Capacity tracker

US rare earth capacity tracker: NdPr, heavy rare earths and magnets vs demand

US plants that run today state capacity for about 7,610 t/yr of NdFeB magnets and separate about 3,600 t/yr of NdPr oxide, against 2030 demand of about 38,700 t/yr of magnets and 12,500 t/yr of NdPr oxide. No US plant separates dysprosium or terbium at commercial scale yet; 120 t/yr of dysprosium oxide is under construction.

If every plan were built, magnet capacity would reach about 31,951 t/yr (83% of demand) and NdPr oxide about 10,840 t/yr (87%). Every figure is capacity a company states, not output, and tonnes at different steps are not comparable.

Verified through Oct 1, 2026

Share of 2030 demand

  • NdFeB magnets 20% now83% if all built
  • NdPr oxide 29% now87% if all built
  • Dysprosium oxide 0% now13% if all built

OperatingAll stated plans

Magnets, operating plants
7,610 t/yr20% of 2030 demand; stated, not output
NdPr oxide, operating
3,600 t/yr29% of 2030 demand
Dysprosium oxide, operating
0 t/yr120 t/yr under construction
Magnets if every plan is built
31,951 t/yr83% of 2030 demand
Rows counted
2016 more listed, not added

Capacity against demand

How much rare earth processing and magnet capacity does the US have, and how much is planned?

The US can separate about 3,600 t/yr of NdPr oxide and, by the owners' statements, make about 7,610 t/yr of magnets at plants that run today, which is 29% and 20% of 2030 demand. If every plan were built, NdPr oxide would reach 10,840 t/yr and magnets 31,951 t/yr. Dysprosium oxide is the thinnest: none runs today and all stated plans reach 13% of demand.

NdPr oxide

Tonnes of NdPr oxide per year
Projected NdPr oxide demand in 2030: 12,500
  • Operating nowPlants that run today, at the capacity the owner states 3,600 29% of demand
  • Planned, with a yearAnnounced or financed; the owner gives a year 7,240 58% of demand
  • All stated capacity, if builtOperating, building and planned together 10,840 87% of demand
If every stated date holds: cumulative capacity, tonnes of ndpr oxide per year
ByCapacityShare of 2030 demand
Operating now 3,600 29%
By end of 2027 3,600 29%
By end of 2028 3,600 29%
By 2030 10,840 87%
Including undated plans 10,840 87%

Dysprosium oxide

Tonnes of dysprosium oxide per year
Projected dysprosium demand in 2030, as oxide: 2,181
  • Under constructionConstruction or commissioning under way 120 6% of demand
  • Planned, with a yearAnnounced or financed; the owner gives a year 168 8% of demand
  • All stated capacity, if builtOperating, building and planned together 288 13% of demand
If every stated date holds: cumulative capacity, tonnes of dysprosium oxide per year
ByCapacityShare of 2030 demand
Operating now 0 0%
By end of 2027 120 6%
By end of 2028 120 6%
By 2030 288 13%
Including undated plans 288 13%

Metal and alloy

Tonnes of metal and alloy per year
  • Operating nowPlants that run today, at the capacity the owner states 200
  • Under constructionConstruction or commissioning under way 5,000
  • Planned, no dateAnnounced or financed; no date for the capacity 300
  • All stated capacity, if builtOperating, building and planned together 5,500
If every stated date holds: cumulative capacity, tonnes of metal and alloy per year
ByCapacity
Operating now 200
By end of 2027 200
By end of 2028 5,200
By 2030 5,200
Including undated plans 5,500

NdFeB magnets

Tonnes of magnets per year
Projected US NdFeB magnet demand in 2030: 38,700
  • Operating nowPlants that run today, at the capacity the owner states 7,610 20% of demand
  • Under constructionConstruction or commissioning under way 13,400 35% of demand
  • Planned, with a yearAnnounced or financed; the owner gives a year 941 2% of demand
  • Planned, no dateAnnounced or financed; no date for the capacity 10,000 26% of demand
  • All stated capacity, if builtOperating, building and planned together 31,951 83% of demand
If every stated date holds: cumulative capacity, tonnes of magnets per year
ByCapacityShare of 2030 demand
Operating now 7,610 20%
By end of 2027 8,551 22%
By end of 2028 21,951 57%
By 2030 21,951 57%
Including undated plans 31,951 83%

Demand lines are Department of Energy forecasts (Feb 2022) as converted by the OSTI review, and dysprosium demand is derived from DOE's 1,900 t of embedded dysprosium (about 2,180 t as oxide). Metal and alloy has no published demand figure. The guide on why the US cannot process most of its own rare earths explains the gap.

