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IWV vs VOO: Differences, Returns & Fees

IWV and VOO hold 88% of their weight in the same names, and VOO returned +17.3% over the year. Net assets: $20.6bn on Oct 9, 2026 for iShares Russell 3000 ETF, and $1.0tn on Sep 30, 2026 for Vanguard S&P 500 ETF.

VOO costs 0.17 points a year less; their one-year returns differ by 0.6 points; VOO is far larger, $1.0tn against $20.3bn.

IWV vs VOO: Differences, Returns & Fees
IWVVOO
Expense ratio0.20%0.03%
Net assets, as of Sep 30, 2026$20.3bn$1.0tn
Total return, 1 year+16.7%+17.3%
What it tracksRussell 3000 IndexS&P 500 Index
Holdings in common88%
Top ten holdings, share of the fund34.7%37.8%

Holdings in common uses holdings dated Aug 31, 2026 and Oct 9, 2026.

+16.7%
IWV total return, 1 year
+17.3%
VOO total return, 1 year
0.20%
IWV expense ratio
0.03%
VOO expense ratio

What they hold in common

By the books each fund has filed, IWV and VOO hold 88% 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 Aug 31, 2026 and Oct 9, 2026.

half

88% in common

Positions both hold, largest shared weight first
Holding IWV VOO
NVIDIA 7.15% 8.09%
APPLE 6.51% 7.04%
MICROSOFT 5.32% 5.70%
AMAZON.COM INC 3.40% 3.85%
ALPHABET CLASS A 2.74% 3.01%
BROADCOM INC 2.25% 2.65%
ALPHABET CLASS C 2.21% 2.40%
META PLATFORMS CLASS A 2.11% 1.90%
MICRON TECHNOLOGY 1.55% 1.64%
TESLA INC 1.49% 1.57%
BERKSHIRE HATHAWAY INC CLASS B 1.28% 1.40%
ELI LILLY 1.26% 1.38%
Only in IWV
SNOWFLAKE 0.17%
CLOUDFLARE CLASS A 0.15%
SPACE EXPLORATION TECHNOLOGIES COR 0.13%
SPOTIFY TECHNOLOGY 0.11%
BLOOM ENERGY CLASS A 0.10%
CHENIERE ENERGY 0.08%
ASTERA LABS 0.07%
NATERA 0.07%
Only in VOO
Seagate Technology Holdings PLC 0.28%
Warner Bros Discovery Inc 0.11%
TE Connectivity PLC 0.09%
NXP Semiconductors NV 0.09%
MKTLIQ 0.05%
Erie Indemnity Co 0.01%
Paramount Skydance Corp 0.01%
SLBBH1142 0.00%

Check overlap with more funds →

On the same fields

IWV
iShares Russell 3000 ETF
VOO
Vanguard S&P 500 ETF
Where it sits Stock ETF Stock ETF
Issuer iShares Vanguard
What it is Tracks an index Tracks the S&P 500
Total return, 1 year +16.7% +17.3%
Its benchmark over the same days +16.8% (VTHR) +17.3% (IVV)
Gap to its benchmark −0.1 pts vs VTHR 0.0 pts vs IVV
Expense ratio 0.20% 0.03%
Already in the S&P 500 87.8% 99.7%
Holdings 2600 507
Net assets, IWV as of Oct 9, 2026 and VOO as of Sep 30, 2026 $20.6bn $1.0tn

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

About IWV

IWV tracks an index. Over the year to Oct 9, 2026 it returned +16.7% with distributions reinvested, against +16.8% for its benchmark, the Russell 3000 Index. The prospectus expense ratio is 0.20% a year. By its holdings published by its issuer for Oct 9, 2026, 88% of the fund by weight is stocks the S&P 500 also holds, across 2,600 positions, with the top ten at 34.7%.

About VOO

VOO tracks the S&P 500. Over the year to Oct 9, 2026 it returned +17.3% with distributions reinvested, against +17.3% for its benchmark, the S&P 500 Index. The prospectus expense ratio is 0.03% a year. By its holdings published by its issuer as of Aug 31, 2026, 100% of the fund by weight is stocks the S&P 500 also holds, across 507 positions, with the top ten at 37.8%.

Questions people ask

Which returned more over the last year, IWV or VOO?
In the year to Oct 9, 2026, with distributions reinvested, IWV returned +16.7% and VOO +17.3%.
Which is cheaper, IWV or VOO?
VOO is cheaper, by 0.17 percentage points a year. That is about $17 on $10,000 held for a year. Fees come from each fund's prospectus.
How much do IWV and VOO overlap with the S&P 500?
By their latest filed holdings, 88% of IWV and 100% of VOO by weight is stocks the S&P 500 already holds.
Other comparisons
IVV vs IWVIWV vs SPYIWV vs VTIIWV vs VIGOEF vs VOOMTUM vs VOOSPHQ vs VOOSPMO vs VOO
IWV on its own →VOO on its own →Hold both: look the portfolio through →Rankings →Standards and sources →
Where these figures came from
IWV filings on SEC EDGAR ↗IWV prospectus with the expense ratio (SEC) ↗iShares page for IWV ↗VOO filings on SEC EDGAR ↗VOO prospectus with the expense ratio (SEC) ↗Vanguard page for VOO ↗

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, IWV against VOO, data as of Oct 9, 2026. https://etfiq.com/compare/any/iwv-vs-voo

Open data

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