Who actually makes the robot

The closest thing to a monopoly on the list. Strain wave gears are the compact, zero-backlash gearboxes inside precision joints, and there is no substitute at volume. The ~85% share claim is consistent with how the market is generally described, and the humanoid order book is real but still small: roughly ¥2.5bn of humanoid-related orders guided for FY3/26, which management has suggested could double or triple in FY3/27.

The catch is that today's profit does not come from humanoids. FY3/26 landed at ¥59.6bn revenue (+7.0%) with operating profit down 94.4% year on year — the stock is priced on FY3/27 guidance of ¥68bn revenue and ¥6.2bn operating profit, not on trailing numbers.

WatchQuarterly humanoid order disclosure. This is the single number that justifies the multiple — and after back-to-back single-session drops of 8.4% (18 Aug) and 4.9% (19 Aug) tied to a broad rates-driven selloff, the stock is down 12.4% in a month and 38.0% off its high. The market is repricing it in real time.

The heavy-duty counterpart: cycloidal RV reducers for medium-to-large joints, with roughly 60% global share. Of the six, this is the one where the cited financials check out cleanly — FY2025 delivered ¥307.9bn revenue (+9.8%) and ¥20.7bn operating profit (+60.3%), with FY2026 guided to ¥327bn and ¥27.7bn.

Crucially, Nabtesco is committing capital ahead of the demand: it is doubling RV-reducer capacity into 2026 and bought Slovak cycloidal maker Spinea in 2023. That is a company acting on the thesis, not just narrating it.

WatchUtilisation of the doubled capacity. Idle new capacity turns a margin story into a fixed-cost problem quickly.

The most concrete commercial traction on the list. Schaeffler signed a strategic partnership with Swiss Hexagon Robotics in April 2026 for strain wave and planetary gear actuators, and a separate technology and supply partnership with UK-based Humanoid. It is also a customer: it plans to deploy at least a thousand Hexagon robots across its own plants within seven years.

The in-house manufacturing point is fair — motors, power electronics and encoders are built internally. The offset is that Schaeffler remains predominantly an automotive supplier, so a humanoid win is diluted by a large, cyclical, structurally pressured base business. That mixed identity shows in the tape: down 14.9% YTD despite being up 42.7% over twelve months, and 38.7% below its high.

One correction worth flagging, because it changes the read. Measured on the thin SFFLY ADR, Schaeffler's correlation to the robotics basket looks like 0.16 — essentially unrelated. Measured on the liquid Xetra line it is 0.61. The ADR was not tracking the company; it was tracking its own illiquidity. Schaeffler belongs firmly inside the robotics bloc.

WatchWhether actuators are ever broken out as a reported segment. Until then the robotics revenue is invisible inside an auto-parts P&L.

The world's largest electric motor maker, building integrated humanoid motion units that fold motor, gearbox and controller together — FLEXWAVE strain-wave reducers, KINEX cycloidal gearboxes and planetary systems shown at Automate 2026. The scale argument is real: roughly ¥2.6 trillion in annual revenue (about $17bn, not $2.6tn as the post's garbled phrasing implies).

This is the one name carrying a governance problem rather than just an execution problem. A third-party committee has been investigating suspected accounting irregularities since September 2025, and Nidec has repeatedly postponed results — including the April–June quarter, delayed again on 5 Aug 2026, with accounting, quality and tariff-underpayment strands all open. The quality strand covers changes to materials, processes and designs made without customer approval, mishandled inspection data and mislabelled production locations, and on 6 August a shareholder formally requested that the company pursue liability against current and former directors. The US ADR has barely traded since February, which is why the Tokyo line is the only usable quote.

WatchPublication of restated accounts. The company's own 5 Aug postponement notice points to its quality investigation concluding "by end of August 2026" — the next concrete date. Until the filings are current, position sizing here is a governance decision, not a robotics one.

One of very few firms that can already supply precision motion at industrial scale, now pointed at humanoids: it acquired 100% of Tokyo Robotics, whose whole-body torque sensing and impedance control fill a genuine capability gap, and ships MOTOMAN Next with NVIDIA GPUs for autonomous control.

But the profit claim in the source post is backwards. For the fiscal year ended February 2026, revenue edged up while operating profit fell more than 5%, with pre-tax and net profit down harder. The growth is in the forecast — FY2/27 guidance of ¥580bn revenue (+7%) and ¥47bn net profit (+33%). Up 61.2% over twelve months but 37.7% below its high after back-to-back drops of 5.5% (18 Aug) and 4.7% (19 Aug), it is the clearest example on this list of a stock priced on guidance rather than results.

