{"url":"https://etfiq.com/rankings/themes-concentrated-memory","section":"rankings","title":"The most concentrated memory and storage ETFs | ETFIQ","description":"The most concentrated memory and storage ETFs, ranked by the share of the fund held in its ten largest positions, as of Oct 20, 2026.","as_of":"Oct 20, 2026","structured_data":[{"@type":"ItemList","name":"The most concentrated memory and storage ETFs","numberOfItems":3,"itemListOrder":"https://schema.org/ItemListOrderDescending","itemListElement":[{"@type":"ListItem","position":1,"name":"DISK","url":"https://etfiq.com/funds/disk"},{"@type":"ListItem","position":2,"name":"HBMX","url":"https://etfiq.com/funds/hbmx"},{"@type":"ListItem","position":3,"name":"DRAM","url":"https://etfiq.com/funds/dram"}]},{"@type":"Dataset","name":"The most concentrated memory and storage ETFs","description":"The most concentrated memory and storage ETFs, ranked by the share of the fund held in its ten largest positions, as of Oct 20, 2026.","url":"https://etfiq.com/rankings/themes-concentrated-memory","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 most concentrated memory and storage E...","item":"https://etfiq.com/rankings/themes-concentrated-memory"}]},{"@type":"WebPage","name":"The most concentrated memory and storage ETFs","description":"The most concentrated memory and storage ETFs, ranked by the share of the fund held in its ten largest positions, as of Oct 20, 2026.","url":"https://etfiq.com/rankings/themes-concentrated-memory","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":2678,"truncated":false,"content":"ETFIQ / Rankings / The most concentrated memory and storage E... \n \n As of Oct 20, 2026 . Rebuilt every trading night.\n The most concentrated memory and storage ETFs\n See 3 funds ranked by the share of the fund held in its ten largest positions. Updated Oct 20, 2026. Two funds on one theme can hold ten names or two hundred. Fund names do not show which.\n The most concentrated memory and storage ETFs, ranked by the share of the fund held in its ten largest positions, as of Oct 20, 2026. Source: ETFIQ. # Ticker Fund Top ten weight Holdings Net assets Total return, 1Y \n 1 DISK Tema Memory ETF 85.8% 17 $55m too new \n 2 HBMX Tuttle Capital Concentrated Memory Stack 59.2% 23 $27m too new \n 3 DRAM Roundhill Memory ETF 56.4% 12 $18.6bn too new \n \n Method\n The 3 of 5 ETFs in the memory and storage theme with a filed book, most concentrated first. Across the funds listed here the weight in the ten largest runs from 56.4% to 85.8%. Concentration is not a fault. It shows how much rides on ten holdings. 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 memory and storage ETF and what it holds The largest memory and storage ETFs 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 most concentrated memory and storage ETFs, ranked by the share of the fund held in its ten largest positions, data as of Oct 20, 2026. https://etfiq.com/rankings/themes-concentrated-memory 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 most concentrated memory and storage ETFs, ranked by the share of the fund held in its ten largest positions, data as of Oct 20, 2026. https://etfiq.com/rankings/themes-concentrated-memory APA ETFIQ. (Oct 20, 2026). The most concentrated memory and storage ETFs, ranked by the share of the fund held in its ten largest positions. Retrieved from https://etfiq.com/rankings/themes-concentrated-memory Markdown [The most concentrated memory and storage ETFs, ranked by the share of the fund held in its ten largest positions (ETFIQ, Oct 20, 2026)](https://etfiq.com/rankings/themes-concentrated-memory)","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 most concentrated memory and storage ETFs, ranked by the share of the fund held in its ten largest positions, data as of Oct 20, 2026. https://etfiq.com/rankings/themes-concentrated-memory"}