Data as of Sep 12, 2026. Both funds on the fields they both publish, from the same sources.
IYW vs VOO: how they differ
IYW and VOO hold 44% of their weight in the same names, and IYW returned more over the year.
iShares U.S. Technology ETF and Vanguard 500 Index Fund.
What they hold in common
By the books each fund has filed, IYW and VOO hold 44% of their money in the same securities at the same weight.
| Holding | IYW | VOO |
|---|---|---|
| NVIDIA CORPORATION | 16.25% | 7.53% |
| APPLE INC. | 13.65% | 6.61% |
| MICROSOFT CORPORATION | 3.99% | 4.31% |
| ALPHABET INC. | 7.84% | 3.26% |
| BROADCOM INC. | 3.78% | 2.78% |
| ALPHABET INC. | 6.34% | 2.60% |
| MICRON TECHNOLOGY, INC. | 2.98% | 2.02% |
| META PLATFORMS, INC. | 2.81% | 1.92% |
| ADVANCED MICRO DEVICES, INC. | 3.50% | 1.47% |
| INTEL CORPORATION | 2.56% | 1.03% |
| APPLIED MATERIALS, INC. | 1.92% | 0.89% |
| LAM RESEARCH CORPORATION | 1.99% | 0.84% |
| Only in IYW | Only in VOO |
|---|---|
| CLOUDFLARE, INC. 0.39% | Amazon.com Inc 3.63% |
| STRATEGY INC 0.32% | Tesla Inc 1.84% |
| SNOWFLAKE INC. 0.28% | Eli Lilly & Co 1.48% |
| ZOOM COMMUNICATIONS, INC. 0.16% | Berkshire Hathaway Inc 1.43% |
| Astera Labs, Inc 0.15% | JPMorgan Chase & Co 1.26% |
| Everpure, Inc 0.14% | Johnson & Johnson 0.95% |
| ENTEGRIS, INC. 0.13% | Exxon Mobil Corp 0.88% |
| TWILIO INC. 0.13% | Visa Inc 0.87% |
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 Apr 30, 2026 and Jun 30, 2026.
| IYW iShares U.S. Technology ETF | VOO Vanguard 500 Index Fund | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | iShares | Vanguard |
| What it is | U.S. Technology | S&P 500 |
| Total return, 1 year | +34.9% | +17.6% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | +17.4 pts | +0.1 pts |
| Expense ratio | 0.37% | 0.03% |
| Already in the S&P 500 | 95.5% | 100.0% |
| Holdings | 139 | 506 |
IYW in plain words
IYW is an index equity fund tracking the U.S. Technology. Over the year to Sep 11, 2026 it returned +34.9% 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 Apr 30, 2026, 96% of the fund by weight is stocks the S&P 500 also holds, across 139 positions, with the top ten at 63.7%.
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, IYW or VOO?
- In the year to Sep 12, 2026, with distributions reinvested, IYW returned +34.9% and VOO returned +17.6%, so IYW returned more. One year is one year; the longer windows are in the table.
- Which is cheaper, IYW or VOO?
- IYW charges 0.37% a year and VOO charges 0.03%, so VOO is cheaper. Fees come from each fund's prospectus.
- How much do IYW and VOO overlap with the S&P 500?
- By their latest filed holdings, 96% of IYW and 100% of VOO by weight is stocks the S&P 500 already holds. Between the two funds, 44% 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, IYW against VOO, data as of Sep 12, 2026. https://etfiq.com/compare/any/IYW-VOO Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources