iShares Biotechnology ETF Holdings

IBBETF · Nasdaq

$217.01

+$0.66 (+0.31%)

EOD Oct 29, 2026

IBB holds 243 stocks and 5 other positions (cash and equivalents, derivatives). The largest is Gilead Sciences Inc. at 8.40%, and the ten largest make up 50.1% of assets. Holdings as of Oct 28, 2026.

Quality of what it owns

Stock weight by each holding's Quality score

Dividend strength of what it owns

Stock weight by each holding's Dividend score: five years of payments, payout ratio, growth

All 243 stocks

Weight as a share of the fund's assets, Oct 28, 2026

IBB holdings by weight
#	Company	Sector
1	Gilead Sciences Inc.GILD	Healthcare	8.40%	1.94%	48	71
2	Amgen Inc.AMGN	Healthcare	8.11%	2.10%	48	72
3	Vertex Pharmaceuticals IncorporatedVRTX	Healthcare	7.51%	n/a	47	0
4	Regeneron Pharmaceuticals, Inc.REGN	Healthcare	5.51%	0.39%	54	43
5	Moderna, Inc.MRNA	Healthcare	5.34%	n/a	20	0
6	NATERA INC (Common Stock) – ticker 45ENTRA	Healthcare	3.90%	n/a	61	0
7	argenx SE American Depositary ReceiptARGX	Healthcare	3.39%	n/a	67	0
8	Illumina, Inc.ILMN	Industrials	2.97%	n/a	68	0
9	Revolution Medicines Inc.RVMD	Healthcare	2.49%	n/a	10	0
10	Biogen Inc.BIIB	Healthcare	2.45%	n/a	39	0
11	Genmab A/S AmericanGMAB	Healthcare	2.17%	n/a	28	0
12	BeOne Medicines Ltd.ONC	Healthcare	2.15%	n/a	65	0
13	Alnylam Pharmaceuticals IncALNY	Healthcare	2.12%	n/a	81	0
14	United Therapeutics CorporationUTHR	Healthcare	1.66%	n/a	78	0
15	Incyte CorporationINCY	Industrials	1.60%	n/a	43	0
16	Insmed Inc.INSM	Healthcare	1.43%	n/a	40	0
17	Roivant Sciences LtdROIV	Healthcare	1.33%	n/a	16	0
18	Charles River Laboratories International, Inc.CRL	Industrials	1.21%	n/a	27	0
19	Exelixis Inc.EXEL	Healthcare	1.09%	n/a	97	0
20	Medpace Holdings Inc.MEDP	Industrials	1.06%	n/a	87	0
21	Ascendis Pharma A/SASND	Healthcare	1.05%	n/a	59	0
22	Neurocrine Biosciences Inc.NBIX	Healthcare	1.00%	n/a	82	0
23	Halozyme Therapeutics Inc.HALO	Healthcare	1.00%	n/a	66	0
24	BridgeBio Pharma, Inc.BBIO	Healthcare	0.85%	n/a	30	0
25	Bio-Techne CorporationTECH	Healthcare	0.77%	0.44%	52	46

1-25 of 243

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Other positions (5)

Part of the fund's official holdings list, but not companies: cash, money market funds, futures and the like.

IBB positions other than stocks
Position	Type	Weight
Blk Csh Fnd Treasury Sl Agency	Cash and equivalents	0.12%
Cash Collateral Usd Sgaft	Cash and equivalents	0.01%
Russell 2000 Emini Cme Dec 26	Derivative	0.00%
E-Mini Health Care Sector Dec 26	Derivative	0.00%
Usd Cash	Cash and equivalents	-0.02%

Concentration

How much of the fund sits in its largest stocks

IBB holdings questions

How many stocks does IBB hold?+

243 stocks as of Oct 28, 2026, plus 5 cash or money-market lines worth 0.10% of assets.

What is IBB's largest holding?+

Gilead Sciences Inc. (GILD) at 8.40% of the fund. The ten largest positions add up to 50.1%.

Which sectors does IBB invest in most?+

Healthcare (91.0%), Industrials (8.3%), Technology (0.6%).

How often does IBB change its holdings?+

In its last fiscal year the fund's turnover was 27%. Weights move every day with prices, so this list shows the weights on Oct 28, 2026.

More on IBB: Overview · Dividend history

Holdings: the fund's own holdings list, published by BlackRock iShares, as of Oct 28, 2026. Checked against the fund's SEC Form N-PORT for Jun 30, 2026: 232 of these 243 stocks are in that filing too (the rest changed through trading since, such as the index's yearly rebalance). Quality and Dividend scores and yields: computed by Intrinsiqq from each company's SEC filings and today's price.