USA Rare Earth (USAR) Stock on December 4, 2025: New Supply Deal, Stillwater Magnet Plant, and Russell 2000 Inclusion – Is the Mine‑to‑Magnet Bet Worth It?
USA Rare Earth shares rose about 18% to the mid-$16s by mid-day December 4, 2025, after announcing a supply deal between its UK unit Less Common Metals, Solvay, and Arnold Magnetic Technologies. The company, which listed on Nasdaq in March via SPAC, remains pre-revenue and loss-making. USAR’s market cap stands near $2.2 billion. The stock has traded between $5.56 and $43.98 over the past year.