MP Materials vs USA Rare Earth: Light vs Heavy Rare Earth Divide

The US push to break China's grip on rare earth supply runs through two companies. One already operates a mine and sells magnets. The other is building a mine on a deposit of heavier, scarcer elements that Beijing processes nearly entirely.

The difference in rare earth type drives a gap in strategic importance, operational risk, and market valuation.

China dominates global rare earth production. USA Rare Earth CFO William Steele told investors the country controls "well in excess of 90% of the market, in fact, up to 99% of certain rare earth going forward." The chokehold is even tighter on heavy rare earth elements (HREEs). CEO Barbara Humpton said on a shareholder call in April that dysprosium and terbium "generally represent 20% of global rare-earth volume, but over 90% of the value. And critically, China today processes nearly 100% of these heavy rare-earth."

Heavy rare earths are harder to source, more expensive to process, and critical for the high-performance magnets used in defense, electric vehicles, and wind turbines. Light rare earths such as neodymium and praseodymium are more abundant and cheaper to produce.

MP Materials (NYSE: MP) operates the Mountain Pass mine in California, which produces light rare earths. The company already manufactures magnets at its Fort Worth, Texas, facility and has two foundational customers: Apple and General Motors. MP Materials has started construction on its new "10X" facility in Northlake, Texas, described as a cornerstone of its public-private partnership with the Department of Defense.

USA Rare Earth (NASDAQ: USAR) entered magnet production in the second quarter of this year. It expects first magnet sales by year-end. The company owns 100% of the Round Top deposit in Texas, which is rich in heavy rare earths. Commercial operations at the mine are targeted for late 2028.

The operational gap is reflected in analyst estimates. MP Materials trades at a higher valuation multiple, reflecting its proven production and clearer revenue path. USA Rare Earth trades at a significantly lower multiple, pricing in the uncertainty of ramping HREE magnet production, commissioning Round Top, and developing customer relationships.

Both companies have received substantive US government backing. Both are essential to reducing reliance on Chinese rare earths. But the risk profiles are distinct.

USA Rare Earth faces steeper technical hurdles because heavy rare earths are more difficult to process into magnets. The company is effectively a pre-revenue miner with a magnet pilot. MP Materials already generates revenue and has a timeline to scale.

The contrast between the two stocks illustrates a structural tension in the sector. Light rare earth production is easier but faces more competition from Chinese supply. Heavy rare earth production is harder, more expensive, and strategically critical.

USA Rare Earth's first magnet sales are expected by year-end. MP Materials' 10X facility is slated to begin production in phases starting next year. Those milestones will test whether each company can deliver a domestic rare earth supply chain independent of China.