| Rank | Holder | SharesFloat % | Change | Date reported |
|---|---|---|---|---|
| 1 | Baker Bros Advisors LP | 36.39M (27.84%) | 0.00 Increased by 0.00% | Mar 31, 26 |
| 2 | Vanguard Group Inc | 11.18M (8.55%) | -202.51K Decreased by -1.81% | Dec 31, 25 |
| 3 | FMR Inc | 10.85M (8.30%) | -2.51M Decreased by -23.10% | Mar 31, 26 |
| 4 | BlackRock Inc | 9.65M (7.39%) | 291.84K Increased by +3.02% | Mar 31, 26 |
| 5 | T. Rowe Price Associates, Inc. | 8.28M (6.33%) | -1.09M Decreased by -13.21% | Mar 31, 26 |
| 6 | State Street Corporation | 8.11M (6.21%) | 5.66M Increased by +69.73% | Mar 31, 24 |
| 7 | State Street Corp | 7.03M (5.38%) | 391.80K Increased by +5.57% | Mar 31, 26 |
| 8 | Vanguard Capital Management, LLC | 5.71M (4.37%) | 5.71M Increased by +100.00% | Mar 31, 26 |
| 9 | Vanguard Portfolio Management, LLC | 5.23M (4.00%) | 5.23M Increased by +100.00% | Mar 31, 26 |
| 10 | UBS Group AG | 3.68M (2.82%) | 2.81M Increased by +76.34% | Mar 31, 26 |
| 11 | Geode Capital Management, LLC | 3.32M (2.54%) | 168.37K Increased by +5.08% | Mar 31, 26 |
| 12 | Citadel Advisors Llc | 2.48M (1.89%) | 2.27M Increased by +91.81% | Dec 31, 25 |
| 13 | D. E. Shaw & Co LP | 2.24M (1.72%) | 1.83M Increased by +81.48% | Mar 31, 26 |
| 14 | Balyasny Asset Management LLC | 1.70M (1.30%) | 1.32M Increased by +77.26% | Mar 31, 25 |
| 15 | Morgan Stanley - Brokerage Accounts | 1.65M (1.26%) | 724.01K Increased by +43.86% | Mar 31, 26 |
| 16 | Polymer Capital Management (Hk) Ltd | 1.42M (1.09%) | 603.88K Increased by +42.49% | Dec 31, 25 |
| 17 | NORGES BANK | 1.37M (1.05%) | -15.92K Decreased by -1.16% | Dec 31, 25 |
| 18 | Pictet Asset Manangement SA | 1.32M (1.01%) | -60.60K Decreased by -4.58% | Mar 31, 26 |
| 19 | APEIRON CAPITAL Ltd | 1.31M (1.00%) | -100.00 Decreased by -0.01% | Mar 31, 26 |
| 20 | abrdn PLC | 1.29M (0.99%) | 154.14K Increased by +11.94% | Dec 31, 24 |
| Rank | Holder | SharesFloat % | Change | Date reported |
|---|---|---|---|---|
| 1 | State Street® SPDR® S&P® Biotech ETF | 5.39M (4.12%) | -33.15K Decreased by -0.62% | May 31, 26 |
| 2 | Vanguard Total Stock Mkt Idx Inv | 3.77M (2.88%) | 11.75K Increased by +0.31% | Apr 30, 26 |
| 3 | Fidelity Growth Compy Commingled Pl S | 3.53M (2.70%) | 168.94K Increased by +4.79% | Apr 30, 26 |
| 4 | T. Rowe Price Health Sciences | 3.51M (2.69%) | -2.67M Decreased by -75.97% | Apr 30, 26 |
| 5 | Vanguard Small Cap Index | 2.68M (2.05%) | -10.84K Decreased by -0.40% | Apr 30, 26 |
| 6 | Fidelity Growth Company Fund | 2.65M (2.03%) | 131.80K Increased by +4.97% | Apr 30, 26 |
| 7 | SPDR® S&P Biotech ETF | 2.43M (1.86%) | 5.41K Increased by +0.22% | Aug 31, 25 |
| 8 | iShares Russell 2000 ETF | 2.31M (1.77%) | 0.00 Increased by 0.00% | May 31, 25 |
| 9 | Vanguard Institutional Extnd Mkt Idx Tr | 1.74M (1.33%) | 13.60K Increased by +0.78% | Apr 30, 26 |
| 10 | Vanguard Small Cap Value Index Inv | 1.72M (1.32%) | 12.18K Increased by +0.71% | Apr 30, 26 |
| 11 | Fidelity® Small Cap Index | 1.12M (0.85%) | 29.95K Increased by +2.69% | Oct 31, 23 |
| 12 | Fidelity Select Biotechnology | 1.07M (0.82%) | -21.50K Decreased by -2.01% | Apr 30, 26 |
| 13 | Fidelity Contrafund | 1.04M (0.79%) | 0.00 Increased by 0.00% | Feb 28, 26 |
| 14 | Polar Capital Biotech S Inc | 1.00M (0.77%) | 0.00 Increased by 0.00% | Jul 31, 25 |
| 15 | Fidelity Small Cap Index | 932.02K (0.71%) | 2.56K Increased by +0.28% | May 31, 25 |
| 16 | BlackRock Health Sciences Opps Inv A | 924.15K (0.71%) | 0.00 Increased by 0.00% | Apr 30, 26 |
| 17 | Fidelity Extended Market Index | 819.40K (0.63%) | -2.99K Decreased by -0.37% | Apr 30, 26 |
| 18 | Fidelity Select Health Care | 800.00K (0.61%) | -200.00K Decreased by -25.00% | Apr 30, 26 |
| 19 | iShares Biotechnology ETF | 787.98K (0.60%) | 10.62K Increased by +1.35% | May 29, 26 |
| 20 | Fidelity Growth Company K6 | 780.97K (0.60%) | 27.06K Increased by +3.47% | Apr 30, 26 |