# The largest thematic ETFs

> SMH leads the largest thematic ETFs at $66.6bn (net assets), as of Oct 27, 2026. The largest thematic ETFs, ranked by net assets.

Data as of Oct 27, 2026. Rebuilt every trading night.

As of Oct 27, 2026 . Rebuilt every trading night.

## The largest thematic ETFs

See 15 funds ranked by net assets. Updated Oct 27, 2026. Before buying a thematic fund beside an index fund, ask how much of it the S&P 500 already holds.

| # | Ticker | Fund | Theme | Net assets | Weight in S&P 500 companies | Fee | Source |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | SMH | VanEck Semiconductor ETF | Semiconductors | $66.6bn | 79.3% | 0.35% | ETFIQ, shares × NAV, Oct 23, 2026 |
| 2 | SOXX | iShares Semiconductor ETF | Semiconductors | $46.4bn | 74.5% | 0.33% | Issuer daily, Oct 26, 2026 |
| 3 | GDX | VanEck Gold Miners ETF | Gold miners | $24.7bn | 11.7% | 0.51% | ETFIQ, shares × NAV, Oct 23, 2026 |
| 4 | DRAM | Roundhill Memory ETF | Memory and storage | $19.2bn | 15.7% | 0.65% | Issuer daily, Oct 27, 2026 |
| 5 | CIBR | First Trust NASDAQ Cybersecurity ETF | Cybersecurity | $18.8bn | 60.6% | 0.58% | Issuer page, Oct 26, 2026 |
| 6 | IGV | iShares Expanded Tech-Software Secto | Cloud and software | $14.3bn | 80.1% | 0.38% | Issuer daily, Oct 26, 2026 |
| 7 | PAVE | Global X U.S. Infrastructure Develop | Infrastructure | $13.6bn | 62.1% | 0.47% | Issuer page, Oct 12, 2026 |
| 8 | BAI | iShares A.I. Innovation and Tech Act | Artificial intelligence | $13.2bn | 54.9% | 0.55% | Issuer daily, Oct 27, 2026 |
| 9 | ITA | iShares U.S. Aerospace & Defense ETF | Defense | $12.0bn | 81.2% | 0.37% | Issuer daily, Oct 27, 2026 |
| 10 | GRID | First Trust NASDAQ Clean Edge Smart | Electrification and the grid | $11.1bn | 40.9% | 0.56% | Issuer page, Oct 26, 2026 |
| 11 | IGF | iShares Global Infrastructure ETF | Infrastructure | $10.8bn | 31.8% | 0.37% | Issuer daily, Oct 26, 2026 |
| 12 | IBB | iShares Biotechnology ETF | Biotech | $10.7bn | 40.4% | 0.44% | Issuer daily, Oct 26, 2026 |
| 13 | AIQ | Global X Artificial Intelligence & T | Artificial intelligence | $10.6bn | 64.7% | 0.68% | Issuer page, Oct 12, 2026 |
| 14 | XBI | State Street SPDR S&P Biotech ETF | Biotech | $10.2bn | 13.4% | 0.35% | Issuer daily, Oct 26, 2026 |
| 15 | AIRR | First Trust RBA American Industrial | Reshoring and manufacturing | $8.2bn | 14.7% | 0.69% | Issuer page, Oct 26, 2026 |

### Method

Ranked on the most recent net assets ETFIQ can source for each fund, with the kind of source named beside it. Size shows where the money is, not what a fund did. The list sorts one published number, with no scoring or weighting. Every fund ETFIQ covers in this category is eligible, closed funds included.

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### Sources

Links are sources, not endorsements.

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 largest thematic ETFs, ranked by net assets, data as of Oct 27, 2026. https://etfiq.com/rankings/themes-biggest
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.
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