Reference index — Sector 01: Actuators, reducers, screws, bearings, motors, encoders

Companies the thesis leans on for the actuator/reducer/screw/bearing/motor/encoder chokepoint arithmetic (mainly Part III "Chokepoints" §2 and Part VI "Open Positions"). All figures researched and linked; market caps carry an as-of date. Compiled 2026-07-14.

Harmonic Drive Systems (HDS)

What it is: The Japanese strain-wave (harmonic) reducer incumbent — the single most humanoid-relevant reducer maker in the thesis, since rotary humanoid joints in the 10–100 Nm band are built around strain-wave gears and HDS is the reference supplier the "chokepoint arithmetic" counts against. Status: Public (TSE: 6324; ADR/OTC: HSYDF); moved from the TSE Standard Market to the Prime Market on 27 Feb 2026. Group includes Harmonic Drive LLC (US, Beverly/Peabody, Massachusetts) and Harmonic Drive SE (Germany). Market cap / valuation: ¥685.4B (~US$4.4B) as of 2026-07-14 (stockanalysis.com quote page for TYO:6324). Latest financials: FY ended 31 Mar 2026 (FY2026): revenue ¥59,557M (+7.0% YoY); operating profit ¥2,567M; net profit attributable to owners ¥1,608M (−53.7% YoY, i.e. margin compression even as robot demand grew); EPS ¥16.99; equity ratio 72.2%. FY2027 guidance: revenue ¥68,000M (+14.2%), operating profit ¥6,200M (+141.5%), net profit ¥4,500M (+179.7%). Cited for: "Harmonic Drive Systems dominates strain-wave — ~80% of the global harmonic market" and "FY2026 humanoid volumes still ramping … expects considerable volume from FY2027" (III.2; ARGUMENT §2(a), §4 tables, and the "strain-wave to tolerance … ~two deep" supplier-depth line). Also VI: "Harmonic Drive's US HQ (Beverly MA) and Peabody manufacturing — incumbents adding capacity only, not a de-novo crash program." Note: the ~80% share figure is trade-press/industry-tracker, not a company disclosure; HDS's own FY2027 guidance (+179.7% net profit) is the auditable version of the "considerable volume from FY2027" claim. Links:

Leaderdrive (Leader Harmonious Drive Systems) — 苏州绿的谐波传动科技

What it is: China's largest harmonic (strain-wave) reducer maker and the climbing challenger to Harmonic Drive Systems; the company whose capacity and price curve carries the thesis's "Chinese overcapacity dissolves the chokepoint" steelman. Important: this is the *same legal entity* as "Suzhou Green Harmonic" — Leaderdrive's Chinese name is 苏州绿的谐波传动科技股份有限公司 (Suzhou Green Harmonic Drive Technology Co.). The thesis currently treats them as two separate companies. Status: Public (SSE STAR Market: 688017.SS). Founded/chaired by Zuo Yuyu, with brother Zuo Jing as vice-chairman. Market cap / valuation: ¥70.92B CNY (~US$9.9B) as of 2026-07-14 (stockanalysis.com, SHA:688017) — i.e. the Chinese challenger now trades at roughly twice the market cap of the Japanese incumbent it is chasing. Shares up ~221% YoY; at a ¥203.8 close in April 2026 each founding brother's stake was worth ~US$1B (Forbes). Latest financials: FY2025 (calendar year): revenue ¥570.71M (+47.3% YoY); net profit ¥124.37M (+121.4%, i.e. more than doubled). TTM as of Jul 2026: revenue ¥612.8M (+51.9%), net income ¥136.8M (+142.9%). Cited for: III.2 / ARGUMENT §2(a): "China's largest harmonic-reducer maker, Leaderdrive, posted 2025 revenue of ¥570.7M (+47% YoY) and net profit of ¥124.4M (more than doubled)"; "new fundraising round explicitly sized to add capacity for one million harmonic reducers a year"; "real domestic harmonic share ~26–40%, not the 2017 '90%'"; "capacity ~50k units/month Q1 2026 → 100–120k/month targeted year-end 2026." Verified: J.P. Morgan puts its share of China's harmonic reducer market at 30–40% (humanoid.guide); RobotScope puts 2024 domestic share at ~25% and global ~12% (with Harmonic Drive Systems >60% global) — so the "~26–40% domestic" range in the ledger is defensible and the "90%" is definitively retired. The 1M-unit capacity figure traces to the ¥1.4B private placement for the "new-generation precision transmission intelligent manufacturing project" (adding 1M harmonic reducers/yr + 200k actuators/yr); 2025 shipments were ~425–500k units, with ~1M/yr targeted for 2026 and ~300k/yr earmarked for humanoids. Customers named: Unitree, AgiBot, major industrial-robot OEMs. Links:

Suzhou Green Harmonic Drive (苏州绿的谐波) — SAME COMPANY AS LEADERDRIVE

What it is: Not a separate firm. "Suzhou Green Harmonic Transmission Technology" is the literal translation of 苏州绿的谐波传动科技股份有限公司, whose English trading name is Leaderdrive / Leader Harmonious Drive Systems, listed as 688017.SS. The thesis lists the two names as distinct Chinese entrants (III.2 bullet "Other Chinese entrants: Shenzhen Han's Motion, Suzhou Green Harmonic Transmission Technology" and ARGUMENT §2(a) claim 6, which double-counts it against Leaderdrive in the same paragraph). Status: Public (SSE STAR: 688017.SS) — see Leaderdrive entry above. Market cap / valuation: ¥70.92B CNY (~US$9.9B) as of 2026-07-14 — the same listing. Latest financials: FY2025 revenue ¥570.71M (+47.3%); net profit ¥124.37M (+121.4%) — the same figures as Leaderdrive. Cited for: ARGUMENT §2(a) claim 6: "Suzhou Green Harmonic ~25% domestic share, supplies Tesla, reducers at ~40–60% of Japanese price." The ~25% domestic share is real and sourceable (RobotScope: ~25% domestic, #1, 2024) — but it is *Leaderdrive's* share, and the thesis uses it in the same passage where it separately gives Leaderdrive 26–40%, so the paragraph implies ~65% of the domestic market held by what is one company. The Tesla-supply and 40–60%-of-Japanese-price claims are trade press: RobotScope notes Optimus V3 / Mexico-plant supply discussion but no confirmed Tesla contract, and documents Chinese-driven price cuts of 30–40% rather than a 40–60% price *level*. Treat the Tesla-direct-supply and the exact price ratio as unsourced to a primary as of 2026-07-14. Links:

Zhejiang Shuanghuan Driveline (Shuanghuan Transmission)

What it is: Chinese automotive-gear giant turned precision-reducer entrant — the volume-capacity leg of the overcapacity steelman, and the company whose RV/planetary reducers reach Optimus indirectly via Tier-1s Tuopu and Sanhua. Status: Public (SZSE: 002472.SZ). Market cap / valuation: ¥36.03B CNY (~US$5.0B) as of 2026-07-14 (stockanalysis.com, SHE:002472); +39.6% YoY. Latest financials: FY2025: revenue ¥9.11B (+3.8% YoY), net profit up 23.2% YoY. TTM to Q1 2026: revenue ¥9.14B (+4.2%), net income ¥1.27B (+17.7%). Note the scale contrast the thesis should exploit: Shuanghuan's reducer/"intelligent actuator" business is a small share of a ¥9B automotive-gear company, so its 500k-unit announcement is backed by a balance sheet that does not need humanoids to work. Cited for: III.2 and ARGUMENT §2(a) claim 5: "Zhejiang Shuanghuan is bringing on a Suzhou plant described at 500,000 units/yr of reducer capacity and already supplies both Optimus and Unitree." The 500,000 units/yr Suzhou figure is confirmed in secondary supply-chain coverage (Next Financial; Chinese trade press). The Optimus link is best stated as *indirect* — Shuanghuan's RV reducers reach the Optimus drive unit through Tier-1 integrators Tuopu and Sanhua rather than as a named direct Tesla contract. Links:

