Moody's Corporation operates as a global leader in risk assessment, divided into two main segments: Moody's Investors Service and Moody's Analytics. Moody's Investors Service is dedicated to issuing credit ratings and providing detailed assessments for a diverse range of debt obligations and the entities that issue them.

This encompasses corporate, financial institution, governmental, and structured finance securities across approximately 140 nations. These ratings are made publicly available through press releases, digital media, and real-time financial information systems.

Its vast scope includes ratings for thousands of non-financial corporations, financial institutions, public finance issuers, sovereign and sub-sovereign governments, supranational bodies, infrastructure projects, and structured finance deals. The Moody's Analytics segment develops and provides a comprehensive suite of products and services designed to support the risk management needs of institutional participants in financial markets.

This includes subscription-based research, data, and analytical tools such as credit ratings, quantitative credit scores, economic forecasts, business intelligence, commercial real estate data, and specialized training and certification programs. Additionally, this segment offers offshore analytical and research services, along with advanced software solutions for risk management.

Originally founded in 1900 and headquartered in New York, New York, the company was known as Dun and Bradstreet Company before officially becoming Moody's Corporation in September 2000.