| 1 | EXAS | Exact Sciences Corporation | 2.85% |
| 2 | RVMD | Revolution Medicines, Inc. | 2.69% |
| 3 | RNA | Avidity Biosciences, Inc. | 2.37% |
| 4 | NTRA | Natera, Inc. | 2.12% |
| 5 | BBIO | BridgeBio Pharma, Inc. | 2.12% |
| 6 | REGN | Regeneron Pharmaceuticals, Inc. | 2.02% |
| 7 | INSM | Insmed Incorporated | 2.01% |
| 8 | MDGL | Madrigal Pharmaceuticals, Inc. | 1.98% |
| 9 | BIIB | Biogen Inc. | 1.92% |
| 10 | IONS | Ionis Pharmaceuticals, Inc. | 1.90% |
| 11 | UTHR | United Therapeutics Corporation | 1.89% |
| 12 | PRAX | Praxis Precision Medicines, Inc. | 1.89% |
| 13 | MRNA | Moderna, Inc. | 1.84% |
| 14 | ROIV | Roivant Sciences Ltd. | 1.82% |
| 15 | VRTX | Vertex Pharmaceuticals Incorporated | 1.77% |
| 16 | AMGN | Amgen Inc. | 1.75% |
| 17 | CRSP | CRISPR Therapeutics AG | 1.70% |
| 18 | INCY | Incyte Corporation | 1.70% |
| 19 | NBIX | Neurocrine Biosciences, Inc. | 1.70% |
| 20 | EXEL | Exelixis, Inc. | 1.68% |
| 21 | ABBV | AbbVie Inc. | 1.64% |
| 22 | GILD | Gilead Sciences, Inc. | 1.63% |
| 23 | KRYS | Krystal Biotech, Inc. | 1.59% |
| 24 | BMRN | BioMarin Pharmaceutical Inc. | 1.52% |
| 25 | ARWR | Arrowhead Pharmaceuticals, Inc. | 1.51% |
| View XBI holdings |