1. Astrazeneca PLC
2. Bavarian Nordic A/S
3. Bharat Biotech International Ltd.
4. CanSino Biologics Inc.
5. Emergent BioSolutions Inc.
6. GlaxoSmithKline PLC
7. Johnson & Johnson Services Inc.
8. Merck & Co. Inc.
9. Moderna Inc.
10. Pfizer Inc.
11. Sanofi S.A.
12. Seqirus USA Inc.
13. Serum Institute of India Pvt. Ltd.
14. Sinovac Biotech Ltd.
15. Vaxine Pty Ltd.