1. GSK plc.
2. Johnson & Johnson Services Inc.
3. Pfizer Inc.
4. Sanofi SA
5. Serum Institute of India Pvt. Ltd.
6. SINOVAC Biotech Ltd.
7. Bavarian Nordic A/S
8. Merck & Co. Inc.
9. AstraZeneca Plc.
10. Moderna Inc.