BBH vs IBB: which is really different?
BBH and IBB hold 64% of their weight in the same names, and BBH returned +38.3% over the year. VanEck Biotech ETF and iShares Biotechnology ETF.
BBH costs 0.09 points a year less; their one-year returns differ by 2.2 points; IBB is far larger, $10.8bn against $472m.
| BBH | IBB | |
|---|---|---|
| Expense ratio | 0.35% | 0.44% |
| Net assets, BBH as of Oct 8, 2026 and IBB as of Oct 9, 2026 | $472m | $10.8bn |
| Total return, 1 year | +38.3% | +36.1% |
| What it tracks | Biotech | Biotech |
| Holdings in common | 64% | |
| S&P 500, total return, 1 year | +17.3% | |
| Against the S&P 500, 1 year | ahead by 21.1 pts | ahead by 18.8 pts |
Holdings in common uses holdings dated Oct 8, 2026.
61% of BBH's weight is in S&P 500 companies and 39% is outside the index. Holdings as of Oct 8, 2026.
40% of IBB's weight is in S&P 500 companies and 61% is outside the index. Holdings as of Oct 8, 2026.
A percentile among the 391 thematic ETFs with a holdings filing. All thematic ETFs ranked by it → How it is computed →
What they hold in common
By the books each fund has filed, BBH and IBB hold 64% of their money in the same securities at the same weight. Above 50%, holding both is close to holding one of them twice. Holdings dated Oct 8, 2026.
half
64% in common
64% of the two portfolios are the same securities at the same weight.
Performance, window by window
| Total return | vs the S&P 500 | vs the Nasdaq-100 | ||||
|---|---|---|---|---|---|---|
| Window | BBH | IBB | BBH | IBB | BBH | IBB |
| 3 months | +17.0% | +7.5% | +13.6 pts | +4.1 pts | +13.3 pts | +3.9 pts |
| 6 months | +28.9% | +21.9% | +13.8 pts | +6.8 pts | +5.7 pts | −1.3 pts |
| 1 year | +38.3% | +36.1% | +21.1 pts | +18.8 pts | +14.7 pts | +12.5 pts |
| 3 years | +55.9% | +69.1% | −29.9 pts | −16.7 pts | −51.4 pts | −38.2 pts |
| Since launch BBH Dec 2011 · IBB Feb 2001 | +617.4% | +525.3% | −94.0 pts | −299.7 pts | −807.3 pts | −936.3 pts |
Source: ETFIQ. Open the live comparison on ETFIQ →
On the same fields
As of Oct 9, 2026. Source: ETFIQ.
BBH in plain words
By weight, 61% 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 73% of the fund across 25 positions, as published by its issuer for Oct 8, 2026. Over the year to Oct 9, 2026 the fund returned +38.3% with distributions reinvested against +17.3% for the S&P 500, so a holder was ahead by 21.1 pts.
IBB in plain words
By weight, 40% of IBB'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 50% of the fund across 245 positions, as published by its issuer for Oct 8, 2026. Over the year to Oct 9, 2026 the fund returned +36.1% with distributions reinvested against +17.3% for the S&P 500, so a holder was ahead by 18.8 pts.
Questions people ask
- Do BBH and IBB hold the same stocks?
- By their latest filings, 64% of their books are the same securities at the same weight, which is close to holding one of them twice. Overlap is the sum of the smaller weight of every security they share.
ETFIQ links to the documents behind every figure; a link is not an endorsement. A comparison is not a recommendation.
How this is computed
It is a position in a set, not a rating, and neither end of it is a recommendation.
Weight overlap is an ETFIQ calculation: for every security both funds hold, the smaller of the two weights, summed.
Every figure is an ETFIQ calculation with distributions reinvested.
ETFIQ, BBH against IBB, data as of Oct 9, 2026. https://etfiq.com/compare/themes/bbh-vs-ibb
ETFIQ. (Oct 9, 2026). BBH against IBB. Retrieved from https://etfiq.com/compare/themes/bbh-vs-ibb
[BBH against IBB (ETFIQ, Oct 9, 2026)](https://etfiq.com/compare/themes/bbh-vs-ibb)
Free to use with attribution for figures ETFIQ computes; issuer data stays under its owner's terms.