Robot ETFs Split: KOID's $6.3B Breadth vs HUMN's Pure-Play Bet

Two humanoid robotics ETFs now offer sharply different ways to bet on the same theme, and the $6.3 billion gap between them is the whole argument.

The KraneShares Global Humanoid Robotics and Physical AI Index ETF has grown to $6.3 billion on a broad mandate, while the newer Roundhill Humanoid Robotics ETF concentrates nearly 14 percent in Tesla and NVIDIA.

The composition gap is the whole argument. HUMN's top holdings include Tesla at 8.93 percent, UBTech Robotics at 6.42 percent and NVIDIA at 4.84 percent, according to the fund's March 31 NPORT filing, while KOID's top-10 leans toward diversified suppliers such as Hexagon AB at 2.59 percent, Magna International at 2.34 percent and TE Connectivity at 2.26 percent.

Tesla filed its Q2 2026 report July 22 with $28.24 billion in revenue, up 25.5 percent year over year, and disclosed first-generation Optimus production lines being installed at Fremont on decommissioned Model S and X lines. NVIDIA reported $81.6 billion in Q1 FY2027 revenue with data center up 92 percent year over year. HUMN carries nearly 14 percent direct exposure to those two names combined; KOID's top-10 lists neither at that weight.

The tradeoffs are real. HUMN holds $46.5 million in net assets versus KOID's multi-billion-dollar base, meaning wider bid-ask spreads and more single-holder risk, and its expense ratio was not disclosed in the most recent filing. KOID is up 22.11 percent year to date against HUMN's 8.87 percent, and Polymarket assigns only a 14.5 percent probability to a Tesla Optimus release by end of 2026 — so the pure-play bet concentrates exposure to that timeline risk.

The Joint-Builders KOID Skips

HUMN goes where KOID does not. Beyond the marquee names, the fund holds Harmonic Drive Systems at 3.24 percent, Nabtesco at 2.20 percent and Hiwin Technologies at 1.82 percent — the strain-wave gears, precision reducers and ball screws that make a robot arm bend without slop. It also carries Hyundai Motor at 2.51 percent and Hyundai Glovis at 2.80 percent, giving direct exposure to the parent of Boston Dynamics, plus Rainbow Robotics at 4.14 percent, Doosan Robotics at 2.11 percent and Shenzhen Dobot at 4.15 percent. Roughly a third of the fund is allocated to Asian pure-plays that either build humanoid platforms or supply their joints. If Optimus production ramps into 2026 as guided, the components that never appear in a news headline become the choke point — and HUMN owns them at meaningful weights.

Which Fund Matches the Thesis

The choice comes down to which fund matches the reason a position was opened. If a KOID holder bought the fund to own industrial automation and physical AI broadly, KOID is doing that job, and the swap is not warranted. The broader mandate has delivered: the fund is up 22.11 percent year to date, supported in part by the broader industrial rally, including ABB, which has climbed 39.34 percent. Over a one-year window the gap narrows but still favors KOID, with HUMN returning 26.36 percent against KOID's 43.28 percent. So far, diversification has been the winning approach.

If the position was opened because of the humanoid mass-production narrative, HUMN maps to that thesis with far higher fidelity. A partial reallocation, sized to the strength of the humanoid conviction and mindful of capital-gains consequences in a taxable account, respects both. For the broader physical AI supercycle, KOID remains a reasonable core position; HUMN is the humanoid ETF that the summer 2026 headlines have been describing, though it carries the concentration risk and expense disclosure gap that come with being new and small.

This article is for informational purposes only and does not constitute investment advice.