The humanoid robot sector is moving from prototype to pilot production. If that shift accelerates, it may not just reshape labor economics. It could tighten one of the most supply-constrained and strategically critical materials markets in the world, high-performance neodymium-iron-boron (NdFeB) permanent magnets. As platforms scale, actuator-heavy designs from ABB Ltd. (OTC: ABBNY) and factory integration led by Rockwell Automation (NYSE: ROK) could amplify NdFeB demand, tightening markets already influenced by EVs and wind. The Optimus humanoid program from Tesla (NASDAQ: TSLA) represents a potential demand inflection, while on the supply side, small-cap Harena Resources plc (OTCQB: CRMNF) (LSE: HREE) is advancing one of the few large-scale rare earth projects outside China focused on magnet metals.
The humanoid robot thesis hinges on torque-dense motors that rely on NdFeB permanent magnets, with Neodymium-Praseodymium (NdPr) as the primary rare earth component and Dysprosium-Terbium (DyTb) added to enhance high-temperature performance. This architecture materially increases magnet rare earth intensity per unit. Humanoid platforms are magnet-intensive by design. Morgan Stanley estimates each humanoid may require roughly 1.3 kg of NdPr across motors and actuators1.
Today, EV traction motors and wind turbines dominate NdPr consumption. Robotics remains marginal. But Adamas projects robotics could become the largest NdFeB demand driver by 20402. If annual humanoid volumes reach the hundreds of thousands, incremental demand begins to matter in a market measured in tens of thousands of tonnes annually and one already constrained by geographic concentration and processing bottlenecks. Indeed, Morgan Stanley predicts that the humanoids market could surpass $5 trillion by 20503.
Yet despite growing demand signals from multiple vectors, direct magnet rare earth supply remains structurally tight, creating space for differentiated clay-hosted projects.
Harena Rare Earths (OTCQB: CRMNF) (LSE: HREE) is advancing a large‑scale ionic clay rare earth asset outside China at a time when governments have publicly emphasized the importance of developing alternative rare earth supply chains. The company’s 100%-owned Ampasindava Project in Madagascar hosts a JORC‑compliant 699 million tonne resource4, geologically similar to the southern China clay deposits that historically dominated heavy rare earth supply. Ionic clay systems are attractive because they can offer lower capex and simpler processing compared with hard‑rock deposits, potentially accelerating development timelines. Ampasindava contains a basket of magnet metals such as neodymium, praseodymium, dysprosium, and terbium that are aligned with EVs, defence electronics, wind turbines, and robotics. The completed pre-feasibility study envisions a 20-year operation5. Of this, roughly 1,700 tonnes per year are expected to comprise NdPr and DyTb oxides, meaning magnet rare earths represent 41% of projected production. That mix is notable given the growing focus on high-performance motor applications.
Tesla (NASDAQ: TSLA) entered the humanoid race with its Optimus prototype in 2022, and the program has evolved through multiple prototype iterations toward Gen 3, which the company plans to unveil in Q1 2026. What distinguishes Tesla's approach is manufacturing scale and vertical integration. During its Q4 2025 earnings call, Tesla announced plans to convert space at its Fremont factory into a dedicated Optimus facility, with operations slated to begin before the end of 2026 and a long-term capacity target of 1 million units per year6. This represents a near-term demand vector that moves decisively beyond pilot programs. Each Optimus unit requires dozens of actuators, and CEO Musk has stated that Optimus production is affected by rare-earth magnet supply constraints, implying the use of permanent-magnet motors. If Tesla reaches even conservative early-stage production targets of tens of thousands of units annually by the late 2020s, the company alone could represent measurable incremental NdPr demand measured in tonnes rather than kilograms. More importantly, Tesla's entry validates the humanoid category and may accelerate competing programs from companies like Figure AI, Boston Dynamics, and Chinese manufacturers, multiplying the demand signal. For investors, Tesla's Optimus trajectory functions as a leading indicator of whether humanoid robots transition from research projects to manufactured products at scale.
ABB Ltd. (OTC: ABBNY) is one of the few major industrial robot Original Equipment Manufacturer (OEMs) globally and a direct consumer of NdFeB magnets. ABB serves as a demand barometer rather than a raw materials play. As one of the world’s largest industrial robot manufacturers, its robotics segment order growth and margin trajectory can signal whether robot density is accelerating across manufacturing. More robot units translate into more permanent magnet motors and high-torque joints embedded in shipped hardware7. While ABB’s diversification tempers direct sensitivity to magnet prices, sustained robotics backlog expansion would validate the structural demand thesis. For investors, ABB offers exposure to the application layer where humanoids transition from concept to scaled production without taking commodity price risk directly.
Rockwell Automation (NYSE: ROK) sits deeper in the automation stack, supplying servo drives, motion control systems, and integrated factory architectures. Humanoids deployed in production environments require seamless system-level integration, and that integration embeds permanent magnet motor systems throughout the motion chain. Rockwell’s bookings and automation capex trends can therefore confirm whether robot adoption is broadening beyond pilot programs8. Rockwell provides ecosystem confirmation that actuator intensity per facility is rising. For investors, it functions as a second-layer validation metric: if humanoids scale, system integrators should see the pull-through.
The key question is not whether humanoids eclipse EV demand, but whether they remove slack from an already tight magnet market. If robot volumes approach the hundreds of thousands annually, incremental NdPr demand becomes measurable rather than theoretical. Tesla's Optimus program, ABB's industrial robotics expansion, and Rockwell's automation infrastructure all signal demand acceleration, while Harena is advancing one of the few large-scale projects outside China focused specifically on magnet rare earth production. In that scenario, the strategic positioning of producers capable of delivering magnet-grade rare earths could shift materially as supply elasticity is tested.
Learn More about Harena Rare Earths’ Project and Development Strategy