| Amount | Holding | 
|---|---|
| 7.25% | Vertex Pharmaceuticals Inc | 
| 6.48% | Amgen Inc | 
| 5.73% | Gilead Sciences Inc | 
| 5.72% | Regeneron Pharmaceuticals Inc | 
| 4.77% | Biogen Inc | 
| 4.77% | Illumina Inc | 
| 3.88% | Iovance Biotherapeutics Inc | 
| 3.59% | GW Pharmaceuticals PLC ADR | 
| 3.25% | PTC Therapeutics Inc | 
| 2.45% | Deciphera Pharmaceuticals Inc |