Fund holdings · iShares Biotechnology ETF

IBB holdings: all 245 positions

IBB held 245 positions as of Oct 13, 2026. Gilead Sciences is the largest at 8.44%; the top 10 are 50.6% of the fund.

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How much of the fund each position is · one bar per position, largest first

GILD 8.44%245 positionsBDTX 0.01%

50.6%

top 10 together

8.44%

largest position

223

positions under 1%

Every position

150 of 245 · click a column to sort

IBB’s 245 positions by weight, from the holdings published by its issuer for Oct 13, 2026. A weight is a share of net assets. Source: iShares (BlackRock).
#	Holding	Ticker	Weight ↓
1	Gilead Sciences	GILD	8.44%
2	Amgen Inc	AMGN	8.01%
3	Vertex Pharmaceuticals	VRTX	7.44%
4	Moderna	MRNA	5.83%
5	Regeneron Pharmaceuticals	REGN	5.51%
6	Natera	NTRA	3.93%
7	Argenx SE ADR	ARGX	3.29%
8	Illumina Inc	ILMN	3.02%
9	Revolution Medicines	RVMD	2.68%
10	Biogen	BIIB	2.48%
11	Alnylam Pharmaceuticals	ALNY	2.21%
12	Beone Medicines AG	ONC	2.17%
13	United Therapeutics	UTHR	1.66%
14	Incyte Corp	INCY	1.61%
15	Insmed	INSM	1.54%
16	Genmab Sponsored ADR	GMAB	1.50%
17	Roivant Sciences Ltd	ROIV	1.29%
18	Exelixis Inc	EXEL	1.05%
19	Charles River Laboratories Interna	CRL	1.04%
20	Ascendis Pharma	ASND	1.02%
21	Medpace Holdings	MEDP	1.01%
22	Neurocrine Biosciences	NBIX	1.00%
23	Halozyme Therapeutics	HALO	0.91%
24	BIO Techne	TECH	0.84%
25	Bridgebio Pharma	BBIO	0.82%
26	Biomarin Pharmaceutical	BMRN	0.77%
27	Madrigal Pharmaceuticals	MDGL	0.72%
28	Vaxcyte	PCVX	0.72%
29	Twist Bioscience	TWST	0.71%
30	Repligen	RGEN	0.69%
31	Biontech SE ADR	BNTX	0.63%
32	Protagonist Therapeutics	PTGX	0.63%
33	10X Genomics Class A	TXG	0.61%
34	Krystal Biotech	KRYS	0.61%
35	Cytokinetics	CYTK	0.61%
36	Kymera Therapeutics	KYMR	0.59%
37	Arrowhead Pharmaceuticals	ARWR	0.57%
38	Tempus Ai Class A	TEM	0.54%
39	Ionis Pharmaceuticals	IONS	0.51%
40	Axsome Therapeutics	AXSM	0.51%
41	Alkermes	ALKS	0.48%
42	Praxis Precision Medicines	PRAX	0.47%
43	Spyre Therapeutics Inc	SYRE	0.47%
44	Abivax American Depositary Shares	ABVX	0.46%
45	Bruker	BRKR	0.46%
46	Grail Inc	GRAL	0.44%
47	Rhythm Pharmaceuticals	RYTM	0.42%
48	Iovance Biotherapeutics Inc	IOVA	0.42%
49	Kodiak Sciences	KOD	0.39%
50	PTC Therapeutics	PTCT	0.35%
51	Travere Therapeutics	TVTX	0.35%
52	Oruka Therapeutics Inc	ORKA	0.34%
53	Crispr Therapeutics AG	CRSP	0.33%
54	Definium Therapeutics Inc	DFTX	0.33%
55	Cogent Biosciences	COGT	0.32%
56	Mirum Pharmaceuticals	MIRM	0.31%
57	Scholar Rock Holding	SRRK	0.30%
58	Adaptive Biotechnologies	ADPT	0.29%
59	Immunitybio	IBRX	0.28%
60	Caris Life Sciences	CAI	0.28%
61	CG Oncology	CGON	0.27%
62	Erasca	ERAS	0.27%
63	Veracyte	VCYT	0.25%
64	Acadia Pharmaceuticals	ACAD	0.23%
65	Xenon Pharmaceuticals	XENE	0.23%
66	Abcellera Biologics	ABCL	0.23%
67	Ideaya Biosciences	IDYA	0.23%
68	Tango Therapeutics	TNGX	0.23%
69	Caredx	CDNA	0.23%
70	Relay Therapeutics	RLAY	0.22%
71	Edgewise Therapeutics	EWTX	0.22%
72	Legend Biotech ADR Rep	LEGN	0.22%
73	Tarsus Pharmaceuticals	TARS	0.22%
74	Arcutis Biotherapeutics	ARQT	0.21%
