• Corning Incorporated
• Optical Cable Corporation
• Sterlite Technologies Limited
• Prysmian Group
• Furukawa Electric Co. Ltd.
• Sumitomo Electric Industries
Ltd.
• Yangtze Optical Fibre and Cable Joint Stock Limited Company
• Hengtong Group Co. Ltd.
• Fujikura Ltd.
• Shin-Etsu Chemical Co. Ltd.