KPMG International Limited is a British multinational professional services network and one of the Big Four accounting organizations, alongside Deloitte, EY, and PwC. It provides audit, tax, and advisory services to businesses, governments, and organizations worldwide, with a focus on financial reporting, risk management, regulatory compliance, and consulting in areas such as sustainability, technology, and digital transformation. KPMG operates as a network of independent member firms, emphasizing global coordination while respecting local regulations and expertise. The firm has been involved in high-profile audits and advisory roles for major corporations and has faced scrutiny over various accounting scandals, though it maintains a reputation for professional standards and innovation in services like AI-driven analytics and ESG reporting.

The origins of KPMG trace back to the late 19th century, with one of its predecessor firms, the Deutsch-Amerikanische Treuhand-Gesellschaft, founded on March 27, 1890, in Berlin, Germany, as the oldest German auditing company. The modern KPMG was formed through a landmark merger on January 1, 1987, between KMG (Klynveld Main Goerdeler) and Peat Marwick, creating the first mega-merger in the accounting industry and instantly generating worldwide revenues of approximately $2.7 billion. This merger consolidated operations in the United States and globally, initially retaining the name Peat Marwick in some regions before standardizing as KPMG. Over the subsequent decades, KPMG expanded its service lines to include specialized teams for industries like financial services, healthcare, manufacturing, and government, while reorganizing into geographical practice areas to enhance client-focused delivery.

As of December 2024, KPMG comprises 46 independent member firms operating in over 140 countries, employing hundreds of thousands of professionals. The network is headquartered in London and continues to evolve, with a history spanning more than 150 years of involvement in shaping economic and regulatory landscapes. Notably, early in her career, Nikki Haley worked as an accountant at KPMG, highlighting the firm's role in developing professional talent across diverse fields.