iShares Biotechnology ETF

iShares Biotechnology ETF

About

iShares Biotechnology ETF (US4642875565) is a US-listed equity ETF tracking the NYSE Biotechnology Index. With a expense ratio of 0.44%, its costs are on the higher end for an ETF, paying distributions. The fund holds 254 positions across 5 regions with 8.1B in assets, with heavy concentration — 89% in United States, 95% in Health Care.

Score Breakdown

Scores are scaled 1–10 on a logarithmic curve relative to all ETFs in the database. Last updated: Jun 22, 2026
Component Score Details
Cost (30%) 7.7 Tracking Difference: 10.0 · TD Consistency: — · Expense Ratio: 2.5
Liquidity (25%) 10.0 Assets Under Management

Data sources: provider factsheets, exchange data, and NAV history. Information for educational purposes only — not investment advice.

Ticker IBB
ISIN
Fund Size $8.1B
Issuer iShares
Distribution Pays Distributions
Replication Physical
Inception Feb 2001
Base Currency USD
Index NYSE Biotechnology Index
Asset Class Equities
Category Thematic Equity

Costs

7.7
This fund has low total costs, with competitive tracking and expense ratios.

Cost Metrics Explained

What expense ratio, tracking difference, and TD consistency measure

Expense ratio (Total Expense Ratio) is the annual fee the fund charges, deducted from assets. It’s the headline cost, but not the full picture.

Tracking Difference measures how much the fund actually lags (or leads) its benchmark index per year. This is the single best measure of true cost — it captures the expense ratio plus all other drags like sampling error and tax withholding. A lower (or negative) value is better.

TD Consistency measures how stable the tracking difference is from year to year. A low value means predictable, reliable costs; a high value means costs can vary significantly.

Expense Ratio0.00%
 
Metric Value
Expense Ratio 0.44%

Cumulative Returns

Performance across different time periods.
Year to Date+0.00%
1 Year+0.00%
3 Years+0.00%
5 Years+0.00%
Inception+0.00%
 
Period Cumulative Return
1 Month
3 Months
6 Months
1 Year +41.86%
3 Years +11.21%
5 Years +2.85%
10 Years +6.60%
YTD +2.17%
Since Inception +6.90%

Holdings

This fund invests into 254 individual investments.
#1
Vertex Pharmaceuticals Inc
8.01%
#2
Amgen Inc
7.95%
#3
Gilead Sciences Inc
7.30%
#4
Regeneron Pharmaceuticals Inc
5.23%
#5
ARGENX SE - ADR
3.87%
#6
Alnylam Pharmaceuticals Inc
3.14%
#7
Natera Inc
2.68%
#8
REVOLUTION Medicines Inc
2.64%
#9
Biogen Inc
2.44%
#10
Illumina Inc
2.08%
View all holdings (50)
# Holding Ticker Weight
1 Vertex Pharmaceuticals Inc VRTX 800.54%
2 Amgen Inc AMGN 795.26%
3 Gilead Sciences Inc GILD 730.32%
4 Regeneron Pharmaceuticals Inc REGN 522.79%
5 ARGENX SE - ADR ARGX 387.47%
6 Alnylam Pharmaceuticals Inc ALNY 314.08%
7 Natera Inc NTRA 268.45%
8 REVOLUTION Medicines Inc RVMD 263.64%
9 Biogen Inc BIIB 244.40%
10 Illumina Inc ILMN 207.57%
11 Moderna Inc MRNA 197.40%
12 United Therapeutics Corp UTHR 187.03%
13 BEONE MEDICINES AG ONC 182.74%
14 Insmed Inc INSM 174.71%
15 Incyte Corp INCY 165.14%
16 Roivant Sciences Ltd ROIV 138.59%
17 Neurocrine Biosciences Inc NBIX 132.83%
18 ASCENDIS PHARMA ASND 121.30%
19 GENMAB SPONSORED ADR GMAB 112.13%
20 Exelixis Inc EXEL 107.39%
21 Ionis Pharmaceuticals Inc IONS 102.04%
22 Bridgebio Pharma Inc BBIO 95.17%
23 Madrigal Pharmaceuticals Inc MDGL 93.21%
24 Arrowhead Pharmaceuticals Inc ARWR 91.97%
25 Axsome Therapeutics Inc AXSM 91.63%
26 Medpace Holdings Inc MEDP 89.94%
27 BioMarin Pharmaceutical Inc BMRN 88.41%
28 Cytokinetics Inc CYTK 79.74%
29 Bio-Techne Corp TECH 76.78%
30 Krystal Biotech Inc KRYS 76.06%
31 Charles River Laboratories International Inc CRL 74.79%
32 Biontech Se BNTX 70.52%
33 Halozyme Therapeutics Inc HALO 68.36%
34 Praxis Precision Medicines Inc PRAX 62.61%
35 Alkermes PLC ALKS 62.29%
36 Vaxcyte Inc PCVX 61.69%
37 Repligen Corp RGEN 59.84%
38 Protagonist Therapeutics Inc PTGX 58.49%
39 Spyre Therapeutics Inc SYRE 58.00%
40 Nuvalent Inc NUVL 54.76%
41 Kymera Therapeutics Inc KYMR 54.64%
42 Rhythm Pharmaceuticals Inc RYTM 54.57%
43 ABIVAX AMERICAN DEPOSITARY SHARES ABVX 54.56%
44 Bruker Corp BRKR 54.04%
45 PTC Therapeutics Inc PTCT 53.76%
46 Tempus AI Inc TEM 45.63%
47 Mirum Pharmaceuticals Inc MIRM 45.12%
48 Twist Bioscience Corp TWST 44.32%
49 Apogee Therapeutics Inc APGE 43.73%
50 Cogent Biosciences Inc COGT 43.17%

Sectors

Allocation by industry sector.
 
Sector Weight
Health Care 9499.00%
Unknown 501.00%

Regions

Geographic allocation by country of risk.
 
Country Weight
United States 8916.00%
UNKNOWN 501.00%
Netherlands 387.00%
Denmark 121.00%
Germany 71.00%
Iceland 4.00%
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