Data as of Sep 12, 2026. Both funds on the fields they both publish, from the same sources.
ITOT vs VOO: how they differ
ITOT and VOO hold 86% 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 86% of their money in the same securities at the same weight.
| Holding | ITOT | VOO |
|---|---|---|
| NVIDIA Corp. | 6.64% | 7.53% |
| Apple, Inc. | 5.82% | 6.61% |
| Microsoft Corp. | 3.80% | 4.31% |
| Amazon.com, Inc. | 3.20% | 3.63% |
| Alphabet, Inc. | 2.87% | 3.26% |
| Broadcom, Inc. | 2.45% | 2.78% |
| Alphabet, Inc. | 2.29% | 2.60% |
| Micron Technology, Inc. | 1.78% | 2.02% |
| Meta Platforms, Inc. | 1.70% | 1.92% |
| Tesla, Inc. | 1.62% | 1.84% |
| Eli Lilly & Co. | 1.30% | 1.48% |
| Advanced Micro Devices, Inc. | 1.30% | 1.47% |
| Only in ITOT | Only in VOO |
|---|---|
| Linde plc 0.33% | Linde PLC 0.37% |
| Seagate Technology Holdings plc 0.30% | Seagate Technology Holdings PLC 0.34% |
| Eaton Corp. plc 0.23% | Eaton Corp PLC 0.26% |
| Chubb Ltd. 0.17% | Chubb Ltd 0.19% |
| Trane Technologies plc 0.15% | Trane Technologies PLC 0.17% |
| Medtronic plc 0.14% | Medtronic PLC 0.16% |
| Space Exploration Technologies Corp. 0.14% | Johnson Controls International plc 0.14% |
| Johnson Controls International plc 0.12% | Royal Caribbean Cruises Ltd 0.12% |
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.
| 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 | 2497 | 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 Jun 30, 2026, 88% of the fund by weight is stocks the S&P 500 also holds, across 2497 positions, with the top ten at 32.2%.
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 12, 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, 86% of their books are the same securities at the same weight.
Other comparisons
Where to next
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 12, 2026. https://etfiq.com/compare/any/ITOT-VOO Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources