MP Materials Corp is the producer of rare earth materials in the Western Hemisphere. The company owns and operates the Mountain Pass Rare Earth Mine and Processing Facility, the only rare earth mining and processing site of scale in North America. The company is also developing a rare earth metal, alloy, and magnet manufacturing facility in Fort Worth, Texas. The company's operations are organized into two reportable segments: Materials and Magnetics.
MP Form 4 activity by transaction type, last 90 days
Form 4 transaction type
Transactions
Shares
Total value
Grant or award
1
740
Tax withholding / forfeiture
1
338
Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.
MP insider transactions (Form 4)
62
55 Form 4 filings on record, the earliest from Oct 1, 2024, newest first. Filing history page 1 of 2.
Footnote F1 (shares): Represents shares withheld to satisfy tax withholding obligations applicable to the vesting of restricted stock units that vested on October 13, 2026.
Footnote F1 (shares): Represents deferred stock units ("DSUs") awarded in connection with the election to defer cash retainers by the reporting person. Each DSU represents a right to receive a share of the registrant's common stock and are fully vested on grant. The DSUs will be settled upon the… Full note on SEC EDGAR
Footnote F1 (shares): Represents deferred stock units ("DSUs") awarded in connection with the election to defer cash retainers by the reporting person. Each DSU represents a right to receive a share of the registrant's common stock and are fully vested on grant. The DSUs will be settled upon the… Full note on SEC EDGAR
Footnote F1 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $71.00 to $71.81. The reporting person undertakes to provide to MP Materials Corp., any security holder of MP Materials Corp., or the staff of the… Full note on SEC EDGAR
Footnote F3 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $70.00 to $70.98. The reporting person undertakes to provide to MP Materials Corp., any security holder of MP Materials Corp., or the staff of the… Full note on SEC EDGAR
Footnote F4 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $68.27 to $69.25. The reporting person undertakes to provide to MP Materials Corp., any security holder of MP Materials Corp., or the staff of the… Full note on SEC EDGAR
Footnote F1 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $66.00 to $66.19. The reporting person undertakes to provide to MP Materials Corp., any security holder of MP Materials Corp., or the staff of the… Full note on SEC EDGAR
Footnote F3 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $65.00 to $65.80. The reporting person undertakes to provide to MP Materials Corp., any security holder of MP Materials Corp., or the staff of the… Full note on SEC EDGAR
Footnote F4 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $68.13 to $68.29. The reporting person undertakes to provide to MP Materials Corp., any security holder of MP Materials Corp., or the staff of the… Full note on SEC EDGAR
Footnote F5 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $67.13 to $68.12. The reporting person undertakes to provide to MP Materials Corp., any security holder of MP Materials Corp., or the staff of the… Full note on SEC EDGAR
Footnote F6 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $66.13 to $67.12. The reporting person undertakes to provide to MP Materials Corp., any security holder of MP Materials Corp., or the staff of the… Full note on SEC EDGAR
Footnote F7 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $65.14 to $66.12. The reporting person undertakes to provide to MP Materials Corp., any security holder of MP Materials Corp., or the staff of the… Full note on SEC EDGAR
Footnote F8 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $64.13 to $65.12. The reporting person undertakes to provide to MP Materials Corp., any security holder of MP Materials Corp., or the staff of the… Full note on SEC EDGAR
Footnote F9 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $65.10 to $65.23. The reporting person undertakes to provide to MP Materials Corp., any security holder of MP Materials Corp., or the staff of the… Full note on SEC EDGAR
Footnote F10 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $64.09 to $65.09. The reporting person undertakes to provide to MP Materials Corp., any security holder of MP Materials Corp., or the staff of the… Full note on SEC EDGAR
Footnote F1 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $67.00 to $67.46. The reporting person undertakes to provide to MP Materials Corp., any security holder of MP Materials Corp., or the staff of the… Full note on SEC EDGAR
Footnote F3 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $65.50 to $65.94. The reporting person undertakes to provide to MP Materials Corp., any security holder of MP Materials Corp., or the staff of the… Full note on SEC EDGAR
Footnote F4 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $65.10 to $65.60. The reporting person undertakes to provide to MP Materials Corp., any security holder of MP Materials Corp., or the staff of the… Full note on SEC EDGAR
Footnote F5 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $64.10 to $65.09. The reporting person undertakes to provide to MP Materials Corp., any security holder of MP Materials Corp., or the staff of the… Full note on SEC EDGAR
Footnote F2 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $75.00 to $75.09. The reporting person undertakes to provide to MP Materials Corp., any security holder of MP Materials Corp., or the staff of the… Full note on SEC EDGAR
Footnote F2 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $64.00 to $64.28. The reporting person undertakes to provide to MP Materials Corp., any security holder of MP Materials Corp., or the staff of the… Full note on SEC EDGAR
Footnote F4 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $64.00 to $64.24. The reporting person undertakes to provide to MP Materials Corp., any security holder of MP Materials Corp., or the staff of the… Full note on SEC EDGAR
Footnote F1 (shares): Represents shares withheld to satisfy tax withholding obligations applicable to the vesting of restricted stock units that vested on April 1, 2026.
Footnote F1 (shares): Represents deferred stock units ("DSUs") awarded in connection with the election to defer cash retainers by the reporting person. Each DSU represents a right to receive a share of the registrant's common stock and are fully vested on grant. The DSUs will be settled upon the… Full note on SEC EDGAR
Footnote F2 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $60.00 to $60.10. The reporting person undertakes to provide to MP Materials Corp., any security holder of MP Materials Corp., or the staff of the… Full note on SEC EDGAR
Footnote F2 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $60.00 to $60.06. The reporting person undertakes to provide to MP Materials Corp., any security holder of MP Materials Corp., or the staff of the… Full note on SEC EDGAR
Footnote F2 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $68.00 to $68.55. The reporting person undertakes to provide to MP Materials Corp., any security holder of MP Materials Corp., or the staff of the… Full note on SEC EDGAR
Footnote F1 (shares): Represents shares withheld to satisfy tax withholding obligations applicable to the vesting of restricted stock units that vested on January 22, 2026.
Footnote F1 (shares): The securities reported are restricted stock units that vest in four annual installments beginning on the first anniversary of the grant date. Each restricted stock unit represents the contingent right to receive, upon vesting of the unit, one share of the issuer's common stock.
Footnote F2 (shares): Represents the number of shares of Common Stock received upon vesting of restricted stock units with performance conditions award previously granted to the reporting person on February 23, 2023. Under the terms of this award, the restricted stock units with performance… Full note on SEC EDGAR
Footnote F3 (shares): Represents shares withheld to satisfy tax withholding obligations applicable to the vesting of restricted stock units with performance conditions that vested on January 12, 2026.
Footnote F4 (shares): Represents shares withheld to satisfy tax withholding obligations applicable to the vesting of restricted stock units that vested on January 12, 2026.
Footnote F5 (shares): Represents shares withheld to satisfy tax withholding obligations applicable to the vesting of restricted stock units that vested on January 13, 2026.
Footnote F6 (shares): Represents shares withheld to satisfy tax withholding obligations applicable to the vesting of restricted stock units that vested on January 14, 2026.
Footnote F1 (shares): The securities reported are restricted stock units that vest in four annual installments beginning on the first anniversary of the grant date. Each restricted stock unit represents the contingent right to receive, upon vesting of the unit, one share of the issuer's common stock.
Footnote F2 (shares): The securities reported are restricted stock units that vested on the date of grant.
Footnote F3 (shares): Represents shares withheld to satisfy tax withholding obligations applicable to the vesting of restricted stock units that vested on January 12, 2026.
Footnote F4 (shares): Represents shares withheld to satisfy tax withholding obligations applicable to the vesting of restricted stock units that vested on January 13, 2026.
Footnote F5 (shares): Represents shares withheld to satisfy tax withholding obligations applicable to the vesting of restricted stock units that vested on January 14, 2026.
Footnote F1 (shares): The securities reported are restricted stock units that vest in four annual installments beginning on the first anniversary of the grant date. Each restricted stock unit represents the contingent right to receive, upon vesting of the unit, one share of the issuer's common stock.
Footnote F2 (shares): Represents the number of shares of Common Stock received upon vesting of restricted stock units with performance conditions award previously granted to the reporting person on February 23, 2023. Under the terms of this award, the restricted stock units with performance… Full note on SEC EDGAR
Footnote F3 (shares): Represents shares withheld to satisfy tax withholding obligations applicable to the vesting of restricted stock units with performance conditions that vested on January 12, 2026.
Footnote F4 (shares): Represents shares withheld to satisfy tax withholding obligations applicable to the vesting of restricted stock units that vested on January 12, 2026.
Footnote F5 (shares): Represents shares withheld to satisfy tax withholding obligations applicable to the vesting of restricted stock units that vested on January 13, 2026.
Footnote F6 (shares): Represents shares withheld to satisfy tax withholding obligations applicable to the vesting of restricted stock units that vested on January 14, 2026.
An insider files Form 144 before selling restricted or control stock. It announces a planned sale. If the sale goes ahead, it shows up later on a Form 4.
MP Materials Corp. / DE (MP) had 2 insider filings in the last 90 days, with the most recent on 2026-10-14. The full record for MP runs to 55 Form 4 filings, the earliest from 2024-10-01. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying MP stock?
No insider purchases of MP were filed in the last 90 days. 2 purchases are on record for this company.
How many insiders are selling MP stock?
No insider sales of MP were filed in the last 90 days. 46 sales are on record for this company.
Where can I see MP SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects MP Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
David Gregory Infuso - Officer
Connie K. Duckworth - Director
Maryanne Lavan - Director
Arnold W. Donald - Director
