When the U.S. government wants to stand up a domestic industry, it usually reaches for grants, loan guarantees, or tariffs. The July 2025 deal between MP Materials and the Department of Defense reached for something closer to a balance-sheet takeover: the Pentagon bought $400 million of newly created preferred stock — convertible to roughly 15% of the company on a fully converted basis — set a 10-year floor price of $110 per kilogram on MP's key rare-earth product, and agreed to buy 100% of the magnets that come out of MP's planned Texas campus for a decade. In one stroke, the U.S. military became MP's largest shareholder, its price insurer, and its guaranteed customer.
That package is now the financial spine of '10X', a roughly $1.25 billion rare-earth magnet manufacturing campus MP is building in Northlake, Texas, north of Fort Worth. The bet behind it is blunt: that guaranteed demand and a guaranteed floor can pull an entire supply chain — one China currently controls end to end — onto American soil fast enough to matter for defense, autos, and robotics. The open question, the one every operator and investor should be asking, is what happens to that magnet business when the subsidy tail runs out.
The China problem the deal is built to solve
Neodymium-iron-boron (NdFeB) magnets are the small, unglamorous components that make electric traction motors, missile guidance systems, jet-engine actuators, wind turbines, and industrial robots work. China produces roughly 90% of the world's rare-earth magnet output — on the order of 300,000-plus metric tons of a global total in the low-to-mid 300,000s in 2025 — and is effectively the only country with capability at every stage of the NdFeB supply chain, from separation and metal-making through alloying and sintering. According to the International Energy Agency, that concentration is among the most extreme in any critical-minerals category, and industry supply-chain analysis from PatSnap notes China's full-stack control also gives it export-control leverage over downstream buyers.
For defense and aerospace-grade magnets, China's share runs even higher, because those parts require heavy rare earths — dysprosium and terbium — that keep a magnet from demagnetizing under the heat and mechanical stress inside a jet engine or a missile seeker. There is no commercial-scale substitute. A defense supply-chain analysis from ForcedAlpha estimates that an F-35 production line could halt within roughly six to eleven months if magnet supply were cut. That timeline — measured in months, not years — is the strategic anxiety the MP deal is designed to answer.
Deal anatomy: how each piece de-risks the capex
Standing up magnet manufacturing is capital-intensive and, historically in the U.S., commercially fragile: buyers price against Chinese supply, and Chinese supply has repeatedly proven able to undercut new Western entrants. The DoD structure attacks that risk on three fronts at once.
Equity. The Pentagon's $400 million preferred-stock investment — detailed in MP's SEC Form 8-K exhibit and the company's announcement — converts to roughly 15% of the company. That injects capital without loading the balance sheet with debt service, and it aligns the government with MP's equity outcome rather than just its output.
Price floor. The 10-year, $110-per-kilogram floor on MP's NdPr (neodymium-praseodymium) products, with shared upside participation, removes the single biggest deterrent to Western rare-earth investment: the risk that Beijing floods the market and craters prices below the cost of production. A guaranteed floor lets MP — and its lenders — underwrite the project against a known revenue line rather than a volatile spot price.
Offtake. The Pentagon's commitment to buy 100% of the magnets produced at 10X for a decade eliminates demand risk for the facility's entire initial run. A plant with a pre-sold order book is a fundamentally different financing proposition than one hunting for customers.
Layered on top, MP received a separate $150 million DoD loan tied to adding heavy rare-earth separation at its Mountain Pass, California mine and refinery — a direct move at the dysprosium/terbium chokepoint that matters most for defense-grade parts.
The Apple layer: commercial demand alongside the government backstop
A backstop funded entirely by the Pentagon would leave MP dependent on one buyer. That's part of why the second July 2025 deal matters: Apple and MP announced a roughly $500 million multi-year partnership for U.S.-made magnets built from recycled rare-earth feedstock, including a new recycling line at Mountain Pass that pulls material from end-of-life devices back into the supply chain. As ESG Today reports, magnet shipments under the Apple agreement are expected to begin in 2027.
The strategic value of the Apple deal isn't just its dollar size. It signals that a marquee commercial buyer will pay for domestic, recycled-feedstock magnets — a demand signal independent of the defense mandate, and a proof point that the mine-to-magnet model can serve consumer electronics as well as weapons systems.
Timeline reality check: mind the ramp gap
Here is where enthusiasm needs to meet the construction schedule. The 120-acre 10X campus — developed with Hillwood, the Perot-affiliated developer, and expected to create more than 1,500 manufacturing and engineering jobs per Hillwood — is slated to begin commissioning in 2028, not in 2026. When fully operational, 10X is expected to bring total U.S. NdFeB magnet manufacturing capacity to roughly 10,000 metric tons per year.
Until then, the near-term producer is MP's existing Independence facility in Fort Worth, less than 10 miles from the new site. As the Fort Worth Report notes, Independence reached commercial magnet production in late 2025 at roughly 1,000 tons per year — meaningful, but an order of magnitude below the 10,000-ton target that 10X is meant to unlock. In other words, there is a multi-year ramp gap between the policy announcement and the industrial capacity it promises. During that window, U.S. defense, EV, and robotics buyers remain materially exposed to Chinese supply, whatever the long-term plan says. Site selection was confirmed in February 2026; first magnets from the new campus are years out.
The economics question: does guaranteed offtake mask true cost?
This is the analysis that separates industrial theater from durable industry. A price floor plus a full offtake guarantee is, functionally, a subsidy that shields the producer from the one test that matters in the long run: whether American magnets can clear at a market-competitive cost against Chinese supply.
For the next decade, MP doesn't strictly need to win that test at 10X — the Pentagon is buying the output at a guaranteed floor regardless. That's the point of the backstop, and it's a rational way to buy strategic capacity that the market wouldn't finance on its own. But it also means the deal defers, rather than answers, the competitiveness question. If, when the 10-year floor and offtake commitments lapse, U.S.-made magnets still cost meaningfully more than Chinese equivalents, the country will face a choice it hasn't yet confronted: extend the subsidy indefinitely, absorb higher input costs across defense and autos, or watch domestic capacity struggle against a competitor that has spent decades and enormous scale driving costs down. The build-out is real; the cost curve is the unfinished story.
Risk map for operators and investors
Heavy rare-earth sourcing. The whole edifice still depends on securing dysprosium and terbium at scale. The $150 million Mountain Pass loan targets exactly this, but heavy rare-earth separation is technically demanding and China dominates it even more thoroughly than magnet-making. Feedstock is the constraint that could throttle defense-grade output.
Qualification lead times. Defense-grade magnets aren't drop-in commodities. Qualifying a new magnet source into an F-35 or a missile program takes time and testing — meaning capacity coming online in 2028 doesn't translate to qualified, program-approved parts on the same day. The lag between 'producing magnets' and 'producing magnets a weapons program will accept' is its own schedule risk.
Concentration risk. In solving the China-concentration problem, U.S. policy is creating a domestic concentration problem: a single vertically integrated supplier — MP runs mining and refining at Mountain Pass through metallization, alloying, sintering, finished magnets, and closed-loop recycling — underwritten heavily by one government customer. That's the basis for MP's mine-to-magnet claim, and it's genuinely differentiated. It also means a single company's execution, cost structure, and continuity now carry an outsized share of America's rare-earth magnet independence. Resilience built on one supplier is a different kind of fragility.
The MP–Pentagon partnership is the most aggressive U.S. industrial-policy intervention in rare earths to date, and on strategic logic it's defensible: the alternative is continued dependence on a geopolitical rival for components that can idle a fighter line in under a year. But the guarantees that make 10X financeable are also what obscure whether it can ultimately stand on its own. The Pentagon has bought the country a decade. What the market looks like at the end of it is the part no price floor can guarantee.
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Sources
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MP Materials Announces Transformational Public-Private Partnership with the Department of Defense (MP Materials press release)
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MP Materials execs share next steps for $1.3B Texas rare earth magnet site (Manufacturing Dive)
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MP Materials selects Texas for rare earth magnet manufacturing site (CNBC)
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MP Materials building $1.25B magnet plant just north of Fort Worth (Fort Worth Report)
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MP Materials to build $1.25 billion rare earth magnet factory near Fort Worth (Hillwood)
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MP Materials and Apple Announce $500 Million Partnership to Produce Recycled Rare Earth Magnets (MP Materials press release)
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Apple, MP Materials to Build Rare Earths Recycling Facility Under New $500 Million Supply Deal (ESG Today)
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NdFeB magnet supply chain and China export controls (PatSnap)
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China Rare Earth Dependency — Defense Supply Chain Risk Map (ForcedAlpha)