MP Stock Surges Pre-Market After Striking Rare-Earth Refinery JV In Saudi Arabia 

• Saudi Arabian Mining Company will hold 51% in the JV, while MP Materials and the U.S. DoW together will hold a 49% stake.
• The facility will process rare-earth feedstock from Saudi Arabia, producing significant volumes of separated light and heavy rare-earth oxides.
• MP is also exploring opportunities to support or collaborate on magnet production within Saudi Arabia.

MP Materials Corp. (MP) stock jumped 8.5% in premarket trading on Wednesday after announcing a three-way joint venture with Saudi Arabia’s state-owned miner Maaden and the U.S. Department of War (DoW) to build a major rare-earth refinery in the kingdom

MP stock was among the top-trending tickers on Stocktwits.

What Does The Deal Entail?

Under the agreement, Maaden will hold 51% of the joint venture, while MP Materials and the DoW together will have a 49% stake. The DoW will provide financing for the U.S. portion of the investment, and MP will provide its technical expertise in rare-earth separation, refining, sourcing, and marketing.

The facility will process rare-earth feedstock from Saudi Arabia and other international sources, producing significant volumes of separated light- and heavy-rare-earth oxides. These refined materials will supply manufacturing and defense industries in both the United States and Saudi Arabia and will also be available to allied markets.

MP is also exploring opportunities to support or collaborate on magnet production within Saudi Arabia.

This initiative builds on MP Materials’ multi-billion-dollar public–private partnership with the DoW announced in July 2025. MP is investing over $1 billion and adding more than 1,000 U.S. manufacturing jobs to expand refining and magnet production, including new heavy rare earth capacity at Mountain Pass and a second magnet plant in the country.

How Did Stocktwits Users React?

Retail sentiment on Stocktwits turned 'bullish' from 'neutral' a session earlier. 

Year-to-date, MP shares have surged nearly 300%.

Get updates to this developing story directly on Stocktwits.

Read also: OKLO Stock Gains Pre-Market After Siemens Signs On To Design Key System For Aurora Nuclear Reactor

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