USAR Takes Minority Stakes in Carester, Strengthening European Rare Earth Footprint

What happened

USA Rare Earth has signed definitive agreements to acquire ~13.6% minority stakes in Carester SAS, a French rare earth processor. The deal formalizes a strategic partnership announced in April 2026, giving USAR's LCM Europe and USA Rare Earth access to Carester's rare earth oxides while providing Carester feedstock from Serra Verde and Round Top. Carester's Caremag facility is expected to begin operations in Q4 2026. While this vertical integration fills a midstream gap in Europe, it does not change the fact that USAR still reports no magnet revenue and has not commenced commercial magnet sales. The company remains dependent on converting Stillwater commissioning into recognized revenue and securing CHIPS milestone payments to avoid further dilution.

Implication

The Carester investment secures rare earth oxide supply for USAR's European and future US operations, potentially reducing feedstock risk. However, until the company reports first magnet revenue and a CHIPS disbursement, valuation relies on narrative rather than earnings. We maintain WAIT, with a re-assessment window of 3-6 months.

Thesis delta

The Carester deal adds vertical integration in Europe but does not alter the core thesis: USAR must convert Stillwater commissioning into recognized magnet revenue and obtain actual CHIPS cash disbursements. Without these proofs, the stock price at $20.50 still prices in optimistic assumptions. The thesis remains anchored to near-term execution milestones, not partnership structure.