Company List
 Company |
 Headquarters |
 Year Founded |
 Holding Type |
|---|---|---|---|
| DuPont | Wilmington, Delaware, US | 1802 | Public |
| Pall Corp | Port Washington, USA | 1946 | Private |
| Veolia | Paris, France | 1853 | Public |
| Asahi Kasei | Tokyo, Japan | 1931 | Public |
| Pentair | London, UK | 1966 | Public |
| 3M | Saint Paul, USA | 1902 | Public |
| Hydranautics | Oceanside, USA | 1963 | Public |
| GEA | Düsseldorf, Germany | 1881 | Private |
| Koch Separation | Wilmington, USA | 1963 | Private |
| LG Chem | Seoul, South Korea | 1947 | Public |
| Mann+Hummel | Ludwigsburg, Germany | 1941 | Private |
| Aquatech | Canonsburg, USA | 1981 | Private |
| Merck KGaA | New Jersey, US | 1921 | Public |
| Filtration Group | Austin, USA | 2009 | Private |
| Ion Exchange | Mumbai, India | 1964 | Public |
| Parker Hannifin | Cleveland, Ohio, US | 1917 | Public |
| TORAY INDUSTRIES INC | Tokyo, Japan | 1926 | Public |
