What does ey do
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Last updated: April 4, 2026
Key Facts
- EY operates in over 150 countries worldwide.
- It is one of the 'Big Four' accounting firms, alongside Deloitte, PwC, and KPMG.
- EY was founded in 1989 through the merger of Ernst & Whinney and Arthur Young.
- The firm employs over 300,000 people globally.
- EY's services span across audit, consulting, tax, strategy, and transactions.
What is EY?
EY, officially known as Ernst & Young Global Limited, is a multinational professional services network. Headquartered in London, England, it is one of the largest professional services networks in the world and is considered one of the 'Big Four' accounting firms, alongside Deloitte, PwC, and KPMG. The 'Big Four' are the four largest professional services networks, offering audit, assurance, tax, consulting, and advisory services to all of the largest public companies in the world, as well as numerous private companies.
History of EY
The origins of EY can be traced back to 1849 with the founding of Harding & Pullein in London. Over the decades, various firms merged and evolved. The most significant merger that formed the current EY structure occurred in 1989 when Ernst & Whinney merged with Arthur Young to form Ernst & Young. In 2013, the firm rebranded globally, shortening its name to EY, while retaining Ernst & Young as its legal name.
Services Offered by EY
EY provides a comprehensive range of services across several key areas:
Assurance (Audit)
This is perhaps EY's most well-known service. The assurance practice helps companies maintain the integrity and reliability of their financial reporting. This includes statutory audits, internal audit support, and other assurance services designed to build trust with stakeholders, investors, and regulatory bodies. EY's auditors examine financial statements to provide an independent opinion on whether they are presented fairly and in accordance with relevant accounting standards.
Tax
EY's tax services assist businesses in navigating the complexities of tax laws and regulations across different jurisdictions. This includes corporate tax planning, compliance, international tax services, transfer pricing, indirect taxes (like VAT and GST), and personal tax advisory for executives. Their goal is to help clients manage tax risks, improve tax efficiency, and comply with all legal obligations.
Transactions
The transaction advisory services team helps clients throughout the entire transaction lifecycle, from mergers and acquisitions (M&A) to divestitures and capital raising. This involves due diligence, valuation, financial modeling, integration planning, and post-transaction support. EY assists both buyers and sellers in achieving their strategic objectives in complex deal-making scenarios.
Consulting
EY's consulting arm offers a wide array of services aimed at improving business performance and addressing strategic challenges. This can include digital transformation, cybersecurity, data analytics, supply chain management, human capital consulting, and risk advisory. Consultants work with clients to identify opportunities, implement solutions, and drive sustainable growth and operational efficiency.
Strategy and Transactions (Strategy)
This segment often works closely with the transactions team but also focuses on broader strategic initiatives. It helps organizations define their long-term vision, market entry strategies, growth plans, and operational transformations. They leverage market intelligence and data analysis to guide clients in making critical strategic decisions.
Who are EY's Clients?
EY serves a diverse range of clients, from the world's largest multinational corporations to emerging growth companies, public sector organizations, and private businesses. Their client base spans virtually every industry, including technology, financial services, consumer products, energy, healthcare, and industrials. The firm's global reach allows it to serve clients operating in multiple countries, addressing their international business needs.
EY's Global Presence and Impact
With a presence in over 150 countries and a workforce exceeding 300,000 professionals, EY has a significant global footprint. This extensive network enables them to provide consistent, high-quality services to clients wherever they operate. The firm is committed to building a better working world by collaborating with businesses, governments, and communities to address pressing global issues, foster innovation, and promote sustainable economic development.
EY's Values and Culture
EY emphasizes a culture of collaboration, integrity, and respect. The firm strives to create an inclusive environment where diverse perspectives are valued, and employees are empowered to reach their full potential. They often highlight their commitment to ethical conduct and corporate social responsibility, aiming to make a positive impact on society through their work and community engagement.
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Sources
- Ernst & Young - WikipediaCC-BY-SA-4.0
- Who we are - EYfair-use
- Big Four: Deloitte, PwC, EY, and KPMG - Investopediafair-use
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