Total Holdings
259
Portfolio diversification across 259 positions
IBB
(NASDAQ)iShares Biotechnology ETF
$169.43-- (--)
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IBB ETF Holdings: iShares Biotechnology ETF
Complete portfolio holdings with allocation weights, sector breakdown, and geographic exposure for this Equity ETF. Analyze fund diversification and concentration.
Assets Under Management
$8.34B
Total fund assets
Expense Ratio
0.44%
Annual management fee
Fund Issuer
BlackRock
NASDAQ
Portfolio Allocations
Distribution breakdown by sector, asset type, and geographic region. Understand the fund's diversification strategy across markets and asset classes.
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Top 50 Holdings by Portfolio Weight
View ticker symbols, company names, asset types, and allocation percentages for each position
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| # | Symbol | Name | Type | Weight |
|---|---|---|---|---|
| 1 |  | Gilead Sciences, Inc | Stock | 9.16% |
| 2 |  | Vertex Pharmaceuticals Incorporated | Stock | 8.88% |
| 3 |  | Amgen Inc | Stock | 8.81% |
| 4 |  | Regeneron Pharmaceuticals, Inc. | Stock | 7.21% |
| 5 |  | Alnylam Pharmaceuticals, Inc. | Stock | 3.99% |
| 6 |  | Insmed Incorporated | Stock | 3.20% |
| 7 |  | argenx SE | Stock | 3.07% |
| 8 |  | Biogen Inc. | Stock | 2.46% |
| 9 |  | Natera, Inc | Stock | 2.43% |
| 10 |  | United Therapeutics Corporation | Stock | 2.30% |
| 11 |  | BeOne Medicines AG | Stock | 1.93% |
| 12 |  | Incyte Corporation | Stock | 1.70% |
| 13 |  | Illumina, Inc. | Stock | 1.68% |
| 14 |  | Moderna, Inc. | Stock | 1.68% |
| 15 |  | Revolution Medicines, Inc. | Stock | 1.54% |
| 16 |  | Roivant Sciences Ltd. | Stock | 1.24% |
| 17 | C CO:GMAB | Genmab A/S | Stock | 1.23% |
| 18 |  | Neurocrine Biosciences, Inc. | Stock | 1.18% |
| 19 |  | Genmab A/S | Stock | 1.17% |
| 20 |  | BridgeBio Pharma, Inc. | Stock | 1.13% |
| 21 |  | Ionis Pharmaceuticals, Inc. | Stock | 1.11% |
| 22 |  | Medpace Holdings, Inc. | Stock | 1.00% |
| 23 |  | Madrigal Pharmaceuticals, Inc. | Stock | 1.00% |
| 24 |  | BioMarin Pharmaceutical Inc | Stock | 0.99% |
| 25 |  | Exelixis, Inc. | Stock | 0.99% |
| 26 |  | Ascendis Pharma A/S | Stock | 0.96% |
| 27 |  | Avidity Biosciences Inc | Stock | 0.85% |
| 28 |  | Bio-Techne Corporation | Stock | 0.76% |
| 29 |  | Charles River Laboratories International, Inc | Stock | 0.73% |
| 30 |  | Halozyme Therapeutics, Inc | Stock | 0.69% |
| 31 |  | Praxis Precision Medicines, Inc | Stock | 0.69% |
| 32 |  | Arrowhead Pharmaceuticals, Inc | Stock | 0.68% |
| 33 |  | Vaxcyte, Inc | Stock | 0.65% |
| 34 |  | Cytokinetics, Incorporated | Stock | 0.64% |
| 35 |  | Repligen Corporation | Stock | 0.61% |
| 36 |  | Krystal Biotech, Inc | Stock | 0.59% |
| 37 |  | Axsome Therapeutics, Inc | Stock | 0.58% |
| 38 |  | Rhythm Pharmaceuticals, Inc | Stock | 0.52% |
| 39 |  | Kymera Therapeutics, Inc | Stock | 0.48% |
| 40 |  | CRISPR Therapeutics AG | Stock | 0.48% |
| 41 |  | Tempus AI, Inc. Class A Common Stock | Stock | 0.48% |
| 42 |  | PTC Therapeutics, Inc | Stock | 0.45% |
| 43 |  | Protagonist Therapeutics Inc | Stock | 0.45% |
| 44 |  | Nuvalent Inc | Stock | 0.43% |
| 45 |  | Alkermes plc | Stock | 0.43% |
| 46 |  | Arcellx Inc | Stock | 0.42% |
| 47 |  | Cogent Biosciences Inc | Stock | 0.41% |
| 48 |  | Amicus Therapeutics, Inc | Stock | 0.37% |
| 49 |  | Bruker Corporation | Stock | 0.36% |
| 50 |  | ACADIA Pharmaceuticals Inc | Stock | 0.35% |
Frequently Asked Questions About iShares Biotechnology ETF Holdings
What are the top holdings in IBB?
iShares Biotechnology ETF (IBB) holds 259 securities. View the complete list of top holdings sorted by portfolio weight, showing each security's ticker symbol, company name, asset type, and allocation percentage.
How concentrated is IBB's portfolio?
Portfolio concentration is measured by the weight of top holdings. A concentrated portfolio has fewer large positions with higher individual weights, while a diversified portfolio distributes holdings more evenly. Review IBB's holdings table to analyze concentration risk.
What is IBB's sector allocation?
The Sector Allocation chart shows how IBB distributes investments across different industries like Technology, Healthcare, Financials, and more. This sector exposure helps understand the fund's industry diversification strategy.
What countries does IBB invest in?
IBB's geographic exposure is shown in the Countries tab under Portfolio Allocations. This reveals the fund's international diversification and exposure to different regions and global markets.
How diversified is IBB ETF?
IBB's diversification can be assessed by reviewing its 259 holdings, sector allocation, and geographic exposure. A well-diversified ETF spreads investments across multiple securities, sectors, and regions to reduce concentration risk.