American Resources soared over 13% to its highest in three years after saying it signed a long-term offtake partnership with South Korean steelmaker Posco that includes a joint feedstock task force for sourcing domestic and international rare earth feedstock both recycled and from ore bodies.

The partnership will combine American Resources rare earths subsidiary ReElement's chromatographic separation and purification platform with Posco's extensive relationships throughout the automotive and industrial supply chain while leveraging its expertise in materials science and large-scale industrial deployment.

The companies also said the agreement targets offtake of purified separated rare earth oxides including dysprosium, yttrium, terbium, and neodymium praseodymium in volumes scaling to more than 3,000 metric tons through 2030.

The companies said the collaboration will help reshape the global critical minerals landscape by "localizing innovative refining capacity, reducing reliance on non-domestic processing, and enabling long-term supply security for industries driving economic growth and national security."