Officer of JHL Capital Group, as well as director of JHL Master Fund GP.

F3 · ownership.direct: Accordingly, JHL Master Fund, JHL Master Fund GP, JHL Capital Group, JHL Capital Group L.P. and Mr. Litinsky may be deemed to beneficially own MP Materials Corp. (the "Issuer") Class A common stock ("Shares") to be held directly by JHL Capital Group Holdings One LLC and JHL Capital Group Holdings Two LLC. Mr. Litinsky disclaims any beneficial ownership in the Shares described in the prior sentence, other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

F2 · ownership.nature: JHL Capital Group Master Fund L.P., a Cayman Islands limited partnership ("JHL Master Fund"), is the 100% owner of each of JHL Capital Group Holdings One LLC and JHL Capital Group Holdings Two LLC. JHL Capital Group Master Fund GP Ltd., a Cayman Islands exempted company ("JHL Master Fund GP"), is the general partner of JHL Master Fund. JHL Capital Group LLC, a Delaware limited liability company ("JHL Capital Group"), is the investment manager of JHL Master Fund, and is also the 100% owner of JHL Master Fund GP. JHL Capital Group L.P. and Mr. Litinsky may be deemed to beneficially own the shares held by JHL Capital Group LLC. James H. Litinsky holds a controlling interest in JHL Capital Group L.P. and serves as Chief Executive Officer of JHL Capital Group, as well as director of JHL Master Fund GP.

F3 · ownership.nature: Accordingly, JHL Master Fund, JHL Master Fund GP, JHL Capital Group, JHL Capital Group L.P. and Mr. Litinsky may be deemed to beneficially own MP Materials Corp. (the "Issuer") Class A common stock ("Shares") to be held directly by JHL Capital Group Holdings One LLC and JHL Capital Group Holdings Two LLC. Mr. Litinsky disclaims any beneficial ownership in the Shares described in the prior sentence, other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001140361-23-027511 · form4.xml · nonDerivative · entry 3

JHL Capital Group LLC · CIK 0001496859 · 10% owner

JHL Capital Group Holdings One LLC · CIK 0001831474 · 10% owner

JHL Capital Group Holdings Two LLC · CIK 0001831473 · 10% owner

JHL Capital Group Master Fund L.P. · CIK 0001831478 · 10% owner

JHL Capital Group Master Fund GP Ltd. · CIK 0001831476 · 10% owner

JHL Capital Group L.P. · CIK 0001831475 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · Held by JHL Capital Group Holdings One LLC

Disclosed balance after: 0

F4 · kind: The sales of Shares by JHL Capital Group Holdings One LLC were made to cover taxes of JHL Capital Group Fund Ltd associated with the distribution of Shares on May 26, 2023.

F6 · price: The price reported in Column 4 is a weighted average price. These Shares were sold in multiple transactions at prices ranging from $22.00 to $22.66, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Shares sold at each separate price within the range set forth in this footnote 6 to this Form 4.

F2 · ownership.direct: JHL Capital Group Master Fund L.P., a Cayman Islands limited partnership ("JHL Master Fund"), is the 100% owner of each of JHL Capital Group Holdings One LLC and JHL Capital Group Holdings Two LLC. JHL Capital Group Master Fund GP Ltd., a Cayman Islands exempted company ("JHL Master Fund GP"), is the general partner of JHL Master Fund. JHL Capital Group LLC, a Delaware limited liability company ("JHL Capital Group"), is the investment manager of JHL Master Fund, and is also the 100% owner of JHL Master Fund GP. JHL Capital Group L.P. and Mr. Litinsky may be deemed to beneficially own the shares held by JHL Capital Group LLC. James H. Litinsky holds a controlling interest in JHL Capital Group L.P. and serves as Chief Executive Officer of JHL Capital Group, as well as director of JHL Master Fund GP.

F3 · ownership.direct: Accordingly, JHL Master Fund, JHL Master Fund GP, JHL Capital Group, JHL Capital Group L.P. and Mr. Litinsky may be deemed to beneficially own MP Materials Corp. (the "Issuer") Class A common stock ("Shares") to be held directly by JHL Capital Group Holdings One LLC and JHL Capital Group Holdings Two LLC. Mr. Litinsky disclaims any beneficial ownership in the Shares described in the prior sentence, other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

F2 · ownership.nature: JHL Capital Group Master Fund L.P., a Cayman Islands limited partnership ("JHL Master Fund"), is the 100% owner of each of JHL Capital Group Holdings One LLC and JHL Capital Group Holdings Two LLC. JHL Capital Group Master Fund GP Ltd., a Cayman Islands exempted company ("JHL Master Fund GP"), is the general partner of JHL Master Fund. JHL Capital Group LLC, a Delaware limited liability company ("JHL Capital Group"), is the investment manager of JHL Master Fund, and is also the 100% owner of JHL Master Fund GP. JHL Capital Group L.P. and Mr. Litinsky may be deemed to beneficially own the shares held by JHL Capital Group LLC. James H. Litinsky holds a controlling interest in JHL Capital Group L.P. and serves as Chief Executive Officer of JHL Capital Group, as well as director of JHL Master Fund GP.

F3 · ownership.nature: Accordingly, JHL Master Fund, JHL Master Fund GP, JHL Capital Group, JHL Capital Group L.P. and Mr. Litinsky may be deemed to beneficially own MP Materials Corp. (the "Issuer") Class A common stock ("Shares") to be held directly by JHL Capital Group Holdings One LLC and JHL Capital Group Holdings Two LLC. Mr. Litinsky disclaims any beneficial ownership in the Shares described in the prior sentence, other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001140361-23-027511 · form4.xml · nonDerivative · entry 2

JHL Capital Group LLC · CIK 0001496859 · 10% owner

JHL Capital Group Holdings One LLC · CIK 0001831474 · 10% owner

JHL Capital Group Holdings Two LLC · CIK 0001831473 · 10% owner

JHL Capital Group Master Fund L.P. · CIK 0001831478 · 10% owner

JHL Capital Group Master Fund GP Ltd. · CIK 0001831476 · 10% owner

JHL Capital Group L.P. · CIK 0001831475 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · Held by JHL Capital Group Holdings One LLC

Disclosed balance after: 62,820

F4 · kind: The sales of Shares by JHL Capital Group Holdings One LLC were made to cover taxes of JHL Capital Group Fund Ltd associated with the distribution of Shares on May 26, 2023.

