Data as of .
BBH vs GNMX: which is really different?
BBH and GNMX hold 29% of their weight in the same names.
ETFIQ Off-Index Score: GNMX 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
29% of the two portfolios are the same securities at the same weight.
What they hold in common
By the books each fund has filed, BBH and GNMX hold 29% of their money in the same securities at the same weight.
| Holding | BBH | GNMX |
|---|---|---|
| Moderna Inc | 6.53% | 7.05% |
| Vertex Pharmaceuticals Inc | 8.14% | 5.89% |
| Illumina Inc | 3.81% | 4.36% |
| Revolution Medicines Inc | 4.77% | 3.27% |
| Alnylam Pharmaceuticals Inc | 2.69% | 2.64% |
| Incyte Corp | 2.41% | 2.90% |
| Bio-Techne Corp | 1.36% | 2.20% |
| Biomarin Pharmaceutical Inc | 1.31% | 2.22% |
| Tempus Ai Inc | 1.17% | 2.02% |
| Qiagen Nv | 1.04% | 1.86% |
| Only in BBH | Only in GNMX |
|---|---|
| Amgen Inc 13.76% | Thermo Fisher Scientific Inc 8.62% |
| Gilead Sciences Inc 13.14% | Guardant Health Inc 3.86% |
| Regeneron Pharmaceuticals Inc 6.76% | 10X Genomics Inc 3.42% |
| Natera Inc 5.71% | Genmab A/S 2.91% |
| Iqvia Holdings Inc 5.17% | Twist Bioscience Corp 2.86% |
| Argenx Se 4.59% | First American Government Obligations Fu 2.62% |
| Biogen Inc 3.16% | Iovance Biotherapeutics Inc 2.30% |
| Beone Medicines Ltd 2.99% | Adaptive Biotechnologies Corp 1.86% |
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 Sep 17, 2026 and Sep 18, 2026.
Performance, window by window
| Window | Total return | vs the S&P 500 | vs the Nasdaq-100 | |||
|---|---|---|---|---|---|---|
| BBH | GNMX | BBH | GNMX | BBH | GNMX | |
| 3 months | +24.8% | +29.7% | +22.5 pts | +27.4 pts | +27.3 pts | +32.2 pts |
| 6 months | +29.0% | not published | +11.0 pts | not published | +4.8 pts | not published |
| 1 year | +40.5% | not published | +23.9 pts | not published | +18.7 pts | not published |
| 3 years | +48.9% | not published | −29.5 pts | not published | −49.3 pts | not published |
| Since launch | +732.7% | +41.2% | −70.8 pts | +36.9 pts | −957.5 pts | +37.4 pts |
| BBH VanEck Biotech ETF Holds 24 stocks in biotech, 60% 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 | VanEck | Corgi |
| Theme | Biotech | Genomics and gene editing |
| In the S&P 500 | 60.4% | 26.7% |
| Active share vs the S&P 500 | 99.0% | 99.4% |
| In the Nasdaq-100 | 47.2% | 8.5% |
| Holdings | 24 | 58 |
| Top ten, share of the fund | 72.4% | 45.1% |
| Expense ratio | 0.35% | 0.35% |
| Fee for the differing part | 0.35% | 0.35% |
| Total return, 1 year | +40.5% | +41.2% (since launch on May 6, 2026) |
| vs the S&P 500 | +23.9 pts | +36.9 pts |
| vs the Nasdaq-100 | +18.7 pts | +37.4 pts |
| Below its high | −4.0% | −1.0% |
| Net assets | $498m | $3m |
BBH in plain words
By weight, 60% of BBH'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 72% of the fund across 24 positions, as published by its issuer for Sep 17, 2026. Over the year to Sep 18, 2026 the fund returned +40.5% with distributions reinvested against +16.6% for the S&P 500, so a holder was ahead by 23.9 pts.
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 BBH and GNMX hold the same stocks?
- By their latest filings, 29% of their books are the same securities at the same weight, which is a meaningful overlap. Overlap is the sum of the smaller weight of every security they share.
- Which is more different from the S&P 500, BBH or GNMX?
- BBH has 60% of its weight in S&P 500 names and GNMX has 27%, so GNMX differs more from the index.
- Which is cheaper, BBH or GNMX?
- BBH charges 0.35% a year and GNMX charges 0.35%, so BBH 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, BBH against GNMX, data as of Sep 18, 2026. https://etfiq.com/compare/themes/bbh-vs-gnmx Free to use with attribution; the underlying files are at Open data.