Amphenol designs and manufactures electrical connectors, cables, antennas, and sensors — the components that move signals, data, and power through virtually any electronic system. The company sells to thousands of OEMs across defense, aerospace, automotive, industrial, telecom, and IT markets, with no single customer exceeding 10% of sales. Amphenol operates through three segments: Communications Solutions (~52% of sales), covering high-speed interconnects, RF products, and antennas with heavy exposure to AI data centers; Harsh Environment Solutions (~26%), ruggedized connectors for defense and aerospace; and Interconnect and Sensor Systems (~22%), sensors and power interconnects for automotive and industrial applications. AI infrastructure has become the dominant growth driver, as GPU-dense systems require unusually high interconnect content per rack. Amphenol's business model centers on design-in selling — engineering its components into customers' products during the development phase, creating sticky, recurring revenue over the life of each program. The cost structure is largely fixed, so volume growth drives meaningful margin expansion. Amphenol also runs an active acquisition program, having spent roughly $3.8B on five deals in 2025, followed by the ~$10.5B acquisition of CommScope in January 2026, which added fiber optic interconnect to complement Amphenol's existing copper and power capabilities. Acquired businesses retain their management teams and operate independently. Amphenol manufactures across 40+ countries with ~300 facilities, deliberately producing close to customers to reduce supply chain and geopolitical risk.