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MP Materials Corp. / DE

For the period ended Dec 31, 2025. Filed Feb 26, 2026.

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A company's yearly report to the SEC, with audited financial statements. It is the fullest account a company gives of its business, its finances and the risks it sees.

FY2025 · Filed Feb 26, 2026

MP$37.75+6.6%Stored close · as of Nov 9, 2026

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Contents

Item 9B. Other Information

Trading Arrangements

During the three months ended December 31, 2025, none of the Company’s directors or officers (as defined in Rule 16a-1(f) of the Exchange Act)adopted, terminated or modified a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement” (as defined in Item 408 of Regulation S-K), except as follows:

On December 16, 2025, Ryan Corbett, the Company’s Chief Financial Officer, adopted a Rule 10b5-1 trading arrangement intended to satisfy the affirmative defense of Rule 10b5-1(c) for the sale of up to 76,000 shares of the Company’s common stock, subject to certain conditions, from March 17, 2026, through October 30, 2026.

On November 20, 2025, Elliot Hoops, the Company’s General Counsel and Secretary, adopted a Rule 10b5-1 trading arrangement intended to satisfy the affirmative defense of Rule 10b5-1(c) for the sale of up to 107,486 shares of the Company’s common stock, subject to certain conditions, from March 16, 2026, through March 31, 2027.

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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.