Highlights

• Energy Fuels produced 1kg of 99.9% terbium oxide at White Mesa, Utah, demonstrating U.S. capability in heavy rare earth separation—a critical bottleneck China dominates globally.
• Despite technical progress, commercial viability remains unproven: Phase 1 expansion targets 2027, Phase 2 aims for 2029, both conditional on feedstock, permits, and execution.
• The company ended 2025 with strong working capital ($927M) but posted an $85.6M net loss on just $65.9M revenue—financial strength largely reflects debt financing, not operations.

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Energy Fuels has done something worth noticing: it produced pilot-scale terbium oxide in Utah, following earlier dysprosium output. That matters because heavy rare earth separation and refining—not just mining—remains the real bottleneck in any ex-China supply chain. But investors should keep their enthusiasm in check. This is a real technical step, not yet a fully de-risked commercial breakthrough.

Energy Fuels announced (opens in a new tab) on March 25, 2026, that it produced its first 1 kilogram of 99.9% terbium oxide at White Mesa, after previously disclosing nearly 30 kilograms of 99.9% dysprosium oxide. Those are not lab curiosities. Dysprosium and terbium are the heavy rare earths that help permanent magnets survive high-heat, high-performance applications in defense systems, drones, robotics, and electric drivetrains. On that narrow point, the company deserves credit.

"This success proves we can process and produce high-purity 'heavy' rare earth oxides economically and at scale in the U.S.," said Energy Fuels CEO Mark Chalmers. North America will soon have a reliable and secure U.S. commercial source of these vital critical materials, ensuring availability for high-performance magnet and defense technologies. This is just another example of the outstanding team the company has at both the Mill and elsewhere, as the company continues to advance our strategy of becoming a world-significant critical material producer."

For REEx readers, the real lesson is bigger than one kilogram of oxide. Mining is not the chokepoint. Separation and refining are. China still dominates rare earth processing globally, with REEx and other analysts continuing to show overwhelming Chinese control over refining and an even tighter grip on heavy rare-earth supply chains. That makes any credible U.S. separation success important—but also easy to overstate.

Hope & Skepticism

That is where investors should stay skeptical. Management says this proves that heavy rare-earth oxides can be produced “economically and at scale” in the United States. Maybe. But today’s facts are narrower: terbium is being produced at roughly 1 kg per week in a pilot circuit, while the larger commercial buildout is targeted for 2027, and the much bigger Phase 2 expansion for 2029, both subject to approvals, feedstock, and execution. That is progress—but not proof that a Western-heavy rare-earth supply chain is fully bankable.

The financial backdrop reinforces that tension. Energy Fuels ended 2025 with $927.4 million in working capital, but also reported just $65.9 million in revenue and an $85.6 million net loss. The company has capital, but much of its current financial strength reflects the $700 million convertible notes raise, not operating cash flow.

Meanwhile, investors should note—not overreact to—recent insider sales and the added execution complexity from the pending ASM transaction. None of that invalidates the White Mesa progress. It simply means this story remains a midstream buildout thesis, not a finished industrial reality.

REEx Take: A credible U.S. heavy rare earth refining milestone—but still only one step inside a refining world China overwhelmingly controls.

Recap of UUUU

Energy Fuels’ roadmap begins in 2026 as a proof-of-concept year, focused on demonstrating technical capability and locking in feedstock rather than generating meaningful revenue. The company plans to continue pilot-scale production of heavy rare earth oxides—primarily dysprosium and terbium, with samarium, europium, and gadolinium to follow—at modest volumes (roughly ~1 kg/week of terbium).

At the same time, it is working to secure monazite supply from both U.S. sources and allied jurisdictions, including Australia, Madagascar, and Brazil, while preparing the White Mesa Mill to process mixed rare earth concentrates (MREC).

By 2027, the strategy shifts toward a first real commercial step, targeting expanded circuit operations capable of producing approximately 35 tonnes of dysprosium, 12 tonnes of terbium, and 850–1,000 tonnes of NdPr annually from about 10,000 tonnes of monazite feedstock. This phase represents the first meaningful test of U.S. midstream viability—still small in global terms, but strategically significant if executed.

From 2028 onward, the focus turns to scaling and de-risking: optimizing recovery rates, improving cost efficiency, and—most critically—securing consistent feedstock from projects like Donald (Australia), Bahia (Brazil), and Madagascar. This period also includes engineering, permitting, and financing work for a much larger Phase 2 expansion.

By 2029 and beyond, Energy Fuels aims to commission a stand-alone circuit capable of producing over 6,000 tonnes of NdPr and meaningful volumes of heavy rare earths (~288 tonnes Dy, ~80 tonnes Tb annually), positioning the company as a potentially relevant non-China supplier.

Underpinning this multi-year plan is a clear strategy: import and process monazite using White Mesa’s radioactive-material advantage, prioritize midstream separation over mining, and build a Western alternative incrementally. For investors, the takeaway is straightforward—2026–2027 is about proof, 2028 is about execution risk and feedstock validation, and 2029+ is where scale either materializes or falls short. The roadmap is credible, but capital-intensive and highly conditional, with the core bottleneck—reliable feedstock and cost-competitive separation—still unresolved.