Credit Suisse Group AG (French pronunciation: [kʁe.di sɥis], lit. 'Swiss Credit') was a global investment bank and financial services firm founded and based in Switzerland. According to UBS, eventually Credit Suisse was to be fully integrated into UBS. While the integration was yet to be completed, both banks are operating separately. However, on May 31, 2024, it was announced that Credit Suisse ceased to exist. Headquartered in Zürich, as a standalone firm, it maintained offices in all major financial centres around the world and provided services in investment banking, private banking, asset management, and shared services. It was known for strict bank–client confidentiality and banking secrecy. The Financial Stability Board considered it to be a global systemically important bank. Credit Suisse was also a primary dealer and Forex counterparty of the Federal Reserve in the United States.
Credit Suisse was founded in 1856 to fund the development of Switzerland's rail system. It issued loans that helped create Switzerland's electrical grid and the European rail system. In the 1900s, it began shifting to retail banking in response to the elevation of the middle class and competition from fellow Swiss banks UBS and Julius Bär. Credit Suisse partnered with First Boston in 1978 before buying a controlling share of the bank in 1988. From 1990 to 2000, the company purchased institutions such as Winterthur Group, Swiss Volksbank, Swiss American Securities Inc. (SASI), and Bank Leu.