How much NdPr oxide can the US separate?

The US can separate about 3,600 t/yr of NdPr oxide today, at Mountain Pass (about 2,600) and White Mesa Mill (850 to 1,000), which is 29% of 2030 demand. White Mesa's Phase 2 and the Round Top and Bear Lodge projects would add 7,240 t/yr for 10,840 t/yr, about 87%.

Separation plants and projects: stated capacity for NdPr oxide, with plants that state another unit
PlantStated capacity (t/yr)StatusWhenBasis and notesSource
Mountain Pass separations plantMP Materials, San Bernardino County, CaliforniaAbout 2,600NdPr oxideOperatingNowReported outputMP made 2,599 t of NdPr oxide in 2025 and 917 t and 840 t in Q1 and Q2 2026. The OSTI review puts Mountain Pass and White Mesa together at about 3,600 t/yr, so Mountain Pass is that figure less the 1,000 t/yr at White Mesa. MP says its separations plant ran below design capacity in 2025 and expects full design capacity in Q1 2027; the 10-K gives no tonnage.osti.gov sec.gov mpmaterials.com
White Mesa Mill, Phase 1 circuitEnergy Fuels, Blanding, Utah850 to 1,000NdPr oxideOperatingNowStated capacityCounted at the top of the stated range. No annual output is published: the 2024 commissioning run turned 500 t of monazite into 38 t of NdPr product (company-reported). The circuit shares equipment with uranium milling, so rare earth and uranium runs alternate.sec.gov sec.gov
White Mesa Mill, Phase 2 circuitEnergy Fuels, Blanding, UtahAbout 5,000 moreNdPr oxidePlannedBy mid-2029DerivedThe January 2026 study and the 10-Q give over 6,000 t/yr for the whole mill after Phase 2. This row counts the increase over Phase 1 (6,000 less 1,000), so the mill is not counted twice. Phase 2 is not under construction: the company expects to finish it by mid-2029, subject to licensing, financing, feed and a final investment decision. Capital is about $410M.sec.gov osti.gov
Round Top and Bear Lodge, combinedUSA Rare Earth, Rare Element Resources, Texas and WyomingAbout 2,240NdPr oxidePlannedBy 2030 (OSTI)DerivedThe OSTI review reaches about 10,840 t/yr of NdPr oxide if all four projects run at 100% of design by 2030, against 8,600 t/yr for Mountain Pass and White Mesa at design. This row is the 2,240 t/yr difference. OSTI calls 100% of design within one to two years of start-up unlikely. USA Rare Earth targets first Round Top production in H2 2028 and Bear Lodge permitting is scheduled to finish in Mar 2028.osti.gov
Marion advanced technology centerReElement Technologies, Marion, IndianaOver 16,000 of products across four linesmixed oxides and products (not added)BuildingQ3 2026 to Q1 2027Company targetReleases give three different targets: up to 9,000 t/yr of oxide, over 10,000 t/yr (Jan 2026) and over 16,000 t/yr of aggregate product capacity. The figure counts all products, not NdPr, and no output is published.sec.gov war.gov
Louisiana Strategic Metals ComplexUcore Rare Metals, Alexandria, LouisianaAbout 9,600 of feed at full build; Machine A about 600TREO feed (not added)BuildingMachine A in H1 2027Study designCounts tonnes of rare earth oxide feed at full build (three lines of about 3,000 t/yr plus Machine A), not tonnes of NdPr. A demonstration plant began commissioning in Apr 2026. The sources checked name no commercial offtake customer.newsfilecorp.com
Brook Mine refineryRamaco Resources, Sheridan County, WyomingAbout 3,400 of oxides (2025 assessment)mixed oxides and products (not added)PlannedInitial production 2031 (conceptual study)Study designFluor's 2025 preliminary assessment gave about 3,400 t/yr of oxides from about 5 Mt/yr of coal ore, with output targeted for the second half of 2028. The Jul 2026 conceptual study moved first production to 2031. The figure counts all oxides, not NdPr.sec.gov
Elk Creek (rare earth products)NioCorp, Johnson County, NebraskaAbout 650 on average over 40 yearsNdPr oxide (not added)PlannedNo date; construction target Dec 2026DerivedA long-run average: 25,923 t of NdPr oxide over a 40-year plan, divided by 40. It is not a capacity and no start date is published for rare earth output, so it is not added.sec.gov
Port of Vinton separation facilityAclara Resources, Vinton, LouisianaNot statedmixed oxides and products (not added)PlannedCompletion by end of 2027Company targetA $277M plant to separate heavy and light oxides from mixed carbonate mined in Brazil and Chile, with metals and alloys planned. Capacity is not stated in the sources checked.opportunitylouisiana.gov
Gramercy bauxite residue projectElementUSA, Gramercy, Louisiana150 to 1,000mixed oxides and products (not added)PlannedDemonstration facility construction from mid-2027; first production targeted Q3 2028 (company)Company targetA plant of 150 to 1,000 t/yr of rare earth product from bauxite residue. DOE selected the project for award negotiation in Jun 2026; selection is not an award.minesnewsroom.com
Seadrift plant (planned)Lynas USA, Seadrift, TexasNot statedmixed oxides and products (not added)PlannedNo date; uncertainCompany targetLynas flagged considerable uncertainty about Seadrift in Aug 2025 and says it lacks the funds to complete it beyond the US money received. No decision has been published.miningweekly.com

