# Memory and storage ETFs: 5 funds, largest first > 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. Data as of Oct 27, 2026. Rebuilt every trading night. Data as of Oct 27, 2026 . ## Memory and storage ETFs: what each one holds 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. 5 US listed memory and storage ETFs $19.2bn The largest, DRAM 0.65% The cheapest, DRAM ### The short answers 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 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. | Company | Among the ten largest of | Average weight where it is | Largest, and in which fund | | --- | --- | --- | --- | | Micron Technology Inc MU | 3 of 3 | 6.5% | 8.9% in DISK | | Sandisk Corp SNDK | 2 of 3 | 11.9% | 18.6% in DISK | | Western Digital Corp WDC | 2 of 3 | 4.1% | 4.3% in DRAM | | SK HYNIX INC | 1 of 3 | 15.9% | 15.9% in DISK | | SK hynix Inc 000660 | 1 of 3 | 15.9% | 15.9% in DRAM | | KIOXIA HOLDINGS CORP | 1 of 3 | 14.6% | 14.6% in DISK | | Samsung Electronics Co Ltd 005930 | 1 of 3 | 14.4% | 14.4% in DRAM | | Advantest Corp ATEYY | 1 of 3 | 10.0% | 10.0% in HBMX | | Penguin Solutions Inc PENG | 1 of 3 | 6.2% | 6.2% in HBMX | | CHANGXIN MEMORY TECHNOLOGIES-SWAP-MREX-L | 1 of 3 | 6.1% | 6.1% in DISK | | Onto Innovation Inc ONTO | 1 of 3 | 5.9% | 5.9% in HBMX | | Camtek Ltd/Israel CAMT | 1 of 3 | 5.2% | 5.2% in HBMX | | ASML Holding NV ASML | 1 of 3 | 5.2% | 5.2% in HBMX | | SAMSUNG ELECTRONICS CO LTD | 1 of 3 | 4.9% | 4.9% in DISK | | SK hynix Inc SKHY | 1 of 3 | 4.8% | 4.8% in HBMX | 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. ### The 5 largest memory and storage ETFs 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 . - DRAM Roundhill Memory ETF $19.2bn 0.65% - DISK Tema Memory ETF $53m 0.75% - HBMX Tuttle Capital Concentrated Memory Stack ETF $27m 0.95% - KMEM Kurv Memory Select ETF $23m 0.65% - PRAM Defiance Memory & Photonics ETF $5.4m 0.65% | Ticker | Fund | Issuer | Net assets | In the S&P 500 | Active share | Total return 1Y | vs its benchmark 1Y | Fee | | --- | --- | --- | --- | --- | --- | --- | --- | --- | | DRAM | Roundhill Memory ETF | Roundhill | $19.2bn | 15.7% | 96.8% | first traded 208 days ago | · | 0.65% | | DISK | Tema Memory ETF | Tema | $53m | 35.3% | 96.8% | first traded 119 days ago | · | 0.75% | | HBMX | Tuttle Capital Concentrated Memory Stack ETF | Tuttle | $27m | 29.1% | 94.4% | first traded 147 days ago | · | 0.95% | | KMEM | Kurv Memory Select ETF | Kurv | $23m | not yet filed | not yet filed | first traded 118 days ago | · | 0.65% | | PRAM | Defiance Memory & Photonics ETF | Defiance | $5.4m | holds a swap | holds a swap | first traded 61 days ago | · | 0.65% | ### How much of each pair is the same fund 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. | | DRAM | DISK | HBMX | | --- | --- | --- | --- | | DRAM | · | 44% | 18% | | DISK | 44% | · | 24% | | HBMX | 18% | 24% | · | 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. ### What each fund holds alone | Fund | Largest holding it alone has | Weight | All of its own names | | --- | --- | --- | --- | | DRAM | GigaDevice Semiconductor Inc 603986 | 3.1% | 3.7% | | DISK | CHANGXIN MEMORY TECHNOLOGIES-SWAP-MREX-L | 6.1% | 19.8% | | HBMX | Advantest Corp ATEYY | 10.0% | 73.2% | ### Questions people ask 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’s 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 The issuers behind these memory and storage funds publish their own work on this theme. These are their pages and words, not ETFIQ’s. A fund company writing about a theme it sells is making a case. | Issuer | What they publish | Kind | | --- | --- | --- | | Roundhill | Roundhill research blog | Their research index | | Tema | Tema ETFs insights | Their research index | | Defiance | Defiance Insights | Their research index | ### Where to next ### Sources Links are sources, not endorsements. ETFIQ is an independent publisher and makes no recommendations. Standards and sources --- Source: ETFIQ, independent ETF data. Recomputed nightly from public filings and prices. Cite: ETFIQ, Memory and storage ETFs: what each one holds, data as of Oct 27, 2026. https://etfiq.com/themes/memory Licence: https://etfiq.com/license/ Data ETFIQ computes is free to use with attribution: ETFIQ (etfiq.com). Issuer data stays under its owner's terms. HTML: https://etfiq.com/themes/memory