1. 3M Company
2. Asahi Kasei Corporation
3. Axeon Water Technologies
4. Corning Incorporated
5. DuPont de Nemours Inc.
6. GE Water & Process Technologies
7. GEA Group AG
8. Huber SE
9. Hydranautics by Nitto Denko Corporation
10. Koch Separation Solutions Inc.
11. Lanxess AG
12. Lenntech B.V.
13. LG Chem Ltd.
14. MANN+HUMMEL International GmbH & Co. KG
15. Merck KGgA
16. Pall Corporation by Danaher Corporation
17. Parker-Hannifin Corporation
18. PCI Membrane by Filtration Group Corporation
19. Pentair PLC
20. Permionics Membranes Private Limited
21. Samco Technologies Inc.
22. Suez SA
23. Synder Filtration Inc.
24. Toray Industries Inc.
25. Toyobo Co. Ltd.