USA Rare Earth’s Investment in Carester Reflects a Broader Shift Toward Integrated Supply Chains
For much of the past decade, investment across the battery value chain has focused on securing access to critical minerals. Governments supported domestic mining projects, manufacturers pursued long-term offtake agreements, and companies invested heavily in expanding upstream production of lithium, nickel, cobalt, graphite, and rare earth elements.
Recent developments suggest the industry’s priorities are evolving. While access to raw materials remains essential, companies are increasingly investing in the capabilities that connect extraction with manufacturing. Processing, refining, and recycling are becoming central to long-term supply chain strategy as manufacturers seek greater resilience, traceability, and operational flexibility.
USA Rare Earth’s strategic investment in French rare earth processor Carester illustrates this transition.
A Transatlantic Partnership with Strategic Implications
USA Rare Earth finalized an agreement to acquire a 13.6% ownership stake in Carester alongside French private equity firm InfraVia. The investment supports the expansion of Carester’s rare earth separation and magnet recycling facility in Lacq, France, which is expected to begin operations later this year before full commissioning in 2026.
The significance of the agreement lies in how it connects multiple stages of the supply chain.
USA Rare Earth will gain access to oxide production from the French facility, while Carester will receive feedstock from the Serra Verde rare earth operation in Brazil, which USA Rare Earth agreed to acquire earlier this year. Together with USA Rare Earth’s magnet manufacturing facility in Oklahoma, the partnership links mineral production, advanced processing, and manufacturing across three regions.
The result is a more integrated supply chain rather than a collection of independent assets.
Why Processing Is Moving to the Center of the Value Chain
Several industry developments are increasing the strategic importance of processing capacity.
Diversifying Critical Mineral Supply
Battery manufacturers are expanding sourcing strategies beyond mining by securing access to processing infrastructure that can support more resilient and geographically diverse supply chains.
Connecting Upstream and Downstream Operations
Companies are increasingly investing across mining, refining, processing, manufacturing, and recycling to improve material availability, reduce procurement risk, and strengthen operational coordination.
Expanding Circular Material Recovery
Magnet recycling facilities are becoming an increasingly important source of critical materials, complementing primary mining while improving resource efficiency and long-term supply security.
These developments indicate that competitive advantage is increasingly being built through integrated operations rather than isolated investments.
Implications for the Battery Ecosystem
The impact extends well beyond rare earth producers.
Mining and Raw Materials
Mining companies are looking beyond extraction by forming partnerships that create stronger links with downstream processing and manufacturing.
Processing and Refining
Processing capacity is becoming a strategic capability that supports supply diversification, material security, and long-term industrial growth.
Battery Manufacturing
Integrated supply networks improve visibility into material availability, helping manufacturers strengthen procurement strategies and production planning.
Manufacturing Equipment and Technology
The expansion of processing and recycling facilities is expected to increase demand for advanced separation technologies, automation systems, quality assurance solutions, and digital manufacturing platforms.
Recycling and Circular Economy
Recycling infrastructure is becoming an increasingly important component of critical mineral supply, supporting both material recovery and more resilient value chains.
Questions Executive Teams Should Be Asking
Recent developments raise several strategic questions for leaders across the battery value chain.
Investment Priorities
Should future investment extend beyond mining to include greater ownership of processing and refining capacity?
Supply Chain Strategy
Can cross-border partnerships create stronger and more resilient supply chains than regionally isolated operations?
Value Chain Integration
How can companies better connect mining, processing, manufacturing, and recycling to improve operational performance?
Long-Term Competitiveness
Will access to advanced processing capabilities become as strategically important as access to critical mineral resources?
What Comes Next
As battery demand continues to expand across transportation, energy storage, and advanced manufacturing, companies are reassessing how supply chains are designed.
The USA Rare Earth–Carester partnership reflects a broader transition toward integrated value chains where processing, manufacturing, and recycling are developed alongside resource production. Rather than viewing each stage independently, companies are investing in the connections between them to strengthen resilience and improve long-term competitiveness.
This approach is likely to influence future investment decisions across the battery industry as companies seek greater control over increasingly complex supply networks.
Executive Perspective
Access to critical minerals will remain fundamental to the battery industry, but it is no longer the only determinant of competitive advantage.
The ability to integrate mining, processing, manufacturing, and recycling into a connected supply chain is becoming an equally important strategic capability. USA Rare Earth’s investment in Carester demonstrates how companies are expanding their focus from resource ownership to value chain integration—a direction that is expected to shape the next phase of growth across the global battery industry.
