To research a quantum computing ETF, start with its exact ticker, listing, domicile, and share class, then check the fund’s dated holdings, index rules, full costs, and prospectus risks. The label “quantum computing ETF” does not describe a standard portfolio: funds can follow different indexes, hold companies with broader technology businesses, and carry different geographic, liquidity, and structural risks.
What does a quantum computing ETF actually hold?
Use the issuer’s holdings page or daily portfolio file—not the fund name—to see what the ETF owns. Record the file’s “as of” date, then check the number of positions, largest holdings and weights, sector and country exposure, cash, and derivatives. A position count alone does not reveal concentration: a fund with many holdings can still have substantial exposure to a small number of companies or industries.
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For example, the iShares Quantum Computing UCITS ETF (QANT) issuer page reported 30 holdings as of October 5, 2026. Its sector allocation on that date was 68.85% information technology, 19.41% communication, 4.73% consumer discretionary, 4.67% industrials, 2.09% materials, and 0.25% cash and derivatives. Treat those figures as a dated snapshot, not a permanent portfolio description. Check the iShares fund page for the current portfolio data.
Distinguish an index’s constituents from the ETF’s actual holdings. Defiance Quantum ETF (QTUM) generally replicates its benchmark but may use representative sampling, so its portfolio and the index list may not match exactly at every point. Check the fund’s own holdings file as well as the benchmark information in its prospectus. QTUM’s April 30, 2026 summary prospectus describes that approach.
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How do index rules shape the portfolio?
A benchmark’s eligibility and weighting rules help explain why a fund owns particular companies and how those exposures may change. Read the index section of the prospectus and look for its eligible universe, business or revenue tests, market-cap and liquidity screens, selection and weighting method, rebalance schedule, and any permission to sample or hold assets outside the index.
QTUM tracks the BlueStar Quantum Computing and Machine Learning Index, which covers both quantum computing and machine learning. Its prospectus says the index includes firms deriving at least 50% of annual revenue or operating activity from quantum computing and machine-learning technology. Its global listed universe includes emerging markets. The index is reconstituted semiannually, and constituents are equal-weighted at rebalance subject to liquidity adjustments. Large eligible firms are included until 98.5% of eligible market capitalization is represented; existing constituents within the eligible capitalization range are also included. On March 31, 2026, the index had 82 constituents, 20 of them listed on non-U.S. exchanges. These rules illustrate why a fund with “quantum” in its name need not be a narrow basket of quantum-hardware startups.
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Index screens also have limits. A screen based on public descriptions of a company’s business may miss relevant work that is not disclosed, or exclude a business that does not meet the benchmark’s criteria. The benchmark’s method—not just its theme—determines what can qualify.
How much does a quantum ETF cost?
Begin with the current prospectus’s expense table. The stated expense ratio or total expense ratio is an ongoing fund-level cost, but it is not the full cost of owning or trading an ETF. Check whether the figure reflects a waiver, and consider brokerage or intermediary charges, bid-ask spreads, premiums or discounts to net asset value, portfolio turnover, taxes in taxable accounts, securities lending, and costs associated with derivatives or leverage. Trading costs vary with the fund and market conditions; they cannot be inferred from the expense ratio alone.
The following figures come from different products and document dates, so they are examples rather than a same-date ranking. Confirm the latest prospectus or issuer facts for the precise listing and share class you are considering.
| Fund | Published expense figure | Source and date |
|---|---|---|
| Defiance Quantum ETF (QTUM) | 0.40% total annual operating expenses | April 30, 2026 summary prospectus |
| WisdomTree Quantum Computing Fund (WQTM) | 0.45% total annual operating expenses | October 6, 2025 summary prospectus, supplemented September 30, 2026 |
| iShares Quantum Computing UCITS ETF (QANT) | 0.50% total expense ratio | Issuer page; fund facts updated October 5, 2026 |
| VanEck Quantum Computing UCITS ETF (QNTM) | 0.55% total expense ratio | Issuer page accessed October 7, 2026 |
QTUM reported 42% portfolio turnover for the fiscal year ended December 31, 2025. Its prospectus says transaction costs from turnover are not included in the expense table or example, and warns that investors may also pay intermediary charges. A turnover figure is not an additional fee rate, but it is a reminder to examine trading costs separately. See the QTUM prospectus for its fee and turnover disclosures.
