{"url":"https://etfiq.com/rankings/themes-biggest","section":"rankings","title":"The largest thematic ETFs | ETFIQ","description":"SMH leads the largest thematic ETFs at $66.6bn (net assets), as of Oct 27, 2026. The largest thematic ETFs, ranked by net assets.","as_of":"Oct 27, 2026","structured_data":[{"@type":"ItemList","name":"The largest thematic ETFs","numberOfItems":15,"itemListOrder":"https://schema.org/ItemListOrderDescending","itemListElement":[{"@type":"ListItem","position":1,"name":"SMH","url":"https://etfiq.com/funds/smh"},{"@type":"ListItem","position":2,"name":"SOXX","url":"https://etfiq.com/funds/soxx"},{"@type":"ListItem","position":3,"name":"GDX","url":"https://etfiq.com/funds/gdx"},{"@type":"ListItem","position":4,"name":"DRAM","url":"https://etfiq.com/funds/dram"},{"@type":"ListItem","position":5,"name":"CIBR","url":"https://etfiq.com/funds/cibr"},{"@type":"ListItem","position":6,"name":"IGV","url":"https://etfiq.com/funds/igv"},{"@type":"ListItem","position":7,"name":"PAVE","url":"https://etfiq.com/funds/pave"},{"@type":"ListItem","position":8,"name":"BAI","url":"https://etfiq.com/funds/bai"},{"@type":"ListItem","position":9,"name":"ITA","url":"https://etfiq.com/funds/ita"},{"@type":"ListItem","position":10,"name":"GRID","url":"https://etfiq.com/funds/grid"},{"@type":"ListItem","position":11,"name":"IGF","url":"https://etfiq.com/funds/igf"},{"@type":"ListItem","position":12,"name":"IBB","url":"https://etfiq.com/funds/ibb"},{"@type":"ListItem","position":13,"name":"AIQ","url":"https://etfiq.com/funds/aiq"},{"@type":"ListItem","position":14,"name":"XBI","url":"https://etfiq.com/funds/xbi"},{"@type":"ListItem","position":15,"name":"AIRR","url":"https://etfiq.com/funds/airr"}]},{"@type":"Dataset","name":"The largest thematic ETFs","description":"SMH leads the largest thematic ETFs at $66.6bn (net assets), as of Oct 27, 2026. The largest thematic ETFs, ranked by net assets.","url":"https://etfiq.com/rankings/themes-biggest","dateModified":"2026-10-27","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 thematic ETFs","item":"https://etfiq.com/rankings/themes-biggest"}]},{"@type":"WebPage","name":"The largest thematic ETFs","description":"SMH leads the largest thematic ETFs at $66.6bn (net assets), as of Oct 27, 2026. The largest thematic ETFs, ranked by net assets.","url":"https://etfiq.com/rankings/themes-biggest","dateModified":"2026-10-27","isPartOf":{"@type":"WebSite","name":"ETFIQ","url":"https://etfiq.com"},"speakable":{"@type":"SpeakableSpecification","cssSelector":[".lede"]},"publisher":{"@id":"https://etfiq.com/#org"}}],"characters":3531,"truncated":false,"content":"ETFIQ / Rankings / The largest thematic ETFs \n \n As of Oct 27, 2026 . Rebuilt every trading night.\n The largest thematic ETFs\n See 15 funds ranked by net assets. Updated Oct 27, 2026. Before buying a thematic fund beside an index fund, ask how much of it the S&P 500 already holds.\n The largest thematic ETFs, ranked by net assets, as of Oct 27, 2026. Source: ETFIQ. # Ticker Fund Theme Net assets Weight in S&P 500 companies Fee Source \n 1 SMH VanEck Semiconductor ETF Semiconductors $66.6bn 79.3% 0.35% ETFIQ, shares \u00d7 NAV, Oct 23, 2026 \n 2 SOXX iShares Semiconductor ETF Semiconductors $46.4bn 74.5% 0.33% Issuer daily, Oct 26, 2026 \n 3 GDX VanEck Gold Miners ETF Gold miners $24.7bn 11.7% 0.51% ETFIQ, shares \u00d7 NAV, Oct 23, 2026 \n 4 DRAM Roundhill Memory ETF Memory and storage $19.2bn 15.7% 0.65% Issuer daily, Oct 27, 2026 \n 5 CIBR First Trust NASDAQ Cybersecurity ETF Cybersecurity $18.8bn 60.6% 0.58% Issuer page, Oct 26, 2026 \n 6 IGV iShares Expanded Tech-Software Secto Cloud and software $14.3bn 80.1% 0.38% Issuer daily, Oct 26, 2026 \n 7 PAVE Global X U.S. Infrastructure Develop Infrastructure $13.6bn 62.1% 0.47% Issuer page, Oct 12, 2026 \n 8 BAI iShares A.I. Innovation and Tech Act Artificial intelligence $13.2bn 54.9% 0.55% Issuer daily, Oct 27, 2026 \n 9 ITA iShares U.S. Aerospace & Defense ETF Defense $12.0bn 81.2% 0.37% Issuer daily, Oct 27, 2026 \n 10 GRID First Trust NASDAQ Clean Edge Smart Electrification and the grid $11.1bn 40.9% 0.56% Issuer page, Oct 26, 2026 \n 11 IGF iShares Global Infrastructure ETF Infrastructure $10.8bn 31.8% 0.37% Issuer daily, Oct 26, 2026 \n 12 IBB iShares Biotechnology ETF Biotech $10.7bn 40.4% 0.44% Issuer daily, Oct 26, 2026 \n 13 AIQ Global X Artificial Intelligence & T Artificial intelligence $10.6bn 64.7% 0.68% Issuer page, Oct 12, 2026 \n 14 XBI State Street SPDR S&P Biotech ETF Biotech $10.2bn 13.4% 0.35% Issuer daily, Oct 26, 2026 \n 15 AIRR First Trust RBA American Industrial Reshoring and manufacturing $8.2bn 14.7% 0.69% Issuer page, Oct 26, 2026 \n \n Method\n Ranked on the most recent net assets ETFIQ can source for each fund, with the kind of source named beside it. Size shows where the money is, not what a fund did. The list sorts one published number, with no scoring or weighting. Every fund ETFIQ covers in this category is eligible, closed funds included.\n Where to next\n The thematic ETFs least like the S&P 500 Every thematic ETF Sources\n Fund holdings from SEC Form N-PORT and from the issuers\u2019 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 Links are sources, not endorsements.\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 thematic ETFs, ranked by net assets, data as of Oct 27, 2026. https://etfiq.com/rankings/themes-biggest Free to use with attribution for data ETFIQ computes; issuer data stays under its owner's terms. The underlying files are at Open data .\n Other forms Plain ETFIQ, The largest thematic ETFs, ranked by net assets, data as of Oct 27, 2026. https://etfiq.com/rankings/themes-biggest APA ETFIQ. (Oct 27, 2026). The largest thematic ETFs, ranked by net assets. Retrieved from https://etfiq.com/rankings/themes-biggest Markdown [The largest thematic ETFs, ranked by net assets (ETFIQ, Oct 27, 2026)](https://etfiq.com/rankings/themes-biggest)","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":"Data ETFIQ computes is free to use with attribution: ETFIQ (etfiq.com). Issuer data stays under its owner's terms.","citation":"ETFIQ, The largest thematic ETFs, ranked by net assets, data as of Oct 27, 2026. https://etfiq.com/rankings/themes-biggest"}