WatchFirst-half progress against that +33% net profit guide. It is a forecast-driven multiple with a recent record of missing.

The only US-listed name and the only one with a clean, current, verifiable set of numbers. CV7 launched at CES on 5 January 2026 — an 8K edge AI vision SoC for multi-sensor perception across robotics, drones, industrial automation and automotive. Fiscal 2026 revenue was $390.7m, up 37.2%, with fiscal 2027 growth guided at 10–15%.

The robotics pipeline is disclosed rather than implied: 15+ robotics design wins with lifetime revenue above $100m, and 30+ customers in the pipeline. The honest caveat is that robotics is still the smaller part of a business anchored in security cameras and automotive — and the deceleration from +37% to a guided 10–15% is the number bulls have to explain.

WatchRobotics revenue disclosed as its own line. Ambarella is closest to breaking it out, which would make it the cleanest read on real humanoid volume anywhere on this list.

The only vertically integrated Western play, and the one genuine bridge between "rare earths" and "robot actuators." Q2 2026 revenue of $108.5m (+89%) came with NdPr production of 840 tonnes (+41%) and sales of 1,006 tonnes — more than double the prior year — pushing adjusted EBITDA positive and narrowing the diluted loss to $0.11 from $0.19.

The government backstop is unusually deep: the Department of Defense took $400m of preferred stock in July 2025 to become the largest shareholder, with a ten-year $110/kg NdPr price floor, and has since signed a ten-year offtake for 100% of the output of the planned 10X facility in Northlake, Texas — targeting roughly 10,000 tonnes of annual magnet production by 2028. Beijing noticed: China's Ministry of Commerce added MP to its export-control blacklist in June 2026, and the stock fell nearly 30% through July.

The 13 Aug earnings call surfaced a new line: a multi-year, nine-figure agreement signed in July to supply separated gadolinium oxide to an undisclosed US aerospace and defense manufacturer, recovered as a co-product of the existing Mountain Pass ore stream. Terms are undisclosed so it cannot be sized precisely, but it is the clearest evidence yet that MP is building toward a multi-element refinery rather than a single-product (NdPr) business.

WatchMagnetics segment revenue. At $16.5m against $95.6m from materials it is still the small half of the business — but it is the half that matters for anything robotic, and the only number here that scales with Western magnet independence.

The source post has this one materially wrong. It is not waiting on 2028 — USAR commissioned its Phase 1a commercial magnet line at Stillwater, Oklahoma and began filling customer orders for sintered NdFeB magnets in Q2 2026, pulling its timeline forward by about two years. Phase 1a is guided to a 600 mtpa run-rate by the end of Q4 2026 and 1,200 mtpa combined with Phase 1b in Q1 2027, against roughly 5,000 tonnes at full build.

Q2 2026 revenue was $5.8m against a $10.3m net loss (down from $142.5m a year earlier, when the company had no commercial revenue at all). The balance sheet is the actual headline: $1.53bn of cash at quarter-end, up from $359.9m at year-end 2025. USAR is deploying it into corporate structure as much as capacity — it closed the acquisition of Texas Mineral Resources Corp on 7 Aug, giving it outright ownership of Round Top, and finalized a roughly 13.6% stake in French rare-earth processor Carester. It still holds a definitive agreement to buy Brazil's Serra Verde, the only scaled ex-China producer of all four magnet rare earths, for about $2.8bn, with a shareholder vote on 28 Aug. CEO Barbara Humpton retires 1 October, succeeded by Serra Verde's own CEO, Thras Moraitis — a signal of who is setting the post-merger agenda.

The Round Top deposit in West Texas is the part that is genuinely years out, and the distinction matters: the magnets shipping today are made from purchased feedstock, not from USAR's own mine. Round Top did produce a first dysprosium oxide sample at 99.1% purity in January. Like MP, USAR was added to China's export-control list in June 2026. The stock sits 57.9% below its 52-week high — still the widest drawdown of the robotics-adjacent names, even after rallying 22% in the past month.

WatchTwo dates now, not one: the 600 mtpa run-rate by year-end, and the 28 August vote on Serra Verde — the deal that would turn USAR from a single-site magnet maker into a vertically integrated global rare-earth company overnight, funded by cash rather than dilution.

