Top 10 Rare Earth Mining Companies USA 2026

The rare earth mining companies USA are attracting record government investment in 2026, with Congress, the DoD, and the Department of Commerce channelling billions of dollars into domestic production and processing as China’s export restrictions tighten the global supply chain. This ranking covers the ten most significant operations — from the only fully integrated mine-to-magnet producer in the Western Hemisphere to emerging processors extracting rare earths from recycled feedstocks. For a broader global comparison, see our Top 10 Rare Earth Mining Companies worldwide and our United States rare earth overview.

How We Ranked These Rare Earth Mining Companies USA

Entries are ranked by operational maturity, production scale, confirmed government backing, and project advancement stage. Companies producing or processing rare earths at commercial scale rank above advanced developers with verified financing; those with financing rank above early-stage explorers. The list covers the full value chain — mining, processing, and refining — because domestic US capacity across all three categories is a national security objective in 2026. Production data is sourced from company filings; mineral resource data is cross-referenced against USGS rare earth statistics.

1. MP Materials — Mountain Pass, California (NYSE: MP)

MP Materials operates Mountain Pass, the only commercial-scale rare earth mine in the United States and the largest rare earth producer in the Western Hemisphere. Q1 2026 results confirmed record neodymium-praseodymium output of 917 metric tonnes — up 63% year-on-year — while total REO production reached 12,983 tonnes. Revenue came in at $90.6 million, a 49% year-on-year increase. See our full MP Materials Q1 2026 results analysis.

MP broke ground on its 10X magnetics manufacturing facility in Northlake, Texas in Q1 2026, targeting production of finished NdFeB magnets for the US defence and EV markets. The company’s DoD price protection agreement insulates Mountain Pass revenue against price volatility. Heavy rare earth separation — dysprosium and terbium — is scaling at Mountain Pass alongside the established NdPr stream. Risk: the Northlake facility represents significant capital deployment before magnet revenue materialises.

2. USA Rare Earth — Stillwater, Oklahoma + Round Top, Texas (Nasdaq: USAR)

USA Rare Earth announced on 20 April 2026 a definitive agreement to acquire Serra Verde, the only operating mine outside Asia producing all four magnetic rare earth elements — neodymium, praseodymium, dysprosium, and terbium — at scale. The all-in deal value is approximately $2.8 billion ($300 million cash plus roughly 127 million shares). See our Serra Verde acquisition analysis.

The Stillwater magnet manufacturing facility commissioned Phase 1a in March 2026. The company held $1.75 billion in cash at the end of Q1 2026, with $1.6 billion in Department of Commerce CHIPS funding in final documentation. The Round Top deposit in Texas — now 100% consolidated following the TMRC acquisition — is targeting a definitive feasibility study completion in Q1 2027, with mine commissioning now expected in late 2028. Risk: Serra Verde acquisition closing is subject to regulatory approvals, targeted Q3 2026.

3. Energy Fuels — White Mesa Mill, Utah (NYSE: UUUU)

Energy Fuels processes rare earth oxides at White Mesa Mill in San Juan County, Utah — the only fully licensed and operating conventional uranium and vanadium mill in the United States, repurposed for rare earth separation. NdPr production is at commercial scale. Terbium separation was demonstrated in March 2026. Commercial-scale production of heavy rare earth elements — dysprosium, terbium, and samarium — is targeted for Q4 2026.

Dysprosium oxide produced at White Mesa has been qualified by a South Korean permanent magnet manufacturer, confirming product specification. Energy Fuels announced a proposed acquisition of Australian Strategic Materials (ASM) in 2026, which would add metallisation capability and close the gap between oxide production and finished metal. The White Mesa advantage over greenfield developers is structural: the mill holds existing licences, infrastructure, and an experienced workforce. Risk: feedstock supply — the mill is dependent on monazite imports from mineral sands operations.

4. American Rare Earths — Halleck Creek, Wyoming (ASX: ARR / OTCQX: ARRNF)

American Rare Earths holds the largest known deposit of total contained rare earth oxides in North America at Halleck Creek, Wyoming: a JORC resource of approximately 2.63 billion tonnes at an average grade that supports a potentially very large-scale operation. A Whole of Property Development Assessment — a comprehensive technical and environmental scoping exercise — was awarded to a major engineering firm in April 2026. A pre-feasibility study is targeted for completion in 2026, with a mining permit submission also planned for this year.

The company is listed on the ASX with an OTCQX trading facility for US investors. No production is underway — Halleck Creek is at the pre-feasibility stage. The deposit’s scale is its principal asset; grade and processing characteristics will determine whether it translates into a viable operation. Risk: the step from pre-feasibility to construction financing for a deposit of this scale requires proof of grade consistency and metallurgical performance.

5. Ucore Rare Metals — Alexandria, Louisiana + Bokan, Alaska (TSXV: UCU / OTCQX: UURAF)

Ucore Rare Metals is constructing its Louisiana Strategic Metals Complex (SMC) in Alexandria — a commercial-scale rare earth separation and purification facility designed around its proprietary RapidSX chromatography technology. Installation of RapidSX Machine #1 is targeted for mid-2026. The SMC is targeting 2,000 tonnes per annum of total rare earth oxide initial capacity. Ucore has completed more than 5,700 hours of HREE demonstration processing at its Commercial Demonstration Facility in Kingston, Ontario.

The project holds a $22.4 million US Army funding agreement and has received a Defence Priorities and Allocations System (DPAS) rating applied to purchase orders — a federal designation that prioritises supply chain delivery for national defence. The upstream anchor is the Bokan-Dotson Ridge deposit in southeast Alaska. Risk: RapidSX is a novel separation platform; commercial scale-up from demonstration to full production carries technology execution risk.

