<SEC-DOCUMENT>0001959173-25-005645.txt : 20250829
<SEC-HEADER>0001959173-25-005645.hdr.sgml : 20250829
<ACCEPTANCE-DATETIME>20250829162043
ACCESSION NUMBER:		0001959173-25-005645
CONFORMED SUBMISSION TYPE:	144
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20250829
DATE AS OF CHANGE:		20250829

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MP Materials Corp. / DE
		CENTRAL INDEX KEY:			0001801368
		STANDARD INDUSTRIAL CLASSIFICATION:	METAL MINING [1000]
		ORGANIZATION NAME:           	01 Energy & Transportation
		EIN:				844465489
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		144
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	001-39277
		FILM NUMBER:		251281191

	BUSINESS ADDRESS:	
		STREET 1:		1700 S. PAVILION CENTER DR.
		STREET 2:		SUITE 800
		CITY:			LAS VEGAS
		STATE:			NV
		ZIP:			89135
		BUSINESS PHONE:		(702) 844-6111

	MAIL ADDRESS:	
		STREET 1:		1700 S. PAVILION CENTER DR.
		STREET 2:		SUITE 800
		CITY:			LAS VEGAS
		STATE:			NV
		ZIP:			89135

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Fortress Value Acquisition Corp.
		DATE OF NAME CHANGE:	20200128

REPORTING-OWNER:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Rosenthal Michael Stuart
		CENTRAL INDEX KEY:			0001832050
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		144

	MAIL ADDRESS:	
		STREET 1:		1700 S. PAVILION CENTER DR.
		STREET 2:		SUITE 800
		CITY:			LAS VEGAS
		STATE:			NV
		ZIP:			89135
</SEC-HEADER>
<DOCUMENT>
<TYPE>144
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
  <headerData>
    <submissionType>144</submissionType>
    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001832050</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0001801368</issuerCik>
      <issuerName>MP Materials Corp. / DE</issuerName>
      <secFileNumber>001-39277</secFileNumber>
      <issuerAddress>
        <com:street1>1700 S. PAVILION CENTER DR.</com:street1>
        <com:street2>SUITE 800</com:street2>
        <com:city>LAS VEGAS</com:city>
        <com:stateOrCountry>NV</com:stateOrCountry>
        <com:zipCode>89135</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>(702) 844-6111</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Rosenthal Michael Stuart</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Officer</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>FIDELITY BROKERAGE SERVICES LLC</name>
        <address>
          <com:street1>245 Summer Street</com:street1>
          <com:city>BOSTON</com:city>
          <com:stateOrCountry>MA</com:stateOrCountry>
          <com:zipCode>02110</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>150000</noOfUnitsSold>
      <aggregateMarketValue>10803255.00</aggregateMarketValue>
      <noOfUnitsOutstanding>177098314</noOfUnitsOutstanding>
      <approxSaleDate>08/29/2025</approxSaleDate>
      <securitiesExchangeName>NYSE</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>03/15/2021</acquiredDate>
      <natureOfAcquisitionTransaction>Stock Award</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>ISSUER</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>1965</amountOfSecuritiesAcquired>
      <paymentDate>03/15/2021</paymentDate>
      <natureOfPayment>Compensation</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>01/14/2022</acquiredDate>
      <natureOfAcquisitionTransaction>Stock Award</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>ISSUER</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>3925</amountOfSecuritiesAcquired>
      <paymentDate>01/14/2022</paymentDate>
      <natureOfPayment>Compensation</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>03/16/2022</acquiredDate>
      <natureOfAcquisitionTransaction>Stock Award</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>ISSUER</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>337</amountOfSecuritiesAcquired>
      <paymentDate>03/16/2022</paymentDate>
      <natureOfPayment>Compensation</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>02/17/2022</acquiredDate>
      <natureOfAcquisitionTransaction>Stock Award</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>ISSUER</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>143773</amountOfSecuritiesAcquired>
      <paymentDate>02/17/2022</paymentDate>
      <natureOfPayment>Compensation</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>08/29/2025</noticeDate>
      <signature>/s/ Jordyn Davis as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Rosenthal Michael Stuart</signature>
    </noticeSignature>
  </formData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
