PricewaterhouseCoopers, commonly known as PwC, is a global professional services firm headquartered in London, England. It is one of the "Big Four" accounting firms, providing services in audit, tax, and consulting. With a presence in over 157 countries, PwC employs hundreds of thousands of professionals who assist businesses in managing risks and improving performance. Founded in 1998 through a merger of Price Waterhouse and Coopers & Lybrand, PwC has grown to become a leader in the industry. The firm serves a diverse range of clients, including multinational corporations, governments, and non-profit organizations, helping them navigate complex financial and regulatory environments.