Nabtesco

What it is: The Japanese RV/cycloidal reducer incumbent — the *adjacent* lane in the thesis's reducer taxonomy (medium/large industrial arm joints; zero RV in Optimus, but relevant to heavier humanoid hips/knees). Status: Public (TSE: 6268). Market cap / valuation: ¥606.5B (~US$3.9B) as of 2026-07-14 (stockanalysis.com, TYO:6268); +104% YoY. Latest financials: Q1 FY2026 (quarter to Mar 2026): net sales ¥83.0B (+16.9% YoY), operating profit ¥8.2B (+68%), led by precision reduction gears, automatic doors and marine. TTM to Q1 2026: revenue ¥319.9B (−3.9% YoY), net income ¥17.9B (+66.3%). Company FY2026 guidance ~¥327B revenue at ~8.5% operating margin. Precision Reduction Gears is one of several segments (the others: aircraft, commercial-vehicle brakes, hydraulics, automatic doors) — Nabtesco is not a pure-play robot supplier. Cited for: III.2: "Nabtesco holds ~60% of RV/cycloidal reducers for medium/large industrial arms" [LEDGER] and "Nabtesco reported doubling RV capacity by 2026 for anticipated humanoid demand"; ARGUMENT §4 supplier-depth table ("RV/cycloidal (adjacent lane): Nabtesco ~60%"); VI: "Nabtesco doubling RV capacity by 2026 — incumbents adding capacity only, not a de-novo crash program." Share caveat: the best sourceable figure is ~35% of the *global* RV market for articulated robots (explicitly an industry estimate, not audited); the ~60% number is the historical share of RV units in *industrial articulated-robot joints* and should be scoped that way or dropped to ~35% global. The capacity-doubling-by-2026 claim is confirmed in the same source, tied to anticipated Tesla/Figure/Agility demand. Links:

Spinea (a Timken company)

What it is: Slovak maker of high-precision cycloidal reduction gears and actuators (TwinSpin) — the only Western-owned cycloidal alternative to Nabtesco of any consequence, and therefore the "adjacent European" line in the reducer chokepoint. Status: Private subsidiary. Owned by The Timken Company (NYSE: TKR) — acquisition completed 29 April 2022, not by Nabtesco and not in 2023. Based in Prešov, Slovakia; founded 1994. Market cap / valuation: Not separately valued; Timken did not disclose the purchase price in its completion release. Parent Timken's market cap is the tradeable proxy: US$9.64B as of 2026-07-14 (stockanalysis.com, NYSE:TKR; +86% YoY). Latest financials: Spinea is consolidated into Timken's Industrial Motion/Engineered Bearings reporting and is not broken out. Timken FY2025: revenue US$4.58B (+0.2% YoY); TTM to Q1 2026 revenue US$4.67B (+3.3%), net income US$308.3M (−5.9%). Cited for: III.2: "Adjacent European: Spinea (cycloidal, now Timken-owned) — worth a line. [CORPUS/NEW — verify Timken ownership]" and VI OUTLINE line 118, which currently says "Nabtesco … bought Slovak cycloidal maker Spinea (2023)" — that is wrong on both the buyer and the year. Timken bought Spinea; the deal closed 29 Apr 2022. Links:

Rollvis SA

What it is: Swiss planetary/satellite roller-screw maker near Geneva — one half of the two-company Swiss core of the linear-joint chokepoint (Optimus's linear actuators run on planetary roller screws). Status: Private. Founded in Geneva 1970; production at Plan-les-Ouates. Acquired by GSA (the other Swiss roller-screw house) in 2016 — so "Rollvis + GSA" is one owner, not two competitors, which matters for the depth count. Market cap / valuation: Never disclosed — privately held, no funding rounds and no published transaction value for the 2016 GSA acquisition. Could not source a valuation to a primary link as of 2026-07-14; what is sourceable is that Rollvis is ranked the #2 planetary roller-screw maker globally, and that GSA and Rollvis *together* hold >50% of the global planetary roller-screw market (each ~26% in the trade-press breakdown). Latest financials: Not published (Swiss private company; no filing obligation). Company describes itself as deliberately staying "at a human scale," ISO 9001 / EN9100 certified, serving aerospace, robotics, medical and semiconductor customers. Cited for: VI OUTLINE line 120 and III.2: "Roller screws — the linear-joint chokepoint is European-owned, not US: Rollvis SA (2nd globally, owned by GSA) and Ewellix (3rd, Schaeffler-owned since 2022); top makers hold >70% share. Optimus uses planetary roller screws on its linear joints." All four legs check out: Rollvis #2 and GSA-owned; Ewellix #3 and Schaeffler-owned since 2022; top international makers hold >70% of the (Chinese domestic) market with ~80% import dependence; and Optimus's linear joints are reported to use 14 planetary roller screws supplied by GSA (Switzerland) — which strengthens the thesis: the Optimus linear-joint screws come from the same owner that holds Rollvis. Links:

