1. Ahlstrom Oyj
2. Amcor Plc
3. AR Packaging Group AB
4. Billerud AB
5. BillerudKorsnas AB
6. Brodrene Hartmann A/S
7. Bumaga BV
8. DS Smith PLC
9. Georgia-Pacific LLC
10. Huhtamaki Oyj
11. International Paper Company
12. Mayr-Melnhof Karton AG
13. Mondi PLC
14. NEFAB GROUP
15. Oji Fibre Solutions
16. Pratt Industries Inc.
17. Rengo Co. Ltd.
18. Reynolds Group Holdings Ltd.
19. Smurfit Kappa Group PLC
20. Sonoco Products Company
21. Stora Enso Oyj
22. Tetra Pak Group
23. U.S. Corrugated Inc.
24. UFP Technologies Inc.
25. Westrock Company