Data as of Oct 28, 2026.
IWB vs IWO: Differences, Returns & Fees
Over the year to Oct 28, 2026, IWB returned +13.1% to IWO's +7.9%; 0% of their weight is in the same names.
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Net assets: $49.1bn on Oct 28, 2026 for iShares Russell 1000 ETF, and $14.0bn on Oct 27, 2026 for iShares Russell 2000 Growth ETF.
Pair scorecard
IWB costs 0.09 points a year less; their one-year returns differ by 5.2 points; IWB is 3.6 times larger.
| Measure | IWB | IWO |
|---|---|---|
| Return | ||
| Total return, 1 year | +13.1% | +7.9% |
| Drawdown | ||
| Below its high | 9.9%, high on Aug 14, 2026 | |
| Benchmark | ||
| What it tracks | Russell 1000 Index | Russell 2000 Growth Index |
| Cost and size | ||
| Expense ratio | 0.15% | 0.24% |
| Net assets, as of Oct 26, 2026 | $48.7bn | $13.7bn |
| Holdings | ||
| Holdings in common | 0% | |
| Top ten holdings, share of the fund | 35.3% | 6.4% |
Holdings in common uses holdings dated Oct 27, 2026. Method
What they share
By the books each fund has filed, IWB and IWO hold 0% of their money in the same securities at the same weight. Holdings dated Oct 27, 2026.
half
0% in common
Only in one fund ↓
Side by side
IWB and IWO on the fields both publish, as of Oct 28, 2026. Source: ETFIQ.
IWB
IWB tracks the Russell 1000. Over the year to Oct 28, 2026 it returned +13.1% with distributions reinvested, against +13.2% for its benchmark, the Russell 1000 Index. The prospectus expense ratio is 0.15% a year. By its holdings published by its issuer for Oct 27, 2026, 92% of the fund by weight is stocks the S&P 500 also holds, across 1,025 positions, with the top ten at 35.3%.
IWO
IWO tracks the Russell 2000 Growth. Over the year to Oct 28, 2026 it returned +7.9% with distributions reinvested, against +8.0% for its benchmark, the Russell 2000 Growth Index. The prospectus expense ratio is 0.24% a year. By its holdings published by its issuer for Oct 27, 2026, 0% of the fund by weight is stocks the S&P 500 also holds, across 1,122 positions, with the top ten at 6.4%. It sat 9.9% below its high of Aug 14, 2026 on Oct 28, 2026.
Questions people ask
- Which returned more over the last year, IWB or IWO?
- In the year to Oct 28, 2026, with distributions reinvested, IWB returned +13.1% and IWO +7.9%.
- Which is cheaper, IWB or IWO?
- IWB is cheaper, by 0.09 percentage points a year. That is about $9 on $10,000 held for a year. Fees come from each fund's prospectus.
Links are sources, not endorsements. A comparison is not a recommendation.
How this is computed
Overlap adds up the smaller of the two weights for each security both funds hold.
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ETFIQ, IWB against IWO, data as of Oct 28, 2026. https://etfiq.com/compare/any/iwb-vs-iwo
ETFIQ. (Oct 28, 2026). IWB against IWO. Retrieved from https://etfiq.com/compare/any/iwb-vs-iwo
[IWB against IWO (ETFIQ, Oct 28, 2026)](https://etfiq.com/compare/any/iwb-vs-iwo)
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