75	Amylyx Pharmaceuticals	AMLX	0.21%
76	Denali Therapeutics	DNLI	0.20%
77	Immunovant	IMVT	0.18%
78	Enliven Therapeutics	ELVN	0.18%
79	Summit Therapeutics	SMMT	0.17%
80	Dyne Therapeutics	DYN	0.17%
81	Beam Therapeutics	BEAM	0.17%
82	Adma Biologics	ADMA	0.16%
83	ZAI Laboratory ADR Representing Lt	ZLAB	0.16%
84	Nurix Therapeutics	NRIX	0.16%
85	Vericel	VCEL	0.15%
86	Novavax	NVAX	0.15%
87	Fortrea Holdings Inc	FTRE	0.15%
88	Aurinia Pharmaceuticals	AUPH	0.14%
89	Arcus Biosciences	RCUS	0.14%
90	Recursion Pharmaceuticals Class A	RXRX	0.14%
91	Biocryst Pharmaceuticals	BCRX	0.13%
92	Agios Pharmaceuticals	AGIO	0.13%
93	Zymeworks	ZYME	0.13%
94	Sarepta Therapeutics	SRPT	0.12%
95	Grifols ADR Representing One Non-V	GRFS	0.12%
96	Xencor	XNCR	0.12%
97	Disc Medicine	IRON	0.12%
98	Intellia Therapeutics	NTLA	0.12%
99	Urogen Pharma	URGN	0.12%
100	Vera Therapeutics Class A	VERA	0.12%
101	Newamsterdam Pharma	NAMS	0.12%
102	Novocure	NVCR	0.11%
103	MBX Biosciences	MBX	0.11%
104	Biohaven	BHVN	0.11%
105	VIR Biotechnology	VIR	0.10%
106	Structure Therapeutics ADR	GPCR	0.10%
107	Uniqure	QURE	0.10%
108	Absci Corp	ABSI	0.10%
109	Ultragenyx Pharmaceutical	RARE	0.10%
110	Mineralys Therapeutics	MLYS	0.09%
111	Compass Pathways ADR PLC	CMPS	0.09%
112	Lakefront Biotherapeutics ADR NV	LKFT	0.09%
113	Immunocore Holdings ADR PLC	IMCR	0.09%
114	Anaptysbio	ANAB	0.09%
115	Precigen	PGEN	0.09%
116	Stoke Therapeutics	STOK	0.09%
117	Nuvation Bio Class A	NUVB	0.09%
118	Trevi Therapeutics	TRVI	0.09%
119	Personalis	PSNL	0.08%
120	Syndax Pharmaceuticals	SNDX	0.08%
121	Septerna	SEPN	0.08%
122	Replimune Group	REPL	0.08%
123	Mesoblast ADR Representing	MESO	0.08%
124	Janux Therapeutics	JANX	0.07%
125	Pharvaris N V	PHVS	0.07%
126	Castle Biosciences	CSTL	0.07%
127	Tyra Biosciences	TYRA	0.07%
128	GH Research PLC	GHRS	0.07%
129	Stevanato Group	STVN	0.07%
130	Inhibrx Biosciences Inc	INBX	0.07%
131	Taysha Gene Therapies	TSHA	0.07%
132	Mannkind	MNKD	0.07%
133	Alvotech SA	ALVO	0.07%
134	Maze Therapeutics	MAZE	0.07%
135	Zenas Biopharma	ZBIO	0.06%
136	Rigel Pharmaceuticals	RIGL	0.06%
137	Kura Oncology	KURA	0.06%
138	Rapport Therapeutics	RAPP	0.06%
139	Alto Neuroscience Inc	ANRO	0.06%
140	Oric Pharmaceuticals	ORIC	0.06%
141	Geron	GERN	0.06%
142	Bicara Therapeutics Inc	BCAX	0.06%
143	Maravai Lifesciences Holdings Inc	MRVI	0.05%
144	Meiragtx Holdings PLC	MGTX	0.05%
145	Cullinan Therapeutics	CGEM	0.05%
146	Arbutus Biopharma Corp	ABUS	0.05%
147	Cytek Biosciences	CTKB	0.05%
148	Alumis	ALMS	0.05%
149	Annexon	ANNX	0.05%
150	4D Molecular Therapeutics Inc	FDMT	0.05%
151	Zevra Therapeutics Inc	ZVRA	0.05%
152	Corvus Pharmaceuticals	CRVS	0.04%
153	Pacific Biosciences of California	PACB	0.04%
154	Monte Rosa Therapeutics	GLUE	0.04%
155	Ironwood Pharma Class A	IRWD	0.04%
156	Ginkgo Bioworks Holdings Class A	DNA	0.04%
157	Omniab Inc	OABI	0.04%
158	Candel Therapeutics Inc	CADL	0.04%
159	Arrivent Biopharma	AVBP	0.04%
160	Wave Life Sciences Inc	WVE	0.04%
161	Solid Biosciences Inc	SLDB	0.04%
162	Olema Pharmaceuticals	OLMA	0.04%
163	Savara	SVRA	0.04%