The first four rows are added into the NdPr oxide total. The rest state feed, mixed products or an average, and are listed so that no plant is missing. OSTI rounds the all-built share to about 86%; the difference is rounding of the 12,500 t demand figure.

Can the US separate dysprosium and terbium?

Not at commercial scale yet. Energy Fuels is building circuits at White Mesa Mill for up to about 120 t/yr of dysprosium oxide and 20 t/yr of terbium oxide, due by the end of 2027. With Phase 2 the stated total is about 288 t/yr of dysprosium oxide and 80 t/yr of terbium oxide, 13% of the dysprosium demand DOE projects.

Heavy rare earth separation: dysprosium and terbium oxide capacity stated by US plants
PlantStated capacity (t/yr)StatusWhenBasis and notesSource
White Mesa Mill, heavy rare earth expansionEnergy Fuels, Blanding, UtahUp to about 120Dy oxideBuildingBy end of 2027Company targetConstruction began on Jul 29, 2026 for about $104M. The dysprosium and terbium circuits are due by the end of 2027, with commissioning as early as Q4 2027; samarium, europium and gadolinium follow by the end of 2028.sec.gov
White Mesa Mill, heavy rare earth expansionEnergy Fuels, Blanding, UtahUp to about 20Tb oxideBuildingBy end of 2027Company targetThe terbium circuit of the same expansion. White Mesa made its first kilogram of terbium oxide at 99.9% purity in Mar 2026.sec.gov
White Mesa Mill, Phase 2 circuitEnergy Fuels, Blanding, UtahAbout 168 moreDy oxidePlannedBy mid-2029DerivedThe 10-Q gives about 288 t/yr of dysprosium oxide for the Phase 1 and Phase 2 circuits together, so this row is 288 less the 120 above. The January 2026 study gave 240 t/yr for Phase 2 alone, which would make the total 360. The row uses the later and lower filing.sec.gov
White Mesa Mill, Phase 2 circuitEnergy Fuels, Blanding, UtahAbout 60 moreTb oxidePlannedBy mid-2029DerivedThe 10-Q gives about 80 t/yr of terbium oxide for both circuits together, so this row is 80 less the 20 above. The January 2026 study gave 66 t/yr for Phase 2 alone.sec.gov
Mountain Pass heavy rare earth circuitMP Materials, San Bernardino County, CaliforniaNot statedDy oxide (not added)BuildingOutput expected later in 2026Company targetThe first heavy rare earth separation circuit was mechanically complete in May 2026. MP expects dysprosium and terbium output later in 2026 and first samarium in 2028. No tonnage is given.mpmaterials.com sec.gov
Elk Creek (rare earth products)NioCorp, Johnson County, NebraskaAbout 66 on average (Tb about 17)Dy oxide (not added)PlannedNo date; construction target Dec 2026DerivedAverages over a 40-year plan (2,649 t of dysprosium oxide and 690 t of terbium oxide), not capacities. Not added.sec.gov

The Phase 2 rows are the increase over the Phase 1 expansion, to match the 10-Q's combined figures of about 288 t/yr of dysprosium oxide and 80 t/yr of terbium oxide. The January 2026 study gave 240 and 66 t/yr for Phase 2 alone. No terbium demand figure is published here, so terbium has no chart.

How much rare earth metal and alloy can the US make?

Plants state only 200 t/yr of metal capacity that is built, at Phoenix Tailings in Exeter, and 5,000 t/yr is under construction at USA Rare Earth's Blacksburg campus. MP Materials, USA Rare Earth at Stillwater and REalloys make metal or alloy but do not state a figure, so the total of 5,500 t/yr is a floor.

Metal and alloy plants: stated capacity and what each does not state
PlantStated capacity (t/yr)StatusWhenBasis and notesSource
Exeter metal refinery (built)Phoenix Tailings, Exeter, New Hampshire200metal and alloyOperatingNowStated capacityCompany-reported: 200 t/yr built. Output and customers are not published.fortune.com globenewswire.com
Blacksburg campus (metal and alloy)USA Rare Earth, Blacksburg, South Carolina5,000metal and alloyBuildingCommissioning 2028Company targetGroundbreaking was on Sept 9, 2026. The same campus is planned for 6,400 t/yr of magnets.foxcarolina.com sec.gov
Exeter metal refinery (capacity not yet built)Phoenix Tailings, Exeter, New Hampshire300 moremetal and alloyPlannedNo dateDerivedThe company says the plant has 500 t/yr of capacity with 200 t/yr built; this row is the 300 t/yr difference.fortune.com globenewswire.com
Independence (NdPr metal)MP Materials, Fort Worth, TexasNot stated separatelymetal and alloy (not added)OperatingSince Jan 2025Stated capacityMP has made NdPr metal at Independence since Jan 2025. Its metal and alloy capacity is not stated apart from the magnet capacity.sec.gov
Stillwater (strip casting and metal)USA Rare Earth, Stillwater, OklahomaNot stated separatelymetal and alloy (not added)OperatingPhase 1a since Mar 2026Stated capacityStrip casting and metal for USA Rare Earth's own magnets; part of the Stillwater magnet figure.sec.gov
Euclid metallization facilityREalloys, Euclid, OhioNot publishedmetal and alloy (not added)OperatingNow (company statement)Stated capacityOperating status and capacity rest on company statements; neither output nor capacity is published.sec.gov
Freedom FacilityPhoenix Tailings, Site not statedNot statedmetal and alloy (not added)PlannedInitial operations 2028Company targetA roughly $1B plant for separation and metallization of light and heavy rare earths, backed by a conditional $500M Office of Strategic Capital commitment (Jun 16, 2026).globenewswire.com
Benson campus (metal)Vulcan Elements, Benson, North CarolinaNot stated separatelymetal and alloy (not added)PlannedNo dateCompany targetThe planned campus is described as making magnets and metal; metal capacity is not stated apart from the 10,000 t/yr of magnets.miningweekly.com

Korean Metals Plant (Energy Fuels, South Korea) is outside the US and is not counted. Metal capacity is not stated apart from magnet capacity at Independence, Stillwater and Benson.

How many rare earth magnets can the US make?

Plants that run today state about 7,610 t/yr: Independence (about 3,000), Sumter (about 2,000), San Marcos (more than 2,000), Stillwater (600), Research Triangle Park (about 10). 10X and Blacksburg under construction add 13,400 t/yr, and Benson and HyProMag USA plan 10,941 t/yr more.

