Data as of Sep 13, 2026. Both funds on the fields they both publish, from the same sources.
IWB vs MTUM: how they differ
IWB and MTUM hold 27% of their weight in the same names, and MTUM returned more over the year.
iShares Russell 1000 ETF and iShares MSCI USA Momentum Factor ETF.
What they hold in common
By the books each fund has filed, IWB and MTUM hold 27% of their money in the same securities at the same weight.
| Holding | IWB | MTUM |
|---|---|---|
| ALPHABET CLASS A | 2.77% | 2.69% |
| ALPHABET CLASS C | 2.24% | 2.13% |
| MICRON TECHNOLOGY | 1.57% | 5.20% |
| ADVANCED MICRO DEVICES | 1.17% | 5.39% |
| EXXONMOBIL HOLDINGS CORP | 0.98% | 2.69% |
| JOHNSON & JOHNSON | 0.92% | 3.38% |
| INTEL CORPORATION | 0.65% | 4.14% |
| CISCO SYSTEMS INC | 0.61% | 3.48% |
| CHEVRON | 0.56% | 1.52% |
| LAM RESEARCH | 0.53% | 2.31% |
| CATERPILLAR INC | 0.52% | 2.14% |
| APPLIED MATERIAL INC | 0.51% | 2.87% |
| Only in IWB | Only in MTUM |
|---|---|
| NVIDIA 7.26% | SEAGATE TECHNOLOGY HOLDINGS PLC 2.35% |
| APPLE 6.73% | |
| MICROSOFT 5.21% | |
| AMAZON.COM INC 3.49% | |
| BROADCOM INC 2.40% | |
| META PLATFORMS CLASS A 2.02% | |
| TESLA INC 1.52% | |
| BERKSHIRE HATHAWAY INC CLASS B 1.35% |
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 Sep 10, 2026.
| IWB iShares Russell 1000 ETF | MTUM iShares MSCI USA Momentum Factor ETF | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | iShares | iShares |
| What it is | Russell 1000 | MSCI USA Momentum Factor |
| Total return, 1 year | +16.7% | +21.8% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | −0.8 pts | +4.3 pts |
| Expense ratio | 0.15% | 0.15% |
| Already in the S&P 500 | 91.9% | 98.2% |
| Holdings | 945 | 128 |
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 Sep 10, 2026, 92% of the fund by weight is stocks the S&P 500 also holds, across 945 positions, with the top ten at 35.2%.
MTUM in plain words
MTUM is an index equity fund tracking the MSCI USA Momentum Factor. Over the year to Sep 11, 2026 it returned +21.8% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. By its holdings filed for Sep 10, 2026, 98% of the fund by weight is stocks the S&P 500 also holds, across 128 positions, with the top ten at 35.3%. It sat 11.1% below its high of Jun 22, 2026 on Sep 11, 2026.
Questions people ask
- Which returned more over the last year, IWB or MTUM?
- In the year to Sep 13, 2026, with distributions reinvested, IWB returned +16.7% and MTUM returned +21.8%, so MTUM returned more. One year is one year; the longer windows are in the table.
- Which is cheaper, IWB or MTUM?
- IWB charges 0.15% a year and MTUM charges 0.15%, so IWB is cheaper. Fees come from each fund's prospectus.
- How much do IWB and MTUM overlap with the S&P 500?
- By their latest filed holdings, 92% of IWB and 98% of MTUM by weight is stocks the S&P 500 already holds. Between the two funds, 27% 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 MTUM, data as of Sep 13, 2026. https://etfiq.com/compare/any/iwb-vs-mtum Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources