MP Materials (MP) files legal opinion for S-3ASR (File No. 333-285419)

MP Materials Corp. filed a Form 8-K to provide a legal opinion regarding the validity of shares covered by a resale prospectus supplement for its previously filed S-3ASR (File No. 333-285419).

Rhea-AI Filing Summary

MP Materials Corp. filed a Form 8-K to provide a legal opinion regarding the validity of shares covered by a resale prospectus supplement for its previously filed S-3ASR (File No. 333-285419). The legal opinion and the consenting law firm are attached as Exhibit 5.1 and incorporated by reference. The filing notes the opinion is from Skadden, Arps, Slate, Meagher & Flom LLP and includes that firm’s consent. The report references the original S-3ASR filing dated February 28, 2025 and is signed by General Counsel Elliot D. Hoops on August 15, 2025. No financial metrics, transactions, or earnings information are disclosed in this report.

Positive

• Legal opinion attached as Exhibit 5.1 confirming share validity
• Consent provided by Skadden, Arps, Slate, Meagher & Flom LLP
• Incorporation by reference to the previously filed S-3ASR (File No. 333-285419)

Negative

• None.

Insights

Securities Attorney

TL;DR: The company supplied a standard legal opinion and consent supporting resale registration.

The filing attaches a legal opinion from Skadden attesting to the validity of common shares covered by the resale prospectus supplement and includes the counsel's written consent as Exhibit 5.1. This is a routine compliance step when securities are registered for resale under an existing S-3ASR registration statement.

The main dependencies are the scope of the opinion and any qualifications within Exhibit 5.1; investors should note that the 8-K itself does not disclose those opinion details or any new issuance amounts. Expect any material limits or exceptions to appear only within the attached exhibit.

8-K Event Classification

2 items: 8.01, 9.01

2 items

Item 8.01 Other Events Other

Voluntary disclosure of events the company deems important to shareholders but not covered by other items.

Item 9.01 Financial Statements and Exhibits Exhibits

Financial statements, pro forma financial information, or exhibit attachments filed with this report.

FAQ

What did MP Materials (MP) file in this 8-K?

The company filed an 8-K to provide a legal opinion and the consenting counsel's signature regarding the validity of common shares covered by a resale prospectus supplement; the opinion is attached as Exhibit 5.1.

Which law firm provided the legal opinion for MP Materials (MP)?

The legal opinion and consent were provided by Skadden, Arps, Slate, Meagher & Flom LLP.

Does the 8-K disclose any new financial metrics or share issuance amounts?

No. The 8-K contains no financial metrics, no share issuance quantities, and no transaction terms; it only attaches the legal opinion and consent.

What registration statement does the opinion relate to for MP Materials (MP)?

The opinion relates to the resale prospectus supplement for the previously filed S-3ASR, File No. 333-285419, originally filed on February 28, 2025.

When was the 8-K signed and filed?

The filing is signed by General Counsel Elliot D. Hoops and dated August 15, 2025.

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Accepted by SEC EDGAR 08/15/2025 - 05:11 PM Learn about SEC filing dates

MP Materials Corp. / DE false 0001801368 0001801368 2025-08-15 2025-08-15

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): August 15, 2025

MP MATERIALS CORP.

(Exact name of registrant as specified in its charter)

Delaware		001-39277		84-4465489
(State or other jurisdiction of incorporation)		(Commission File Number)		(IRS Employer Identification Number)

1700 S. Pavilion Center Drive, Suite 800 Las Vegas, Nevada 89135		(702) 844-6111
(Address of principal executive offices, including zip code)		(Registrant’s telephone number, including area code)

N/A

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class		Trading Symbol		Name of each exchange on which registered
Common Stock, par value of $0.0001 per share		MP		New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 8.01 Other Events.

On August 15, 2025, as required by the Registration Rights Agreement (as defined below), MP Materials Corp. (the “Company”) filed a prospectus supplement with the Securities and Exchange Commission (the “SEC”) solely to register the potential resale by the United States Department of Defense (the “selling securityholder”) of up to 24,521,672 shares of the Company’s common stock that could be issued to the selling securityholder in the event of a conversion of the preferred stock and/or exercise of the warrant issued to the selling securityholder pursuant to the Subscription Agreement and the Transaction Agreement pursuant to the terms thereof, each as described in the Company’s Current Report on Form 8-K filed with the SEC on July 10, 2025. The foregoing description is qualified in its entirety by the terms of the Registration Rights Agreement, dated as of July 10, 2025 (the “Registration Rights Agreement”), between the Company and the selling securityholder.

The filing of the resale prospectus supplement is not itself a sale of securities by the selling securityholder and does not necessarily mean that the selling securityholder will choose to convert or exercise its existing securities into common stock or to sell any such shares of common stock. If any shares of common stock are sold by the selling securityholder, the Company would not receive any proceeds from that sale. No securities will be issued or sold by the Company pursuant to the resale prospectus supplement.

The resale prospectus supplement was filed pursuant to the Company’s automatic “shelf” Registration Statement on Form S-3ASR (File No. 333-285419), previously filed on February 28, 2025 with the SEC. The Company is filing this current report to provide the legal opinion as to the validity of the shares of common stock covered by the resale prospectus supplement, which opinion is attached hereto as Exhibit 5.1 and is incorporated herein by reference.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

Exhibit Number		Description
5.1		Opinion of Skadden, Arps, Slate, Meagher & Flom LLP
23.1		Consent of Skadden, Arps, Slate, Meagher & Flom LLP (included in Exhibit 5.1)
104		Cover Page Interactive Data File (formatted as inline XBRL).

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: August 15, 2025				MP Materials Corp.
				By:		/s/ Elliot D. Hoops
						Elliot D. Hoops
						General Counsel and Secretary