1. 3M Company
2. Ahlstrom-Munksj? Oyj
3. American Fabric Filter
4. ANDRITZ AG
5. APC Filtration Inc.
6. Autotech Nonwovens Pvt Ltd
7. Berry Global Group Inc.
8. Camfil AB
9. Clear Edge
10. Donaldson Company Inc.
11. Freudenberg Filtration Technologies GmbH & Co. KG
12. Hamon Group
13. Hollingsworth & Vose Company
14. Irema Ireland
15. Johns Manville by Berkshire Hathaway Company
16. Kimberly-Clark Corporation
17. LDX Solutions
18. Lydall Inc.
19. MANN+HUMMEL Gruppe
20. Mitsubishi Heavy Industries
Ltd.
21. Nordic Air Filtration by Hengst Group
22. Sefar AG
23. SLY Inc.
24. TAPC
25. Valmet Oyj