Do BBC and IDNA hold the same stocks?

By their latest filings, 7% of their books are the same securities at the same weight. Overlap is the sum of the smaller weight of every security they share.

Which is more different from the S&P 500, BBC or IDNA?

BBC has 0% of its weight in S&P 500 names and IDNA has 27%, so BBC differs more from the index.

Which is cheaper, BBC or IDNA?

BBC charges 0.65% a year and IDNA charges 0.47%, so IDNA is cheaper. Fees come from each fund's prospectus.

Data as of Nov 4, 2026.

Thematic ETFs

BBC vs IDNA: Holdings Overlap & Returns

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Over the year to Nov 4, 2026, BBC returned +45.9% to IDNA's +81.1%; 7% of their weight is in the same names.

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Net assets: $46m on Jul 31, 2026 for Virtus Biotech Clinical Trials ETF, and $340m on Nov 3, 2026 for iShares Genomics Immunology and Healthcare ETF.

BBC on its own →IDNA on its own →

At a glance

0.0%

BBC in the S&P 500

27.4%

IDNA in the S&P 500

+45.9%

BBC total return, 1 year

+81.1%

IDNA total return, 1 year

BBC · 1 year to Nov 4, 2026 100% of its weight is outside the S&P 500

0% of BBC's weight is in S&P 500 companies and 100% is outside the index. Holdings as of Jul 31, 2026.

IDNA · 1 year to Nov 4, 2026 73% of its weight is outside the S&P 500

27% of IDNA's weight is in S&P 500 companies and 73% is outside the index. Holdings as of Nov 3, 2026.

Pair scorecard

IDNA costs 0.18 points a year less; their one-year returns differ by 35.2 points.

BBC vs IDNA: Holdings Overlap & Returns
Measure	BBC	IDNA
Return
Measure	BBC	IDNA
Total return, 1 year	+45.9%	+81.1%
Drawdown
Measure	BBC	IDNA
Below its all-time high	27.4%, high on Feb 8, 2021	16.5%, high on Sep 2, 2021
Benchmark
Measure	BBC	IDNA
What it tracks	Biotech	Genomics and gene editing
Cost and size
Measure	BBC	IDNA
Expense ratio	0.65%	0.47%
Net assets, BBC as of Jul 31, 2026 and IDNA as of Nov 3, 2026	$46m	$340m
Holdings
Measure	BBC	IDNA
Holdings in common	7%

Method

What they share

By the books each fund has filed, BBC and IDNA hold 7% of their money in the same securities at the same weight. Holdings dated Jul 31, 2026 and Nov 3, 2026.

50%

0 half 100%

half

7% in common

Positions both hold · largest shared weight first BBC IDNA

IDEAYA BIOSCIENCES INC 0.82% 2.26%

REVOLUTION MEDICINES INC 0.82% 3.60%

ARCUS BIOSCIENCES INC 0.79% 1.37%

JANUX THERAPEUTICS INC 0.75% 0.89%

ABCELLERA BIOLOGICS INC 0.73% 2.48%

VIR BIOTECHNOLOGY INC 0.67% 1.30%

XENCOR INC 1.10% 0.60%

CORVUS PHARMACEUTICALS INC 0.74% 0.54%

INTELLIA THERAPEUTICS INC 0.59% 0.44%

DESIGN THERAPEUTICS INC 0.74% 0.34%

CYTOMX THERAPEUTICS INC 0.69% 0.33%

PRIME MEDICINE INC 0.70% 0.12%

Only in one fund ↓

Only in BBC

FIRST TRACKS BIOTHERAPEUTICS INC 1.67%

MBX BIOSCIENCES INC 1.24%

ATAIBECKLEY INC 1.23%

MONOPAR THERAPEUTICS INC 1.21%

DEFINIUM THERAPEUTICS INC 1.18%

ZENAS BIOPHARMA INC 1.06%

UNIQURE NV 1.06%

APOGEE THERAPEUTICS INC 1.02%

Only in IDNA

MODERNA 13.33%

GENMAB 6.26%

TWIST BIOSCIENCE 5.61%

REGENERON PHARMACEUTICALS 4.24%

BAYER AG 3.85%

EXELIXIS INC 3.80%

TAKEDA PHARMACEUTICAL 3.77%

CARIS LIFE SCIENCES 3.50%

Check overlap with more funds →

Window by window

Window by window: BBC vs IDNA: Holdings Overlap & Returns
	Total return
Window	BBC	IDNA
3 months	−14.8%	+32.4%
6 months	−5.2%	+45.6%
1 year	+45.9%	+81.1%
3 years	+132.0%	+134.8%
Since launchNot the same days: BBC Dec 2014 · IDNA Jun 2019	+72.8%	+88.1%

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Side by side

BBC Virtus Biotech Clinical Trials ETF · Holds 131 stocks in biotech, 0% of its weight in S&P 500 companies IDNA iShares Genomics Immunology and Healthcare ETF · Holds 52 stocks in genomics and gene editing, 27% of its weight in S&P 500 companies

Issuer Virtus iShares

Theme Biotech Genomics and gene editing

In the S&P 500 0.0% 27.4%

Active share vs the S&P 500 100.0% 99.1%

In the Nasdaq-100 0.0% 7.5%

Holdings 131 52

Top ten, share of the fund 11.8% 51.3%

Expense ratio 0.65% 0.47%

Fee for the differing part 0.65% 0.47%

Total return, 1 year +45.9% +81.1%

vs its benchmark not measured not measured

Below its high −27.4% −16.5%

Net assets, BBC as of Jul 31, 2026 and IDNA as of Nov 3, 2026 $46m $340m

As of Nov 4, 2026. Source: ETFIQ.

7% of the two portfolios are the same securities at the same weight.

Alert

About each fund

BBC

By weight, 0% of BBC's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 100%. The top ten holdings are 12% of the fund across 131 positions, as filed for Jul 31, 2026. Over the year to Nov 4, 2026 the fund returned +45.9% with distributions reinvested. It sits 27.4% below its all-time high of Feb 8, 2021.

IDNA

By weight, 27% of IDNA'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 51% of the fund across 52 positions, as published by its issuer for Nov 3, 2026. Over the year to Nov 4, 2026 the fund returned +81.1% with distributions reinvested. It sits 16.5% below its all-time high of Sep 2, 2021.

Questions people ask

Do BBC and IDNA hold the same stocks?: By their latest filings, 7% of their books are the same securities at the same weight. Overlap is the sum of the smaller weight of every security they share.
Which is more different from the S&P 500, BBC or IDNA?: BBC has 0% of its weight in S&P 500 names and IDNA has 27%, so BBC differs more from the index.
Which is cheaper, BBC or IDNA?: BBC charges 0.65% a year and IDNA charges 0.47%, so IDNA is cheaper. Fees come from each fund's prospectus.

Other comparisons

BBC vs GNOM BBC vs GNMX BBC vs ARKG BBC vs IBBQ IDNA vs BBP IDNA vs IBBQ IDNA vs BBH IDNA vs FBT

Where to next

All thematic ETFs ranked by the S&P 500 Difference Score →How the scores are computed →BBC on its own →IDNA on its own →BBC dividend history →BBC holdings →IDNA dividend history →IDNA holdings →Method →Standards and sources →

Sources and dates

BBC filings on SEC EDGAR ↗

BBC prospectus with the expense ratio (SEC) ↗

Virtus website ↗

IDNA filings on SEC EDGAR ↗

IDNA prospectus with the expense ratio (SEC) ↗

iShares page for IDNA ↗

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.

Every number is an ETFIQ calculation with distributions reinvested.

Cite this pageCitation, APA and Markdown

ETFIQ, BBC against IDNA, data as of Nov 4, 2026. https://etfiq.com/compare/themes/bbc-vs-idna

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