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IWB vs IYY: Differences, Returns & Fees

IWB and IYY hold 98% of their weight in the same names. Net assets on Oct 9, 2026: $49.6bn for iShares Russell 1000 ETF and $3.1bn for iShares Dow Jones U.S. ETF.

IWB costs 0.05 points a year less; their one-year returns differ by 0.2 points; IWB is 16.2 times larger.

IWB vs IYY: Differences, Returns & Fees
IWBIYY
Expense ratio0.15%0.20%
Net assets$49.6bn$3.1bn
Total return, 1 year+16.6%+16.8%
What it tracksRussell 1000 IndexDow Jones U.S. Index
Holdings in common98%
Top ten holdings, share of the fund36.1%36.4%

Holdings in common uses holdings dated Oct 9, 2026.

+16.6%
IWB total return, 1 year
+16.8%
IYY total return, 1 year
0.15%
IWB expense ratio
0.20%
IYY expense ratio

What they hold in common

By the books each fund has filed, IWB and IYY hold 98% of their money in the same securities at the same weight. Above 50%, holding both is close to holding one of them twice. Holdings dated Oct 9, 2026.

half

98% in common

Positions both hold, largest shared weight first
Holding IWB IYY
NVIDIA 7.44% 7.68%
APPLE 6.77% 6.80%
MICROSOFT 5.53% 5.50%
AMAZON.COM INC 3.54% 3.56%
ALPHABET CLASS A 2.85% 2.86%
BROADCOM INC 2.34% 2.38%
ALPHABET CLASS C 2.30% 2.29%
META PLATFORMS CLASS A 2.20% 2.19%
MICRON TECHNOLOGY 1.61% 1.61%
TESLA INC 1.56% 1.49%
ADVANCED MICRO DEVICES 1.38% 1.37%
BERKSHIRE HATHAWAY INC CLASS B 1.34% 1.33%
Only in IWB
SPOTIFY TECHNOLOGY 0.12%
NU HOLDINGS CLASS A 0.08%
RESTAURANTS BRANDS INTERNATIONAL 0.03%
SOUTHERN COPPER CORP 0.03%
ASCENDIS PHARMA 0.02%
BITMINE IMMERSION TECHNOLOGIES 0.02%
BROOKFIELD ASSET MANAGEMENT VOTING 0.02%
FORMFACTOR INC 0.02%
Only in IYY
SEAGATE TECHNOLOGY HOLDINGS PLC 0.25%
TE CONNECTIVITY PLC 0.09%
NXP SEMICONDUCTORS NV 0.08%
AMRIZE AG 0.03%
ALKERMES 0.01%
AUTOLIV 0.01%
BLACK HILLS CORP 0.01%
BRIGHTSPRING HEALTH SERVICES INC 0.01%

Check overlap with more funds →

On the same fields

IWB
iShares Russell 1000 ETF
IYY
iShares Dow Jones U.S. ETF
Where it sits Stock ETF Stock ETF
Issuer iShares iShares
What it is Tracks the Russell 1000 Tracks an index
Total return, 1 year +16.6% +16.8%
Its benchmark over the same days +16.8% (VONE) not published
Gap to its benchmark −0.1 pts vs VONE not available
Expense ratio 0.15% 0.20%
Already in the S&P 500 91.7% 92.0%
Holdings 1025 941
Net assets $49.6bn $3.1bn

IWB and IYY on the fields both publish, as of Oct 9, 2026. Source: ETFIQ.

About IWB

IWB tracks the Russell 1000. Over the year to Oct 9, 2026 it returned +16.6% with distributions reinvested, against +16.8% 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 9, 2026, 92% of the fund by weight is stocks the S&P 500 also holds, across 1,025 positions, with the top ten at 36.1%.

About IYY

IYY tracks an index. Over the year to Oct 9, 2026 it returned +16.8% with distributions reinvested. The prospectus expense ratio is 0.20% a year. By its holdings published by its issuer for Oct 9, 2026, 92% of the fund by weight is stocks the S&P 500 also holds, across 941 positions, with the top ten at 36.4%.

Questions people ask

Which returned more over the last year, IWB or IYY?
In the year to Oct 9, 2026, with distributions reinvested, IWB returned +16.6% and IYY +16.8%.
Which is cheaper, IWB or IYY?
IWB is cheaper, by 0.05 percentage points a year. That is about $5 on $10,000 held for a year. Fees come from each fund's prospectus.
How much do IWB and IYY overlap with the S&P 500?
By their latest filed holdings, 92% of IWB and 92% of IYY by weight is stocks the S&P 500 already holds.
Other comparisons
IWB vs SNPEBDYN vs IWBIWB vs USCLIWB vs SPYXIYY vs QUALIYY vs SCHBIYY vs RDVYIYY vs USMV
IWB on its own →IYY on its own →Hold both: look the portfolio through →Rankings →Standards and sources →
Where these figures came from
IWB and IYY filings on SEC EDGAR ↗IWB prospectus with the expense ratio (SEC) ↗iShares page for IWB ↗IYY prospectus with the expense ratio (SEC) ↗iShares page for IYY ↗

ETFIQ links to the documents behind every figure; a link is not an endorsement. 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.

Cite this pageCitation, APA and Markdown

ETFIQ, IWB against IYY, data as of Oct 9, 2026. https://etfiq.com/compare/any/iwb-vs-iyy

Open data

Free to use with attribution for figures ETFIQ computes; issuer data stays under its owner's terms.