The Maaden MP Materials rare earth JV centers on a plan to develop a rare earth element refining and separation facility in Saudi Arabia. MP Materials is partnering with the U.S. Department of War alongside the Saudi Arabian Mining Company (Maaden) under a binding joint venture agreement and term sheet. Multiple sources frame the JV as a pivotal step toward rebalancing the global rare earth supply chain and aligning with U.S. economic and national security interests. The facility is designed to process rare earth feedstock sourced from Saudi Arabia and other global regions. It is also designed to produce significant quantities of separated light and heavy rare earth oxides for downstream use.
Ownership and control are central supply chain implications because they shape governance, oversight, and operating decisions. Reuters reports that MP Materials and the Department of War will hold 49% in the joint venture, while Maaden will hold at least 51%. Mining Technology adds that Maaden will hold no less than 51% and have operating control, while the structure is intended to ensure U.S. oversight and alignment with national security objectives. Reuters also states that full financing for the U.S. contribution to the JV will be provided non-recourse by the Department of War. Together, those terms describe a cross-border facility with majority local operating control and explicit U.S. oversight goals.
The JV is also framed as leveraging Saudi Arabia’s competitive energy base, world-class or advanced infrastructure, and strategic location. The same statements point to significant untapped rare earth resource potential or substantial untapped rare earth resources in the kingdom. In supply chain terms, the partners are positioning the refinery as a node that can accept feedstock from Saudi Arabia and other regions, rather than being tied to a single origin. The refined output is intended to support U.S. and Saudi manufacturing and defense sectors and be marketed to allied nations, which broadens the potential customer base beyond one domestic market.
Supply Chain Rebalancing: Processing Capacity, Security Goals, and China Exposure
Several sources directly connect the Maaden MP Materials rare earth JV to a broader effort to reduce reliance on China for rare earth supply chains. Mining.com describes the JV as building on a multi-billion-dollar public-private partnership announced in July 2025 to bolster America’s rare earth supply chain and reduce reliance on China. That same report states China dominates the market with a 60% share of mine supply and almost all of the processing capacity. It also reports MP plans to invest as much as $1 billion to significantly expand U.S. rare earth refining and magnet manufacturing capacity in the coming years, including a second magnet manufacturing facility in the U.S. and expanded heavy rare earth separation at Mountain Pass.
These context points matter because the Saudi refinery concept targets refining and separation, a chokepoint in many supply chains. MP Materials is described by Investing News as America’s only fully-integrated rare earth producer with capabilities spanning mining and processing to advanced metallization, magnet manufacturing, and recycling. It also states MP operates the world’s second-largest rare earth mine in Mountain Pass, California, and manufactures permanent magnets at its Independence magnetics facility in Texas. In leadership remarks carried across multiple sources, MP CEO James Litinsky says the collaboration combines MP’s technical expertise with the Department of War’s strategic vision and Maaden’s capabilities and scale to strengthen and diversify the supply chain.
The JV’s equity split and China share data help quantify parts of the narrative. The chart below summarizes three percentage figures explicitly stated in the sources: the JV equity shares for Maaden and for the MP Materials plus Department of War side, and China’s share of mine supply as cited by Mining.com. While China’s figure refers to mine supply and the JV figures refer to ownership, all three values share the same unit (percent) and illustrate how the partnership is framed against broader market concentration concerns.
What is the Maaden MP Materials rare earth JV?
Who owns and controls the JV?
How is the U.S. side funded in the joint venture?
What supply chain problem does the JV aim to address?
