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EY

CEO: Janet Truncale Revenue: US $ 53.2bn Founded: 1989

EY’ s consulting line contributed US $ 16.4bn in FY2025, growing 5.2 %, with its EY-Parthenon strategy arm adding a further US $ 6.2bn. Janet Truncale, the first woman to lead a Big Four firm globally, has built that growth around EY. ai, the firm’ s AI platform. It rests on a US $ 1.4bn investment and includes EY’ s own large language model, EYQ. The strategy is to fold AI through audit, tax and advisory rather than sell it as a standalone service. financechief. com 29