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Data as of Oct 28, 2026.

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Across categories

DFUS vs IBB: Differences, Returns & Fees

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Over the year to Oct 28, 2026, DFUS returned +13.8% to IBB's +37.5%, and DFUS charges 0.09% to IBB's 0.44%.

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Net assets: $20.9bn on Jul 31, 2026 for Dimensional U.S. Equity Market ETF, and $11.0bn on Oct 27, 2026 for iShares Biotechnology ETF.

DFUS on its own →IBB on its own →
At a glance
+13.8%
DFUS total return, 1 year
+37.5%
IBB total return, 1 year
0.09%
DFUS expense ratio
0.44%
IBB expense ratio

Pair scorecard

DFUS costs 0.35 points a year less; their one-year returns differ by 23.7 points.

DFUS vs IBB: Differences, Returns & Fees
MeasureDFUSIBB
Return
Total return, 1 year+13.8%+37.5%
Benchmark
What it tracksNo index, actively managedBiotech
Cost and size
Expense ratio0.09%0.44%
Net assets, DFUS as of Jul 31, 2026 and IBB as of Oct 27, 2026$20.9bn$11.0bn
Active share vs the S&P 50099%
Holdings
Holdings in common2%
Top ten holdings, share of the fund34.6%50%

Holdings in common uses holdings dated Jul 31, 2026 and Oct 27, 2026. Method

What they share

2%

By the books each fund has filed, DFUS and IBB hold 2% of their money in the same securities at the same weight. Holdings dated Jul 31, 2026 and Oct 27, 2026.

0 half 100%

half

2% in common

Positions both hold · largest shared weight first DFUS IBB
AMGEN INC. 0.30% 8.20%
GILEAD SCIENCES, INC. 0.24% 8.56%
VERTEX PHARMACEUTICALS INCORPORATED 0.18% 7.53%
REGENERON PHARMACEUTICALS, INC. 0.11% 5.64%
NATERA, INC. 0.05% 3.85%
REVOLUTION MEDICINES, INC. 0.05% 2.50%
ILLUMINA, INC. 0.04% 2.93%
BIOGEN INC. 0.04% 2.58%
ALNYLAM PHARMACEUTICALS, INC. 0.04% 2.11%
INSMED INCORPORATED 0.03% 1.42%
INCYTE CORPORATION 0.03% 1.63%
UNITED THERAPEUTICS CORPORATION 0.03% 1.71%
Only in one fund ↓
Only in DFUS
NVIDIA CORPORATION 6.75%
APPLE INC. 6.45%
MICROSOFT CORPORATION 4.99%
AMAZON.COM, INC. 3.83%
ALPHABET INC. 3.00%
BROADCOM INC. 2.63%
ALPHABET INC. 2.48%
META PLATFORMS, INC. 1.77%
Only in IBB
ARGENX SE ADR 3.42%
BEONE MEDICINES AG 2.15%
GENMAB SPONSORED ADR 1.72%
CHARLES RIVER LABORATORIES INTERNA 1.18%
ASCENDIS PHARMA 1.06%
TWIST BIOSCIENCE 0.71%
PROTAGONIST THERAPEUTICS 0.60%
BIONTECH SE ADR 0.58%
Check overlap with more funds →

Side by side

DFUS Dimensional U.S. Equity Market ETF IBB iShares Biotechnology ETF
Where it sits Stock ETF Thematic ETF
Issuer Dimensional iShares
What it is Actively managed Biotech
Total return, 1 year +13.8% +37.5%
Its benchmark over the same days +13.3% (IWV) not measured
Gap to its benchmark +0.5 pts vs IWV not measured
Expense ratio 0.09% 0.44%
Already in the S&P 500 89.4% 40.2%
Holdings 2236 245
Net assets, DFUS as of Jul 31, 2026 and IBB as of Oct 27, 2026 $20.9bn $11.0bn

DFUS and IBB on the fields both publish, as of Oct 28, 2026. Source: ETFIQ.

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About each fund
DFUS

Over the year to Oct 28, 2026 it returned +13.8% with distributions reinvested, against +13.3% for its benchmark, the Russell 3000 Index.

DFUS is actively managed and tracks no index. The prospectus expense ratio is 0.09% a year. By its holdings filed for Jul 31, 2026, 89% of the fund by weight is stocks the S&P 500 also holds, across 2,236 positions, with the top ten at 34.6%.

IBB

By weight, 40% of IBB's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 99%. The top ten holdings are 50% of the fund across 245 positions, as published by its issuer for Oct 27, 2026. Over the year to Oct 28, 2026 the fund returned +37.5% with distributions reinvested.

Questions people ask

Are DFUS and IBB in the same category?
DFUS is a stock ETF and IBB is a thematic ETF, so they do different jobs. The table compares what both publish: return, cost and holdings.
Which returned more over the last year, DFUS or IBB?
In the year to Oct 28, 2026, with distributions reinvested, DFUS returned +13.8% and IBB +37.5%.
Which is cheaper, DFUS or IBB?
DFUS is cheaper, by 0.35 percentage points a year. That is about $35 on $10,000 held for a year. Fees come from each fund's prospectus.
How much do DFUS and IBB overlap with the S&P 500?
By their latest filed holdings, 89% of DFUS and 40% of IBB by weight is stocks the S&P 500 already holds.
Other comparisons
DFUS vs XBIAIRR vs DFUSDFUS vs GDXDFUS vs LYTECGGR vs IBBIBB vs XLGIBB vs QUALIBB vs IWB
Where to next
DFUS on its own →IBB on its own →Hold both: look the portfolio through →Rankings →DFUS dividend history →DFUS holdings →IBB dividend history →IBB holdings →Standards and sources →
Sources and dates
DFUS filings on SEC EDGAR ↗
DFUS prospectus with the expense ratio (SEC) ↗
Dimensional website ↗
IBB filings on SEC EDGAR ↗
IBB prospectus with the expense ratio (SEC) ↗
iShares page for IBB ↗

Links are sources, not endorsements. 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.

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ETFIQ, DFUS against IBB, data as of Oct 28, 2026. https://etfiq.com/compare/any/dfus-vs-ibb

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