| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Baker Bros. Advisors LP | 18.9% | 7.75M | 7.75M | 0 | /s/ Scott L. Lessing | Scott L. Lessing / President By: Baker Bros. Advisors (GP) LLC, its general partner | 0001263508 |
| Baker Bros. Advisors (GP) LLC | 18.9% | 7.75M | 7.75M | 0 | /s/ Scott L. Lessing | Scott L. Lessing / President | 0001580575 |
| Julian C. Baker | 18.9% | 7.75M | 7.75M | 0 | /s/ Julian C. Baker | Julian C. Baker | 0001087939 |
| Felix J. Baker | 18.9% | 7.75M | 7.75M | 0 | /s/ Felix J. Baker | Felix J. Baker | 0001087940 |