EMS/ODM companies are being re-rated from contract manufacturers to AI infrastructure platforms -- CLS, JBL, SANM, FLEX combined AI-related revenue is approaching $50B with 50-95% growth rates and vertical integration into power equipment

The electronics manufacturing services sector is undergoing a structural re-rating. Celestica, Jabil, Sanmina, Flex, and Plexus are no longer pure-play contract manufacturers -- they are becoming AI infrastructure platform companies. Combined AI-related revenue across these companies is approaching $50B in FY2026 with growth rates ranging from 50% to 95%. Celestica's 2027 revenue growth is expected to be 'significantly more than $6.5B.' Flex is spinning off its Cloud & Power Infrastructure business at 65-75% FY27 revenue growth. TTMI's AI-driven PCB and advanced substrate business grew 61%. The vertical integration trend is the most investable development. Sanmina disclosed it is 'expanding energy business for AI data centers, all the way from engineering design to full system and vertical integration. Transformers -- we're investing in that business.' Flex acquired Electrical Power Products (EP2) for utility-grade grid modernization and secured a multi-year Google contract spanning power, thermal, and compute -- the 'grid to chip' value chain. This blurs the boundary between EMS companies and power/energy equipment providers. Benchmark Electronics' liquid cooling capabilities are 'seeing traction in clustered AI solutions.' Plexus reported record demand. The PCB and advanced substrate supply chain (TTMI 61% growth) is becoming a critical chokepoint as AI server complexity drives content-per-board expansion. These companies own manufacturing capacity that cannot be replicated quickly, creating a durable competitive advantage.