164	Opko Health	OPK	0.04%
165	Sagimet Biosciences Series A	SGMT	0.03%
166	Altimmune Inc	ALT	0.03%
167	Sana Biotechnology	SANA	0.03%
168	Regenxbio	RGNX	0.03%
169	Cytomx Therapeutics	CTMX	0.03%
170	Aura Biosciences	AURA	0.03%
171	Arvinas	ARVN	0.03%
172	Aclaris Therapeutics	ACRS	0.03%
173	Prothena PLC	PRTA	0.03%
174	Fulgent Genetics	FLGT	0.03%
175	Myriad Genetics	MYGN	0.03%
176	Phathom Pharmaceuticals	PHAT	0.03%
177	Neurogene	NGNE	0.03%
178	Editas Medicine	EDIT	0.03%
179	Design Therapeutics	DSGN	0.02%
180	Emergent Biosolutions	EBS	0.02%
181	Silence Therapeutics ADR Represent	SLN	0.02%
182	Arcturus Therapeutics Holdings Inc	ARCT	0.02%
183	Atea Pharmaceuticals	AVIR	0.02%
184	Enanta Pharmaceuticals Inc	ENTA	0.02%
185	Prime Medicine	PRME	0.02%
186	C4 Therapeutics	CCCC	0.02%
187	Allogene Therapeutics	ALLO	0.02%
188	Autolus Therapeutics ADR PLC	AUTL	0.02%
189	Fulcrum Therapeutics	FULC	0.02%
190	ARS Pharmaceuticals	SPRY	0.02%
191	Contineum Therapeutics Class A	CTNM	0.02%
192	Cabaletta Bio	CABA	0.02%
193	Standard Biotools	LAB	0.02%
194	Rocket Pharmaceuticals	RCKT	0.02%
195	Vanda Pharmaceuticals Inc	VNDA	0.02%
196	Quantum Si Inc Class A	QSI	0.02%
197	Kyverna Therapeutics	KYTX	0.02%
198	Immuneering Class A	IMRX	0.02%
199	Perspective Therapeutics	CATX	0.02%
200	Keros Therapeutics	KROS	0.02%
201	Tectonic Therapeutic	TECX	0.01%
202	Lexeo Therapeutics	LXEO	0.01%
203	Bioage Labs	BIOA	0.01%
204	Lineage Cell Therapeutics Inc	LCTX	0.01%
205	ADC Therapeutics Ltd	ADCT	0.01%
206	Pepgen	PEPG	0.01%
207	AC Immune SA AG	ACIU	0.01%
208	Bridgebio Oncology Therapeutics in	BBOT	0.01%
209	Bicycle Therapeutics ADR PLC	BCYC	0.01%
210	Codexis	CDXS	0.01%
211	Anavex Life Sciences Corp	AVXL	0.01%
212	Upstream Bio	UPB	0.01%
213	Pyxis Oncology Inc	PYXS	0.01%
214	Quanterix	QTRX	0.01%
215	Sionna Therapeutics	SION	0.01%
216	Entrada Therapeutics	TRDA	0.01%
217	Tenaya Therapeutics	TNYA	0.01%
218	Novabridge Biosciences ADR	NBP	0.01%
219	Voyager Therapeutics	VYGR	0.01%
220	Larimar Therapeutics	LRMR	0.01%
221	Lenz Therapeutics	LENZ	0.01%
222	Alpha Teknova	TKNO	0.01%
223	Humacyte Inc	HUMA	0.01%
224	Black Diamond Therapeutics Inc	BDTX	0.01%
225	Jyong Biotech Ltd	MENS	0.00%
226	Foghorn Therapeutics	FHTX	0.00%
227	Lyell Immunopharma	LYEL	0.00%
228	Gossamer Bio	GOSS	0.00%
229	Aardvark Therapeutics	AARD	0.00%
230	Akero Therapeutics Cvr	AKE	0.00%
231	Caribou Biosciences	CRBU	0.00%
232	Cellectis ADR Representing SA	CLLS	0.00%
233	Neumora Therapeutics Inc	NMRA	0.00%
234	Immutep ADS Representing Ltd	IMMP	0.00%
235	Chinook Therapeutics Inc	ADRO	0.00%
236	Arcellx Inc Cvr		0.00%
237	Cartesian Therapeutics Inc		0.00%
238	Fusion Pharmaceuticals Inc Cvr		0.00%
239	Third Harmonic Bio Inc	THRD	0.00%
240	AKOUOS CVRS Prvt		0.00%
241	Cargo Therapeutics Inc	CRGX	0.00%
242	OMNIAB INC $12.50 VESTING Prvt		0.00%
243	OMNIAB INC $15.00 VESTING Prvt		0.00%
244	Russell 2000 Emini Cme Dec 26		0.00%
245	E-Mini Health Care Sector Dec 26		0.00%
	BLK Csh Fnd Treasury Sl Agency		0.13%
	Cash Collateral Usd Sgaft		0.01%
	USD Cash		−0.01%
	Cash and other net assets		0.06%

