MP Materials Insider Plans $0.38M Stock Sale via Form 144 Notice

Rhea-AI Filing Summary

MP Materials Corp. (symbol MP) filed a Form 144 indicating that insider Elliot Hoops plans to sell 6,337 common shares, valued at approximately $382,038, through Merrill Lynch on or about 1 Aug 2025. The planned sale represents only 0.0039 % of the company’s 163.46 million shares outstanding and will be executed on the NYSE.

The shares derive from restricted-stock units that vested between 12-14 Jan 2025. During the prior three months, the same insider sold a cumulative 18,499 shares for total gross proceeds of roughly $592,463. No other financial metrics or corporate developments are disclosed in this filing.

Form 144 notices are advance disclosures and do not obligate the seller to complete the trade, but they can provide insight into insider sentiment and potential share-supply pressure.

Positive

• None.

Negative

• Insider plans to sell 6,337 shares (~$0.38 M) after disposing of 18,499 shares in the prior three months, which some investors may view as a negative sentiment signal.

Insights

Securities Analyst

TL;DR: Small insider sale (<0.01 % float); signal mildly negative but immaterial to MP’s overall valuation.

The filing shows Hoops intends to liquidate 6,337 RSU-derived shares worth $0.38 M after selling 18.5 K shares earlier in the quarter. Cumulatively, the insider’s 24.8 K shares equate to less than 0.02 % of shares outstanding, limiting market impact. Still, consecutive sales can be perceived as reduced management conviction, especially if repeated across executives. Investors should monitor additional Form 4 or 144 activity for pattern confirmation; otherwise the event is largely noise versus MP’s $6 B market cap.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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 Stocl	Merrill Lynch, Pierce, Fenner & Smith Inc. 39577 Woodward Ave., Ste 200 Bloomfield Hills MI 48304	6337	382038.11	163456298	08/01/2025	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 Stock	01/12/2025	RSU Vesting	Issuer			2411	01/12/2025	Cash
Common Stock	01/13/2025	RSU Vesting	Issuer			1925	01/13/2025	cash
Common Stock	01/14/2025	RSU Vesting	Issuer			2001	01/14/2025	Cash

* 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 Dr Las Vegas NV 89135	Common	06/12/2025	800	23885.00
Elliot Hoops 1700 S Pavilion Center Dr Las Vegas NV 89135	Common	06/13/2025	5538	165718.52
Elliot Hoops 1700 S Pavilion Center Las Vegas NV 89135	Common	06/26/2025	5523	200650.59
Elliot Hoops 1700 S Pavilion Center Dr Las Vegas NV 89135	Common	07/01/2025	6638	202209.38

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

How many MP Materials shares are being offered in this Form 144?

6,337 common shares are proposed for sale.

What is the approximate value of the planned insider sale?

The aggregate market value is about $382,038 based on the filing.

When is the planned sale date for the MP shares?

The insider targets an 08/01/2025 execution date.

How many shares has the insider sold in the past three months?

A total of 18,499 shares were sold between 12 Jun 2025 and 1 Jul 2025.

What percentage of MP’s outstanding shares does this sale represent?

Approximately 0.0039 % of the 163.46 M shares outstanding.

Where will the transaction be executed?

On the NYSE via Merrill Lynch, Pierce, Fenner & Smith Inc.