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Deloitte Reviews

London, England

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Deloitte Touche Tohmatsu Limited, commonly known as Deloitte, is a leading multinational professional services network and stands as the largest professional services organization globally by both revenue and headcount. Headquartered in London, United Kingdom, Deloitte is recognized as one of the prominent "Big Four" accounting firms alongside PwC, EY, and KPMG. The organization operates as a private company limited by guarantee, incorporated in England and Wales, and coordinates a vast decentralized network of independent member firms spanning more than 150 countries and territories worldwide. Founded originally in 1845 by the pioneering accountant William Welch Deloitte in London, the firm has established a rich 180-year history marked by historic expansions, including its pivotal merger with Touche Ross in 1989 and the later acquisition of the Monitor Group strategy consulting business. The core operations and portfolio of Deloitte are divided across several major business segments, enabling it to deliver comprehensive solutions across almost all corporate functions. Its primary business verticals encompass Audit and Assurance, Management Consulting, Tax, Financial Advisory, Risk Advisory, and Legal services. In the audit and assurance vertical, the firm provides traditional accounting, external auditing, corporate reporting assurance, and internal IT controls management, serving as a critical pillar for public trust in capital markets. The consulting segment is an industry powerhouse that guides global clients through complex strategic, analytical, and operational transformations, housing specialized practices like Deloitte Digital, Human Capital strategy, and Enterprise Technology performance. Through its financial and risk advisory arms, Deloitte offers sophisticated support for mergers and acquisitions, transactions, forensic and financial crime investigations, cyber security, and regulatory compliance. Additionally, its tax and legal experts help multinational enterprises handle transfer pricing, minimize systemic liabilities, and deploy modern tax technology systems. On a global scale, Deloitte maintains an immense operational footprint, employing approximately 470,000 professionals as of 2025. This extensive talent pool enables the network to service an elite clientele, including nearly 90 percent of the Fortune Global 500 alongside thousands of private enterprises and middle-market companies across sectors like consumer business, energy, financial services, life sciences, healthcare, and telecommunications. Financially, the Deloitte network continues a robust growth trajectory, reporting a massive consolidated global revenue of US$70.5 billion for the fiscal year 2025. The global network is led under the strategic governance of Global Chairperson Anna Marks and Global Chief Executive Officer Joseph B. Ucuzoglu. Through its purpose-driven initiatives, Deloitte heavily integrates Environmental, Social, and Governance frameworks, dedicating significant resources toward driving societal change, promoting environmental sustainability, and embedding cutting-edge generative artificial intelligence capabilities into its next-generation client service offerings.