Lumentum Holdings Inc. operates primarily through two business segments: Cloud & Networking and Industrial Tech. The Cloud & Networking segment, which generates the vast majority of the company's revenue, supplies optical and photonic components, modules, and subsystems to cloud operators and telecom service providers. These products are critical for data center interconnects, AI/ML infrastructure, and long-haul or submarine network deployments. The Industrial Tech segment produces high-performance solid-state, fiber, diode, and gas lasers used in precision manufacturing, semiconductor processing, and 3D sensing applications. Spun off from JDS Uniphase in 2015, Lumentum has established a strong competitive position in the optical communications market by capitalizing on the transition to high-speed, light-based networking. The company maintains a global footprint with significant manufacturing and R&D operations across North America, Asia, and Europe.