Operationally the strongest of the five. Lynas posted its best half-year on record in H1 FY26, with Q3 FY26 gross sales of A$265.0m, up 115% year on year, and REO production of 3,233 tonnes against 1,911 a year earlier. More strategically, it became the first commercial producer outside China of separated dysprosium and terbium — first terbium oxide in June 2026, on a heavy rare-earth circuit of about 1,500 tonnes a year.

That heavy-element capability is the real scarcity. Terbium oxide outside China has traded at $4,500–$4,700/kg against under $1,000 domestically, and dysprosium and terbium are what keep magnets stable at motor operating temperatures. The post's claim that Lynas is "now building a US processing facility" is out of date: on 16 March 2026 the US government redirected the US$96m earmarked for the Seadrift, Texas heavy rare-earth plant into a four-year purchase agreement for Lynas product instead, with a US$110/kg NdPr floor. The Texas plant is in limbo, not under construction.

WatchWhether Seadrift is revived or quietly shelved, and the dysprosium/terbium ramp. The heavy circuit is the part China cannot easily replace and the part no one else outside China has.

A well-financed critical-minerals project that has almost nothing to do with robotics. Perpetua secured a $2.9bn EXIM loan, board-approved in May 2026 and expected to become available in the second half of the year, on top of a $255m private placement in October 2025 backed by Agnico Eagle and JPMorgan. Construction at Stibnite in Idaho is underway.

Two caveats the post skips. First, this is predominantly a gold mine: reserves of roughly 4.8 million ounces and about 450,000 ounces of gold a year over the first four years, with antimony supplying an estimated 35% of US demand alongside it. Second, production does not begin until 2029. Antimony goes into flame retardants, ammunition and alloys — not robot joints. It earns its place on a critical-minerals list, not on a robotics one.

This month adds a third caveat. Perpetua rose 38.6% over the past month, but that is a gold trade rather than a critical-minerals one: gold reached roughly $4,490/oz on 19 August, its highest since early June, while antimony went the other way — $51.80/kg on 18 August, down 5.85% year to date and down about 43% from a year earlier. The commodity that earns this name its place on a critical-minerals list is falling while the equity rallies.

WatchFinancial close on the EXIM facility. Approved is not drawn — and with first metal four years out, financing terms matter more than commodity prices here.

The weakest name on either list, and it deserves a plain warning rather than a bullet point. Novonix makes synthetic graphite for battery anodes in Chattanooga, Tennessee — a battery input, not a magnet input, and not part of any robot's bill of materials in the way the tier-one components are.

The financials are severe. FY2025 revenue was $5.62m, down 4%, against a net loss of about US$84.5m, with US$81.3m of cash at 31 December 2025 and trailing free cash flow near −$95m. That is roughly a year of runway against the burn rate. The genuine positive is the US$103m of 48C tax credits certified in April 2026 for the Riverside project — but those vest only when the first 11,000 tpa of capacity is in service before 7 April 2028. The shares are at $0.42, down 89.1% from the 52-week high and 64.9% over a year.

WatchThe next financing. With capacity milestones gating the tax credits and burn outpacing revenue by more than tenfold, dilution or a raise is the base case, and it is the only thing on this list where solvency is the question rather than growth.

The most substantial magnet business you can actually buy. TDK is the largest non-Chinese neodymium magnet manufacturer by revenue and the most globally diversified, producing sintered NdFeB in Japan and China alongside ferrite and metal-powder products. The company's origins are literally magnetic — it was founded in 1935 to commercialise ferrite.

Two honest caveats. Magnets are a modest slice of the group: TDK is dominated by its energy business, including ATL, one of the world's largest lithium battery makers, plus passive components and HDD heads. And its 0.55 correlation to the robotics basket — the highest of any name outside tier one, above every robotics ETF tested — largely reflects its status as a large Japanese electronics exporter moving with the same market, not humanoid demand reaching its P&L. You would be buying a battery-and-components group with a major magnet business attached.

WatchAny segment disclosure sizing magnets against the battery business. Without it, the magnet exposure is real but unmeasurable — the same problem Aichi Steel has, at much larger scale.

The cleanest direct way to own a magnet maker on this list. A Toyota Group company engineering permanent magnets tuned for robotic actuators, with an explicit design goal of reducing dependence on constrained rare earths — the same strategic bet Proterial and Niron are making, but in a listed vehicle.

It is also the steadiest chart in this report: up 21.6% over a year and, even after two straight sessions of broad Tokyo selling, only 11.1% below its 52-week high — still the tightest of any name on this list — at a moment when every tier-one component name is 20–39% below its own. That is partly a virtue and partly a warning — magnets are a modest slice of a diversified steelmaker, so the humanoid narrative barely moves it in either direction.

WatchAny disclosure sizing the magnet business separately from steel. Without it you are buying a steelmaker with a magnet option attached, and the option is not priced because it is not visible.

A real magnet business you cannot buy directly. Arnold makes permanent magnets, precision thin metals and magnetic assemblies to the tolerances robotics OEMs need — and in March 2026 signed a distribution agreement with USA Rare Earth, linking it straight to tier two. But it has been a subsidiary of Compass Diversified since a $130.5m acquisition in 2012, and CODI is the only way in.

That is a poor trade for magnet exposure, and the reason is not subtle. CODI is a diversified holding company whose stock fell 59% in May 2025 when a probe found pervasive accounting fraud at its Lugano Diamonds unit. It restated fiscal 2022–2024, deconsolidated Lugano after a Chapter 11 filing in November 2025, triggered credit-facility defaults requiring forbearance, and suspended its distributions. The stock is up 155.5% year to date because it is recovering from that hole, not because of magnets.

The Q2 2026 call, held 17 Aug, is the freshest read on Arnold specifically. Subsidiary adjusted EBITDA came in at $91.5m (+12.6% year over year), helped by the 1 May sale of the Sterno food-service business, whose proceeds (over $280m) went straight to paying down the senior secured term loan — total debt fell to $1.59bn from $1.89bn at year-end 2025. COO Zach Sawtelle, who succeeds retiring CEO Elias Sabo at the end of 2026, called Arnold's segment "a standout, up nearly 50%," with a strong backlog tied to non-China rare-earth magnet sourcing and progress at a Thailand facility. Management said it is still pursuing further divestitures to cut debt, but did not name Arnold as a candidate — if anything, a segment growing 50% is the one they would want to keep. CODI shares still fell 4.8% on the day.

WatchWhether CODI divests Arnold. Management's 17 Aug commentary points the other way for now — Arnold was singled out as a growth standout, not flagged among the divestiture candidates — but a holding company still repairing its balance sheet post-Lugano remains a seller in waiting.

Not investable, but the most strategically interesting name in this section — because it is trying to make the bottleneck irrelevant rather than relieve it. Niron's iron nitride permanent magnets, out of University of Minnesota research, use no rare earths at all. If they work at scale, the entire NdPr supply argument underpinning tier two weakens.

It just got a serious endorsement: on 7 August 2026 the Department of War's Office of Strategic Capital issued a conditional commitment for a direct loan of up to $150m over 20 years for a 190,000 sq ft plant in Sartell, Minnesota — intended as the world's first full-scale iron nitride production site, targeted at robots, defence systems and electric motors. That is roughly three times the venture capital the company had raised to date, and it arrived four days before this snapshot.

WatchSartell's commissioning, currently pointed at 2027. Track it as a threat to the tier-two thesis rather than as a position — the first credible rare-earth-free magnet at volume reprices every name in that tier downward.

Proterial — formerly Hitachi Metals, a genuine heavyweight in advanced magnetic materials and rare-earth-free development — has not been buyable since October 2022, when a Bain Capital-led consortium completed a roughly $7.5bn take-private and the shares were delisted. It was renamed in January 2023. Any list presenting it as a way to invest in magnets is out of date by nearly four years.

Noveon Magnetics is a private Texas manufacturer producing sintered NdFeB through its EcoFlux recycling process — a closed-loop route that sidesteps mining entirely. It has raised a $75m Series B and is operational, which makes it a real competitor to MP and USAR, just not a tradeable one.

On the Chinese side, the incumbents are what make the ~90% midstream share real. Two names circulating in research summaries, Ningbo Zhanhao and Mainrich Magnets, could not be verified as listed entities and should not be treated as tickers. The clearest listed Chinese pure-play in rare-earth permanent magnets is Ningbo Yunsheng (600366.SS) — A-share access and Chinese policy risk apply, which is much of the reason the West is building alternatives at all.

WatchConsolidation. A Western magnet maker being acquired, floated or spun out is the most likely route by which this layer becomes investable at all — and every name here is a candidate.