What each universe represents
stock3d maintains a separately researched universe for each product: 100 public-company listings across eight humanoid component sectors, 54 across nine smart-glasses part sectors plus device makers and platforms, 124 across eight AI-rack part sectors plus rack builders and platforms, and 65 across seven quantum-computer part sectors plus quantum-computer makers and platforms. None is an objectively established ranking by revenue, market share, investment quality or expected returns, and none is exhaustive. Private humanoid developers and public robot OEMs are not comprehensively represented; important private component makers are named but never given a ticker.
A company can appear in more than one sector and in more than one product. Sector and product counts overlap and must not be added together as a total company count. We use one selected listing per represented issuer rather than duplicating its ADR and local shares. A company’s evidence in one product says nothing about its position in another.
Humanoid evidence categories
Humanoid evidence: an explicit humanoid product, development program, application or partnership. This includes early-stage activity and does not establish significant revenue, market share or production volumes.
Robotics products: a documented robotics component or industrial robot application. A humanoid-specific customer or deployment is not established by the cited source.
Upstream enabler: manufacturing infrastructure behind components, such as a semiconductor foundry. This is not direct component design or established humanoid revenue.
Adjacent technology: a relevant component capability whose application to humanoids remains an inference. This classification is not a disclosed supplier relationship.
Smart-glasses evidence categories
Smart-glasses evidence: an explicit smart-glasses product, design-in, supply role, program, application page or partnership, including wrist or ring input sold with glasses. For a device maker it means its own glasses, not a supplier relationship. It does not establish revenue, market share, volumes or future sourcing.
XR products: a documented AR/VR/MR headset, near-eye display or AR-optics product. Smart-glasses adoption is not established by the cited source.
Adjacent technology: a relevant capability, such as a general wearable or mobile part, whose use in smart glasses is an inference. This classification is not a disclosed supplier relationship.
Upstream enabler: materials, substrates, equipment or foundry capacity behind components, such as high-index glass or silicon-carbide wafers for waveguides. This is not a component supplier role or established smart-glasses revenue.
The order of these labels shows how specific the evidence is, not investment quality. The humanoid and smart-glasses labels are separate scales and are not comparable.
How we know
Each smart-glasses listing also shows the basis of its evidence. Teardown-verified: an independent teardown firm names the part in a unit it opened. Disclosed: the company’s own filing, release, product page or investor record. Partner/OEM-disclosed: a named partner’s, licensor’s or device maker’s document. Positioning: a dedicated smart-glasses product, reference design or application page with no named customer.
An analyst’s attribution adds context but cannot set an evidence category on its own. Reported and rumored claims never set an evidence category, a sector membership or a part link. They appear only as labeled caveats or in a watchlist, marked “Reported, unconfirmed” with the outlet and date.
A teardown is an observation of specific units. It shows that a part was present, not its price, volume, exclusivity or use in a later model.
Device makers and private companies
Smart-glasses device makers and platforms form their own sector. Their evidence concerns their own products. A device maker appears under a physical part only when it is separately documented as making that part.
Several important smart-glasses component makers are private, for example Lumus, SCHOTT AG, JBD and Syntiant. We label them “Not publicly listed” and state any relationship with a listed company precisely, such as a licensed manufacturer, a minority investor or an associate. We never present a listed investor or partner as a stand-in for a private company.
AI-rack evidence categories
AI-rack evidence: an explicit AI-server or AI-rack product, design-in, supply role, program, reference design or partnership, such as a part named for rack-scale AI systems or a product sold for AI data centers. For a rack builder it means its own AI servers or racks, not a supplier relationship. It does not establish revenue, market share, volumes or future sourcing.
Data-center products: a documented data-center or server product. Adoption in AI racks is not established by the cited source.
Adjacent technology: a relevant component capability used across electronics, whose use in AI racks is an inference. This classification is not a disclosed supplier relationship.
Upstream enabler: materials, substrates, equipment or foundry capacity behind rack components, such as build-up film for package substrates. This is not a component supplier role or established AI-rack revenue.
The order of these labels shows how specific the evidence is, not investment quality. Each product’s labels form a separate scale, and the scales are not comparable.
How we know: AI server racks
Each AI-rack listing also shows the basis of its evidence. Disclosed: the company’s own filing, release, product page or investor record. Partner-disclosed: a named partner’s, customer’s or platform owner’s document. Teardown-verified: an independent teardown or inspection names the part. Positioning: a dedicated AI-server or AI-data-center product or reference design with no named customer.
An analyst’s attribution adds context but cannot set an evidence category on its own. Reported and rumored claims, including supply-chain reports citing unnamed sources, never set an evidence category, a sector membership or a part link.
Rack builders and private companies
Platform designers, contract manufacturers and server brands that design, build or sell complete AI racks form their own sector. Their evidence concerns their own systems. A builder appears under a physical part only when it is separately documented as making that part.
Several important AI-rack suppliers are private or are subsidiaries of larger groups. We label them “Not publicly listed” and state any relationship with a listed company precisely. We never present a listed investor, parent or partner as a stand-in for a private company.
Quantum-computing evidence categories
Quantum-computing evidence: an explicit quantum-computing product, design-in, supply role, program or partnership, such as a dilution refrigerator, qubit control system or cryogenic component sold for quantum computers, or a named quantum-computer customer. For a quantum-computer maker it means its own machines or processors, not a supplier relationship. It does not establish revenue, market share, volumes or future sourcing.
Lab and test products: a documented cryogenic, vacuum, microwave or test-and-measurement product used in physics labs or electronics test. Adoption in quantum computers is not established by the cited source.
Adjacent technology: a relevant component capability used across electronics or industry, whose use in quantum computers is an inference. This classification is not a disclosed supplier relationship.
Upstream enabler: materials, isotopes, gases, substrates, equipment or foundry capacity behind quantum components, such as industrial helium or high-resistivity silicon wafers. This is not a component supplier role or established quantum revenue.
The order of these labels shows how specific the evidence is, not investment quality. Each product’s labels form a separate scale, and the scales are not comparable.
How we know: quantum computers
Each quantum-computer listing also shows the basis of its evidence. Disclosed: the company’s own filing, release, product page or investor record. Partner-disclosed: a named partner’s, customer’s or quantum-computer maker’s document. Teardown-verified: an independent inspection names the part. Positioning: a dedicated quantum-computing product or reference design with no named customer.
An analyst’s attribution adds context but cannot set an evidence category on its own. Reported and rumored claims never set an evidence category, a sector membership or a part link.
Quantum-computer makers and private companies
Companies that design, build or sell complete quantum computers or quantum-computing platforms form their own sector, in every qubit technology: superconducting circuits, trapped ions, neutral atoms, photons, spins and annealers. Their evidence concerns their own systems. A maker appears under a physical part only when it is separately documented as making that part, such as its own qubit chips.
Many important quantum-hardware suppliers, including most dilution-refrigerator, control-electronics and cryogenic-amplifier specialists, are private or are subsidiaries of larger groups. We label them “Not publicly listed” and state any relationship with a listed company precisely. We never present a listed investor, parent or partner as a stand-in for a private company.
Business mix is a separate question
Specialist, Diversified and Platform describe the breadth or role of the business. They are separate from evidence categories. A specialist can have indirect humanoid exposure, and a diversified company can have an explicit humanoid application.
Companies are grouped by evidence and then alphabetically in research directories. This order is not a financial or performance ranking.
Primary sources and claim boundaries
Research starts with company product pages, technical publications, corporate disclosures and exchange filings. These establish what a source discloses; they do not independently certify its performance claims or production scale.
Company pages retain the specific product role, evidence note, limitation, supporting source and date checked. Where a publication date was not recorded, the review date must not be presented as the document’s publication date.
A named application, development announcement, sampling stage and mass-production contract are different claims. Do not infer unnamed customers, comparative market share or revenue concentration.
Engineering illustrations and their limits
For the humanoid, each of the eight assembly studies identifies an example architecture, its primary engineering sources and alternative designs. Planetary, strain-wave, cycloidal, linear and tendon mechanisms are not interchangeable or universal features of every humanoid.
Each model is a simplified technology illustration, not a manufacturer’s engineering model, a manufacturing drawing, a validated dynamic simulation, a safety design or a verified bill of materials. Tooth profiles, windings, flexures, optics, circuit layouts and dimensions are schematic. Separation controls explain parts; they do not simulate operation.
The smart-glasses model combines features of several products into one binocular display design; no shipping device has exactly this layout. It illustrates an LCoS engine and a diffractive waveguide, while Meta Ray-Ban Display uses a reflective waveguide and microLED and micro-OLED engines are common alternatives. Light paths, gratings and dimensions are exaggerated or estimated for teaching.
The AI-server-rack model combines features of several rack-scale AI systems into one liquid-cooled design with 72 GPUs, a copper cable spine and an in-rack coolant distribution unit; no shipping rack has exactly this layout. Tray counts, dimensions, cable routes and the coolant loop are simplified for teaching, and many sites use in-row or facility-level coolant distribution instead.
The quantum-computer model combines features of several superconducting-qubit systems into one design, drawn with its refrigerator shields cut away; no shipping machine has exactly this layout. Stage temperatures, line counts, dimensions and the gas circuit are simplified for teaching, and trapped-ion, neutral-atom, photonic and spin-qubit machines use different hardware.
The September 19 engineering review corrected the illustrated planetary stage, cell interconnects, winding orientation, bearing raceways, thermal stack and finger pivots. Geometry consistency checks and reference review do not establish a working physical robot or independent professional certification.
Mapping a stock to a component
We distinguish complete systems, integrated products, individual parts, semiconductor support and software. A motor supplier is not automatically a raw-magnet supplier; a processor company is not automatically a memory manufacturer.
Gear architecture matters. The illustrated planetary mechanism is not a strain-wave or cycloidal reducer. Wrist force/torque transducers, inertial units, encoders and tactile sensors are also distinct products.
The current humanoid universe has no verified direct match for the illustrated structural link or tendon cables. Those gaps are visible instead of being filled with loosely related stocks.
In smart glasses, the illustrated grating parts link only to diffractive waveguide makers and the LCoS panel only to LCoS makers; reflective-waveguide manufacturers and micro-OLED makers remain at sector level with an explanation. Of the illustrated glasses parts, 9 have no verified listed supplier, and those gaps are shown.
In the AI server rack, a company is linked to an illustrated part only when a source documents it for that part: a GPU designer is not a memory maker, a cable-assembly maker is not a connector maker, and a rack builder is not a supplier of the parts inside. Of the illustrated rack parts, 1 have no verified listed supplier, and those gaps are shown.
In the quantum computer, a company is linked to an illustrated part only when a source documents it for that part: a cryocooler maker is not a dilution-refrigerator maker, a cable maker is not an amplifier maker, and a quantum-computer maker is not a supplier of the parts inside. Of the illustrated quantum-computer parts, 2 have no verified listed supplier, and those gaps are shown.
US-traded coverage
US mode includes companies with a verified US trading line: a listing in Nasdaq’s exchange directories, or an active depositary receipt in Citi’s directory that also returns a quote. Ordinary-share OTC lines, 144A lines and depositary receipts listed outside the US are not treated as US listings. We never infer a US listing from a company’s home country.
For smart glasses, 36 of 54 companies have a verified US line: 24 on NYSE or Nasdaq and 12 OTC ADRs. Access through an individual broker and quote availability may differ.
For AI server racks, 75 of 124 companies have a verified US line: 56 on NYSE or Nasdaq and 19 OTC ADRs. Access through an individual broker and quote availability may differ.
For quantum computers, 56 of 65 companies have a verified US line: 39 on NYSE or Nasdaq and 17 OTC ADRs. Access through an individual broker and quote availability may differ.
Dates, updates and corrections
Each product has its own research review date, shown on its pages. The humanoid company and component audit was checked on September 17, 2026, the smart-glasses universe on September 23, 2026, the AI-rack universe on September 24, 2026, and the quantum-computing universe on September 28, 2026. Company pages record the date checked for each product separately from Yahoo’s quote time. A price refresh or new website build does not count as a research review.
The maintenance policy is to review material claims monthly or following a relevant disclosure, product launch or teardown, and to revisit each product universe quarterly. These are scheduled responsibilities, not a claim that future reviews have already happened.
Corrections are assessed against primary evidence. Material changes to a company’s role, classification or source should update the relevant record and research change log.
Published by Fynca. Page information dated September 28, 2026.