Big Four Accounting Firms: Growth, Mergers, & Impact
Discover the dominance of the Big Four accounting firms—Deloitte, PwC, EY, and KPMG—as they shape the global financial landscape with their expertise in audit, tax, consulting, and advisory services. Explore their histories, mergers, innovative achievements, and influence on Fortune 500 companies and startups alike. With a combined workforce of over 1.3 million professionals and operations spanning more than 150 countries, these firms embody excellence and set industry standards for innovation and professional services.