MP Materials Stock Surges on S&P MidCap 400 Inclusion

Shares of MP Materials, a leading producer of rare earth elements, gained significant momentum following the announcement of its inclusion in the S&P MidCap 400 index. The Las Vegas-based company will join the benchmark on September 22, prompting a 1.2% share price increase to $66.81 accompanied by elevated trading volume exceeding 10.8 million shares.

This development adds to what has already been an extraordinary year for the mining specialist, whose stock has appreciated more than 300% since January.

Strategic Partnerships Fuel Growth

The company’s remarkable transformation began in July with a landmark agreement with the U.S. Department of Defense. The Pentagon invested $400 million in preferred shares, establishing itself as MP Materials’ largest shareholder through this strategic partnership.

A crucial component of this arrangement involves a decade-long price guarantee mechanism, setting the rate for neodymium-praseodymium (NdPr) at $110 per kilogram—approximately double current Chinese market prices. This long-term pricing structure directly addresses the competitive disadvantage Western rare earth producers have faced against market manipulation from China.

Complementing this defense partnership, MP Materials secured a $1 billion financing commitment from JPMorgan Chase and Goldman Sachs to support construction of a second domestic magnet manufacturing facility.

Operational Excellence and Commercial Agreements

The company demonstrated substantial operational improvements in its second quarter 2025 results, achieving record NdPr production of 597 tons—a 119% year-over-year increase. Total rare earth oxide production climbed 45% to 13,145 tons during the same period.

Should investors sell immediately? Or is it worth buying MP Materials?

Concurrently, MP Materials finalized a significant $500 million long-term supply agreement with technology giant Apple. The arrangement will see the iPhone manufacturer sourcing magnets containing 100% recycled rare earth materials—a strategic victory for both corporations.

Key quarterly financial metrics included:
* Revenue growth of 84% to $57.4 million
* Magnetics segment revenue of $19.9 million with adjusted EBITDA of $8.1 million
* Loss per share of 13 cents, outperforming analyst expectations of a 19-cent loss

Analyst Sentiment Turns Positive

Wall Street has taken note of these strategic developments. DA Davidson significantly raised its price target from $32 to $82 while maintaining its buy recommendation. Other financial institutions have established valuation ranges between $44 and $77 per share, reflecting growing confidence in the company’s prospects.

The upcoming index inclusion is expected to generate additional institutional buying pressure as index funds must acquire the stock to mirror the S&P MidCap 400 composition. Given MP Materials’ relatively limited public float, this technical demand could provide further upward momentum for the share price.

As the only major U.S. producer of rare earth elements, MP Materials occupies a central position in America’s supply chain independence initiatives. The company’s early November earnings report will provide crucial insight into whether operational excellence can be maintained alongside ambitious expansion plans.