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CEO: Bob Sternfels Revenue: US $ 16bn Founded: 1926

A century old this year, McKinsey has remade itself around AI. Its finances stay private, but the Financial Times reports a headcount cut of about 10 %, to around 40,000, the biggest in its history. Global Managing Partner Bob Sternfels leads the shift. QuantumBlack drives client work, while internal platform Lilli reaches nearly three-quarters of employees and fields hundreds of thousands of prompts a month. That machinery targets the cost, capital and growth questions that define its CFO work. financechief. com 27