BBC vs IWM: holdings overlap, shared companies and scores
As of October 9, 2026, BBC and IWM overlap 5.6% by weight. Virtus Biotech Clinical Trials ETF (BBC): Pre-approval biotech companies iShares Russell 2000 ETF (IWM): Russell 2000 index.
Updated October 9, 2026
Where IWM trades against its own history
IWM trades at 16.7 times earnings, against its own median of 17.1, and is cheaper than 60% of its own last 9 years.
What moved BBC and IWM this week
BBC fell 0.9% in the week to October 9, 2026. The holdings that moved it most were Arrivent Biopharma (−40.8%), Abcellera Biologics (−8.7%) and MBX Biosciences (−9.0%); Prime Medicine (+33.9%) pushed the other way.
IWM fell 0.9% in the week to October 9, 2026. The holdings that moved it most were Twist Bioscience (−15.3%), 10X Genomics (−13.7%) and AXT (−20.3%); Vaxcyte (+26.4%) pushed the other way.
What do BBC and IWM each hold?
14% of BBC is its ten largest holdings.
What's inside IWM: Tech 15%, Semiconductors 3%.
3% of IWM is its ten largest holdings.
How much do BBC and IWM overlap? 5.6% by weight
As of October 9, 2026, BBC and IWM overlap 5.6% by weight.
87% of BBC is already inside IWM.
6% of IWM is already inside BBC.
BBC holds 129 companies and IWM holds 1,975; 112 are in both.
Computed by ETF Copilot from both funds' holdings rather than quoted from a data provider, and rebuilt nightly.
How does ETF Copilot score BBC and IWM? 1.5 and 3.5 out of 10
As of October 9, 2026, ETF Copilot scores BBC 1.5 out of 10 and IWM 3.5 out of 10.
They differ most on Risk: BBC 0.2 and IWM 2.6.
The five factor scores behind them are set out below, 0–10 and higher is better, ranked against every US equity ETF we track.
| Factor | BBC | IWM |
|---|---|---|
| Risk | 0.2 | 2.6 |
| Quality | 0.2 | 0.5 |
| Return | 4.0 | 4.0 |
IWM is the cheaper of the two at 0.19% a year
As of October 9, 2026, BBC charges 0.65% a year, yields 1.50% and holds $41M in assets across 129 positions.
As of October 9, 2026, IWM charges 0.19% a year, yields 0.97% and holds $78.2B in assets across 1975 positions.
| Measure | BBC | IWM |
|---|---|---|
| Expense ratio | 0.65% | 0.19% |
| Dividend yield | 1.50% | 0.97% |
| Assets under management | $41M | $78.2B |
| Holdings | 129 | 1975 |
Expense ratio, dividend yield and assets under management are reported by the fund and refreshed daily. Every other figure on this page is computed by ETF Copilot.
Compare with similar funds
Cite this
ETF Copilot, “BBC vs IWM holdings overlap and scores”, as of October 9, 2026.
https://etf-copilot.com/compare/bbc-vs-iwm
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