The Headline Everyone Is Missing

Most coverage of Gina Rinehart's MP Materials investment is framed as a stock tip. Yet the story runs deeper.

A foreign billionaire — Australian, not American — is now the single largest shareholder in the United States' only operational rare earth mine. A mine the Pentagon just injected $400 million into. A mine that is central to America's plan to stop depending on China for the minerals that go into F-35s, Abrams tanks, and guided missiles.

What We Actually Know

Rinehart's investment firm, Hancock Prospecting, owns 8.4% of MP Materials (ticker: MP) as of Q3 2025, according to Bloomberg. That puts her ahead of MP Materials' own founder and CEO, James Litinsky, who holds 7.9%.

She picked up an additional one million shares this quarter alone. Her stake in MP Materials is now worth close to $1 billion and sits at the top of a roughly $3 billion U.S. stock portfolio, per Barchart.

This is not a passive index fund buy. This is a deliberate, concentrated position in a specific strategic asset.

Who Is Gina Rinehart?

Rinehart is 72 years old, worth approximately $32.3 billion — built entirely on iron ore mining in Western Australia. She is also an outspoken Donald Trump supporter and a donor to Australia's center-right political party.

She holds 150,000 shares of Trump Media & Technology Group (Truth Social's parent company), according to the Economic Times citing Bloomberg. That stake has not changed.

Earlier in 2025, she nearly doubled her total U.S. equity holdings to $2.5 billion in Q1, pouring most of the new money into broad index trackers — Nasdaq 100, S&P 500, Dow Jones. She also exited energy stocks entirely, dumping positions in Chevron and ExxonMobil worth a combined $109 million, per the Economic Times.

Rinehart's shift toward defense-adjacent assets suggests a deliberate strategic move.

Why MP Materials Matters

MP Materials operates the Mountain Pass mine in California — the only rare earth mining and processing operation in the United States.

Rare earth elements aren't rare in the ground. They're rare in the supply chain. China controls roughly 60% of global rare earth mining and over 85% of processing capacity, according to the U.S. Geological Survey.

The Pentagon recognizes the vulnerability. In Q4 2025, the Department of Defense locked in a price protection agreement with MP Materials starting October 1. The deal guarantees the company receives at least $110 per kilogram for its rare-earth oxide — whether it sells it or stockpiles it. The current open market price is around $61 per kilogram, per Barchart.

The U.S. government is paying nearly double the market rate to ensure this company stays viable and keeps producing domestically. The rare earth dependency problem is severe.

MP Materials also posted record Q3 production of 721 metric tons of neodymium-praseodymium oxide — up 51% year-over-year — and holds roughly $2 billion in cash against $1 billion in debt. Management projects minimum annual earnings of roughly $650 million once full operations are reached.

What the Coverage Gets Wrong

Financial media is treating this as an investment story. "Should you buy MP stock?" That's only part of it.

The larger question: should a foreign national — even a friendly one — be the top outside shareholder in a Pentagon-backed, strategically critical American defense supply chain asset?

Rinehart is Australian. Australia is a close ally — Five Eyes, AUKUS, the whole deal. This is not a China situation. But the same regulatory framework that would scrutinize a Chinese or even a Saudi investor in this space applies equally to any foreign entity holding the top stake in a company receiving hundreds of millions in U.S. defense dollars.

The Committee on Foreign Investment in the United States (CFIUS) exists for exactly this reason. Whether CFIUS has reviewed or approved Rinehart's growing position has not been reported by Bloomberg, the Economic Times, or Barchart.

The China Angle

The reason MP Materials is getting Pentagon money is because China can — and does — use rare earth exports as economic leverage. Beijing restricted rare earth exports to Japan in 2010 over a territorial dispute. It threatened the same against the U.S. during the first Trump trade war.

Building domestic rare earth capacity is essential to national defense. The magnets in missile guidance systems, radar equipment, and electric motors in military vehicles all require rare earth elements.

If that supply chain runs through China, the U.S. faces a vulnerability. MP Materials is designed to address that. Right now, the biggest outside investor is an Australian mining billionaire who also owns Trump Media stock.

What This Means

Your tax dollars — $400 million of them via the Pentagon deal — are propping up the price floor at MP Materials. That investment could pay off if it means the U.S. isn't scrambling to buy rare earths from Beijing in a crisis.

But the shareholder composition of this strategically critical asset deserves scrutiny. Right now, the largest outside investor is Gina Rinehart. The national security question warrants an answer beyond stock analysis.