JPMorgan Chase became the largest bank in the United States by assets after acquiring Bank One in 2004.
The merger combined J.P. Morgan Chase with Bank One, whose chairman and chief executive Jamie Dimon became the leader of the combined company. The transaction strengthened JPMorgan Chase’s consumer-banking and credit-card operations.
JPMorgan Chase’s modern structure also reflects the 2000 merger of J.P. Morgan and Chase Manhattan. The company now operates consumer banking, commercial banking, investment banking, asset management, and markets businesses.
Bank size can be measured in several ways, including assets, deposits, market capitalization, or branch count. Those measures do not always produce the same ranking, which is why a question must specify the comparison used.