6. NioCorp Developments — Elk Creek, Nebraska (Nasdaq: NB)

NioCorp Developments is developing the Elk Creek Critical Minerals Project in southeast Nebraska — an underground mine targeting niobium, scandium, and titanium, with a rare earth oxide stream included in an updated feasibility study expected at mid-year 2026. NioCorp raised more than $370 million in 2025. A $45 million portal engineering package commenced in February 2026 as the first major physical construction step.

The US Export-Import Bank has designated NioCorp’s $780 million loan application as a top priority. Seventy-five percent of projected niobium production is under definitive offtake agreement. A final investment decision on full construction remains pending, targeted for Q2 2026 subject to financing close. Risk: the project’s REE component is secondary to niobium; the rare earth stream value depends heavily on the feasibility study findings and financing structure.

7. Rare Element Resources — Upton, Wyoming (OTCQB: REEMF)

Rare Element Resources commissioned its Demonstration Plant in Upton, Wyoming in late 2025, with the facility ramping through Q1 2026. The plant is designed to produce up to ten tonnes of NdPr oxide at demonstration scale using a proprietary selective mineral extraction process. The Bear Lodge Critical REE Project in northeast Wyoming was accepted as a FAST-41 covered project in March 2026 — a federal designation that provides coordinated permitting across agencies. Bear Lodge holds a high-grade NdPr-dominant resource and has undergone multiple feasibility studies.

Synchron, a General Atomics affiliate, holds approximately 71.4% of the company. Department of Energy cost-share funding has been channelled through General Atomics. The demonstration plant is intended to prove commercial processing economics ahead of a full mine and plant financing decision. Risk: the company’s scale of operations remains at demonstration level; the path to full mine construction requires both permitting completion and financing that is not yet secured.

8. Idaho Strategic Resources — Lemhi Pass, Idaho (NYSE: IDR)

Idaho Strategic Resources describes itself as the largest holder of rare earth element acreage in the United States by landholding, with more than 20,000 acres of prospective ground at Lemhi Pass in central Idaho. Soil sampling and radiometric surveys were completed in 2025. Drone-based magnetic surveys and drill target definition are planned for 2026. No JORC or NI 43-101 resource estimate has been published; the project is at an early exploration stage.

The company’s operating gold production at the Golden Chest Mine in northern Idaho provides a revenue base that distinguishes it from pure exploration plays. Risk: Lemhi Pass has historically attracted interest but no large-scale resource has been delineated; the project faces a long path from current exploration to any production scenario.

9. ReElement Technologies — Fishers and Marion, Indiana (Nasdaq: AREC)

ReElement Technologies, affiliated with American Resources Corporation (Nasdaq: AREC), operates a rare earth and critical mineral refining platform in Fishers, Indiana, with a 400,000 square-foot scaled facility under development in Marion, Indiana. The platform uses chromatography-based separation to produce high-purity rare earth oxides — exceeding 99.99% purity — from recycled feedstocks including end-of-life permanent magnets and coal-based waste streams. ReElement holds a $2 million US Department of Defense contract for domestic rare earth separation capability.

In March 2026, Mitsubishi Materials Corporation took an equity stake in ReElement and announced a strategic collaboration targeting integrated REE refining across the US and Japan. ReElement is a midstream refining operation — it does not mine rare earth ore — but its recycled-feedstock model and growing government and commercial partnerships make it a material part of the US domestic supply chain picture. Risk: ReElement is scaling from demonstration to commercial volume; production figures remain limited in public disclosure.

10. Phoenix Tailings — Exeter, New Hampshire / Massachusetts (Private)

Phoenix Tailings is a privately held cleantech company producing rare earth metals and alloys at facilities in New Hampshire and Massachusetts, using feedstocks sourced from industrial tailings and waste streams rather than primary mining. The company currently produces neodymium-praseodymium, dysprosium, and terbium. In February 2026 it closed a $40.2 million funding round — oversubscribed — bringing total Series B funding to $116.6 million. Investors include Traxys, Eni Next, and Geodesic Alliance Fund.

Traxys North America formalised a preferred trading relationship with Phoenix in February 2026, providing feedstock supply, offtake infrastructure, and logistics support. In May 2026 Phoenix acquired Machinery Partner, adding AI-driven process optimisation capability across its refining operations. The company received $1.6 million in Department of Energy funding in December 2025 for ligand-based extraction technology. Risk: Phoenix is privately held with limited public disclosure on production volumes; its environmental advantage applies to its own refining operations, with upstream feedstock processing remaining a work in progress.

Rare Earth Mining Companies USA — Comparison Table

Outlook for Rare Earth Mining Companies USA in 2026

China’s export restrictions on rare earth elements and processing chemicals, extended through 2025 and 2026, have accelerated federal investment in US domestic supply chain capacity at a pace not seen since the Mountain Pass closure in 2002. The rare earth mining companies USA in this ranking represent the full spectrum from operating mine to early exploration — and the gap between the two ends remains wide. MP Materials and Energy Fuels hold genuine operating assets today. USA Rare Earth, if the Serra Verde acquisition closes as planned, will add the only producing source of all four magnetic rare earths outside Asia to a portfolio that already includes magnet manufacturing and mine development. The next twelve months will determine whether NioCorp’s Elk Creek reaches a final investment decision and whether Ucore’s Louisiana SMC delivers commercial separation volumes — two outcomes that would materially shift the US supply chain balance sheet. Current spot prices for the key elements produced by these companies are tracked on Shanghai Metals Market; for analysis see our neodymium price and dysprosium price pages.

This article is for informational purposes only and does not constitute investment advice. Prices and project statuses are subject to change without notice.