As of Oct 13, 2026. Source: iShares (BlackRock).

The book

FundiShares Biotechnology ETF

Positions245

Holdings published for (the issuer’s daily file)Oct 13, 2026

SourceiShares (BlackRock) ↗

Top 10 together50.6%

Cash and other net assets0.19%

What this list is

How the list is built

Each weight is the share of net assets the issuer’s own daily file gives, largest first. Cash and other net assets are in their own row and are not a position. A negative weight is a short or an offsetting contract. Where a source leaves out a ticker, ETFIQ fills it from the same security in another fund’s book; names are set in title case where the source used capitals. How books are read.

Weights are as the source states them, largest first.

Where to next

IBB fund page→Overlap of IBB with another fund→Which ETFs hold a company→Compare two funds→How books are read→

Where these figures came from

iShares (BlackRock) ↗

ETFIQ links to the documents behind every figure; a link is not an endorsement. ETFIQ is an independent publisher and makes no recommendations; every figure is calculated from published data. Standards and sources →

Cite this pageCitation, APA and Markdown

ETFIQ, Holdings of IBB, data as of Oct 13, 2026. https://etfiq.com/funds/ibb/holdings/

Open data →

Free to use with attribution for figures ETFIQ computes; issuer data stays under its owner's terms. The underlying files are at Open data.

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