MP · CIK 1801368
What MP Materials Corp. told the SEC could break it.
MP Materials' disclosures are dominated by concentration — in customers, in geography, and in the geopolitics of rare earths. Three customers each topped 20% of revenue in 2025 (30%, 23% and 31%), together more than 80%, since rare-earth concentrate demand runs through a limited number of refiners, and essentially all of its mining and processing happens at a single site — Mountain Pass in California, the only at-scale rare-earth facility in the Western Hemisphere, sitting near active earthquake faults. It operates against China's state-consolidated dominance of rare-earth refining and 2025 export and quota controls, having ceased all sales to China in July 2025 to build a domestic alternative — a pivot supported by favorable policy, including the IRA's Section 45X credit equal to 10% of eligible critical-mineral production costs.
4 self-disclosed vulnerabilities, pulled from its own filings — each in the company’s words, with the source. This is the risk register almost nobody reads.
In its own words
What could break it.
Regulatory & policy
- China's state-controlled rare-earth refining dominance + export/import controls and quota systemmedium
Two state-consolidated Chinese rare-earth groups control substantially all of China's concentrate-production and refining quota, and in 2025 China added export/import limitations and quota adjustments — shaping global rare-earth supply and pricing; MP ceased all sales to China in July 2025 to align with its DoW agreements and build a domestic alternative.
“These groups and their affiliates control (and/or allocate to unaffiliated third parties) substantially all of China's quota for concentrate production and rare earth refining.”
- IRA Section 45X advanced-manufacturing production credit (favorable) — 10% of critical-mineral production costs incl. NdPr oxidelow
Favorable policy tailwind: the Inflation Reduction Act's Section 45X Advanced Manufacturing Production Credit grants a credit equal to 10% of eligible production costs for domestically produced critical minerals including NdPr oxide, supporting MP's domestic rare-earth economics (alongside DoW reimbursements and the $110/kg NdPr price floor).
“Specifically, the Section 45X Advanced Manufacturing Production Credit (the “45X Credit”) provides a credit equal to 10% of eligible “production costs incurred” with respect to the production and sale of critical minerals, including NdPr oxide.”
Customer concentration
- three customers each >20% of revenue (Customers A 30%, B 23%, C 31% — anonymized)high
MP's revenue is extremely concentrated: in 2025, anonymized Customers A and B in the Materials segment accounted for 30% and 23% of total revenue, and Customer C (primarily Magnetics) accounted for 31% — three customers together exceeding 80% of revenue, with rare-earth concentrate demand constrained to a limited number of refiners.
“For the year ended December 31, 2025, Customers A and B in the Materials segment accounted for 30 % and 23 % of the Company's total revenue, respectively; Customer C, primarily in the Magnetics segment, accounted for 31 % of the Company's total revenue.”
SEC filing →As of 2026
Geographic concentration
- single-site production — Mountain Pass (CA), only at-scale rare-earth mine/processor in North America, near active faultshigh
Essentially all of MP's rare-earth mining and processing occurs at the single Mountain Pass site in San Bernardino County, California — the only such facility of scale in the Western Hemisphere — which sits near active earthquake faults, creating single-point-of-failure and natural-disaster risk.
“For example, Mountain Pass is located in San Bernardino County, California, near active faults, which could lead to nearby earthquakes.”
SEC filing →As of 2026
The hidden graph
Who it depends on, and who depends on it.
Relationships surfaced from filings — including ones disclosed by the other side, which is how the non-obvious ones come to light.
Its customers
U.S. Department of War (DoW)
“Under the DoW Offtake Agreement, before the Commercial Operation Date, we are entitled to receive reimbursement from the DoW for certain incremental costs incurred by us in connection with engineering, development and start-up of the 10X Facility and for designing magnets to the DoW's specifications (to the extent such costs are not capitalizable as 10X Facility construction costs), with such payments being capped at $30 million in any calendar year.”
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