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iShares Biotechnology ETF (IBB)
Look-through valuation · Theme · Expense ratio 0.45 % · ISIN US4642875565
Price history (since 2001)
Monthly close since 2001. Price shows performance, the valuation verdict is in the look-through above.
Top holdings
| Holding | Weight | vs fair value | Quality |
|---|---|---|---|
| Amgen Inc AMGN | 8.5 % | −39.4 % | 63 |
| Vertex Pharmaceuticals Inc VRTX | 8.2 % | −47.0 % | 79 |
| Gilead Sciences Inc GILD | 7.0 % | +7.8 % | 83 |
| Regeneron Pharmaceuticals Inc REGN | 6.0 % | −25.5 % | 72 |
| argenx NV ADR ARGX | 3.3 % | −61.2 % | 70 |
| Natera Inc NTRA | 3.2 % | −95.0 % | 37 |
| Revolution Medicines Inc RVMD | 2.9 % | n/a | n/a |
| Biogen Inc BIIB | 2.2 % | −9.3 % | 65 |
| Alnylam Pharmaceuticals Inc ALNY | 2.2 % | −76.9 % | 66 |
| Illumina Inc ILMN | 2.2 % | −50.5 % | 83 |
| BeiGene, Ltd. ONC | 2.1 % | −69.0 % | 70 |
| Insmed Inc INSM | 2.1 % | n/a | n/a |
| Incyte Corporation INCY | 1.8 % | −4.1 % | 91 |
| Moderna Inc MRNA | 1.6 % | −79.9 % | 45 |
| United Therapeutics Corporation UTHR | 1.6 % | +10.5 % | 72 |
| Roivant Sciences Ltd ROIV | 1.4 % | n/a | n/a |
| Genmab AS GMAB | 1.2 % | n/a | n/a |
| Neurocrine Biosciences Inc NBIX | 1.2 % | −40.3 % | 71 |
| Ascendis Pharma AS ASND | 1.2 % | −97.6 % | 61 |
| BridgeBio Pharma Inc BBIO | 1.1 % | n/a | n/a |
| Medpace Holdings Inc MEDP | 1.0 % | −52.4 % | 86 |
| Charles River Laboratories CRL | 1.0 % | −57.8 % | 59 |
| Biomarin Pharmaceutical Inc BMRN | 1.0 % | −43.5 % | 67 |
| Exelixis Inc EXEL | 0.9 % | +2.1 % | 95 |
| Halozyme Therapeutics Inc HALO | 0.9 % | −42.3 % | 79 |
Fair value and quality per position come from the same valuation as our stock pages. Showing the 25 largest of 239 disclosed positions. "n/a" means the position is not (yet) in our stock universe and does not enter the average.
The 10 most cheaply valued ETFs
Measured against the look-through fair value of the holdings (sufficiently covered funds only). Green means below fair value, red above. Not financial advice.
- 1 CHIU Global X MSCI China Utilities ETF +71.9 % below FV
- 2 FXI iShares China Large-Cap ETF +53.7 % below FV
- 3 CHIQ Global X MSCI China Consumer Disc ETF +48.5 % below FV
- 4 FLCH Franklin FTSE China ETF +36.0 % below FV
- 5 KWEB KraneShares CSI China Internet ETF +33.5 % below FV
- 6 FCFY First Trust S&P 500 Diversified Free Cash Flow ETF +32.5 % below FV
- 7 MCHI iShares MSCI China ETF +28.0 % below FV
- 8 ITB iShares U.S. Home Construction ETF +13.7 % below FV
- 9 C003 Amundi Index Solutions - Amundi DivDAX I UCITS ETF EUR Distributing +12.7 % below FV
- 10 TAN Invesco Solar ETF +10.8 % below FV
How we value this ETF
An ETF has no fair value of its own like a single stock. We build it bottom up: every holding has a fair value and a quality score on our pages. Weighted by portfolio share, that gives iShares Biotechnology ETF an average of how cheap or expensive its companies currently sit versus fair value, and how high their average quality is.
As of: Aug 14, 2026
The look-through is a computed summary of public fundamentals and is no substitute for your own research.