IBB ETF

$203.25

AUM$10.6B

TER0.44%

Holdings249

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IBB ETF

$203.25

iShares Biotechnology ETF

AUM$10.6B

TER0.44%

Holdings249

See how much of IBB you already own

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Overview Performance Chart Dividends Top Holdings All Holdings Sectors Geography Similar Compare Overlap

IBB holds 49.3% of its assets in its 10 largest positions as of Oct 1, 2026. IBB is iShares Biotechnology ETF.

Showing the top 10 of 249 holdings · as of Oct 1, 2026

Top 10 weight

49.33%

IBB top 10 holdings, by weight
#	Ticker	Name	Weight	Cumulative	Shares	Mkt value	Sector	Industry
1	GILD	Gilead Sciences Inc	8.18%	8.2%	5,867,220	$865.41M	-	-
2	AMGN	Amgen IncHealth Care · Pharmaceuticals	7.68%	15.9%	1,996,094	$812.95M	Health Care	Pharmaceuticals
Sector and industry · Pro
3	VRTX	Vertex Pharmaceuticals Inc -	7.55%	23.4%	1,576,153	$798.70M
4	—	Regeneron Parmaceuticals Inc.	5.23%	28.6%	752,657	$553.06M
5	MRNA	Moderna	4.95%	33.6%	2,774,432	$524.20M
6	NTRA	Natera Inc	3.95%	37.5%	1,022,469	$417.65M
7	—	Argenx Se Sponsored Adr (1 Ads : 1 Ordinary)	3.73%	41.3%	422,091	$395.08M
8	ILMN	Illumina Inc	2.87%	44.1%	1,143,757	$303.92M
9	RVMD	Revolution Medicines Inc	2.85%	47.0%	1,464,143	$301.45M
10	BIIB	Biogen Inc.	2.34%	49.3%	1,113,770	$248.17M
More holdings · Pro

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Themes in the top 10

BiotechnologyPharmaceuticalsOncologyLife Sciences ToolsBiotechnology ToolsImmunologyAging PopulationDigital Health

IBB ETF Top Holdings

IBB holdings top 10 positions. The top 10 holdings account for 49.3% of the fund, led by Gilead Sciences Inc at 8.2%, Amgen Inc at 7.7%, Vertex Pharmaceuticals Inc - Common at 7.5%.

IBB portfolio concentration is moderate, with the top 10 representing 49.3% of total assets. The largest sector exposure is Health Care at 88.1%.

IBB sectors provide a detailed breakdown. IBB overlap shows how holdings compare to other funds in your portfolio.

Compare IBB

IBB vs SPY IBB vs QQQ IBB vs VOO IBB vs VTI IBB vs IVV IBB vs SCHD IBB vs VYM IBB vs VXUS

#	Ticker	Name	Industry	Weight
1	GILD	Gilead Sciences Inc	Unknown	8.18%
2	AMGN	Amgen Inc	Health Care	7.68%
3	VRTX	Vertex Pharmaceuticals Inc - Common	Health Care	7.55%
4	REGN	Regeneron Parmaceuticals Inc.	Health Care	5.23%
5	MRNA	Moderna	Health Care	4.95%
6	NTRA	Natera Inc	Health Care	3.95%
7	ARGX:AS	Argenx Se Sponsored Adr (1 Ads : 1 Ordinary)	Health Care	3.73%
8	ILMN	Illumina Inc	Health Care	2.87%
9	RVMD	Revolution Medicines Inc	Health Care	2.85%
10	BIIB	Biogen Inc.	Health Care	2.34%

IBB ETF

IBB ETF Top Holdings

Compare IBB

Holdings Distribution