US rare earth magnet plants: stated capacity, status and timing
PlantStated capacity (t/yr)StatusWhenBasis and notesSource
Independence magnet plantMP Materials, Fort Worth, TexasAbout 3,000NdFeB magnetsOperatingProjected; no dateCompany targetThe 10-K says MP committed to expand the plant to a projected 3,000 t/yr of magnets. It began making magnets on commercial equipment in Dec 2025 and has delivered qualification samples to General Motors; commercial shipments are expected in Q4 2026. Output is not published.sec.gov mpmaterials.com
Sumter NdFeB planteVAC Magnetics, Sumter, South CarolinaAbout 2,000NdFeB magnetsOperatingNowStated capacityVAC's release gives about 2,000 t/yr nameplate. Trade press reports the plant was built for 4,000 t/yr with a pathway to 12,000 t/yr; those figures are not counted. Commercial production began in fall 2025 and output is not published.vacuumschmelze.com
San Marcos magnet plantNoveon Magnetics, San Marcos, TexasMore than 2,000 (target)NdFeB magnetsOperatingTarget; no dateCompany targetNoveon says it is scaling beyond 2,000 t/yr (Jan 2026). The row counts 2,000 as the floor of that target. Current output is not published.noveon.co
Stillwater magnet plantUSA Rare Earth, Stillwater, Oklahoma600NdFeB magnetsOperatingRun rate expected by Q4 2026Company targetPhase 1a was commissioned in Mar 2026. 600 t/yr is the run rate the company expects by Q4 2026. USA Rare Earth states 10,000 t/yr for Stillwater and Blacksburg together, which leaves about 3,000 t/yr without its own figure; that part is not counted.sec.gov
Research Triangle Park plantVulcan Elements, Research Triangle Park, North CarolinaAbout 10NdFeB magnetsOperatingNow (Oct 2025)Stated capacityA 21,000 sq ft plant that opened on Mar 31, 2025.manufacturingdive.com
10X magnet campusMP Materials, Northlake, TexasAbout 7,000NdFeB magnetsBuildingCommissioning from 2028Company targetThe 10-K estimates 7,000 t/yr once completed and scaled, and 10,000 t/yr with Independence. The Pentagon buys the output for 10 years.sec.gov mpmaterials.com
Blacksburg campusUSA Rare Earth, Blacksburg, South Carolina6,400NdFeB magnetsBuildingCommissioning 2028Company targetGroundbreaking was on Sept 9, 2026. The campus is also planned for 5,000 t/yr of metal and alloy.foxcarolina.com sec.gov
Benson magnet campusVulcan Elements, Benson, North Carolina10,000NdFeB magnetsPlannedSignificant output by 2027 (company); full capacity undatedCompany targetAbout $918M. The company says a significant share will be online by 2027; no date is published for the full 10,000 t/yr. A conditional $620M Office of Strategic Capital loan commitment to Vulcan was announced in the same month.miningweekly.com
Dallas-Fort Worth recycling and manufacturing hubHyProMag USA, Denton County, TexasAbout 941NdFeB magnetsPlannedCommissioning target mid-2027Study designSintered magnets made from recycled magnet material, from the updated design (the first feasibility study gave about 750 t/yr). Commissioning depends on final permitting and financing.investegate.co.uk
Rochester technology centerArnold Magnetic Technologies, Rochester, New YorkNot statedSmCo magnets (not added)OperatingNowStated capacityArnold fabricates and tests samarium cobalt magnets in Rochester. Its US sintering capacity is not stated, and new SmCo capacity is in Thailand.arnoldmagnetics.com

Independence and Noveon figures are projections and targets, and the Stillwater figure is the run rate expected by Q4 2026. USA Rare Earth states 10,000 t/yr for Stillwater and Blacksburg together; the 3,000 t/yr not given its own figure is not counted. Arnold fabricates samarium cobalt magnets and states no US sintering capacity.

How much magnet recycling capacity does the US have?

Cyclic Materials' Mesa plant can take in up to 25,000 t/yr of end-of-life material, but that is material received, not rare earths recovered, and recovered output is not published. HyProMag USA plans about 941 t/yr of recycled magnets, which is counted in the magnet total.

Recycling plants: material the plant can take in
PlantStated capacity (t/yr)StatusWhenBasis and notesSource
Mesa recycling plantCyclic Materials, Mesa, ArizonaUp to 25,000material taken in (not added)OperatingOpened Sept 9, 2026Stated capacityCounts end-of-life material the plant can take in, not rare earth recovered. More than 7,000 t had arrived by opening, and recovered output is not published.cyclicmaterials.earth

More than 7,000 t of end-of-life material had arrived at Mesa by the opening on Sept 9, 2026. Noveon and MP Materials also use recycled feed; see the recycling guide.

How does this tracker count capacity?

It adds only stated capacity in one unit at a time, counts an increase and not a total twice, labels every figure as output, stated capacity, a company target, a study design or derived, and leaves foreign plants out. The six rules below apply to every row.

  • Stated, not produced

    Capacity is not output

    Almost no company publishes magnet or metal output. MP Materials is the exception for NdPr oxide (2,599 t in 2025). Every other figure is capacity or a target.

  • One unit at a time

    Tonnes are not added across steps

    Feed, mixed products, material taken in and magnets are different quantities. A row in another unit is listed and marked "not added" (16 of 36 rows).

  • No double counting

    Phases carry only the increase

    Where an owner states a total that already includes an earlier phase, as at White Mesa Mill and the Exeter plant, the later row is the difference and its note shows the sum.

  • Labeled basis

    Targets say so

    Each row is reported output, stated capacity, a company target, a study design or derived. A derived row says how in its note.

  • US only

    Foreign plants are left out

    Energy Fuels' Korean Metals Plant (1,300 t/yr of alloy now, 3,600 t/yr targeted by end of 2026), Arnold's Thailand magnet plant and the Serra Verde mine in Brazil are outside the US and are not counted.

  • Forecasts

    Demand is a projection

    The 2030 demand lines are Department of Energy forecasts under aggressive decarbonization scenarios, as cited by the OSTI review. They are not a measure of what buyers will take.

The five bases

Reported output
What the plant produced, used as its current level.
Stated capacity
The capacity the owner states for a plant that exists.
Company target
A capacity the owner has committed to or aims for. Not yet reached.
Study design
The design capacity in a feasibility study or engineering report.
Derived
Computed from stated figures; the note says how.

Where can I download the US rare earth capacity data?

The capacity data is free to download as CSV and JSON, one row per plant or project step, with the unit, status, basis, expected year, note and sources. It has 36 rows, verified through Oct 1, 2026, and may be used with a link back to this page.

Download CSV JSON

The columns in the capacity data download
ColumnWhat it holds
idA stable key for the row.
stepThe step of the chain: separated NdPr oxide, separated dysprosium and terbium oxide, metal and alloy, sintered NdFeB magnets or recycling.
companies, facility, locationThe owners (registry slugs), the plant or project and where it is.
unitWhat the figure counts. Only rows with the same unit are added.
capacity_tonnes_per_year, capacity_as_writtenThe figure as a number (blank when none is stated) and as the source words it.
counted_in_totalstrue when the row is added into its step total.
phaseOperating, under construction or commissioning, or planned.
basisReported output, stated capacity, company target, study design or derived.
year_expected, timingThe year the figure is expected to be in place (blank for operating plants and for plans with no date) and the timing as written.
note, sources, verifiedHow the figure was read, the documents it comes from and the date it was checked.

Where do I read more about US rare earth capacity?

The guides explain each step in the table, the timeline shows when plants are due, and the company lists show who runs each one.

Questions about US rare earth capacity

How much NdPr oxide can the US make?

About 3,600 t/yr at Mountain Pass (about 2,600, MP Materials' 2025 output level) and White Mesa Mill (850 to 1,000), according to the OSTI review. Against about 12,500 t/yr of demand in 2030, that is 29%. Planned expansions would reach 10,840 t/yr, about 87% (the review rounds this to 86%).

How many rare earth magnets can the US make?

Operating plants state about 7,610 t/yr of NdFeB magnet capacity: Independence about 3,000, Sumter about 2,000, San Marcos more than 2,000, Stillwater 600, Research Triangle Park about 10. These are capacity statements and projections, not output, which almost no company publishes. Plants under construction and planned would bring the total to 31,951 t/yr.

Can the US separate dysprosium and terbium?

Not at commercial scale yet. Energy Fuels has made both at pilot scale and is building circuits at White Mesa Mill for up to about 120 t/yr of dysprosium oxide and 20 t/yr of terbium oxide, due by the end of 2027. MP Materials' heavy circuit at Mountain Pass is mechanically complete with no stated capacity.

How big is US rare earth demand in 2030?

The Department of Energy projected about 38,700 t of NdFeB magnet demand in 2030, which the OSTI review converts to about 12,500 t/yr of NdPr oxide, and about 1,900 t of embedded dysprosium, or about 2,180 t as oxide. These are forecasts under aggressive decarbonization scenarios, made in Feb 2022.

Is capacity the same as production?

No. Capacity is what a plant is rated or aiming to make. The OSTI review notes that projects rarely reach 100% of design within one to two years of start-up. Only MP Materials publishes NdPr output (2,599 t in 2025); the other rows are statements, and the page labels each one.

Which US magnet plant is the largest?

By stated capacity, Vulcan Elements' planned Benson campus (10,000 t/yr, no date for full capacity) and MP Materials' 10X campus under construction (7,000 t/yr, commissioning from 2028). Among plants running today, Independence (about 3,000 t/yr, a projection) and Sumter (about 2,000 t/yr nameplate) are the largest.

How current is the tracker?

The figures are verified through Oct 1, 2026. The directory re-verifies facts every quarter, scans for new announcements weekly and corrects errors within 48 hours of a report. The build checks that every plant on the map has a row here.

Sources for the capacity figures

Each profile lists its sources, a confidence grade and a verification date. Order of authority: official records (SEC filings, agency documents), company documents and technical reports, research papers, then independent press. Syndicated copies and reference works are labeled and are never the only source for a number. Company-reported figures are labeled as such, and non-binding deals are labeled "letter of intent" or "conditional".

Tags show what kind of source each link is. How sources are ranked