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ITOT vs OEF: Differences, Returns & Fees

ITOT and OEF hold 66% of their weight in the same names. Net assets on Oct 9, 2026: $98.1bn for iShares Core S&P Total U.S. Stock Market ETF and $20.8bn for iShares S&P 100 ETF.

ITOT costs 0.17 points a year less; both returned +16.8% over a year; ITOT is 4.7 times larger.

ITOT vs OEF: Differences, Returns & Fees
ITOTOEF
Expense ratio0.03%0.20%
Net assets$98.1bn$20.8bn
Total return, 1 year+16.8%+16.8%
What it tracksS&P Total U.S. Stock MarketS&P 100
Holdings in common66%
Top ten holdings, share of the fund34.8%52.6%

Holdings in common uses holdings dated Oct 9, 2026.

+16.8%
ITOT total return, 1 year
+16.8%
OEF total return, 1 year
0.03%
ITOT expense ratio
0.20%
OEF expense ratio

What they hold in common

By the books each fund has filed, ITOT and OEF hold 66% 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

66% in common

Positions both hold, largest shared weight first
Holding ITOT OEF
NVIDIA 7.35% 11.11%
APPLE 6.51% 9.84%
MICROSOFT 5.26% 7.96%
AMAZON.COM INC 3.41% 5.16%
ALPHABET CLASS A 2.73% 4.13%
BROADCOM INC 2.28% 3.45%
ALPHABET CLASS C 2.19% 3.31%
META PLATFORMS CLASS A 2.10% 3.17%
MICRON TECHNOLOGY 1.54% 2.33%
TESLA INC 1.43% 2.16%
ADVANCED MICRO DEVICES 1.31% 1.99%
BERKSHIRE HATHAWAY INC CLASS B 1.27% 1.92%
Only in ITOT
CROWDSTRIKE HOLDINGS CLASS A 0.37%
KLA 0.34%
MARVELL TECHNOLOGY 0.32%
SPACE EXPLORATION TECHNOLOGIES COR 0.30%
AMPHENOL CORP CLASS A 0.28%
ANALOG DEVICES 0.26%
SEAGATE TECHNOLOGY HOLDINGS PLC 0.23%
EATON PLC 0.22%
Only in OEF

Check overlap with more funds →

On the same fields

ITOT
iShares Core S&P Total U.S. Stock Market ETF
OEF
iShares S&P 100 ETF
Where it sits Stock ETF Stock ETF
Issuer iShares iShares
What it is Tracks the S&P Total U.S. Stock Market Tracks an index
Total return, 1 year +16.8% +16.8%
Expense ratio 0.03% 0.20%
Already in the S&P 500 88.1% 99.9%
Holdings 2459 102
Net assets $98.1bn $20.8bn

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

About ITOT

ITOT tracks the S&P Total U.S. Stock Market. Over the year to Oct 9, 2026 it returned +16.8% with distributions reinvested. The prospectus expense ratio is 0.03% 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 2,459 positions, with the top ten at 34.8%.

About OEF

OEF tracks an index. The prospectus expense ratio is 0.20% a year. By its holdings published by its issuer for Oct 9, 2026, 100% of the fund by weight is stocks the S&P 500 also holds, across 102 positions, with the top ten at 52.6%.

Questions people ask

Which returned more over the last year, ITOT or OEF?
In the year to Oct 9, 2026, with distributions reinvested, ITOT returned +16.8% and OEF +16.8%.
Which is cheaper, ITOT or OEF?
ITOT 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 ITOT and OEF overlap with the S&P 500?
By their latest filed holdings, 88% of ITOT and 100% of OEF by weight is stocks the S&P 500 already holds.
Other comparisons
ITOT vs SPYITOT vs IVVITOT vs VOOITOT vs IWVOEF vs VIGOEF vs SCHXOEF vs VVOEF vs SPYM
ITOT on its own →OEF on its own →Hold both: look the portfolio through →Rankings →Standards and sources →
Where these figures came from
ITOT and OEF filings on SEC EDGAR ↗ITOT and OEF prospectus with the expense ratio (SEC) ↗iShares page for ITOT ↗iShares page for OEF ↗

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, ITOT against OEF, data as of Oct 9, 2026. https://etfiq.com/compare/any/itot-vs-oef

Open data

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