F5 · price: The price reported in Column 4 is a weighted average price. These Shares were sold in multiple transactions at prices ranging from $21.50 to $21.9675, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Shares sold at each separate price within the range set forth in this footnote 5 to this Form 4.

F2 · ownership.direct: JHL Capital Group Master Fund L.P., a Cayman Islands limited partnership ("JHL Master Fund"), is the 100% owner of each of JHL Capital Group Holdings One LLC and JHL Capital Group Holdings Two LLC. JHL Capital Group Master Fund GP Ltd., a Cayman Islands exempted company ("JHL Master Fund GP"), is the general partner of JHL Master Fund. JHL Capital Group LLC, a Delaware limited liability company ("JHL Capital Group"), is the investment manager of JHL Master Fund, and is also the 100% owner of JHL Master Fund GP. JHL Capital Group L.P. and Mr. Litinsky may be deemed to beneficially own the shares held by JHL Capital Group LLC. James H. Litinsky holds a controlling interest in JHL Capital Group L.P. and serves as Chief Executive Officer of JHL Capital Group, as well as director of JHL Master Fund GP.

F3 · ownership.direct: Accordingly, JHL Master Fund, JHL Master Fund GP, JHL Capital Group, JHL Capital Group L.P. and Mr. Litinsky may be deemed to beneficially own MP Materials Corp. (the "Issuer") Class A common stock ("Shares") to be held directly by JHL Capital Group Holdings One LLC and JHL Capital Group Holdings Two LLC. Mr. Litinsky disclaims any beneficial ownership in the Shares described in the prior sentence, other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

F2 · ownership.nature: JHL Capital Group Master Fund L.P., a Cayman Islands limited partnership ("JHL Master Fund"), is the 100% owner of each of JHL Capital Group Holdings One LLC and JHL Capital Group Holdings Two LLC. JHL Capital Group Master Fund GP Ltd., a Cayman Islands exempted company ("JHL Master Fund GP"), is the general partner of JHL Master Fund. JHL Capital Group LLC, a Delaware limited liability company ("JHL Capital Group"), is the investment manager of JHL Master Fund, and is also the 100% owner of JHL Master Fund GP. JHL Capital Group L.P. and Mr. Litinsky may be deemed to beneficially own the shares held by JHL Capital Group LLC. James H. Litinsky holds a controlling interest in JHL Capital Group L.P. and serves as Chief Executive Officer of JHL Capital Group, as well as director of JHL Master Fund GP.

F3 · ownership.nature: Accordingly, JHL Master Fund, JHL Master Fund GP, JHL Capital Group, JHL Capital Group L.P. and Mr. Litinsky may be deemed to beneficially own MP Materials Corp. (the "Issuer") Class A common stock ("Shares") to be held directly by JHL Capital Group Holdings One LLC and JHL Capital Group Holdings Two LLC. Mr. Litinsky disclaims any beneficial ownership in the Shares described in the prior sentence, other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001140361-23-027511 · form4.xml · nonDerivative · entry 1

JHL Capital Group LLC · CIK 0001496859 · 10% owner

JHL Capital Group Holdings One LLC · CIK 0001831474 · 10% owner

JHL Capital Group Holdings Two LLC · CIK 0001831473 · 10% owner

JHL Capital Group Master Fund L.P. · CIK 0001831478 · 10% owner

JHL Capital Group Master Fund GP Ltd. · CIK 0001831476 · 10% owner

JHL Capital Group L.P. · CIK 0001831475 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · Held by JHL Capital Group Holdings One LLC

Disclosed balance after: 647,832

F1 · kind: On May 26, 2023, JHL Capital Group Holdings One LLC made an in-kind distribution of Shares on a pro rata basis, for no consideration.

F2 · ownership.direct: JHL Capital Group Master Fund L.P., a Cayman Islands limited partnership ("JHL Master Fund"), is the 100% owner of each of JHL Capital Group Holdings One LLC and JHL Capital Group Holdings Two LLC. JHL Capital Group Master Fund GP Ltd., a Cayman Islands exempted company ("JHL Master Fund GP"), is the general partner of JHL Master Fund. JHL Capital Group LLC, a Delaware limited liability company ("JHL Capital Group"), is the investment manager of JHL Master Fund, and is also the 100% owner of JHL Master Fund GP. JHL Capital Group L.P. and Mr. Litinsky may be deemed to beneficially own the shares held by JHL Capital Group LLC. James H. Litinsky holds a controlling interest in JHL Capital Group L.P. and serves as Chief Executive Officer of JHL Capital Group, as well as director of JHL Master Fund GP.

F3 · ownership.direct: Accordingly, JHL Master Fund, JHL Master Fund GP, JHL Capital Group, JHL Capital Group L.P. and Mr. Litinsky may be deemed to beneficially own MP Materials Corp. (the "Issuer") Class A common stock ("Shares") to be held directly by JHL Capital Group Holdings One LLC and JHL Capital Group Holdings Two LLC. Mr. Litinsky disclaims any beneficial ownership in the Shares described in the prior sentence, other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

F2 · ownership.nature: JHL Capital Group Master Fund L.P., a Cayman Islands limited partnership ("JHL Master Fund"), is the 100% owner of each of JHL Capital Group Holdings One LLC and JHL Capital Group Holdings Two LLC. JHL Capital Group Master Fund GP Ltd., a Cayman Islands exempted company ("JHL Master Fund GP"), is the general partner of JHL Master Fund. JHL Capital Group LLC, a Delaware limited liability company ("JHL Capital Group"), is the investment manager of JHL Master Fund, and is also the 100% owner of JHL Master Fund GP. JHL Capital Group L.P. and Mr. Litinsky may be deemed to beneficially own the shares held by JHL Capital Group LLC. James H. Litinsky holds a controlling interest in JHL Capital Group L.P. and serves as Chief Executive Officer of JHL Capital Group, as well as director of JHL Master Fund GP.

F3 · ownership.nature: Accordingly, JHL Master Fund, JHL Master Fund GP, JHL Capital Group, JHL Capital Group L.P. and Mr. Litinsky may be deemed to beneficially own MP Materials Corp. (the "Issuer") Class A common stock ("Shares") to be held directly by JHL Capital Group Holdings One LLC and JHL Capital Group Holdings Two LLC. Mr. Litinsky disclaims any beneficial ownership in the Shares described in the prior sentence, other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001209191-23-032179 · doc4.xml · nonDerivative · entry 1

Rosenthal Michael Stuart · CIK 0001832050 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · By Rosenthal Family Trust

Disclosed balance after: 39,476

SEC source: 0001209191-23-031736 · doc4.xml · nonDerivative · entry 1

Rosenthal Michael Stuart · CIK 0001832050 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · By Rosenthal Family Trust

Disclosed balance after: 34,476

SEC source: 0001209191-23-031504 · doc4.xml · nonDerivative · entry 1

Rosenthal Michael Stuart · CIK 0001832050 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · By Rosenthal Family Trust

Disclosed balance after: 29,476

SEC source: 0001209191-23-031297 · doc4.xml · nonDerivative · entry 1

Rosenthal Michael Stuart · CIK 0001832050 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · By Rosenthal Family Trust

Disclosed balance after: 24,476

SEC source: 0001209191-23-030556 · doc4.xml · nonDerivative · entry 1

Rosenthal Michael Stuart · CIK 0001832050 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,467,279

F1 · kind: The Reporting Person acquired the shares reported herein as a limited partner in certain entities in pro rata in-kind distributions by such entities, for no consideration, the acquisition of which was exempt pursuant to Rule 16a-9.

SEC source: 0001209191-23-031095 · doc4.xml · nonDerivative · entry 3

Hoops Elliot Dean · CIK 0001862894 · General Counsel and Secretary

10b5-1 filing: No plan indicated

Ownership: Indirect · By Hoops Family Trust

Disclosed balance after: 24,749

F1 · kind: This transaction involved a gift of shares by the reporting person to the Hoops Family Trust, a living trust, on May 18, 2023. These shares were previously reported as directly beneficially owned by the reporting person.

SEC source: 0001209191-23-031095 · doc4.xml · nonDerivative · entry 2

Hoops Elliot Dean · CIK 0001862894 · General Counsel and Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 40,814

F1 · kind: This transaction involved a gift of shares by the reporting person to the Hoops Family Trust, a living trust, on May 18, 2023. These shares were previously reported as directly beneficially owned by the reporting person.

SEC source: 0001209191-23-031095 · doc4.xml · nonDerivative · entry 1

Hoops Elliot Dean · CIK 0001862894 · General Counsel and Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 44,243

SEC source: 0001209191-23-021930 · doc4.xml · nonDerivative · entry 1

DUCKWORTH CONNIE K · CIK 0001180940 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,931

F1 · shares: Represents deferred stock units ("DSUs") awarded in connection with the election to defer cash retainers by the reporting person. Each DSU represents a right to receive a share of the registrant's common stock and are fully vested on grant. The DSUs will be settled upon the earlier to occur of the following: (i) June 15th occurring following the close of the fifth calendar year following the close of the calendar year in which the cash retainers are earned; (ii) certain changes in control of the registrant; and (iii) the date of the reporting person's separation from service.

SEC source: 0001209191-23-021940 · doc4.xml · nonDerivative · entry 1

Lavan Maryanne · CIK 0001495449 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,227

F1 · shares: Represents deferred stock units ("DSUs") awarded in connection with the election to defer cash retainers by the reporting person. Each DSU represents a right to receive a share of the registrant's common stock and are fully vested on grant. The DSUs will be settled upon the earlier to occur of the following: (i) June 15th occurring following the close of the fifth calendar year following the close of the calendar year in which the cash retainers are earned; (ii) certain changes in control of the registrant; and (iii) the date of the reporting person's separation from service.

SEC source: 0001209191-23-019591 · doc4.xml · nonDerivative · entry 1

Corbett Ryan · CIK 0001831686 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 225,881

SEC source: 0001209191-23-019612 · doc4.xml · nonDerivative · entry 1

Rosenthal Michael Stuart · CIK 0001832050 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,112,574

SEC source: 0001209191-23-017858 · doc4.xml · derivative · entry 1

DONALD ARNOLD W · CIK 0001083206 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,882

Underlying: Common Stock · 1,882 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of MP Materials Corp. ("Issuer") common stock. These RSUs vest on the earlier of: (i) June 15, 2023; and (ii) the next annual meeting of the Issuer's stockholders, subject to the reporting person's continued service through the applicable vesting date, and settled upon the earlier to occur of (x) June 15th following the fifth anniversary of the vesting date; (y) a "change in control event" within the meaning of Section 409A of the Internal Revenue Code; and (z) the date of the director's separation from service. These RSUs fully vest upon a change in control of the Issuer or the director's termination of service due to death or disability.

F1 · derivative.exercise_date: Each restricted stock unit ("RSU") represents a contingent right to receive one share of MP Materials Corp. ("Issuer") common stock. These RSUs vest on the earlier of: (i) June 15, 2023; and (ii) the next annual meeting of the Issuer's stockholders, subject to the reporting person's continued service through the applicable vesting date, and settled upon the earlier to occur of (x) June 15th following the fifth anniversary of the vesting date; (y) a "change in control event" within the meaning of Section 409A of the Internal Revenue Code; and (z) the date of the director's separation from service. These RSUs fully vest upon a change in control of the Issuer or the director's termination of service due to death or disability.

F1 · derivative.expiration_date: Each restricted stock unit ("RSU") represents a contingent right to receive one share of MP Materials Corp. ("Issuer") common stock. These RSUs vest on the earlier of: (i) June 15, 2023; and (ii) the next annual meeting of the Issuer's stockholders, subject to the reporting person's continued service through the applicable vesting date, and settled upon the earlier to occur of (x) June 15th following the fifth anniversary of the vesting date; (y) a "change in control event" within the meaning of Section 409A of the Internal Revenue Code; and (z) the date of the director's separation from service. These RSUs fully vest upon a change in control of the Issuer or the director's termination of service due to death or disability.

SEC source: 0001209191-23-010914 · doc4.xml · nonDerivative · entry 1

Rosenthal Michael Stuart · CIK 0001832050 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,112,919

F1 · shares: Represents shares withheld to satisfy tax withholding obligations applicable to the vesting of 312,601 shares of restricted stock that vested on February 17, 2023.

SEC source: 0001209191-23-004335 · doc4.xml · nonDerivative · entry 2

Hoops Elliot Dean · CIK 0001862894 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Indirect · By Hoops Family Trust

Disclosed balance after: 21,320

F1 · kind: This transaction involved a gift of shares by the reporting person to the Hoops Family Trust, a living trust, on January 18, 2023. These shares were previously reported as directly beneficially owned by the reporting person.

SEC source: 0001209191-23-004335 · doc4.xml · nonDerivative · entry 1

Hoops Elliot Dean · CIK 0001862894 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 49,922

F1 · kind: This transaction involved a gift of shares by the reporting person to the Hoops Family Trust, a living trust, on January 18, 2023. These shares were previously reported as directly beneficially owned by the reporting person.

SEC source: 0001209191-23-003594 · doc4.xml · nonDerivative · entry 2

Corbett Ryan · CIK 0001831686 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 225,997

F2 · shares: Represents shares withheld to satisfy tax withholding obligation applicable to the vesting of 8,919 restricted stock units that vested on January 14, 2023.

SEC source: 0001209191-23-003568 · doc4.xml · nonDerivative · entry 2

Hoops Elliot Dean · CIK 0001862894 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 57,584

F2 · shares: Represents shares withheld to satisfy tax withholding obligation applicable to the vesting of 3,301 restricted stock units that vested on January 14, 2023.

SEC source: 0001209191-23-003594 · doc4.xml · nonDerivative · entry 1

Corbett Ryan · CIK 0001831686 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 228,407

F1 · shares: 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 Class A common stock.

SEC source: 0001209191-23-003568 · doc4.xml · nonDerivative · entry 1

Hoops Elliot Dean · CIK 0001862894 · General Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 58,564

F1 · shares: 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 Class A common stock.

SEC source: 0001209191-23-003611 · doc4.xml · nonDerivative · entry 1

Rosenthal Michael Stuart · CIK 0001832050 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,267,035

F1 · shares: 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 Class A common stock.

SEC source: 0001209191-23-003602 · doc4.xml · nonDerivative · entry 1

Litinsky James H. · CIK 0001831746 · Director · Chairman and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 621,993

F1 · shares: 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 Class A common stock.

SEC source: 0001209191-23-000470 · doc4.xml · nonDerivative · entry 1

DUCKWORTH CONNIE K · CIK 0001180940 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,867

F1 · shares: Represents deferred stock units ("DSUs") awarded in connection with the election to defer cash retainers by the reporting person. Each DSU represents a right to receive a share of the registrant's common stock and are fully vested on grant. The DSUs will be settled upon the earlier to occur of the following: (i) June 15th occurring following the close of the fifth calendar year following the close of the calendar year in which the cash retainers are earned; (ii) certain changes in control of the registrant; and (iii) the date of the reporting person's separation from service.

SEC source: 0001209191-23-000467 · doc4.xml · nonDerivative · entry 1

Lavan Maryanne · CIK 0001495449 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,230

F1 · shares: Represents deferred stock units ("DSUs") awarded in connection with the election to defer cash retainers by the reporting person. Each DSU represents a right to receive a share of the registrant's common stock and are fully vested on grant. The DSUs will be settled upon the earlier to occur of the following: (i) June 15th occurring following the close of the fifth calendar year following the close of the calendar year in which the cash retainers are earned; (ii) certain changes in control of the registrant; and (iii) the date of the reporting person's separation from service.

SEC source: 0001209191-23-000465 · doc4.xml · nonDerivative · entry 1

MYERS RICHARD B · CIK 0001356702 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,794

F1 · shares: Represents deferred stock units ("DSUs") awarded in connection with the election to defer cash retainers by the reporting person. Each DSU represents a right to receive a share of the registrant's common stock and are fully vested on grant. The DSUs will be settled upon the earlier to occur of the following: (i) June 15th occurring following the close of the fifth calendar year following the close of the calendar year in which the cash retainers are earned; (ii) certain changes in control of the registrant; and (iii) the date of the reporting person's separation from service.

SEC source: 0000899243-22-038622 · doc4.xml · nonDerivative · entry 9

QVT Financial LP · CIK 0001290162 · Director · Director by Deputization

10b5-1 filing: Not disclosed

Ownership: Indirect · Held by Saratoga Park Ltd

Disclosed balance after: 5,542,000

F1 · ownership.direct: QVT Financial LP and its general partner, QVT Financial GP LLC (together, "QVT"), may be deemed to have beneficial ownership over the 13,501,578 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.

