1. Advanced Specialty Gases
2. AGC Group
3. Air Liquide S.A.
4. American Gas Products
5. BOC Limited
6. Concorde Specialty Gases Inc.
7. Fujian Shaowu Yongfei Chemical Co. Ltd.
8. GENERON
9. Kanto Denka Kogyo Co. Ltd.
10. Linde PLC
11. Matheson Tri-Gas Inc.
12. Merck KGaA
13. SHOWA DENKO K.K.
14. Solvay S.A.
15. WestAir Gases & Equipment Inc.