| 1 | VRTX | Vertex Pharmaceuticals Incorporated | 8.65% |
| 2 | GILD | Gilead Sciences, Inc. | 7.78% |
| 3 | AMGN | Amgen Inc. | 7.64% |
| 4 | REGN | Regeneron Pharmaceuticals, Inc. | 6.96% |
| 5 | ALNY | Alnylam Pharmaceuticals, Inc. | 4.47% |
| 6 | INSM | Insmed Incorporated | 3.20% |
| 7 | ARGX | argenx SE | 2.76% |
| 8 | NTRA | Natera, Inc. | 2.66% |
| 9 | BIIB | Biogen Inc. | 2.37% |
| 10 | ONC | BeOne Medicines AG | 2.11% |
| 11 | ILMN | Illumina, Inc. | 1.81% |
| 12 | INCY | Incyte Corporation | 1.79% |
| 13 | UTHR | United Therapeutics Corporation | 1.73% |
| 14 | RVMD | Revolution Medicines, Inc. | 1.69% |
| 15 | GMAB | Genmab A/S | 1.46% |
| 16 | MEDP | Medpace Holdings, Inc. | 1.16% |
| 17 | NBIX | Neurocrine Biosciences, Inc. | 1.14% |
| 18 | IONS | Ionis Pharmaceuticals, Inc. | 1.10% |
| 19 | BBIO | BridgeBio Pharma, Inc. | 1.10% |
| 20 | MRNA | Moderna, Inc. | 1.03% |
| 21 | EXEL | Exelixis, Inc. | 0.99% |
| 22 | BMRN | BioMarin Pharmaceutical Inc. | 0.96% |
| 23 | CRL | Charles River Laboratories International, Inc. | 0.93% |
| 24 | MDGL | Madrigal Pharmaceuticals, Inc. | 0.92% |
| 25 | TECH | Bio-Techne Corporation | 0.87% |
| View IBB holdings |