F1 · ownership.nature: QVT Financial LP and its general partner, QVT Financial GP LLC (together, "QVT"), may be deemed to have beneficial ownership over the 13,501,578 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.

SEC source: 0000899243-22-038622 · doc4.xml · nonDerivative · entry 8

QVT Financial LP · CIK 0001290162 · Director · Director by Deputization

10b5-1 filing: Not disclosed

Ownership: Indirect · Held by QVT Family Office Onshore LP

Disclosed balance after: 1,120,014

F1 · ownership.direct: QVT Financial LP and its general partner, QVT Financial GP LLC (together, "QVT"), may be deemed to have beneficial ownership over the 13,501,578 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.

F1 · ownership.nature: QVT Financial LP and its general partner, QVT Financial GP LLC (together, "QVT"), may be deemed to have beneficial ownership over the 13,501,578 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.

SEC source: 0000899243-22-038622 · doc4.xml · nonDerivative · entry 7

QVT Financial LP · CIK 0001290162 · Director · Director by Deputization

10b5-1 filing: Not disclosed

Ownership: Indirect · Held by Fourth Avenue FF Opportunities LP - Series E

Disclosed balance after: 6,839,564

F1 · ownership.direct: QVT Financial LP and its general partner, QVT Financial GP LLC (together, "QVT"), may be deemed to have beneficial ownership over the 13,501,578 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.

F1 · ownership.nature: QVT Financial LP and its general partner, QVT Financial GP LLC (together, "QVT"), may be deemed to have beneficial ownership over the 13,501,578 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.

SEC source: 0001209191-22-061468 · doc4.xml · nonDerivative · entry 9

Gold Daniel Allen · CIK 0001832142 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Held by Saratoga Park Ltd.

Disclosed balance after: 5,542,000

F2 · ownership.direct: Daniel Gold disclaims any beneficial ownership in the Shares described herein, other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

F3 · ownership.direct: Management of QVT Family Office Onshore LP ("QVT Onshore") is vested in its general partner, QVT Associates GP LLC, a Delaware limited liability company ("QVT Associates GP"), which may be deemed to beneficially own the Shares held directly by QVT Onshore. QVT Financial LP, a Delaware limited partnership, is the investment manager of QVT Onshore and Saratoga Park Ltd. ("Saratoga"), and shares voting and investment control over the Shares held directly by QVT Onshore and Saratoga. QVT Financial GP LLC ("QVT Financial GP"), a Delaware limited liability company, is the general partner of QVT Financial LP. Daniel Gold is a Managing Member of each of QVT Associates GP and QVT Financial GP, sharing voting and investment control over the Shares held directly by QVT Onshore and Saratoga and may be deemed to beneficially own such Shares.

F2 · ownership.nature: Daniel Gold disclaims any beneficial ownership in the Shares described herein, other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

F3 · ownership.nature: Management of QVT Family Office Onshore LP ("QVT Onshore") is vested in its general partner, QVT Associates GP LLC, a Delaware limited liability company ("QVT Associates GP"), which may be deemed to beneficially own the Shares held directly by QVT Onshore. QVT Financial LP, a Delaware limited partnership, is the investment manager of QVT Onshore and Saratoga Park Ltd. ("Saratoga"), and shares voting and investment control over the Shares held directly by QVT Onshore and Saratoga. QVT Financial GP LLC ("QVT Financial GP"), a Delaware limited liability company, is the general partner of QVT Financial LP. Daniel Gold is a Managing Member of each of QVT Associates GP and QVT Financial GP, sharing voting and investment control over the Shares held directly by QVT Onshore and Saratoga and may be deemed to beneficially own such Shares.

SEC source: 0001209191-22-061468 · doc4.xml · nonDerivative · entry 8

Gold Daniel Allen · CIK 0001832142 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Held by QVT Family Office Onshore LP

Disclosed balance after: 1,120,014

F2 · ownership.direct: Daniel Gold disclaims any beneficial ownership in the Shares described herein, other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

F3 · ownership.direct: Management of QVT Family Office Onshore LP ("QVT Onshore") is vested in its general partner, QVT Associates GP LLC, a Delaware limited liability company ("QVT Associates GP"), which may be deemed to beneficially own the Shares held directly by QVT Onshore. QVT Financial LP, a Delaware limited partnership, is the investment manager of QVT Onshore and Saratoga Park Ltd. ("Saratoga"), and shares voting and investment control over the Shares held directly by QVT Onshore and Saratoga. QVT Financial GP LLC ("QVT Financial GP"), a Delaware limited liability company, is the general partner of QVT Financial LP. Daniel Gold is a Managing Member of each of QVT Associates GP and QVT Financial GP, sharing voting and investment control over the Shares held directly by QVT Onshore and Saratoga and may be deemed to beneficially own such Shares.

F2 · ownership.nature: Daniel Gold disclaims any beneficial ownership in the Shares described herein, other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

F3 · ownership.nature: Management of QVT Family Office Onshore LP ("QVT Onshore") is vested in its general partner, QVT Associates GP LLC, a Delaware limited liability company ("QVT Associates GP"), which may be deemed to beneficially own the Shares held directly by QVT Onshore. QVT Financial LP, a Delaware limited partnership, is the investment manager of QVT Onshore and Saratoga Park Ltd. ("Saratoga"), and shares voting and investment control over the Shares held directly by QVT Onshore and Saratoga. QVT Financial GP LLC ("QVT Financial GP"), a Delaware limited liability company, is the general partner of QVT Financial LP. Daniel Gold is a Managing Member of each of QVT Associates GP and QVT Financial GP, sharing voting and investment control over the Shares held directly by QVT Onshore and Saratoga and may be deemed to beneficially own such Shares.

SEC source: 0001209191-22-061468 · doc4.xml · nonDerivative · entry 7

Gold Daniel Allen · CIK 0001832142 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Held by Fourth Avenue FF Opportunities LP - Series E

Disclosed balance after: 6,839,564

F1 · ownership.direct: Management of Fourth Avenue FF-E is vested in its general partner, Fourth Avenue Capital Partners GP LLC, a Delaware limited liability company ("Fourth Avenue GP"), which may be deemed to beneficially own the shares of MP Materials Corp. (the "Issuer") Class A common stock ("Shares") held directly by Fourth Avenue FF-E. Daniel Gold is a Managing Member of Fourth Avenue GP, sharing voting and investment control over the Shares held directly by Fourth Avenue FF-E and may be deemed to beneficially own such Shares.

F2 · ownership.direct: Daniel Gold disclaims any beneficial ownership in the Shares described herein, other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

F1 · ownership.nature: Management of Fourth Avenue FF-E is vested in its general partner, Fourth Avenue Capital Partners GP LLC, a Delaware limited liability company ("Fourth Avenue GP"), which may be deemed to beneficially own the shares of MP Materials Corp. (the "Issuer") Class A common stock ("Shares") held directly by Fourth Avenue FF-E. Daniel Gold is a Managing Member of Fourth Avenue GP, sharing voting and investment control over the Shares held directly by Fourth Avenue FF-E and may be deemed to beneficially own such Shares.

F2 · ownership.nature: Daniel Gold disclaims any beneficial ownership in the Shares described herein, other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0000899243-22-038622 · doc4.xml · nonDerivative · entry 6

QVT Financial LP · CIK 0001290162 · Director · Director by Deputization

10b5-1 filing: Not disclosed

Ownership: Indirect · Held by Saratoga Park Ltd

Disclosed balance after: 5,564,043

F1 · ownership.direct: QVT Financial LP and its general partner, QVT Financial GP LLC (together, "QVT"), may be deemed to have beneficial ownership over the 13,501,578 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.

F1 · ownership.nature: QVT Financial LP and its general partner, QVT Financial GP LLC (together, "QVT"), may be deemed to have beneficial ownership over the 13,501,578 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.

SEC source: 0000899243-22-038622 · doc4.xml · nonDerivative · entry 5

QVT Financial LP · CIK 0001290162 · Director · Director by Deputization

10b5-1 filing: Not disclosed

Ownership: Indirect · Held by QVT Family Office Onshore LP

Disclosed balance after: 1,124,469

F1 · ownership.direct: QVT Financial LP and its general partner, QVT Financial GP LLC (together, "QVT"), may be deemed to have beneficial ownership over the 13,501,578 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.

F1 · ownership.nature: QVT Financial LP and its general partner, QVT Financial GP LLC (together, "QVT"), may be deemed to have beneficial ownership over the 13,501,578 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.

SEC source: 0000899243-22-038622 · doc4.xml · nonDerivative · entry 4

QVT Financial LP · CIK 0001290162 · Director · Director by Deputization

10b5-1 filing: Not disclosed

Ownership: Indirect · Held by Fourth Avenue FF Opportunities LP - Series E

Disclosed balance after: 6,866,768

F1 · ownership.direct: QVT Financial LP and its general partner, QVT Financial GP LLC (together, "QVT"), may be deemed to have beneficial ownership over the 13,501,578 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.

F1 · ownership.nature: QVT Financial LP and its general partner, QVT Financial GP LLC (together, "QVT"), may be deemed to have beneficial ownership over the 13,501,578 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.

SEC source: 0000899243-22-038622 · doc4.xml · nonDerivative · entry 3

QVT Financial LP · CIK 0001290162 · Director · Director by Deputization

10b5-1 filing: Not disclosed

Ownership: Indirect · Held by Saratoga Park Ltd

Disclosed balance after: 5,584,566

F1 · ownership.direct: QVT Financial LP and its general partner, QVT Financial GP LLC (together, "QVT"), may be deemed to have beneficial ownership over the 13,501,578 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.

F1 · ownership.nature: QVT Financial LP and its general partner, QVT Financial GP LLC (together, "QVT"), may be deemed to have beneficial ownership over the 13,501,578 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.

SEC source: 0000899243-22-038622 · doc4.xml · nonDerivative · entry 2

QVT Financial LP · CIK 0001290162 · Director · Director by Deputization

10b5-1 filing: Not disclosed

Ownership: Indirect · Held by QVT Family Office Onshore LP

Disclosed balance after: 1,128,617

F1 · ownership.direct: QVT Financial LP and its general partner, QVT Financial GP LLC (together, "QVT"), may be deemed to have beneficial ownership over the 13,501,578 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.

F1 · ownership.nature: QVT Financial LP and its general partner, QVT Financial GP LLC (together, "QVT"), may be deemed to have beneficial ownership over the 13,501,578 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.

SEC source: 0000899243-22-038622 · doc4.xml · nonDerivative · entry 1

QVT Financial LP · CIK 0001290162 · Director · Director by Deputization

10b5-1 filing: Not disclosed

Ownership: Indirect · Held by Fourth Avenue FF Opportunities LP - Series E

Disclosed balance after: 6,892,097

F1 · ownership.direct: QVT Financial LP and its general partner, QVT Financial GP LLC (together, "QVT"), may be deemed to have beneficial ownership over the 13,501,578 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.

F1 · ownership.nature: QVT Financial LP and its general partner, QVT Financial GP LLC (together, "QVT"), may be deemed to have beneficial ownership over the 13,501,578 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.

SEC source: 0001209191-22-061468 · doc4.xml · nonDerivative · entry 6

Gold Daniel Allen · CIK 0001832142 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Held by Saratoga Park Ltd.

Disclosed balance after: 5,564,043

F2 · ownership.direct: Daniel Gold disclaims any beneficial ownership in the Shares described herein, other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

F3 · ownership.direct: Management of QVT Family Office Onshore LP ("QVT Onshore") is vested in its general partner, QVT Associates GP LLC, a Delaware limited liability company ("QVT Associates GP"), which may be deemed to beneficially own the Shares held directly by QVT Onshore. QVT Financial LP, a Delaware limited partnership, is the investment manager of QVT Onshore and Saratoga Park Ltd. ("Saratoga"), and shares voting and investment control over the Shares held directly by QVT Onshore and Saratoga. QVT Financial GP LLC ("QVT Financial GP"), a Delaware limited liability company, is the general partner of QVT Financial LP. Daniel Gold is a Managing Member of each of QVT Associates GP and QVT Financial GP, sharing voting and investment control over the Shares held directly by QVT Onshore and Saratoga and may be deemed to beneficially own such Shares.

F2 · ownership.nature: Daniel Gold disclaims any beneficial ownership in the Shares described herein, other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

F3 · ownership.nature: Management of QVT Family Office Onshore LP ("QVT Onshore") is vested in its general partner, QVT Associates GP LLC, a Delaware limited liability company ("QVT Associates GP"), which may be deemed to beneficially own the Shares held directly by QVT Onshore. QVT Financial LP, a Delaware limited partnership, is the investment manager of QVT Onshore and Saratoga Park Ltd. ("Saratoga"), and shares voting and investment control over the Shares held directly by QVT Onshore and Saratoga. QVT Financial GP LLC ("QVT Financial GP"), a Delaware limited liability company, is the general partner of QVT Financial LP. Daniel Gold is a Managing Member of each of QVT Associates GP and QVT Financial GP, sharing voting and investment control over the Shares held directly by QVT Onshore and Saratoga and may be deemed to beneficially own such Shares.

SEC source: 0001209191-22-061468 · doc4.xml · nonDerivative · entry 5

Gold Daniel Allen · CIK 0001832142 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Held by QVT Family Office Onshore LP

Disclosed balance after: 1,124,469

F2 · ownership.direct: Daniel Gold disclaims any beneficial ownership in the Shares described herein, other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

F3 · ownership.direct: Management of QVT Family Office Onshore LP ("QVT Onshore") is vested in its general partner, QVT Associates GP LLC, a Delaware limited liability company ("QVT Associates GP"), which may be deemed to beneficially own the Shares held directly by QVT Onshore. QVT Financial LP, a Delaware limited partnership, is the investment manager of QVT Onshore and Saratoga Park Ltd. ("Saratoga"), and shares voting and investment control over the Shares held directly by QVT Onshore and Saratoga. QVT Financial GP LLC ("QVT Financial GP"), a Delaware limited liability company, is the general partner of QVT Financial LP. Daniel Gold is a Managing Member of each of QVT Associates GP and QVT Financial GP, sharing voting and investment control over the Shares held directly by QVT Onshore and Saratoga and may be deemed to beneficially own such Shares.

F2 · ownership.nature: Daniel Gold disclaims any beneficial ownership in the Shares described herein, other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

F3 · ownership.nature: Management of QVT Family Office Onshore LP ("QVT Onshore") is vested in its general partner, QVT Associates GP LLC, a Delaware limited liability company ("QVT Associates GP"), which may be deemed to beneficially own the Shares held directly by QVT Onshore. QVT Financial LP, a Delaware limited partnership, is the investment manager of QVT Onshore and Saratoga Park Ltd. ("Saratoga"), and shares voting and investment control over the Shares held directly by QVT Onshore and Saratoga. QVT Financial GP LLC ("QVT Financial GP"), a Delaware limited liability company, is the general partner of QVT Financial LP. Daniel Gold is a Managing Member of each of QVT Associates GP and QVT Financial GP, sharing voting and investment control over the Shares held directly by QVT Onshore and Saratoga and may be deemed to beneficially own such Shares.

SEC source: 0001209191-22-061468 · doc4.xml · nonDerivative · entry 4

Gold Daniel Allen · CIK 0001832142 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Held by Fourth Avenue FF Opportunities LP - Series E

Disclosed balance after: 6,866,768

F1 · ownership.direct: Management of Fourth Avenue FF-E is vested in its general partner, Fourth Avenue Capital Partners GP LLC, a Delaware limited liability company ("Fourth Avenue GP"), which may be deemed to beneficially own the shares of MP Materials Corp. (the "Issuer") Class A common stock ("Shares") held directly by Fourth Avenue FF-E. Daniel Gold is a Managing Member of Fourth Avenue GP, sharing voting and investment control over the Shares held directly by Fourth Avenue FF-E and may be deemed to beneficially own such Shares.

F2 · ownership.direct: Daniel Gold disclaims any beneficial ownership in the Shares described herein, other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

F1 · ownership.nature: Management of Fourth Avenue FF-E is vested in its general partner, Fourth Avenue Capital Partners GP LLC, a Delaware limited liability company ("Fourth Avenue GP"), which may be deemed to beneficially own the shares of MP Materials Corp. (the "Issuer") Class A common stock ("Shares") held directly by Fourth Avenue FF-E. Daniel Gold is a Managing Member of Fourth Avenue GP, sharing voting and investment control over the Shares held directly by Fourth Avenue FF-E and may be deemed to beneficially own such Shares.

F2 · ownership.nature: Daniel Gold disclaims any beneficial ownership in the Shares described herein, other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001209191-22-061468 · doc4.xml · nonDerivative · entry 3

Gold Daniel Allen · CIK 0001832142 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Held by Saratoga Park Ltd.

Disclosed balance after: 5,584,566

F2 · ownership.direct: Daniel Gold disclaims any beneficial ownership in the Shares described herein, other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

F3 · ownership.direct: Management of QVT Family Office Onshore LP ("QVT Onshore") is vested in its general partner, QVT Associates GP LLC, a Delaware limited liability company ("QVT Associates GP"), which may be deemed to beneficially own the Shares held directly by QVT Onshore. QVT Financial LP, a Delaware limited partnership, is the investment manager of QVT Onshore and Saratoga Park Ltd. ("Saratoga"), and shares voting and investment control over the Shares held directly by QVT Onshore and Saratoga. QVT Financial GP LLC ("QVT Financial GP"), a Delaware limited liability company, is the general partner of QVT Financial LP. Daniel Gold is a Managing Member of each of QVT Associates GP and QVT Financial GP, sharing voting and investment control over the Shares held directly by QVT Onshore and Saratoga and may be deemed to beneficially own such Shares.

F2 · ownership.nature: Daniel Gold disclaims any beneficial ownership in the Shares described herein, other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

F3 · ownership.nature: Management of QVT Family Office Onshore LP ("QVT Onshore") is vested in its general partner, QVT Associates GP LLC, a Delaware limited liability company ("QVT Associates GP"), which may be deemed to beneficially own the Shares held directly by QVT Onshore. QVT Financial LP, a Delaware limited partnership, is the investment manager of QVT Onshore and Saratoga Park Ltd. ("Saratoga"), and shares voting and investment control over the Shares held directly by QVT Onshore and Saratoga. QVT Financial GP LLC ("QVT Financial GP"), a Delaware limited liability company, is the general partner of QVT Financial LP. Daniel Gold is a Managing Member of each of QVT Associates GP and QVT Financial GP, sharing voting and investment control over the Shares held directly by QVT Onshore and Saratoga and may be deemed to beneficially own such Shares.

SEC source: 0001209191-22-061468 · doc4.xml · nonDerivative · entry 2

Gold Daniel Allen · CIK 0001832142 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Held by QVT Family Office Onshore LP

Disclosed balance after: 1,128,617

F2 · ownership.direct: Daniel Gold disclaims any beneficial ownership in the Shares described herein, other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

F3 · ownership.direct: Management of QVT Family Office Onshore LP ("QVT Onshore") is vested in its general partner, QVT Associates GP LLC, a Delaware limited liability company ("QVT Associates GP"), which may be deemed to beneficially own the Shares held directly by QVT Onshore. QVT Financial LP, a Delaware limited partnership, is the investment manager of QVT Onshore and Saratoga Park Ltd. ("Saratoga"), and shares voting and investment control over the Shares held directly by QVT Onshore and Saratoga. QVT Financial GP LLC ("QVT Financial GP"), a Delaware limited liability company, is the general partner of QVT Financial LP. Daniel Gold is a Managing Member of each of QVT Associates GP and QVT Financial GP, sharing voting and investment control over the Shares held directly by QVT Onshore and Saratoga and may be deemed to beneficially own such Shares.

F2 · ownership.nature: Daniel Gold disclaims any beneficial ownership in the Shares described herein, other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

F3 · ownership.nature: Management of QVT Family Office Onshore LP ("QVT Onshore") is vested in its general partner, QVT Associates GP LLC, a Delaware limited liability company ("QVT Associates GP"), which may be deemed to beneficially own the Shares held directly by QVT Onshore. QVT Financial LP, a Delaware limited partnership, is the investment manager of QVT Onshore and Saratoga Park Ltd. ("Saratoga"), and shares voting and investment control over the Shares held directly by QVT Onshore and Saratoga. QVT Financial GP LLC ("QVT Financial GP"), a Delaware limited liability company, is the general partner of QVT Financial LP. Daniel Gold is a Managing Member of each of QVT Associates GP and QVT Financial GP, sharing voting and investment control over the Shares held directly by QVT Onshore and Saratoga and may be deemed to beneficially own such Shares.

SEC source: 0001209191-22-061468 · doc4.xml · nonDerivative · entry 1

Gold Daniel Allen · CIK 0001832142 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Held by Fourth Avenue FF Opportunities LP - Series E

Disclosed balance after: 6,892,097

F1 · ownership.direct: Management of Fourth Avenue FF-E is vested in its general partner, Fourth Avenue Capital Partners GP LLC, a Delaware limited liability company ("Fourth Avenue GP"), which may be deemed to beneficially own the shares of MP Materials Corp. (the "Issuer") Class A common stock ("Shares") held directly by Fourth Avenue FF-E. Daniel Gold is a Managing Member of Fourth Avenue GP, sharing voting and investment control over the Shares held directly by Fourth Avenue FF-E and may be deemed to beneficially own such Shares.

F2 · ownership.direct: Daniel Gold disclaims any beneficial ownership in the Shares described herein, other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

F1 · ownership.nature: Management of Fourth Avenue FF-E is vested in its general partner, Fourth Avenue Capital Partners GP LLC, a Delaware limited liability company ("Fourth Avenue GP"), which may be deemed to beneficially own the shares of MP Materials Corp. (the "Issuer") Class A common stock ("Shares") held directly by Fourth Avenue FF-E. Daniel Gold is a Managing Member of Fourth Avenue GP, sharing voting and investment control over the Shares held directly by Fourth Avenue FF-E and may be deemed to beneficially own such Shares.

F2 · ownership.nature: Daniel Gold disclaims any beneficial ownership in the Shares described herein, other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001209191-22-057993 · doc4.xml · nonDerivative · entry 2

Corbett Ryan · CIK 0001831686 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 211,476

F3 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 16, 2022.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $31.98 to $32.77, inclusive. The reporting person undertakes to provide to MP Materials Corp., any security holder of MP Materials Corp., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (4) to this Form 4.