Prysmian Group commands approximately 9-15% of the global market as the world's largest cable manufacturer and a leading supplier of fiber optic cables. Based on 2025 rankings from industry sources like Owire and TSCables, the top manufacturers are evaluated on market share, innovation, and global reach. Use it as a fast shortlist when planning new FTTH/FTTA or data-center builds. We note certifications. OFS, a leading manufacturer of fiber optic solutions, provides high-quality optical fiber, fiber optic cables, and connectivity solutions for a variety of applications. These applications include telecommunications, medical, aerospace, defense, industrial, and more. The company is known for its. Corning Inc.