Data as of Sep 13, 2026. Both funds on the fields they both publish, from the same sources.
IGM vs VOO: how they differ
IGM and VOO hold 0% of their weight in the same names, and IGM returned more over the year.
iShares Expanded Tech Sector ETF and Vanguard 500 Index Fund.
What they hold in common
By the books each fund has filed, IGM and VOO hold 0% of their money in the same securities at the same weight.
| Only in IGM | Only in VOO |
|---|---|
| MICROSOFT 10.11% | NVIDIA Corp 7.53% |
| APPLE 9.14% | Apple Inc 6.61% |
| NVIDIA 8.89% | Microsoft Corp 4.31% |
| BROADCOM INC 7.42% | Amazon.com Inc 3.63% |
| META PLATFORMS CLASS A 4.87% | Alphabet Inc 3.26% |
| MICRON TECHNOLOGY 4.73% | Broadcom Inc 2.78% |
| ALPHABET CLASS A 4.23% | Alphabet Inc 2.60% |
| ADVANCED MICRO DEVICES 3.66% | 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.
| IGM iShares Expanded Tech Sector ETF | VOO Vanguard 500 Index Fund | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | iShares | Vanguard |
| What it is | Expanded Tech Sector | S&P 500 |
| Total return, 1 year | +32.7% | +17.6% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | +15.2 pts | +0.1 pts |
| Expense ratio | 0.37% | 0.03% |
| Already in the S&P 500 | 92.0% | 100.0% |
| Holdings | 272 | 506 |
IGM in plain words
IGM is an index equity fund tracking the Expanded Tech Sector. Over the year to Sep 11, 2026 it returned +32.7% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.37% a year. By its holdings filed for Sep 10, 2026, 92% of the fund by weight is stocks the S&P 500 also holds, across 272 positions, with the top ten at 58.6%. It sat 5.1% below its high of Jun 2, 2026 on Sep 11, 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, IGM or VOO?
- In the year to Sep 13, 2026, with distributions reinvested, IGM returned +32.7% and VOO returned +17.6%, so IGM returned more. One year is one year; the longer windows are in the table.
- Which is cheaper, IGM or VOO?
- IGM charges 0.37% a year and VOO charges 0.03%, so VOO is cheaper. Fees come from each fund's prospectus.
- How much do IGM and VOO overlap with the S&P 500?
- By their latest filed holdings, 92% of IGM 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, IGM against VOO, data as of Sep 13, 2026. https://etfiq.com/compare/any/igm-vs-voo Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources