Data as of .
BBC vs GNMX: which is really different?
BBC and GNMX hold 8% of their weight in the same names.
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
8% 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 GNMX hold 8% of their money in the same securities at the same weight.
| Holding | BBC | GNMX |
|---|---|---|
| REVOLUTION MEDICINES INC | 1.35% | 3.27% |
| RELAY THERAPEUTICS INC | 1.19% | 1.05% |
| BEAM THERAPEUTICS INC | 0.82% | 0.88% |
| UNIQURE NV | 0.76% | 1.65% |
| INTELLIA THERAPEUTICS INC | 1.11% | 0.72% |
| NURIX THERAPEUTICS INC | 0.65% | 1.26% |
| IDEAYA BIOSCIENCES INC | 0.63% | 1.31% |
| 4D MOLECULAR THERAPEUTICS INC | 0.60% | 0.80% |
| RECURSION PHARMACEUTICALS INC | 0.59% | 0.90% |
| ROCKET PHARMACEUTICALS INC | 0.76% | 0.40% |
| PRIME MEDICINE INC | 0.64% | 0.37% |
| Only in BBC | Only in GNMX |
|---|---|
| ERASCA INC 2.19% | Thermo Fisher Scientific Inc 8.62% |
| ENLIVEN THERAPEUTICS INC 1.81% | Moderna Inc 7.05% |
| TANGO THERAPEUTICS INC 1.71% | Vertex Pharmaceuticals Inc 5.89% |
| ORUKA THERAPEUTICS INC 1.68% | Illumina Inc 4.36% |
| SPYRE THERAPEUTICS INC 1.64% | Guardant Health Inc 3.86% |
| ALUMIS INC 1.59% | 10X Genomics Inc 3.42% |
| DIANTHUS THERAPEUTICS INC 1.54% | Genmab A/S 2.91% |
| KODIAK SCIENCES INC 1.35% | Incyte Corp 2.90% |
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 | GNMX | BBC | GNMX | BBC | GNMX | |
| 3 months | +6.9% | +29.7% | +4.7 pts | +27.4 pts | +9.4 pts | +32.2 pts |
| 6 months | +22.7% | not published | +4.7 pts | not published | −1.5 pts | not published |
| 1 year | +95.6% | not published | +79.0 pts | not published | +73.8 pts | not published |
| 3 years | +143.8% | not published | +65.3 pts | not published | +45.6 pts | not published |
| Since launch | +92.6% | +41.2% | −268.5 pts | +36.9 pts | −583.0 pts | +37.4 pts |
| BBC Virtus Biotech Clinical Trials ETF Holds 124 stocks in biotech, 0% of its weight in S&P 500 companies | GNMX Corgi Genomics & Precision Medicine ETF Holds 58 stocks in genomics and gene editing, 27% of its weight in S&P 500 companies | |
|---|---|---|
| Issuer | Virtus | Corgi |
| Theme | Biotech | Genomics and gene editing |
| In the S&P 500 | 0.0% | 26.7% |
| Active share vs the S&P 500 | 100.0% | 99.4% |
| In the Nasdaq-100 | 0.0% | 8.5% |
| Holdings | 124 | 58 |
| Top ten, share of the fund | 16.2% | 45.1% |
| Expense ratio | 0.65% | 0.35% |
| Fee for the differing part | 0.65% | 0.35% |
| Total return, 1 year | +95.6% | +41.2% (since launch on May 6, 2026) |
| vs the S&P 500 | +79.0 pts | +36.9 pts |
| vs the Nasdaq-100 | +73.8 pts | +37.4 pts |
| Below its high | −19.1% | −1.0% |
| Net assets | $37m | $3m |
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.
GNMX in plain words
By weight, 27% of GNMX'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 45% of the fund across 58 positions, as published by its issuer for Sep 18, 2026. Since it launched on May 6, 2026 the fund returned +41.2% with distributions reinvested against +4.3% for the S&P 500, so a holder was ahead by 36.9 pts.
Questions people ask
- Do BBC and GNMX hold the same stocks?
- By their latest filings, 8% 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 GNMX?
- BBC has 0% of its weight in S&P 500 names and GNMX has 27%, so BBC differs more from the index.
- Which is cheaper, BBC or GNMX?
- BBC charges 0.65% a year and GNMX charges 0.35%, so GNMX 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 GNMX, data as of Sep 18, 2026. https://etfiq.com/compare/themes/bbc-vs-gnmx Free to use with attribution; the underlying files are at Open data.