1. Air Liquide S.A.
2. Axens Group
3. BASF SE
4. Bechtel Corporation
5. Black & Veatch Corporation
6. Experitec Inc.
7. Exxon Mobil Corporation
8. Honeywell International Inc.
9. John Wood Group PLC
10. KT - Kinetics Technology SPA
11. Linde PLC
12. Shell PLC
13. Sulzer Ltd.
14. Topsoe A/S
15. WorleyParsons Limited