{"url":"https://etfiq.com/themes/memory","section":"themes","title":"Memory and storage ETFs: 5 funds, largest first | ETFIQ","description":"ETFIQ covers 5 memory and storage ETFs. The largest are DRAM ($19.2bn) and DISK ($53m); fees run 0.65% to 0.95%, as of Jul 31 to Oct 27, 2026.","as_of":"Oct 27, 2026","structured_data":[{"@type":"FAQPage","mainEntity":[{"@type":"Question","name":"How many memory and storage ETFs are there?","acceptedAnswer":{"@type":"Answer","text":"ETFIQ covers 5 US listed memory and storage ETFs as of Oct 27, 2026. That is every one it can measure from the fund\u2019s own published holdings."}},{"@type":"Question","name":"What is the largest memory and storage ETF?","acceptedAnswer":{"@type":"Answer","text":"DRAM, Roundhill Memory ETF, at $19.2bn in net assets as of Oct 27, 2026, the largest of the 5 memory and storage ETFs with a published size."}},{"@type":"Question","name":"What is the cheapest memory and storage ETF?","acceptedAnswer":{"@type":"Answer","text":"DRAM, Roundhill Memory ETF, at 0.65% a year by its prospectus filed Mar 31, 2026, the lowest fee of the 5 memory and storage ETFs that publish one."}},{"@type":"Question","name":"What do memory and storage ETFs hold?","acceptedAnswer":{"@type":"Answer","text":"Funds that hold the makers of memory chips, DRAM, NAND and high bandwidth memory, and the equipment used to make them. Between them the 3 memory and storage ETFs ETFIQ can read name 26 companies in their ten largest holdings, by holdings dated Jun 30, 2026 to Oct 26, 2026, most widely Micron Technology Inc, which is among the ten largest of 3 of them."}},{"@type":"Question","name":"Do memory and storage ETFs hold the same companies?","acceptedAnswer":{"@type":"Answer","text":"It depends which two. Across the 3 pairs of the 3 memory and storage ETFs with a full published book, by holdings dated Jun 30, 2026 to Oct 26, 2026, DISK and DRAM hold 44% of their weight in the same companies, DRAM and HBMX hold 18%, and the middle pair holds 24%. Two funds sold on one theme are not the same fund."}}]},{"@type":"ItemList","name":"Memory and storage ETFs: 5 funds, largest first","numberOfItems":5,"itemListElement":[{"@type":"ListItem","position":1,"name":"DRAM","url":"https://etfiq.com/funds/dram"},{"@type":"ListItem","position":2,"name":"DISK","url":"https://etfiq.com/funds/disk"},{"@type":"ListItem","position":3,"name":"HBMX","url":"https://etfiq.com/funds/hbmx"},{"@type":"ListItem","position":4,"name":"KMEM","url":"https://etfiq.com/funds/kmem"},{"@type":"ListItem","position":5,"name":"PRAM","url":"https://etfiq.com/funds/pram"}]},{"@type":"ItemList","name":"The 5 largest memory and storage ETFs","itemListOrder":"https://schema.org/ItemListOrderDescending","numberOfItems":5,"itemListElement":[{"@type":"ListItem","position":1,"name":"DRAM","url":"https://etfiq.com/funds/dram"},{"@type":"ListItem","position":2,"name":"DISK","url":"https://etfiq.com/funds/disk"},{"@type":"ListItem","position":3,"name":"HBMX","url":"https://etfiq.com/funds/hbmx"},{"@type":"ListItem","position":4,"name":"KMEM","url":"https://etfiq.com/funds/kmem"},{"@type":"ListItem","position":5,"name":"PRAM","url":"https://etfiq.com/funds/pram"}]},{"@type":"Dataset","name":"Memory and storage ETFs: what each one holds","description":"ETFIQ covers 5 memory and storage ETFs. The largest are DRAM ($19.2bn) and DISK ($53m); fees run 0.65% to 0.95%, as of Jul 31 to Oct 27, 2026.","url":"https://etfiq.com/themes/memory","dateModified":"2026-10-27","inLanguage":"en","creator":{"@id":"https://etfiq.com/#org"},"publisher":{"@id":"https://etfiq.com/#org"},"license":"https://etfiq.com/license/","isAccessibleForFree":true,"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":"Thematic ETFs","item":"https://etfiq.com/themes/"},{"@type":"ListItem","position":3,"name":"Memory and storage","item":"https://etfiq.com/themes/memory"}]},{"@type":"WebPage","name":"Memory and storage ETFs: 5 funds, largest first","description":"ETFIQ covers 5 memory and storage ETFs. The largest are DRAM ($19.2bn) and DISK ($53m); fees run 0.65% to 0.95%, as of Jul 31 to Oct 27, 2026.","url":"https://etfiq.com/themes/memory","dateModified":"2026-10-27","isPartOf":{"@type":"WebSite","name":"ETFIQ","url":"https://etfiq.com"},"speakable":{"@type":"SpeakableSpecification","cssSelector":[".lede",".faq"]},"publisher":{"@id":"https://etfiq.com/#org"}}],"characters":7531,"truncated":false,"content":"ETFIQ / Thematic ETFs / Memory and storage \n \n Data as of Oct 27, 2026 .\n Memory and storage ETFs: what each one holds\n See every memory and storage ETF by what it holds, not by its name. Funds that hold the makers of memory chips, DRAM , NAND and high bandwidth memory, and the equipment used to make them. 5 funds, largest first. Updated Oct 27, 2026. The typical fund carries 29% of its weight in S&P 500 stocks, the 28th most of the 53 themes with holdings on file.\n 5 US listed memory and storage ETFs \n $19.2bn The largest, DRAM \n 0.65% The cheapest, DRAM \n\n The short answers\n Least like the S&P 500 DRAM , Roundhill Memory ETF, 15.7% of its weight in S&P 500 companies. Closest pair DISK and DRAM , 44% of their weight in the same companies. What these funds actually own\n Between them the 3 funds' ten largest holdings name 26 companies, of which 3 appear in more than one. Micron Technology Inc is among the ten largest of 3 of them, at an average of 6.5% of the fund.\n Memory and storage ETFs, the companies their ten largest holdings name. Source: each fund's latest SEC filing or its issuer\u2019s own daily holdings file, read by ETFIQ. Company Among the ten largest of Average weight where it is Largest, and in which fund \n Micron Technology Inc MU 3 of 3 6.5% 8.9% in DISK \n Sandisk Corp SNDK 2 of 3 11.9% 18.6% in DISK \n Western Digital Corp WDC 2 of 3 4.1% 4.3% in DRAM \n SK HYNIX INC 1 of 3 15.9% 15.9% in DISK \n SK hynix Inc 000660 1 of 3 15.9% 15.9% in DRAM \n KIOXIA HOLDINGS CORP 1 of 3 14.6% 14.6% in DISK \n Samsung Electronics Co Ltd 005930 1 of 3 14.4% 14.4% in DRAM \n Advantest Corp ATEYY 1 of 3 10.0% 10.0% in HBMX \n Penguin Solutions Inc PENG 1 of 3 6.2% 6.2% in HBMX \n CHANGXIN MEMORY TECHNOLOGIES-SWAP-MREX-L 1 of 3 6.1% 6.1% in DISK \n Onto Innovation Inc ONTO 1 of 3 5.9% 5.9% in HBMX \n Camtek Ltd/Israel CAMT 1 of 3 5.2% 5.2% in HBMX \n ASML Holding NV ASML 1 of 3 5.2% 5.2% in HBMX \n SAMSUNG ELECTRONICS CO LTD 1 of 3 4.9% 4.9% in DISK \n SK hynix Inc SKHY 1 of 3 4.8% 4.8% in HBMX \n \n The 15 most widely held of 26. Each row counts the ten largest holdings of each fund, so a fund missing from a row may still hold that company lower down. Weights are of the funds that name it, not of the theme.\n The 5 largest memory and storage ETFs\n ETFIQ covers 5 memory and storage ETFs. The largest are DRAM ( $19.2bn ), DISK ( $53m ) and HBMX ( $27m ); fees run 0.65% to 0.95% , as of Jul 31 to Oct 27, 2026 .\n DRAM Roundhill Memory ETF $19.2bn 0.65% \n DISK Tema Memory ETF $53m 0.75% \n HBMX Tuttle Capital Concentrated Memory Stack ETF $27m 0.95% \n KMEM Kurv Memory Select ETF $23m 0.65% \n PRAM Defiance Memory & Photonics ETF $5.4m 0.65% \n \n Memory and storage ETFs: what each one holds, as of Oct 27, 2026. Source: ETFIQ. Ticker Fund Issuer Net assets In the S&P 500 Active share Total return 1Y vs its benchmark 1Y Fee \n DRAM Roundhill Memory ETF Roundhill $19.2bn 15.7% 96.8% first traded 208 days ago \u00b7 0.65% \n DISK Tema Memory ETF Tema $53m 35.3% 96.8% first traded 119 days ago \u00b7 0.75% \n HBMX Tuttle Capital Concentrated Memory Stack ETF Tuttle $27m 29.1% 94.4% first traded 147 days ago \u00b7 0.95% \n KMEM Kurv Memory Select ETF Kurv $23m not yet filed not yet filed first traded 118 days ago \u00b7 0.65% \n PRAM Defiance Memory & Photonics ETF Defiance $5.4m holds a swap holds a swap first traded 61 days ago \u00b7 0.65% \n \n How much of each pair is the same fund\n The closest pair is DISK and DRAM , which hold 44% of their weight in the same companies. The furthest apart is DRAM and HBMX at 18%. The middle pair of the 3 is 24%. The grid is the 3 largest of 5 funds.\n Memory and storage ETFs, the share of each pair\u2019s weight held in the same companies. Read across or down; the number is the same either way. Cells are shaded against the closest pair here, 44%. Source: each fund\u2019s own filed or daily holdings, read by ETFIQ. DRAM DISK HBMX \n DRAM \u00b7 44% 18% \n DISK 44% \u00b7 24% \n HBMX 18% 24% \u00b7 \n \n Weight overlap adds the smaller of the two weights for every company both funds hold. Funds with a cut-short book are left out, not compared short.\n What each fund holds alone\n Memory and storage ETFs, the largest holding no other fund in the grid holds. Source: ETFIQ. Fund Largest holding it alone has Weight All of its own names \n DRAM GigaDevice Semiconductor Inc 603986 3.1% 3.7% \n DISK CHANGXIN MEMORY TECHNOLOGIES-SWAP-MREX-L 6.1% 19.8% \n HBMX Advantest Corp ATEYY 10.0% 73.2% \n \n Questions people ask\n How many memory and storage ETFs are there? ETFIQ covers 5 US listed memory and storage ETFs as of Oct 27, 2026. That is every one it can measure from the fund\u2019s own published holdings. What is the largest memory and storage ETF? DRAM , Roundhill Memory ETF, at $19.2bn in net assets as of Oct 27, 2026, the largest of the 5 memory and storage ETFs with a published size. What is the cheapest memory and storage ETF? DRAM , Roundhill Memory ETF, at 0.65% a year by its prospectus filed Mar 31, 2026, the lowest fee of the 5 memory and storage ETFs that publish one. What do memory and storage ETFs hold? Funds that hold the makers of memory chips, DRAM , NAND and high bandwidth memory, and the equipment used to make them. Between them the 3 memory and storage ETFs ETFIQ can read name 26 companies in their ten largest holdings, by holdings dated Jun 30, 2026 to Oct 26, 2026, most widely Micron Technology Inc, which is among the ten largest of 3 of them. Do memory and storage ETFs hold the same companies? It depends which two. Across the 3 pairs of the 3 memory and storage ETFs with a full published book, by holdings dated Jun 30, 2026 to Oct 26, 2026, DISK and DRAM hold 44% of their weight in the same companies, DRAM and HBMX hold 18%, and the middle pair holds 24%. Two funds sold on one theme are not the same fund. What the issuers say about this theme\n The issuers behind these memory and storage funds publish their own work on this theme. These are their pages and words, not ETFIQ\u2019s. A fund company writing about a theme it sells is making a case.\n Issuer material on this theme. Links leave ETFIQ. Source: each issuer\u2019s own site. Issuer What they publish Kind \n Roundhill Roundhill research blog Their research index \n Tema Tema ETFs insights Their research index \n Defiance Defiance Insights Their research index \n \n Where to next\n The largest memory and storage ETFs The cheapest memory and storage ETFs The memory and storage ETFs least like the S&P 500 The most concentrated memory and storage ETFs Every thematic ETF Compare two funds The vocabulary 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 ETFIQ is an independent publisher and makes no recommendations. Standards and sources \n Cite this page. ETFIQ, Memory and storage ETFs: what each one holds, data as of Oct 27, 2026. https://etfiq.com/themes/memory 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, Memory and storage ETFs: what each one holds, data as of Oct 27, 2026. https://etfiq.com/themes/memory APA ETFIQ. (Oct 27, 2026). Memory and storage ETFs: what each one holds. Retrieved from https://etfiq.com/themes/memory Markdown [Memory and storage ETFs: what each one holds (ETFIQ, Oct 27, 2026)](https://etfiq.com/themes/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":"Data ETFIQ computes is free to use with attribution: ETFIQ (etfiq.com). Issuer data stays under its owner's terms.","citation":"ETFIQ, Memory and storage ETFs: what each one holds, data as of Oct 27, 2026. https://etfiq.com/themes/memory"}