Data as of Sep 13, 2026. Both funds on the fields they both publish, from the same sources.
ITOT vs VOO: how they differ
ITOT and VOO hold 0% of their weight in the same names.
iShares Core S&P Total U.S. Stock Market ETF and Vanguard 500 Index Fund.
What they hold in common
By the books each fund has filed, ITOT and VOO hold 0% of their money in the same securities at the same weight.
| Only in ITOT | Only in VOO |
|---|---|
| NVIDIA 7.32% | NVIDIA Corp 7.53% |
| APPLE 6.63% | Apple Inc 6.61% |
| MICROSOFT 5.06% | Microsoft Corp 4.31% |
| AMAZON.COM INC 3.41% | Amazon.com Inc 3.63% |
| ALPHABET CLASS A 2.70% | Alphabet Inc 3.26% |
| BROADCOM INC 2.37% | Broadcom Inc 2.78% |
| ALPHABET CLASS C 2.16% | Alphabet Inc 2.60% |
| META PLATFORMS CLASS A 1.96% | 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 10, 2026.
| ITOT iShares Core S&P Total U.S. Stock Market ETF | VOO Vanguard 500 Index Fund | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | iShares | Vanguard |
| What it is | Core S&P Total U.S. Stock Market | S&P 500 |
| Total return, 1 year | +17.2% | +17.6% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | −0.3 pts | +0.1 pts |
| Expense ratio | 0.03% | 0.03% |
| Already in the S&P 500 | 88.3% | 100.0% |
| Holdings | 1167 | 506 |
ITOT in plain words
ITOT is an index equity fund tracking the Core S&P Total U.S. Stock Market. Over the year to Sep 11, 2026 it returned +17.2% 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 Sep 10, 2026, 88% of the fund by weight is stocks the S&P 500 also holds, across 1167 positions, with the top ten at 34.6%.
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. 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, ITOT or VOO?
- In the year to Sep 13, 2026, with distributions reinvested, ITOT returned +17.2% and VOO returned +17.6%, so VOO returned more. One year is one year; the longer windows are in the table.
- Which is cheaper, ITOT or VOO?
- ITOT charges 0.03% a year and VOO charges 0.03%, so ITOT is cheaper. Fees come from each fund's prospectus.
- How much do ITOT and VOO overlap with the S&P 500?
- By their latest filed holdings, 88% of ITOT 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.
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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, ITOT against VOO, data as of Sep 13, 2026. https://etfiq.com/compare/any/itot-vs-voo Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources