Deutsche Bank AG is a German multinational investment bank and financial services company headquartered in Frankfurt, Germany. Founded on March 10, 1870, in Berlin as a specialist bank for financing foreign trade and promoting German exports, it played a pivotal role in developing Germany's financial services industry by providing finance to industrial customers. The bank expanded rapidly, opening branches in Bremen (1871), Hamburg, Shanghai, and Yokohama (1872), and London (1873). By the end of the 19th century, it had absorbed several German banks and significantly increased its capital under managing director Georg von Siemens. Key mergers included the 1929 amalgamation with Disconto-Gesellschaft, forming Deutsche Bank und Disconto-Gesellschaft, and later acquisitions like Mendelssohn & Co. (1938), Morgan Grenfell (1990), Bankers Trust (1998), and Deutsche Postbank (2010). During World War II and its aftermath, the bank faced investigations and was split into multiple successor institutions in 1947, reuniting as a single entity in 1957.

Throughout the 20th and 21st centuries, Deutsche Bank has grown into one of the world's largest banks, with operations in over 70 countries serving more than 12 million customers. It dual-listed on the Frankfurt Stock Exchange and the New York Stock Exchange (since 2001), and is included in indices like the DAX and Euro Stoxx 50. The bank focuses on corporate banking, investment banking, private banking, and asset management, with strong European roots but significant presence in Asia, North America, and South America. Notable milestones include its involvement in early U.S. railway financing (1872), participation in founding Lufthansa (1926), and the merger forming Daimler-Benz (1926). In the 1990s, it pursued aggressive international expansion, acquiring U.S.-based Bankers Trust to bolster its global investment banking capabilities.

Today, Deutsche Bank emphasizes its strengths in a restructured Corporate Bank (created in 2019), a leading Private Bank, focused investment banking, and asset management. It provides financial services to companies, governments, institutional investors, small and medium-sized businesses, and private individuals globally. With over 90,000 employees and a global network, the bank continues to navigate challenges such as market fluctuations and regulatory scrutiny while maintaining its position as a key player in international finance.