{"url":"https://etfiq.com/rankings/themes-largest-quantum","section":"rankings","title":"The largest quantum computing ETFs | ETFIQ","description":"The largest quantum computing ETFs, ranked by net assets, as of Oct 20, 2026. 4 funds from ETFIQ\u2019s own published figures.","as_of":"Oct 20, 2026","structured_data":[{"@type":"ItemList","name":"The largest quantum computing ETFs","numberOfItems":4,"itemListOrder":"https://schema.org/ItemListOrderDescending","itemListElement":[{"@type":"ListItem","position":1,"name":"QTUM","url":"https://etfiq.com/funds/qtum"},{"@type":"ListItem","position":2,"name":"WQTM","url":"https://etfiq.com/funds/wqtm"},{"@type":"ListItem","position":3,"name":"QTUP","url":"https://etfiq.com/funds/qtup"},{"@type":"ListItem","position":4,"name":"CQTM","url":"https://etfiq.com/funds/cqtm"}]},{"@type":"Dataset","name":"The largest quantum computing ETFs","description":"The largest quantum computing ETFs, ranked by net assets, as of Oct 20, 2026. 4 funds from ETFIQ\u2019s own published figures.","url":"https://etfiq.com/rankings/themes-largest-quantum","dateModified":"2026-10-20","creator":{"@id":"https://etfiq.com/#org"},"license":"https://etfiq.com/license/","isAccessibleForFree":true,"creditText":"ETFIQ (etfiq.com)","publisher":{"@id":"https://etfiq.com/#org"},"inLanguage":"en","creativeWorkStatus":"Published","distribution":[{"@type":"DataDownload","encodingFormat":"application/json","contentUrl":"https://etfiq.com/data/thematic.json"}],"variableMeasured":["Weight overlap with the S&P 500","Active share","Holdings","Top ten share of the fund","Total return","Fee for the differing part","Expense ratio"],"keywords":["exchange-traded funds","ETF","Thematic ETFs","fund data","SEC filings"]},{"@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"ETFIQ","item":"https://etfiq.com/"},{"@type":"ListItem","position":2,"name":"Rankings","item":"https://etfiq.com/rankings/"},{"@type":"ListItem","position":3,"name":"The largest quantum computing ETFs","item":"https://etfiq.com/rankings/themes-largest-quantum"}]},{"@type":"WebPage","name":"The largest quantum computing ETFs","description":"The largest quantum computing ETFs, ranked by net assets, as of Oct 20, 2026. 4 funds from ETFIQ\u2019s own published figures.","url":"https://etfiq.com/rankings/themes-largest-quantum","dateModified":"2026-10-20","isPartOf":{"@type":"WebSite","name":"ETFIQ","url":"https://etfiq.com"},"speakable":{"@type":"SpeakableSpecification","cssSelector":[".lede"]},"publisher":{"@id":"https://etfiq.com/#org"}}],"characters":2601,"truncated":false,"content":"ETFIQ / Rankings / The largest quantum computing ETFs \n \n As of Oct 20, 2026 . Rebuilt every trading night.\n The largest quantum computing ETFs\n See 4 funds ranked by net assets. Updated Oct 20, 2026. Every fund here is sold on quantum computing. What each one holds, and how much of it the S&P 500 already holds for you, is the column beside the size.\n The largest quantum computing ETFs, ranked by net assets, as of Oct 20, 2026. Source: ETFIQ. # Ticker Fund Net assets Weight in S&P 500 companies Total return, 1Y Fee Source \n 1 QTUM Defiance Quantum ETF $5.2bn 37.4% +27.0% 0.40% Issuer daily, Oct 19, 2026 \n 2 WQTM WisdomTree Quantum Computing Fund $329m 38.5% \u22123.2% 0.45% SEC filing, Jun 30, 2026 \n 3 QTUP Defiance Long Pure Quantum ETF $17m not published too new 0.77% Issuer daily, Oct 19, 2026 \n 4 CQTM Corgi Quantum Computing ETF $13m 16.6% too new 0.35% Issuer daily, Oct 20, 2026 \n \n Method\n The 4 ETFs in the quantum computing theme, of which 4 publish net assets, ranked on the most recent figure for each. Across the funds listed here the weight held in S&P 500 companies runs from 16.6% to 38.5%. Size shows where the money is, not what a fund did. The list sorts one published figure, with no scoring or weighting. Every fund ETFIQ covers in this category is eligible, closed funds included.\n Where to next\n Every quantum computing ETF and what it holds The thematic ETFs least like the S&P 500 Where these figures came from\n Fund holdings from SEC Form N-PORT and from the issuers own daily files SEC EDGAR, full-text search of fund filings SEC Form N-PORT, what a fund filed it holds Rule 19a-1, what a distribution notice must say ETFIQ links to the documents behind every figure; a link is not an endorsement.\n A ranking is not a recommendation or an opinion. ETFIQ is an independent publisher, not an adviser. Standards and sources \n Cite this page. ETFIQ, The largest quantum computing ETFs, ranked by net assets, data as of Oct 20, 2026. https://etfiq.com/rankings/themes-largest-quantum Free to use with attribution for figures ETFIQ computes; issuer data stays under its owner's terms. The underlying files are at Open data .\n Other forms Plain ETFIQ, The largest quantum computing ETFs, ranked by net assets, data as of Oct 20, 2026. https://etfiq.com/rankings/themes-largest-quantum APA ETFIQ. (Oct 20, 2026). The largest quantum computing ETFs, ranked by net assets. Retrieved from https://etfiq.com/rankings/themes-largest-quantum Markdown [The largest quantum computing ETFs, ranked by net assets (ETFIQ, Oct 20, 2026)](https://etfiq.com/rankings/themes-largest-quantum)","source":"ETFIQ, independent ETF data. Recomputed nightly from public filings and prices.","publisher":{"@id":"https://etfiq.com/#org","name":"ETFIQ","url":"https://etfiq.com"},"license":"https://etfiq.com/license/","license_text":"Figures ETFIQ computes are free to use with attribution: ETFIQ (etfiq.com). Issuer data stays under its owner's terms.","citation":"ETFIQ, The largest quantum computing ETFs, ranked by net assets, data as of Oct 20, 2026. https://etfiq.com/rankings/themes-largest-quantum"}