| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Merck & Co., Inc. | 16% | 14,044,943 | 0 | 14,044,943 | /s/ Kelly Grez | Kelly Grez/Corporate Secretary | |
| Merck Sharp & Dohme LLC | 16% | 14,044,943 | 0 | 14,044,943 | /s/ Jon Filderman | Jon Filderman/Vice President |