Ewellix

What it is: Swedish linear-motion and roller-screw maker (spun out of SKF in 2019 as SKF Motion Technologies → Ewellix), ranked #3 globally in planetary roller screws — the third seat in the linear-joint chokepoint, and the asset that put Schaeffler inside the humanoid actuator stack. Status: Private, wholly owned subsidiary of Schaeffler AG since 2022 (agreement 25 Jul 2022; deal closed later that year). Previously owned by PE firm Triton. Market cap / valuation: Acquired by Schaeffler for an enterprise value of ~€582M plus ~€120M assumed net debt (announced 25 Jul 2022) — the only disclosed valuation. Latest financials: Revenue ~€216M (2021), guided to ~€250M for 2022 at the time of the acquisition; 1,196 employees as of 30 Jun 2022; six production/customising sites across the USA, Europe and Asia, 16 sales offices in 15 countries. Since acquisition it is consolidated inside Schaeffler's Bearings & Industrial Solutions division and not separately reported. Cited for: VI OUTLINE line 120 ("Ewellix (3rd, Schaeffler-owned since 2022, with a made-in-USA line)") and III.2 line 90/ARGUMENT §4 ("Schaeffler acquired Ewellix in 2022, folding GSA, Rollvis, and Ewellix into one entity"). The #3 ranking and the 2022 Schaeffler acquisition are confirmed; the "folding GSA, Rollvis and Ewellix into one entity" claim is false. GSA acquired Rollvis in 2016 and GSA/Rollvis remain independent of Schaeffler; Schaeffler bought only Ewellix. The correct structure is *two* Western owners — GSA (with Rollvis, together >50% of the global planetary roller-screw market) and Schaeffler (with Ewellix, #3) — which is still a "~two deep" supplier count, so the thesis's conclusion survives its own error. Links:

Schaeffler AG

What it is: German bearings/motion group — owner of Ewellix, a Digit deployment customer at its Cheraw SC plant (Part IV), and, since CES 2026, a would-be Tier-1 humanoid actuator supplier: the incumbent that decided to sell the whole joint rather than the parts inside it. Status: Public (XETRA: SHA0.DE; ADR SFFLY/SCFLF). Family-controlled (IHO/Schaeffler family). Merged with Vitesco Technologies in 2024. Market cap / valuation: €8.08B as of 2026-07-14 (stockanalysis.com, ETR:SHA0); +88.5% YoY. Latest financials: TTM to Q1 2026: revenue €23.33B (+16.5% YoY, reflecting the Vitesco consolidation); net income −€447M (a loss). The relevant asymmetry for the thesis: Schaeffler's entire humanoid actuator ambition sits inside a loss-making €23B automotive-and-industrial group, i.e. the Western roller-screw seat is owned by a company whose economics are set elsewhere. Cited for: III.2: "Western oligopoly consolidated: Schaeffler acquired Ewellix in 2022"; "Schaeffler unveiled an all-in-one humanoid actuator and a planetary gear/roller-screw actuator with world premiere at CES 2026 (Jan 2026), explicitly aimed at the humanoid supply-chain bottleneck"; ARGUMENT §4 ("Swiss/Schaeffler oligopoly") and the note that "Schaeffler's CES-2026 humanoid actuator (III.2) is a private product launch, not a filing." Also Part IV: Digit's 65,000+ hours across GXO, Schaeffler (Cheraw SC, since early 2025), Toyota MC Canada, Mercado Libre. Verified: the actuator was announced 16 Dec 2025 and shown publicly at CES 2026 (Jan 6–9, Las Vegas, booth 7301, West Hall); it integrates a two-stage planetary gearbox + motor + encoder + controller in one unit, 60–250 Nm, with back-drivability; Schaeffler states a humanoid needs 25–30 such actuators (hips, knees, shoulders); it explicitly targets Tier-1 status and pairs with the Nov 2025 Neura Robotics partnership (4NE-1 actuators, thousands of robots committed). Links:

SKF (AB SKF)

What it is: The Swedish bearings incumbent — the origin of Ewellix (SKF sold its Motion Technologies/linear business in 2019, which became Ewellix and then Schaeffler's) and one of the Western names "in the frame" for the precision-bearing and screw layer. Status: Public (Nasdaq Stockholm: SKF-B.ST). Splitting: SKF intends to list its Automotive business separately on Nasdaq Stockholm in Q4 2026, leaving an industrial-bearings pure-play — directly relevant to any position taken on the bearings layer. Market cap / valuation: SEK 118.29B (~US$12.5B) as of close 2026-07-13 (stockanalysis.com, STO:SKF.B); +20.9% YoY. Latest financials: FY2025: adjusted operating margin 12.7%. TTM to Q1 2026: net sales SEK 89.49B (−8.7% YoY), net income SEK 3.76B (−41.1%). Cited for: III.2: "Also in the frame: SKF, Ewellix (now Schaeffler), Creative Motion Control (CMC), GSA" — and, by history, the sourcing of the roller-screw oligopoly's third seat (Ewellix is ex-SKF). No thesis number rests on SKF's own financials; it is a structure-of-the-industry name. Links:

Nippon Thompson (IKO)

What it is: Japanese needle-roller-bearing and linear-motion maker (IKO brand) — named in the thesis as one of the holders of the sub-5-micron grinding capacity that gates the roller-screw/precision-bearing layer, and running near capacity on combined robotics + aerospace demand. Status: Public (TSE: 6480). Market cap / valuation: ¥139.2B (~US$0.9B) as of 2026-07-14 (stockanalysis.com, TYO:6480) — up 278% YoY, the sharpest re-rating of any name in this sector file, which is itself evidence for the "grinding capacity is the constraint" story. Latest financials: TTM to Q1 2026: revenue ¥63.03B (+15.9% YoY); net income ¥4.07B (+316.1%). Cited for: III.2: "Rollvis (Switzerland) and Nippon Thompson / IKO hold the sub-5-micron grinding capacity and run near capacity on robotics + aerospace demand"; ARGUMENT §4: "Rollvis and Ewellix … plus Nippon Thompson/IKO … ~two deep on the grinding constraint." The company's own reporting does not state a "sub-5-micron" grinding-capacity claim or a utilisation figure — that framing is supply-chain trade press. Could not source the "runs near capacity" and "sub-5-micron grinding" claims to a primary company disclosure as of 2026-07-14; what the primary record does support is the demand surge (revenue +15.9%, net income +316% TTM, market cap +278% YoY). Links:

THK

What it is: The world's largest linear-motion-guide and ball-screw maker (inventor of the LM guide) — in the thesis, one of the leaders in cross-roller/thin-section bearings for robot joints, and the incumbent whose ball-screw franchise sits next to the roller-screw chokepoint. Status: Public (TSE: 6481). Market cap / valuation: ¥809.0B (~US$5.2B) as of 2026-07-14 (stockanalysis.com, TYO:6481); +86.9% YoY, share price ¥7,222. Latest financials: TTM to Q1 2026: revenue ¥255.3B (−27.6% YoY) and net income −¥65.7B — both distorted by the transfer/divestiture of THK's automotive business, completed ahead of Q1 FY2026, not by a collapse in the industrial franchise. Underlying: Q4 FY2025 (quarter to Dec 2025) revenue +7.9% YoY with operating income −9.3% on restructuring costs; Q1 FY2026 (reported 11 May 2026) described as stable post-automotive-transfer with improved margins. Cited for: III.2: "THK, HIWIN, NSK lead cross-roller/thin-section bearings for joints" (alongside "China holds ~20% of the high-end precision-bearing segment" [LEDGER]). The thesis attaches no THK-specific number; the entry exists so the reader can see that the bearing incumbents have been re-rated (+87% YoY) on the same humanoid demand while their reported P&Ls are being reshaped by portfolio surgery. Links:

HIWIN Technologies

What it is: Taiwan's linear-motion and ball-screw champion — the non-Japanese, non-Chinese seat in the bearings/screws layer, and the supplier most often named next to THK for cross-roller and thin-section bearings in robot joints. Status: Public (TWSE: 2049.TW). Market cap / valuation: NT$112.15B (~US$3.5B) as of 2026-07-14 (stockanalysis.com, TPE:2049); +47.1% YoY. Latest financials: FY2025: revenue NT$24.26B (−0.5% YoY); net income NT$1.53B (−22.6%). TTM to Q1 2026: revenue NT$24.80B (+0.3%), net income NT$1.62B (−21.2%). Note the divergence the thesis can use: HIWIN's shares are up 47% on humanoid expectation while its actual revenue is flat and earnings are down — the humanoid demand is in the multiple, not yet in the P&L. Cited for: III.2: "THK, HIWIN, NSK lead cross-roller/thin-section bearings for joints"; supports the surrounding claim that the high-end precision-bearing segment is Japanese/Taiwanese-held with China at ~20% [LEDGER]. Links:

