1. Air Liquide S.A.
2. Air Products and Chemicals Inc.
3. Les Gaz Industriels Ltd.
4. Linde PLC
5. Matheson Tri-Gas Inc.
6. Messer SE & Co. KGaA
7. National Gases Limited
8. Parker-Hannifin Corporation
9. Purity Cylinder Gases Inc.
10. Taiyo Nippon Sanso Corporation