{"url":"https://etfiq.com/rankings/themes-largest-water","section":"rankings","title":"The largest water ETFs | ETFIQ","description":"The largest water ETFs, ranked by net assets, as of Oct 2, 2026. 5 funds from ETFIQ\u2019s own published figures. A ranking is not a recommendation.","as_of":"Oct 2, 2026","structured_data":[{"@type":"ItemList","name":"The largest water ETFs","numberOfItems":5,"itemListOrder":"https://schema.org/ItemListOrderDescending","itemListElement":[{"@type":"ListItem","position":1,"name":"PHO","url":"https://etfiq.com/funds/pho"},{"@type":"ListItem","position":2,"name":"FIW","url":"https://etfiq.com/funds/fiw"},{"@type":"ListItem","position":3,"name":"CGW","url":"https://etfiq.com/funds/cgw"},{"@type":"ListItem","position":4,"name":"PIO","url":"https://etfiq.com/funds/pio"},{"@type":"ListItem","position":5,"name":"AQWA","url":"https://etfiq.com/funds/aqwa"}]},{"@type":"Dataset","name":"The largest water ETFs","description":"The largest water ETFs, ranked by net assets, as of Oct 2, 2026. 5 funds from ETFIQ\u2019s own published figures. A ranking is not a recommendation.","url":"https://etfiq.com/rankings/themes-largest-water","dateModified":"2026-10-02","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 water ETFs","item":"https://etfiq.com/rankings/themes-largest-water"}]},{"@type":"WebPage","name":"The largest water ETFs","description":"The largest water ETFs, ranked by net assets, as of Oct 2, 2026. 5 funds from ETFIQ\u2019s own published figures. A ranking is not a recommendation.","url":"https://etfiq.com/rankings/themes-largest-water","dateModified":"2026-10-04","isPartOf":{"@type":"WebSite","name":"ETFIQ","url":"https://etfiq.com"},"speakable":{"@type":"SpeakableSpecification","cssSelector":[".lede"]},"publisher":{"@id":"https://etfiq.com/#org"}}],"characters":2606,"truncated":false,"content":"ETFIQ / Rankings / The largest water ETFs \n \n As of Oct 2, 2026 . Rebuilt every trading night.\n The largest water ETFs\n Every fund here is sold on water. 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 water ETFs, ranked by net assets, as of Oct 2, 2026. Source: ETFIQ. # Ticker Fund Net assets Weight in S&P 500 companies Total return, 1Y Fee Source \n 1 PHO Invesco Water Resources ETF $1.9bn 61.3% \u22125.8% 0.59% Issuer holdings, Oct 3, 2026 \n 2 FIW First Trust Water ETF $1.7bn 48.1% \u22127.0% 0.50% Issuer page, Oct 2, 2026 \n 3 CGW Invesco S&P Global Water Index ETF $1.0bn 25.6% \u22120.3% 0.58% Issuer holdings, Oct 3, 2026 \n 4 PIO Invesco Global Water ETF $262m 39.1% \u22123.1% 0.75% Issuer holdings, Oct 3, 2026 \n 5 AQWA Global X Clean Water ETF $20m 19.5% \u22125.4% 0.50% Issuer daily, Oct 2, 2026 \n \n Method\n The 6 ETFs in the water theme, of which 5 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 19.5% to 61.3%. Size is not a measure of anything a fund did. It is where the money is. The ranking is the published field sorted, nothing else: no scoring, no weighting and no view on any fund. Every fund ETFIQ covers in this category is eligible, including funds that have closed, because leaving them out would flatter the category.\n Where to next\n Every water 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. It is not affiliated with any issuer, and a link is not an endorsement.\n A ranking is not a recommendation and no order on this site is an opinion. ETFIQ is an independent publisher, not an adviser. Standards and sources \n Cite this page. ETFIQ, The largest water ETFs, ranked by net assets, data as of Oct 2, 2026. https://etfiq.com/rankings/themes-largest-water Free to use with attribution ; the underlying files are at Open data .\n Other forms Plain ETFIQ, The largest water ETFs, ranked by net assets, data as of Oct 2, 2026. https://etfiq.com/rankings/themes-largest-water APA ETFIQ. (Oct 2, 2026). The largest water ETFs, ranked by net assets. Retrieved from https://etfiq.com/rankings/themes-largest-water Markdown [The largest water ETFs, ranked by net assets (ETFIQ, Oct 2, 2026)](https://etfiq.com/rankings/themes-largest-water)","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/","citation":"ETFIQ, as of Oct 2, 2026. https://etfiq.com/rankings/themes-largest-water"}