Data as of Sep 12, 2026. Both funds on the fields they both publish, from the same sources.
IWB vs VXF: how they differ
IWB and VXF hold 8% of their weight in the same names, and IWB returned more over the year.
iShares Russell 1000 ETF and Vanguard Extended Market Index Fund.
What they hold in common
By the books each fund has filed, IWB and VXF hold 8% of their money in the same securities at the same weight.
| Holding | IWB | VXF |
|---|---|---|
| SPACE EXPLORATION TECHNOLOGIES CORP. | 0.13% | 1.19% |
| SNOWFLAKE INC. | 0.12% | 1.03% |
| BLOOM ENERGY CORPORATION | 0.12% | 0.93% |
| CLOUDFLARE, INC. | 0.11% | 0.92% |
| Astera Labs, Inc | 0.11% | 0.76% |
| ROCKET LAB CORPORATION | 0.08% | 0.61% |
| CHENIERE ENERGY, INC. | 0.07% | 0.59% |
| FERGUSON ENTERPRISES INC. | 0.07% | 0.54% |
| Credo Technology Group Holding Ltd | 0.07% | 0.52% |
| ALNYLAM PHARMACEUTICALS, INC. | 0.06% | 0.47% |
| NATERA, INC. | 0.05% | 0.46% |
| REVOLUTION MEDICINES, INC. | 0.05% | 0.44% |
| Only in IWB | Only in VXF |
|---|---|
| NVIDIA CORPORATION 6.73% | Amrize Ltd 0.32% |
| APPLE INC. 6.03% | Viasat Inc 0.14% |
| MICROSOFT CORPORATION 4.00% | Moog Inc 0.14% |
| AMAZON.COM, INC. 3.33% | Cytokinetics Inc 0.14% |
| ALPHABET INC. 3.00% | Hut 8 Corp 0.14% |
| BROADCOM INC. 2.54% | Argan Inc 0.13% |
| ALPHABET INC. 2.42% | BrightSpring Health Services Inc 0.13% |
| MICRON TECHNOLOGY, INC. 1.88% | MaxLinear 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 | VXF Vanguard Extended Market Index Fund | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | iShares | Vanguard |
| What it is | Russell 1000 | Extended Market |
| Total return, 1 year | +16.7% | +14.1% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | −0.8 pts | −3.4 pts |
| Expense ratio | 0.15% | 0.05% |
| Already in the S&P 500 | 91.9% | 0.0% |
| Holdings | 1024 | 3365 |
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%.
VXF in plain words
VXF is an index equity fund tracking the Extended Market. Over the year to Sep 11, 2026 it returned +14.1% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.05% a year. By its holdings filed for Jun 30, 2026, 0% of the fund by weight is stocks the S&P 500 also holds, across 3365 positions, with the top ten at 7.6%. 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 VXF?
- In the year to Sep 12, 2026, with distributions reinvested, IWB returned +16.7% and VXF returned +14.1%, so IWB returned more. One year is one year; the longer windows are in the table.
- Which is cheaper, IWB or VXF?
- IWB charges 0.15% a year and VXF charges 0.05%, so VXF is cheaper. Fees come from each fund's prospectus.
- How much do IWB and VXF overlap with the S&P 500?
- By their latest filed holdings, 92% of IWB and 0% of VXF by weight is stocks the S&P 500 already holds. Between the two funds, 8% 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, IWB against VXF, data as of Sep 12, 2026. https://etfiq.com/compare/any/IWB-VXF Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources