Data as of Sep 13, 2026. Both funds on the fields they both publish, from the same sources.
QTUM vs VOO: how they differ
Over the year QTUM returned more, +50.4% against +17.6%, and VOO charges 0.03% against 0.40%.
Defiance Quantum ETF and Vanguard 500 Index Fund.
What they hold in common
By the books each fund has filed, QTUM and VOO hold 0% of their money in the same securities at the same weight.
| Only in QTUM | Only in VOO |
|---|---|
| Arqit Quantum Inc 1.82% | NVIDIA Corp 7.53% |
| Global Unichip Corp 1.82% | Apple Inc 6.61% |
| Horizon Quantum Holdings Ltd 1.81% | Microsoft Corp 4.31% |
| Cloudflare Inc 1.66% | Amazon.com Inc 3.63% |
| Elastic Nv 1.63% | Alphabet Inc 3.26% |
| Snowflake Inc 1.63% | Broadcom Inc 2.78% |
| Hewlett Packard Enterprise Co 1.62% | Alphabet Inc 2.60% |
| Nutanix Inc 1.58% | Micron Technology Inc 2.02% |
Weight overlap is an ETFIQ calculation: for every security both funds hold, the smaller of the two weights, summed. Above 50%, holding both is close to holding one of them twice. Holdings dated Jun 30, 2026 and Sep 14, 2026.
| QTUM Defiance Quantum ETF | VOO Vanguard 500 Index Fund | |
|---|---|---|
| Where it sits | Thematic ETF | Core index fund |
| Issuer | Defiance | Vanguard |
| What it is | Quantum computing | S&P 500 |
| Total return, 1 year | +50.4% | +17.6% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | +32.9 pts | +0.1 pts |
| Expense ratio | 0.40% | 0.03% |
| Already in the S&P 500 | 34.8% | 100.0% |
| Holdings | 89 | 506 |
QTUM in plain words
By weight, 35% of QTUM's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 83%. The top ten holdings are 17% of the fund across 89 positions, as published by its issuer for Sep 14, 2026. Over the year to Sep 11, 2026 the fund returned +50.4% with distributions reinvested against +17.5% for the S&P 500, so a holder was ahead by 32.9 pts. It sits 12.5% below its all-time high of Jun 2, 2026.
VOO in plain words
VOO is an index equity fund tracking the S&P 500. Over the year to Sep 11, 2026 it returned +17.6% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.03% a year. By its holdings filed for Jun 30, 2026, 100% of the fund by weight is stocks the S&P 500 also holds, across 506 positions, with the top ten at 36.5%.
Questions people ask
- Which returned more over the last year, QTUM or VOO?
- In the year to Sep 13, 2026, with distributions reinvested, QTUM returned +50.4% and VOO returned +17.6%, so QTUM returned more. One year is one year; the longer windows are in the table.
- Which is cheaper, QTUM or VOO?
- QTUM charges 0.40% a year and VOO charges 0.03%, so VOO is cheaper. Fees come from each fund's prospectus.
- How much do QTUM and VOO overlap with the S&P 500?
- By their latest filed holdings, 35% of QTUM and 100% of VOO by weight is stocks the S&P 500 already holds. Between the two funds, 0% of their books are the same securities at the same weight.
- Are QTUM and VOO the same kind of fund?
- No. QTUM is a thematic ETF and VOO is an index ETF, so they are built for different jobs. The table compares what both publish: return, cost and what each actually holds.
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Where these figures came from
ETFIQ links to the documents behind every figure. It is not affiliated with any issuer, and a link is not an endorsement.
Cite this page. ETFIQ, QTUM against VOO, data as of Sep 13, 2026. https://etfiq.com/compare/any/qtum-vs-voo Free to use with attribution; the underlying files are at Open data.
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