# IBB holdings: all 245 positions

> All 245 IBB holdings with weights, as of Oct 13, 2026. The top 3 are GILD 8.44%, AMGN 8.01% and VRTX 7.44%. Download the full list as a CSV.

Data as of Oct 13, 2026. Rebuilt every trading night.

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.

Source: iShares (BlackRock) (https://www.ishares.com/us/products/239699/x/latest-holdings.csv).

| # | 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% |
| | 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% |

The largest 25 of 245 positions are shown. All of them: https://etfiq.com/funds/ibb/holdings/ibb-holdings.csv (CSV) or https://etfiq.com/data/books/ibb.json (JSON).

Fund page: https://etfiq.com/funds/ibb

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