Data as of Sep 12, 2026. Both funds on the fields they both publish, from the same sources.
IWB vs VB: how they differ
IWB and VB hold 9% of their weight in the same names, and IWB returned more over the year.
iShares Russell 1000 ETF and Vanguard Small-Cap Index Fund.
What they hold in common
By the books each fund has filed, IWB and VB hold 9% of their money in the same securities at the same weight.
| Holding | IWB | VB |
|---|---|---|
| Astera Labs, Inc | 0.11% | 0.45% |
| FLEX LTD. | 0.09% | 0.36% |
| Credo Technology Group Holding Ltd | 0.07% | 0.55% |
| JABIL INC. | 0.06% | 0.49% |
| EMCOR GROUP, INC. | 0.05% | 0.45% |
| NATERA, INC. | 0.05% | 0.45% |
| REVOLUTION MEDICINES, INC. | 0.05% | 0.46% |
| QNITY ELECTRONICS, INC. | 0.05% | 0.21% |
| EQT CORPORATION | 0.05% | 0.20% |
| CENTENE CORPORATION | 0.05% | 0.19% |
| STEEL DYNAMICS, INC. | 0.04% | 0.19% |
| TWILIO INC. | 0.04% | 0.38% |
| Only in IWB | Only in VB |
|---|---|
| NVIDIA CORPORATION 6.73% | Moog Inc 0.15% |
| APPLE INC. 6.03% | Hut 8 Corp 0.14% |
| MICROSOFT CORPORATION 4.00% | Cytokinetics Inc 0.14% |
| AMAZON.COM, INC. 3.33% | Viasat Inc 0.14% |
| ALPHABET INC. 3.00% | BrightSpring Health Services Inc 0.14% |
| BROADCOM INC. 2.54% | MaxLinear Inc 0.13% |
| ALPHABET INC. 2.42% | Argan Inc 0.13% |
| MICRON TECHNOLOGY, INC. 1.88% | Krystal Biotech Inc 0.13% |
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.
| IWB iShares Russell 1000 ETF | VB Vanguard Small-Cap Index Fund | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | iShares | Vanguard |
| What it is | Russell 1000 | Small-Cap |
| Total return, 1 year | +16.7% | +15.2% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | −0.8 pts | −2.3 pts |
| Expense ratio | 0.15% | 0.03% |
| Already in the S&P 500 | 91.9% | 21.7% |
| Holdings | 1024 | 1311 |
IWB in plain words
IWB is an index equity fund tracking the Russell 1000. Over the year to Sep 11, 2026 it returned +16.7% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.15% a year. By its holdings filed for Jun 30, 2026, 92% of the fund by weight is stocks the S&P 500 also holds, across 1024 positions, with the top ten at 33.5%.
VB in plain words
VB is an index equity fund tracking the Small-Cap. Over the year to Sep 11, 2026 it returned +15.2% 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, 22% of the fund by weight is stocks the S&P 500 also holds, across 1311 positions, with the top ten at 4.3%. It sat 5.1% below its high of Aug 14, 2026 on Sep 11, 2026.
Questions people ask
- Which returned more over the last year, IWB or VB?
- In the year to Sep 12, 2026, with distributions reinvested, IWB returned +16.7% and VB returned +15.2%, so IWB returned more. One year is one year; the longer windows are in the table.
- Which is cheaper, IWB or VB?
- IWB charges 0.15% a year and VB charges 0.03%, so VB is cheaper. Fees come from each fund's prospectus.
- How much do IWB and VB overlap with the S&P 500?
- By their latest filed holdings, 92% of IWB and 22% of VB by weight is stocks the S&P 500 already holds. Between the two funds, 9% of their books are the same securities at the same weight.
Other comparisons
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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, IWB against VB, data as of Sep 12, 2026. https://etfiq.com/compare/any/IWB-VB Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources