Data as of Sep 12, 2026. Both funds on the fields they both publish, from the same sources.
IWB vs RSP: how they differ
IWB and RSP hold 42% of their weight in the same names, and IWB returned more over the year.
iShares Russell 1000 ETF and Invesco S&P 500 Equal Weight ETF.
What they hold in common
By the books each fund has filed, IWB and RSP hold 42% of their money in the same securities at the same weight.
| Holding | IWB | RSP |
|---|---|---|
| INTEL CORPORATION | 0.88% | 0.38% |
| ADVANCED MICRO DEVICES, INC. | 1.36% | 0.33% |
| SANDISK CORPORATION | 0.48% | 0.32% |
| WESTERN DIGITAL CORPORATION | 0.31% | 0.31% |
| TEXAS INSTRUMENTS INCORPORATED | 0.39% | 0.27% |
| QUALCOMM INCORPORATED | 0.28% | 0.26% |
| UNITEDHEALTH GROUP INCORPORATED | 0.54% | 0.25% |
| GE VERNOVA INC. | 0.46% | 0.25% |
| ANALOG DEVICES, INC. | 0.28% | 0.24% |
| CATERPILLAR INC. | 0.70% | 0.24% |
| AMAZON.COM, INC. | 3.33% | 0.24% |
| ARISTA NETWORKS, INC. | 0.26% | 0.24% |
| Only in IWB | Only in RSP |
|---|---|
| MARVELL TECHNOLOGY, INC. 0.37% | Seagate Technology Holdings PLC 0.34% |
| SPACE EXPLORATION TECHNOLOGIES CORP. 0.13% | NXP Semiconductors N.V. 0.28% |
| SNOWFLAKE INC. 0.12% | Coterra Energy Inc. 0.22% |
| BLOOM ENERGY CORPORATION 0.12% | Paramount Skydance Corp. 0.20% |
| CLOUDFLARE, INC. 0.11% | TE Connectivity PLC 0.20% |
| Astera Labs, Inc 0.11% | Carnival Corp. 0.20% |
| SPOTIFY TECHNOLOGY S.A. 0.10% | DuPont de Nemours, Inc. 0.19% |
| HONEYWELL INTERNATIONAL INCORPORATION 0.10% | Erie Indemnity Co. 0.17% |
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.
| IWB iShares Russell 1000 ETF | RSP Invesco S&P 500 Equal Weight ETF | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | iShares | Invesco |
| What it is | Russell 1000 | S&P 500 equal weight |
| Total return, 1 year | +16.7% | +14.8% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | −0.8 pts | −2.7 pts |
| Expense ratio | 0.15% | 0.20% |
| Already in the S&P 500 | 91.9% | 99.1% |
| Holdings | 1024 | 503 |
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%.
RSP in plain words
RSP is an index equity fund tracking the S&P 500 equal weight. Over the year to Sep 11, 2026 it returned +14.8% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.20% a year. By its holdings filed for Apr 30, 2026, 99% of the fund by weight is stocks the S&P 500 also holds, across 503 positions, with the top ten at 3.2%. It sat 3.5% below its high of Aug 14, 2026 on Sep 11, 2026.
Questions people ask
- Which returned more over the last year, IWB or RSP?
- In the year to Sep 12, 2026, with distributions reinvested, IWB returned +16.7% and RSP returned +14.8%, so IWB returned more. One year is one year; the longer windows are in the table.
- Which is cheaper, IWB or RSP?
- IWB charges 0.15% a year and RSP charges 0.20%, so IWB is cheaper. Fees come from each fund's prospectus.
- How much do IWB and RSP overlap with the S&P 500?
- By their latest filed holdings, 92% of IWB and 99% of RSP by weight is stocks the S&P 500 already holds. Between the two funds, 42% 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 RSP, data as of Sep 12, 2026. https://etfiq.com/compare/any/IWB-RSP Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources