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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 (3) to this Form 4."}],"balance_after":193754,"source":{"system":"sec-edgar","filing":"0001209191-21-065866","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1831686/000120919121065866/doc4.xml","form_type":"4"}},{"id":2503722,"issuer":{"id":3549,"kind":"organization","name":"MP Materials Corp. / DE","symbol":"MP"},"owners":[{"id":48924,"kind":"person","name":"Corbett Ryan","position":1,"cik":"0001831686","reported_name":"Corbett Ryan","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2021-11-19T22:07:08.000Z","date":"2021-11-18","kind":"sale","acquired":false,"shares":24066,"price":43.06,"value":1036281.96,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 28, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $42.37 to $43.36, 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 (2) to this Form 4."}],"balance_after":206839,"source":{"system":"sec-edgar","filing":"0001209191-21-065866","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1831686/000120919121065866/doc4.xml","form_type":"4"}},{"id":2503721,"issuer":{"id":3549,"kind":"organization","name":"MP Materials Corp. / DE","symbol":"MP"},"owners":[{"id":48924,"kind":"person","name":"Corbett Ryan","position":1,"cik":"0001831686","reported_name":"Corbett Ryan","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2021-11-19T22:07:08.000Z","date":"2021-11-17","kind":"tax_withholding","acquired":false,"shares":20249,"price":44.62,"value":903510.38,"ownership":{"direct":true},"balance_after":230905,"source":{"system":"sec-edgar","filing":"0001209191-21-065866","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1831686/000120919121065866/doc4.xml","form_type":"4"}},{"id":2656512,"issuer":{"id":3549,"kind":"organization","name":"MP Materials Corp. / DE","symbol":"MP"},"owners":[{"id":48924,"kind":"person","name":"Corbett Ryan","position":1,"cik":"0001831686","reported_name":"Corbett Ryan","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2021-06-24T20:22:59.000Z","date":"2021-06-22","kind":"sale","acquired":false,"shares":11913,"price":32.21,"value":383717.73,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $32.14 to $33.13, 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 (3) to this Form 4."}],"balance_after":251154,"source":{"system":"sec-edgar","filing":"0001209191-21-043018","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1831686/000120919121043018/doc4.xml","form_type":"4"}},{"id":2656511,"issuer":{"id":3549,"kind":"organization","name":"MP Materials Corp. / DE","symbol":"MP"},"owners":[{"id":48924,"kind":"person","name":"Corbett Ryan","position":1,"cik":"0001831686","reported_name":"Corbett Ryan","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2021-06-24T20:22:59.000Z","date":"2021-06-22","kind":"sale","acquired":false,"shares":19815,"price":31.82,"value":630513.3,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $31.14 to $32.13, 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 (2) to this Form 4."}],"balance_after":263067,"source":{"system":"sec-edgar","filing":"0001209191-21-043018","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1831686/000120919121043018/doc4.xml","form_type":"4"}},{"id":2784279,"issuer":{"id":3549,"kind":"organization","name":"MP Materials Corp. / DE","symbol":"MP"},"owners":[{"id":48924,"kind":"person","name":"Corbett Ryan","position":1,"cik":"0001831686","reported_name":"Corbett Ryan","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Class A Common 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