# The most concentrated memory and storage ETFs

> 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.

Data as of Oct 20, 2026. Rebuilt every trading night.

As of Oct 20, 2026 . Rebuilt every trading night.

## The most concentrated memory and storage ETFs

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.

| # | Ticker | Fund | Top ten weight | Holdings | Net assets | Total return, 1Y |
| --- | --- | --- | --- | --- | --- | --- |
| 1 | DISK | Tema Memory ETF | 85.8% | 17 | $55m | too new |
| 2 | HBMX | Tuttle Capital Concentrated Memory Stack | 59.2% | 23 | $27m | too new |
| 3 | DRAM | Roundhill Memory ETF | 56.4% | 12 | $18.6bn | too new |

### Method

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.

### Where to next

### Where these figures came from

ETFIQ links to the documents behind every figure; a link is not an endorsement.

A ranking is not a recommendation or an opinion. ETFIQ is an independent publisher, not an adviser. Standards and sources

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Source: ETFIQ, independent ETF data. Recomputed nightly from public filings and prices.
Cite: 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
Licence: https://etfiq.com/license/ Figures ETFIQ computes are free to use with attribution: ETFIQ (etfiq.com). Issuer data stays under its owner's terms.
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