EY (Ernst & Young Global Limited) is a global professional services firm and one of the "Big Four" accounting firms. With its headquarters in London, EY operates in over 150 countries with more than 400,000 employees. The company provides a range of services, including assurance, tax, consulting, and strategy and transactions. EY is dedicated to building a better working world by helping clients and communities achieve their potential with trusted insights and innovative solutions. The firm is known for its strong focus on technology, including its global AI platform, EY.ai, and its commitment to sustainability. EY has also been recognized for its inclusive workplace culture, earning a spot on Fortune's "100 Best Companies to Work For" in 2024.