Data as of .
BBC vs GNOM: which is really different?
BBC and GNOM hold 6% of their weight in the same names, and BBC returned more over the year.
ETFIQ Off-Index Score: BBC scores higher
How much of it is not the index it is sold as an alternative to?
A percentile among the 379 thematic ETFs with a holdings filing. It is a position in a set, not a rating, and neither end of it is a recommendation. All thematic ETFs ranked by it · How it is computed
6% of the two portfolios are the same securities at the same weight.
What they hold in common
By the books each fund has filed, BBC and GNOM hold 6% of their money in the same securities at the same weight.
| Holding | BBC | GNOM |
|---|---|---|
| INTELLIA THERAPEUTICS INC | 1.11% | 1.03% |
| VIR BIOTECHNOLOGY INC | 1.13% | 0.92% |
| PRAXIS PRECISION MEDICINES INC | 0.88% | 2.56% |
| BEAM THERAPEUTICS INC | 0.82% | 1.75% |
| UNIQURE NV | 0.76% | 1.84% |
| STOKE THERAPEUTICS INC | 0.75% | 1.00% |
| WAVE LIFE SCIENCES LTD | 0.32% | 0.51% |
| REGENXBIO INC | 0.48% | 0.28% |
| ROCKET PHARMACEUTICALS INC | 0.76% | 0.26% |
| PRIME MEDICINE INC | 0.64% | 0.22% |
| Only in BBC | Only in GNOM |
|---|---|
| ERASCA INC 2.19% | MODERNA INC 7.99% |
| ENLIVEN THERAPEUTICS INC 1.81% | TWIST BIOSCIENCE CORP 7.40% |
| TANGO THERAPEUTICS INC 1.71% | 10X GENOMICS INC-CLASS A 6.53% |
| ORUKA THERAPEUTICS INC 1.68% | GUARDANT HEALTH INC 5.78% |
| SPYRE THERAPEUTICS INC 1.64% | ILLUMINA INC 5.30% |
| ALUMIS INC 1.59% | NATERA INC 5.13% |
| DIANTHUS THERAPEUTICS INC 1.54% | GENSCRIPT BIOTECH CORP 4.29% |
| KODIAK SCIENCES INC 1.35% | BIO-TECHNE CORP 3.56% |
Weight overlap is an ETFIQ calculation: for every security both funds hold, the smaller of the two weights, summed. Above 50%, holding both is close to holding one of them twice. Holdings dated Apr 30, 2026 and Sep 18, 2026.
Performance, window by window
| Window | Total return | vs the S&P 500 | vs the Nasdaq-100 | |||
|---|---|---|---|---|---|---|
| BBC | GNOM | BBC | GNOM | BBC | GNOM | |
| 3 months | +6.9% | +27.6% | +4.7 pts | +25.4 pts | +9.4 pts | +30.1 pts |
| 6 months | +22.7% | +56.4% | +4.7 pts | +38.4 pts | −1.5 pts | +32.2 pts |
| 1 year | +95.6% | +77.5% | +79.0 pts | +60.9 pts | +73.8 pts | +55.7 pts |
| 3 years | +143.8% | +59.3% | +65.3 pts | −19.1 pts | +45.6 pts | −38.9 pts |
| Since launch | +92.6% | +9.8% | −268.5 pts | −185.2 pts | −583.0 pts | −297.4 pts |
| BBC Virtus Biotech Clinical Trials ETF Holds 124 stocks in biotech, 0% of its weight in S&P 500 companies | GNOM Global X Genomics & Biotechnology ETF Holds 52 stocks in genomics and gene editing, 21% of its weight in S&P 500 companies | |
|---|---|---|
| Issuer | Virtus | Global X |
| Theme | Biotech | Genomics and gene editing |
| In the S&P 500 | 0.0% | 20.9% |
| Active share vs the S&P 500 | 100.0% | 97.6% |
| In the Nasdaq-100 | 0.0% | 5.0% |
| Holdings | 124 | 52 |
| Top ten, share of the fund | 16.2% | 52.7% |
| Expense ratio | 0.65% | 0.50% |
| Fee for the differing part | 0.65% | 0.51% |
| Total return, 1 year | +95.6% | +77.5% |
| vs the S&P 500 | +79.0 pts | +60.9 pts |
| vs the Nasdaq-100 | +73.8 pts | +55.7 pts |
| Below its high | −19.1% | −39.6% |
| Net assets | $37m | $100m |
BBC in plain words
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 16% of the fund across 124 positions, as filed for Apr 30, 2026. Over the year to Sep 18, 2026 the fund returned +95.6% with distributions reinvested against +16.6% for the S&P 500, so a holder was ahead by 79.0 pts. It sits 19.1% below its all-time high of Feb 8, 2021.
GNOM in plain words
By weight, 21% of GNOM's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 98%. The top ten holdings are 53% of the fund across 52 positions, as published by its issuer for Sep 18, 2026. Over the year to Sep 18, 2026 the fund returned +77.5% with distributions reinvested against +16.6% for the S&P 500, so a holder was ahead by 60.9 pts. It sits 39.6% below its all-time high of Feb 8, 2021.
Questions people ask
- Do BBC and GNOM hold the same stocks?
- By their latest filings, 6% of their books are the same securities at the same weight, which is mostly different names. Overlap is the sum of the smaller weight of every security they share.
- Which is more different from the S&P 500, BBC or GNOM?
- BBC has 0% of its weight in S&P 500 names and GNOM has 21%, so BBC differs more from the index.
- Which is cheaper, BBC or GNOM?
- BBC charges 0.65% a year and GNOM charges 0.50%, so GNOM is cheaper. Fees come from each fund's prospectus.
Other comparisons
Where these figures came from
ETFIQ links to the documents behind every figure. It is not affiliated with any issuer, and a link is not an endorsement.
Cite this page. ETFIQ, BBC against GNOM, data as of Sep 18, 2026. https://etfiq.com/compare/themes/bbc-vs-gnom Free to use with attribution; the underlying files are at Open data.