What risks should you check?
Read the specific fund’s prospectus risk section. The risks below can differ in importance across products; they should not be assumed to apply identically to every ETF.
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Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minute- Concentration and issuer risk: A portfolio focused on a limited set of companies or a narrow industry can be more sensitive to individual holdings and sector moves. The QPUX prospectus warns that its focus on a limited number of quantum firms can increase volatility relative to a diversified pooled investment. Read the QPUX prospectus.
- Liquidity and ETF trading risk: The underlying securities may be less liquid than ETF shares, especially in stressed markets. Check the fund’s spread and premiums or discounts to net asset value; trading at a market price can produce a different result from the stated net asset value. VanEck and QTUM disclose liquidity and trading-related risks in their product materials. VanEck product information; QTUM summary prospectus.
- Technology and commercialization risk: Technologies and intellectual-property advantages can change, and successful commercial use is not assured. VanEck says commercial success remains uncertain and that financial exposure may extend beyond pure-play quantum companies. VanEck’s product page.
- Foreign-market and currency risk: Overseas securities can introduce currency movements, political and geopolitical events, settlement, custody, and information risks. Review the specific prospectus for the fund’s disclosures. QTUM summary prospectus.
- Index-methodology risk: Eligibility screens and index changes can produce exposures that differ from what investors expect from a theme’s name. Read the benchmark rules and the prospectus’s discussion of how the fund responds to index changes. QTUM summary prospectus.
- Structure and operating-history risk: A leveraged fund with a single-day objective has a different risk profile from a conventional unleveraged index ETF; compounding can make results over longer periods differ from the stated daily objective. A newer or non-diversified fund may also have a shorter record or greater issuer exposure. Check the fund’s prospectus rather than assuming all products share these features. QPUX prospectus.
- Securities-lending and counterparty risk: Lending securities can expose a fund to a borrower default or collateral that is insufficient when needed. QANT’s issuer materials describe its securities-lending arrangements and associated risks. iShares fund page.
Investors can lose money, and past performance does not guarantee future results. A thematic fund is not a guaranteed way to benefit from a technology’s future development or a complete investment program. QTUM’s prospectus and QPUX’s prospectus set out product-specific risks.
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How should you compare quantum ETFs?
Compare products on the same date and, where possible, the same share-class basis. Do not rank funds by expense ratio alone or assume similarly named funds hold the same companies. Record the legal fund name, ticker, exchange, domicile, share class, and trading currency first; this helps distinguish U.S.-listed funds from UCITS products and products with similar tickers.
| Comparison question | What to record |
|---|---|
| Portfolio | Holdings date, top positions and weights, sector and country exposures, cash, derivatives, and whether the data are full holdings or a summary |
| Benchmark | Eligible companies, business tests, market-cap or liquidity screens, weighting method, reconstitution schedule, and sampling discretion |
| Costs | Expense ratio, waivers, intermediary charges, spread, premiums or discounts, turnover, and any derivative or leverage costs |
| Structure | Physical or other exposure method, full replication or sampling, securities lending, and any leverage or single-day objective |
| Access and trading | Domicile, listing, currency, availability in your market, fund size, liquidity, and observed spread or premium/discount behavior |
| Risk and record | Prospectus risk disclosures, concentration, foreign exposure, counterparty risk, and operating history |
For example, QANT is an Ireland-domiciled, accumulating, physical UCITS ETF benchmarked to the STOXX Global Quantum Computing Index, while VanEck’s QNTM is a UCITS product tracking a distinct MarketVector index. Their similar theme does not make their benchmarks or fees interchangeable. Check each issuer’s product page and prospectus for the latest details. iShares QANT; VanEck QNTM.
Where to verify current fund information
Use the latest prospectus for investment objective, standardized expenses, strategy, and formal risk disclosures. Use the issuer’s holdings or portfolio page for the latest dated positions and product facts, then check the latest shareholder report where relevant. Holdings, expenses, listings, and fund status can change; verify the exact product and date before relying on a comparison. The figures above cover selected products and do not establish an exhaustive global list.
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