Kollmorgen (Regal Rexnord)

What it is: US frameless torque-motor maker — the American seat in the motor layer of the joint, and the name the thesis pairs with TQ-RoboDrive as the high-end frameless duopoly. Status: Private brand; a business of Regal Rexnord Corporation (NYSE: RRX), inside its Automation & Motion Control / Industrial Powertrain portfolio. Market cap / valuation: Not separately valued. Parent Regal Rexnord: US$13.99B market cap as of 2026-07-14 (stockanalysis.com, NYSE:RRX); +43.5% YoY. Latest financials: Kollmorgen is not separately reported. Regal Rexnord TTM to Q1 2026: revenue US$6.00B (+1.5% YoY), net income US$286.5M (+22.6%). Cited for: III.2: "Kollmorgen (USA) and TQ-RoboDrive (Germany) dominate the high-end frameless torque-motor market; also Allied Motion, Parker, Aerotech." Sourceable support: market trackers list the frameless-torque-motor-for-humanoids supplier set as Nidec, Kollmorgen (Regal Rexnord), Parker Hannifin, Kinco and Guangzhou Haozhi — i.e. Kollmorgen is a leader but Nidec and Chinese entrants belong in the same sentence, and "dominate" overstates a two-name duopoly. Kollmorgen's humanoid-facing product line is the TBM2G frameless servo family (with the earlier TBM/KBM series), and Regal Rexnord is actively courting humanoid developers (Humanoid Robot Forum at Automate 2026; EMEA Humanoid Robot Summit 2026). Links:

Renishaw (and RLS)

What it is: UK metrology/encoder group; through its Slovenian JV RLS d.o.o. it makes the AksIM magnetic absolute off-axis (hollow-shaft) encoders that are the design-in for frameless robot joints — the feedback layer of the joint chokepoint. Status: Public (LSE: RSW.L). RLS is a Renishaw associate/joint venture based in Ljubljana. Market cap / valuation: £3.51B (~US$4.7B) as of 2026-07-14 (stockanalysis.com, LON:RSW); +68.7% YoY. Latest financials: TTM to H1 FY2026: revenue £737.3M (+5.0% YoY); net income £74.2M (−24.1%). Renishaw's FY ends June; encoders sit in the Manufacturing Technologies segment alongside probes and CMM products. Cited for: III.2: "Renishaw / RLS AksIM magnetic absolute off-axis encoders adapted for TQ-RoboDrive frameless motors; incumbents Heidenhain, Netzer, iC-Haus in the high-precision joint-feedback niche." Fully confirmed by Renishaw's own case study: RLS supplies TQ-RoboDrive with AksIM absolute off-axis hollow-shaft encoders (plus OnAxis), specifically re-engineered to fit ≤28 mm outer diameter with up to a 5 mm hollow shaft, with extended temperature range and higher immunity to stray magnetic fields — for TQ-RoboDrive's ILM frameless stator-rotor kits (cobot payloads to 20 kg). The form-factor number (28 mm OD) is the concrete version of the thesis's "joint-feedback niche is custom, not catalogue" point. Links:

Heidenhain (DR. JOHANNES HEIDENHAIN GmbH)

What it is: The German encoder incumbent (linear, angle and rotary encoders plus CNC controls) — the high-precision benchmark in the joint-feedback niche the thesis names, and the reason "encoders" is treated as a chokepoint layer rather than a commodity. Status: Private, German. Not family- or PE-owned in the ordinary sense: the company is held in a structure under which it "operates independently of third-party economic and private interests," with profits reinvested via a non-profit foundation-type owner. Registered in Traunreut (Amtsgericht Traunstein), share capital €210M. HQ Traunreut, Bavaria; founded Berlin 1889. Market cap / valuation: No market cap (private, no listing) and no disclosed valuation or funding round — could not source a valuation to a primary link as of 2026-07-14. The scale proxy: ~€1.3B group revenue (2024) and ~8,200 employees, which ranks it #255 among German industrial companies (DDW "hidden champion" ranking). Latest financials: Revenue ~€1.3B (FY2024, latest published); ~8,200 employees across ~22 locations. Heidenhain does not publish quarterly results. Cited for: III.2: "incumbents Heidenhain, Netzer, iC-Haus in the high-precision joint-feedback niche" — Heidenhain is the anchor incumbent against which RLS/AksIM's magnetic off-axis design-in at TQ-RoboDrive is the challenger story. The thesis's own verification note ("verify Netzer/iC-Haus humanoid design-ins") stands: no confirmed humanoid design-in for Heidenhain was findable in primary sources as of 2026-07-14; Heidenhain's robotics presence is documented at the product/industry level (robotics listed among its served industries), not as a named humanoid program. Links:

Zhaowei Machinery & Electronics (兆威机电)

What it is: China's largest integrated micro-transmission/drive-system maker and the first Chinese firm to ship a commercially available high-DoF dexterous hand — the micro-actuator (hand/finger) end of the actuator layer, and the cleanest available test of whether humanoid demand is yet showing up in anyone's revenue. Status: Public (SZSE: 003021.SZ); filed a second listing application to the Hong Kong Stock Exchange (dual-listing in progress, 2026). Market cap / valuation: ¥20.39B CNY (~US$2.8B) as of 2026-07-14 (stockanalysis.com, SHE:003021) — down 14.3% YoY, the only name in this file that has de-rated. Share price ¥81.90. Latest financials: FY2025: revenue ¥1.72B (+12.5% YoY). TTM to Q1 2026: revenue ¥1.71B (+8.0%), net income ¥240.5M (+7.2%). The load-bearing number: robotics products (dexterous hands + core drive modules) generated only ¥23.87M in 2025 — 1.4% of total revenue — with company guidance of ~¥40M in 2026 (double), and ~¥100M in an optimistic case. Prior-year revenue: ¥1.152B (2022), ¥1.206B (2023), ¥1.525B (2024). Cited for: Not named in the current thesis text. It belongs in III.2 (the actuator/hand layer, Chinese entrants) and, more importantly, in the §2(a) overcapacity steelman and III.6 "the flood is probably real" concession, as the counter-datum: the Chinese supplier best positioned in dexterous hands booked 1.4% of revenue from robotics in 2025, i.e. announced humanoid capacity is running far ahead of billed humanoid revenue — the same gap the qualification-lag argument predicts. Links:

Sanhua Intelligent Controls (三花智控)

What it is: Chinese thermal-management giant turned humanoid actuator assembler — a Tesla Tier-1 since 2017 (thermal components) and now the most-cited integrator of Optimus actuators, the level of the stack *above* the reducer where Shuanghuan's RV/harmonic parts get bundled into a joint. Status: Public (SZSE: 002050.SZ; also listed in Hong Kong — trades A+H). Market cap / valuation: ¥167.44B CNY (~US$23.3B) as of 2026-07-14 (stockanalysis.com, SHE:002050); +76.8% YoY — the largest market cap in this sector file, larger than Harmonic Drive Systems, Nabtesco, THK and Schaeffler combined. Latest financials: FY2025: revenue ¥31.01B (+11.0% YoY), net profit ¥4.06B (+31.1%). TTM to Q1 2026: revenue ¥31.12B (+6.6%), net income ¥4.09B (+21.8%). Robotics revenue grew ~320% YoY in H1 2025 off a small base; robotics is still a rounding error against a ¥31B refrigeration/auto-parts business. Cited for: Not named in the current thesis text, but it is the missing link in III.2's Optimus arithmetic: the thesis states "Optimus rotary joints use harmonic drives, linear joints use planetary roller screws" (§2(a) claim 7) — Sanhua is the party that actually builds those actuators. Each Optimus is reported at 28 actuators (14 rotary + 14 linear). Caution: the widely-circulated US$685M Tesla actuator order (Oct 2025, deliveries from Q1 2026, ~180,000 robots' worth) was reported by Chinese media and Sanhua publicly issued a clarification calling the rumour untrue — do not use the $685M figure as a fact; use it only as a labelled rumour, with the auditable substitute being the +320% H1 2025 robotics revenue growth. Links:

Tuopu Group (拓普集团)

What it is: Ningbo auto-parts Tier-1 (Tesla chassis supplier since 2016) that became the reported exclusive rotary-actuator supplier for Optimus — with Sanhua, the assembly layer that consumes the reducers and roller screws this file counts. Status: Public (SSE: 601689.SS). Market cap / valuation: ¥93.76B CNY (~US$13.0B) as of 2026-07-14 (stockanalysis.com, SHA:601689); +16.2% YoY. Share price ¥54.36. Latest financials: FY2025: revenue ¥29.58B (+11.2% YoY); net profit attributable ¥2.78B (−7.4%). TTM to Q1 2026: revenue ¥30.44B (+14.1%), net income ¥2.77B (−5.3%). The load-bearing number: Tuopu broke out its robot-actuator business for the first time in 2025 and it earned ¥13.59M — about 0.05% of group revenue. Cited for: Not named in the current thesis text; it belongs alongside Sanhua in III.2 and in the §2(a) steelman. It is the sharpest single datum against "the humanoid actuator flood has already arrived": the *exclusive rotary-actuator supplier to the highest-volume humanoid program in the world* booked ¥13.59M (~US$1.9M) of robot-actuator revenue in all of 2025, while carrying a ¥94B market cap. Product scope: rotary joint modules, rotary actuators, dexterous-hand motors, electronic skin; it entered via linear actuators before developing rotary. Links:

Estun Automation (埃斯顿)

What it is: China's largest industrial-robot maker and a vertically integrated motion-control house (servo drives, motors, controllers) — the demand-side proof that the Chinese warm base can qualify its own domestic components, which is the mechanism the thesis's qualification-lag argument depends on ("Unitree, AgiBot … qualify their own domestic reducers because they own both ends"). Status: Public (SZSE: 002747.SZ); dual-listed on the Hong Kong Stock Exchange in March 2026. Founded 1993, Nanjing. Market cap / valuation: ¥35.16B CNY (~US$4.9B) as of 2026-07-14 (stockanalysis.com, SHE:002747); +108.3% YoY. Note the sell-side is unusually hostile: consensus "Sell," target ¥24.22 (~37% below spot). Latest financials: FY2025 (annual report published 24 Apr 2026): revenue ¥4.888B (+21.9% YoY); returned to profit with net profit ¥44.97M (+105.6% YoY, from a loss). Industrial robots + intelligent manufacturing systems revenue ¥3.997B (+31.8%); core automation components / motion control revenue ¥888.5M (−9.0%). TTM to Q1 2026: revenue ¥4.86B (+14.4%), net income ¥130.2M. In 2025 Estun's industrial-robot shipments surpassed the foreign brands in China for the first time, at 10.6% domestic share (rank #1). Cited for: Not named in the current thesis text. It supports III.2/III.3 and the §2(a) response: the Chinese robot OEM that now leads its home market on shipments does so on ~¥45M of net profit against a ¥35B market cap — the flood is real in units and thin in earnings, which is exactly the shape the "qualification stamp, not the part, is the binding layer" argument predicts. Links:

Inovance Technology (汇川技术)

What it is: China's dominant servo-drive/servo-motor maker — the motor-and-drive layer of the Chinese joint, and the firm whose domestic servo share is the single best measure of how far the "China can't make the precision part" premise has already been overtaken. Status: Public (SZSE ChiNext: 300124.SZ). Market cap / valuation: ¥163.08B CNY (~US$22.7B) as of 2026-07-14 (stockanalysis.com, SHE:300124); −2.6% YoY — notably, it has *not* been re-rated on humanoid hype the way the small caps have. Latest financials: TTM to Q1 2026: revenue ¥46.27B (+17.1% YoY), net income ¥4.74B (−1.2%). FY2025 nine-month: revenue ¥31.7B (+25%), net profit +27%. H1 2025 general-automation revenue ¥8.8B (+17%). Cited for: Not named in the current thesis text; it belongs in III.2's motor layer next to Kollmorgen/TQ-RoboDrive. Sourceable figures: Inovance holds roughly 28–32% of China's servo-system market (rank #1 domestically, ahead of the multinationals) in a market heading past RMB 40B by 2025, and it has publicly confirmed development of humanoid-robot key components (launches from end-2025), plus a BYD partnership on automotive-grade force-control robots. The thesis's motor-layer claim ("Kollmorgen and TQ-RoboDrive dominate the high-end frameless torque-motor market") is defensible only if scoped to the *high-end frameless* niche — at the level of servo systems generally, the volume leader is Chinese. Links: