POSCO, ReElement Form $200M JV for US Rare Earth Magnet Plant

POSCO Holdings (NYSE: PKX) and ReElement Technologies will build the first integrated rare earth separation and permanent magnet production facility in the United States. The joint venture, announced May 21, calls for $200 million in initial investment.

The target is 3,000 metric tons of annual separation capacity by 2028, doubling to 6,000 tons by 2030. The facility will process both mined and recycled feedstock into magnets for electric vehicles, defense systems, and wind turbines. The companies said the closed-loop design reduces waste and lowers feedstock risk.

China controls more than 90% of global permanent magnet refining. The JV is a direct attempt to break that chokehold on US supply chains. ReElement brings a proprietary purification chemistry. POSCO contributes industrial scale and existing relationships with automakers and defense contractors.

The risk stack is not small. POSCO carries an Alpha Score of 54 out of 100, a mixed grade. The bullish case rests on non-China rare earth demand growing faster than supply. The US government has signaled willingness to fund critical mineral projects through the Defense Production Act and DOE loan programs. POSCO's lithium assets in Argentina and Australia give it a track record in multi-year resource builds.

The JV does not eliminate the structural disadvantages. China's rare earth infrastructure took decades and billions in state subsidies to perfect. The US has no operating rare earth separation plant at commercial scale today. Permitting and construction timelines are uncertain. The 2028 target means capital tied up for years before revenue starts.

ReElement's technology has not been proven at 3,000-ton scale outside of pilot operations. Scaling new chemical separation processes is notoriously difficult. If the purification yield falls short of projections, the economics shift dramatically.

Demand is also a risk. Electric vehicle adoption is slowing in some markets. Permanent magnet prices have softened in 2025 after a post-COVID spike. POSCO is betting that defense and energy storage demand will fill any gap left by EV delays. That is a two-stage wager: first that the plant works, second that the customer base broadens in time.

The modular design helps. The companies plan to build in phases, so a first module could prove the process before committing to full capacity. Site selection is still under way. That flexibility lowers the worst-case capital loss.

The thesis strengthens if POSCO secures a binding offtake agreement from a major US automaker or defense prime before the first module is built. That would lock in revenue visibility and reduce technology risk. Weekly permitting milestones that stay on schedule also support the case. A failed scale-up at the pilot plant, or a policy shift in Washington that cuts critical mineral funding, would break it. China could also dump rare earth oxide on global markets to undercut the new plant's economics before it starts, a tactic Beijing has used repeatedly.

POSCO International, the unit executing the JV, handles cross-border trade and resource logistics. The parent company's core business still depends heavily on steel sales to construction and shipbuilding, which face their own commodities cycle risks. The rare earth bet is a long-term call on diversification, not a near-term earnings driver.

For traders watching PKX, the JV adds optionality but not urgency. The first modular output is four years away. Until then, the stock will move on steel demand, lithium prices, and China trade policy. Site selection is expected to conclude within 12 months.