Maaden MP Materials JV: Inside the High-stakes Saudi Rare Earth Refinery Alliance

The Maaden MP Materials JV is a rare earth refinery joint venture planned for the Kingdom of Saudi Arabia. MP Materials Corp. announced it partnered with the U.S. Department of War (DoW) to establish the strategic joint venture with the Saudi Arabian Mining Company (Maaden), described as Saudi Arabia’s flagship mining company. The agreement is described as binding, and it follows a strategic framework for cooperation on securing critical supply chains reached between the United States and the Kingdom of Saudi Arabia, signed this week in Washington, D.C. The parties position the refinery as a step toward rebalancing the global rare earth supply chain and aligning with U.S. economic and national security interests.

In practical terms, the planned facility is designed to process rare earth feedstock sourced from Saudi Arabia and other global regions. The stated output is “significant quantities” of separated light and heavy rare earth oxides. Those refined products are intended to support U.S. and Saudi manufacturing and defense sectors, and the parties say they will be marketed to allied nations. Multiple reports repeat the same framing: the refinery is meant to advance a stable and secure supply chain for rare earth materials, using Saudi Arabia’s competitive energy base, world-class infrastructure, strategic location, and significant untapped rare earth resource potential.

JV Structure, Control, and Contributions

The ownership and financing structure is explicit. Under the agreement, MP Materials and the DoW (through a joint venture) will hold an equity position targeted at 49% in the joint venture. Maaden will hold a position of no less than 51%. The DoW will provide full financing for the U.S. contribution to the joint venture on a non-recourse basis. MP’s main contribution is its technical expertise in rare earth separation and refining, along with global sourcing and marketing capabilities. The structure is also described as designed to ensure U.S. oversight and alignment with national security objectives.

Operationally, Maaden is described as operating the facility with MP Materials’ industry-leading technical expertise. Reuters also describes MP as signing a binding term sheet with Maaden to develop a rare earth element refining and separation facility in the country, with MP partnered with the DoW to set up the joint venture. Statements from MP’s leadership emphasize that combining MP’s technical expertise, the DoW’s strategic vision, and Maaden’s capabilities and scale is intended to strengthen and diversify the supply chain. Mining.com also notes MP said it is in discussions to support or collaborate on magnet manufacturing in Saudi Arabia.

The JV also sits within a wider cooperation narrative. Global Mining Review reports the broader U.S.-Saudi strategic framework referenced cooperation on securing uranium, metals, permanent magnets, and critical minerals supply chains, signed in Washington, D.C. Mining.com adds that prior to the DoW partnership, MP had signed a memorandum of understanding with Saudi Arabia to develop a rare earths supply chain in the kingdom, from mining to magnet production, signed during the US-Saudi Investment Forum 2025 in Riyadh. Maaden CEO Bob Wilt called the JV “a significant step forward,” citing support from Saudi Arabia’s Ministry of Energy and the Ministry of Industry and Mineral Resources.

For SEO readers tracking what makes this collaboration distinct, the Maaden MP Materials JV combines a Saudi majority position with targeted U.S. participation and DoW-backed, non-recourse financing for the U.S. share. The stated commercial logic is to create a Saudi-based refining and separation hub that can take feedstock from Saudi Arabia and other global regions, then supply separated light and heavy rare earth oxides to manufacturing and defense customers in the U.S. and Saudi Arabia. The parties also signal downstream ambition through discussions around magnet manufacturing in the Kingdom.