It's not just jobs on the line — AI threatens the Big Four's dominance

EY, Deloitte, KPMG, and PwC make up the Big Four.

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• The Big Four dominate the professional services industry.
• AI may disrupt not just job roles, but their organizational structure, business models, and pricing structures.
• Meanwhile, some midsize firms say they are better placed to adapt quickly and benefit from AI.

The Big Four — Deloitte, PwC, EY, and KPMG — are a select and powerful few. They dominate the professional services industry and have done so for decades.