ETF · holdings as filed 2026-06-30
What's inside IBB?
iShares Biotechnology ETF
- Holdings
- 251
- positions in the fund
- Top 10
- 49%
- of fund assets
- Expense ratio
- 0.44%
- net, per year
- Fund size
- $9B
- total net assets
Top 20 holdings
| Rank | Logo | Ticker / Name | Weight | |
|---|---|---|---|---|
| 1 | B  | BISXXBCF INSTITUTIONAL-SL AGNCY | 10.42% | |
| 2 | V  | VRTXVERTEX PHARMACEUTICALS INC | 7.22% | |
| 3 | A  | AMGNAMGEN INC | 6.99% | |
| 4 | G  | GILDGILEAD SCIENCES INC | 6.11% | |
| 5 | R  | REGNREGENERON PHARMACEUTICALS | 4.38% | |
| 6 | A  | ARGXARGENX SE - ADR | 3.36% | |
| 7 | A  | ALNYALNYLAM PHARMACEUTICALS INC | 2.79% | |
| 8 | N  | NTRANATERA INC | 2.58% | |
| 9 | R  | RVMDREVOLUTION MEDICINES INC | 2.48% | |
| 10 | B  | BIIBBIOGEN INC | 2.20% | |
| 11 | I  | ILMNILLUMINA INC | 1.85% | |
| 12 | M  | MRNAMODERNA INC | 1.77% | |
| 13 | I  | INSMINSMED INC | 1.59% | |
| 14 | O  | ONCBEONE MEDICINES LTD-ADR | 1.58% | |
| 15 | I  | INCYINCYTE CORP | 1.56% | |
| 16 | U  | UTHRUNITED THERAPEUTICS CORP | 1.55% | |
| 17 | R  | ROIVROIVANT SCIENCES LTD | 1.27% | |
| 18 | N  | NBIXNEUROCRINE BIOSCIENCES INC | 1.16% | |
| 19 | A  | ASNDASCENDIS PHARMA A/S | 1.15% | |
| 20 | G  | GMABGENMAB A/S -SP ADR | 1.00% |
Top holdings — Health Care
Your 10 largest positions in this sector
1
V
VRTXVERTEX PHARMACEUTICALS INC
7.22%2
A
AMGNAMGEN INC
6.99%3
G
GILDGILEAD SCIENCES INC
6.11%4
R
REGNREGENERON PHARMACEUTICALS
4.38%5
A
ARGXARGENX SE - ADR
3.36%6
A
ALNYALNYLAM PHARMACEUTICALS INC
2.79%7
N
NTRANATERA INC
2.58%8
R
RVMDREVOLUTION MEDICINES INC
2.48%9
B
BIIBBIOGEN INC
2.20%10
I
ILMNILLUMINA INC
1.85%Top holdings — United States
Your 10 largest positions in this country
1
B
BISXXBCF INSTITUTIONAL-SL AGNCY
10.42%2
V
VRTXVERTEX PHARMACEUTICALS INC
7.22%3
A
AMGNAMGEN INC
6.99%4
G
GILDGILEAD SCIENCES INC
6.11%5
R
REGNREGENERON PHARMACEUTICALS
4.38%6
A
ALNYALNYLAM PHARMACEUTICALS INC
2.79%7
N
NTRANATERA INC
2.58%8
R
RVMDREVOLUTION MEDICINES INC
2.48%9
B
BIIBBIOGEN INC
2.20%10
I
ILMNILLUMINA INC
1.85%Geography reflects each issuer's registered business address per SEC EDGAR filings where available, falling back to the exchange or listing where no SEC filing exists — not necessarily where a company's stock is primarily listed (e.g. TSMC is classified as Taiwan even though its ADR trades on the NYSE).
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Data source: official SEC Form N-PORT filings (as of 2026-06-30); expense ratio from SEC prospectus (risk/return) filings. Fund holdings are disclosed quarterly and may reflect a 60-day reporting delay.
Informational and educational only — not investment advice.
Informational and educational only — not investment advice.