IBBvsGNMXETF Comparison
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iShares Biotechnology ETF (IBB) belongs to the US Health Care segment. Corgi Genomics & Precision Medicine ETF (GNMX) is part of the BioTech & Genomics segment. IBB's top 3 sector exposures are Healthcare, Non-Corporate and Non-Energy Materials. In contrast, GNMX's top sector exposures are Healthcare. IBB is more expensive with a Total Expense Ratio (TER) of 0.44%, versus 0.35% for GNMX. Run a side-by-side ETF comparison of IBB and GNMX below, and assess how they stack up in performance, liquidity, risk, exposure, holdings, and more, helping you select the best ETF for your investments.
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IBB vs GNMX performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 09/10/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | IBB GNMX | +1.32%+4.88% | +22.15%+30.11% | +20.17%n/a | +44.46%n/a | +60.12%n/a | +18.70%n/a |
| Flows | IBB GNMX | +$288M+$1M | +$826M+$761K | +$332M- | +$1.80B- | -$589M- | -$1.26B- |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | IBB GNMX | +24.50%+33.25% | +21.85%n/a | +21.07%n/a | +22.48%n/a |
| Max drawdown | IBB GNMX | -6.57%-8.53% | -9.61%n/a | -24.82%n/a | -38.96%n/a |
| Max drawdown duration | IBB GNMX | 22d32d | 151dn/a | 377dn/a | 1523dn/a |
Trading data
IBB | GNMX | |
Last sale 9/10/2026 at 1:30 PM | $202.64 | |
| Previous close 09/10/2026 | $205.49 | |
| Consolidated volume 09/10/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
Replication quality
Data as of August 31, 2026
1-year trailing difference
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GNMX
is actively managed and doesn’t replicate an indexIBB | GNMX | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 9/10/2026 at 1:30 PM
Live
Closed
IBB | GNMX | |
|---|---|---|
| Last price | $202.64 | – |
| 1D performance | -1.39% | – |
| AuM | $10.30 B | $2.54 M |
| E/R | 0.44% | 0.35% |
Characteristics
IBB | GNMX | |
|---|---|---|
| Management strategy | Passive | Active |
| Provider | iShares | Corgi Funds |
| Benchmark | ICE Biotechnology Index | - |
| N° of holdings | 240 | 57 |
| Asset class | Equities | - |
| Trailing 12m distribution yield | Join | Join |
| Inception date | February 5, 2001 | May 6, 2026 |
| ESG | No | No |
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Exposure
Countries
IBB
USA
86.04%
Other
13.96%
GNMX
USA
87.58%
Other
12.42%
Sectors
IBB
Healthcare
99.83%
Other
0.17%
GNMX
Healthcare
96.78%
Other
3.22%
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Diversification
IBB
Total weight of top 15 holdings out of 15
54.48%
GNMX
Total weight of top 15 holdings out of 15
55.56%
Top 15 holdings
Data as of July 31, 2026
IBB
Amgen, Inc.
8.42%
Vertex Pharmaceuticals, Inc.
7.87%
Gilead Sciences, Inc.
7.14%
Regeneron Pharmaceuticals, Inc.
5.84%
argenx SE
3.55%
Natera, Inc.
2.88%
Revolution Medicines, Inc.
2.87%
Illumina, Inc.
2.42%
Biogen, Inc.
2.38%
Alnylam Pharmaceuticals, Inc.
2.14%
BeOne Medicines Ltd.
2.01%
Incyte Corp.
1.91%
Insmed, Inc.
1.71%
United Therapeutics Corp.
1.69%
Moderna, Inc.
1.65%
GNMX
Thermo Fisher Scientific, Inc.
9.28%
Vertex Pharmaceuticals, Inc.
6.75%
Illumina, Inc.
4.56%
Guardant Health, Inc.
4.26%
Revolution Medicines, Inc.
3.92%
Incyte Corp.
3.38%
Moderna, Inc.
3.06%
Genmab A/S
2.96%
Alnylam Pharmaceuticals, Inc.
2.77%
Bio-Techne Corp.
2.67%
10X Genomics, Inc.
2.58%
BioMarin Pharmaceutical, Inc.
2.55%
Arrowhead Pharmaceuticals, Inc.
2.34%
Krystal Biotech, Inc.
2.30%
QIAGEN NV
2.18%
Frequently asked questions about IBB and GNMX
Which ETF is bigger: IBB or GNMX?
As of September 10, 2026, IBB holds $10.30 B in assets under management (AUM), while GNMX manages $2.54 M.
What sectors do the IBB and GNMX ETFs invest in?
IBB leans toward sectors like Healthcare. Meanwhile, GNMX focuses on Healthcare.
What are the top holdings of the IBB ETF and GNMX ETF?
IBB top holdings include Amgen, Inc., Vertex Pharmaceuticals, Inc. and Gilead Sciences, Inc.. GNMX holds in its top three: Thermo Fisher Scientific, Inc., Vertex Pharmaceuticals, Inc. and Illumina, Inc..
Which ETF is more diversified: IBB or GNMX?
IBB holds 241 securities with 54.48% of its assets in the top 15. GNMX has 57 securities and a top 15 weight of 55.56%.
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