MP Materials Corp. / DE SEC Filing

MP Materials Corp Form 144 notice documents holdings related to a recent insider sale and a performance‑unit vesting.

Rhea-AI Filing Summary

MP Materials Corp Form 144 notice documents holdings related to a recent insider sale and a performance‑unit vesting. The filing shows a Performance Unit Vest on 01/12/2026 for 13,914 units. It reports Elliot Hoops sold 7,823 shares on 01/20/2026 for $533,569.28.

Insights

Corporate Governance Analyst

Routine affiliate sale and vesting disclosed; no material company change.

The filing lists a Performance Unit Vest dated 01/12/2026 for 13,914 units and an affiliate sale of 7,823 shares on 01/20/2026 for $533,569.28. These entries are typical Section 16/Rule 144 disclosures showing compensation vesting and a subsequent disposition.

Cash‑flow treatment and any holding‑period conditions are not shown in the excerpt; subsequent filings or broker reports would show whether these shares were part of a planned sale or routine tax/liquidity management.

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Accepted by SEC EDGAR 03/16/2026 - 04:11 PM EDT Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001862894
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	MP Materials Corp.
SEC File Number	001-39277
Address of Issuer	1700 S. Pavilion Center Drive, Suite 800 Las Vegas NEVADA 89135
Phone	702-844-6111
Name of Person for Whose Account the Securities are To Be Sold	Elliot Hoops
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Merrill 8890 Lyra Dr 5th Floor Columbus OH 43240	13914	835031.53	177230483	03/16/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	01/12/2026	Performance Unit Vest	MP Materials Corp			13914	01/12/2026	NA

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Elliot Hoops 1700 S. Pavilion Center Drive, Suite 800 Las Vegas NV 89135	Common	01/20/2026	7823	533569.28

144: Remarks and Signature

Remarks
Date of Notice	03/16/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	11/20/2025
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	Elliot Hoops
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)