Big Four (banking) in the context of "Citigroup"

The European Central Bank (ECB) is the central component of the Eurosystem and the European System of Central Banks (ESCB) as well as one of seven institutions of the European Union. It is one of the world's most important central banks with a balance sheet total of around 7 trillion.

The ECB Governing Council makes monetary policy for the Eurozone and the European Union, administers the foreign exchange reserves of EU member states, engages in foreign exchange operations, and defines the intermediate monetary objectives and key interest rate of the EU. The ECB Executive Board enforces the policies and decisions of the Governing Council, and may direct the national central banks when doing so. The ECB has the exclusive right to authorise the issuance of euro banknotes. Member states can issue euro coins, but the volume must be approved by the ECB beforehand. The bank also operates the T2 payments system.

JPMorgan Chase & Co. (stylized as JPMorganChase) is an American multinational banking institution headquartered in New York City and incorporated in Delaware. It is the largest bank in the United States, and the world's largest bank by market capitalization as of 2025. As the largest of the Big Four banks in America, the firm is considered systemically important by the Financial Stability Board. Its size and scale have often led to enhanced regulatory oversight as well as the development of an internal "Fortress Balance Sheet". The firm has had its global headquarters on 270 Park Avenue in Midtown Manhattan since 2025.

JPMorgan Chase was created in 2000 by the merger of New York City banks J.P. Morgan & Co. and Chase Manhattan Company. Through its predecessors, the firm's early history can be traced to 1799, with the founding of what became the Bank of the Manhattan Company. J.P. Morgan & Co. was founded in 1871 by the American financier J. P. Morgan, who launched the House of Morgan on 23 Wall Street as a national purveyor of commercial, investment, and private banking services. Today, the firm is a major provider of investment banking services, through corporate advisory, mergers and acquisitions, sales and trading, and public offerings. Their private banking franchise and asset management division are among the world's largest in terms of total assets. Its retail banking and credit card offerings are provided via the Chase brand in the United States and United Kingdom.

The Bank of America Corporation (Bank of America; often abbreviated BAC or BofA) is an American multinational investment bank and financial services holding company headquartered at the Bank of America Corporate Center in Charlotte, North Carolina, with investment banking and auxiliary headquarters in Manhattan. The bank was founded by the merger of NationsBank and Bank of America in 1998. It is the second-largest banking institution in the United States and the second-largest bank in the world by market capitalization, both after JPMorgan Chase. Bank of America is one of the Big Four banking institutions of the United States. and one of eight systemically important financial institutions in the United States. It serves about 10 percent of all American bank deposits, in direct competition with JPMorgan Chase, Citigroup, and Wells Fargo. Its primary financial services revolve around commercial banking, wealth management, and investment banking.Through mergers, the oldest branch of the Bank of America franchise dates back to 1784, when Massachusetts Bank was chartered, becoming the first federally chartered joint-stock-owned bank in the United States. Another branch of its history goes back to the American-based Bank of Italy, founded by Amadeo Pietro Giannini in 1904, which provided various banking services to Italian immigrants who faced service discrimination at the time. Headquartered in San Francisco, California, Giannini acquired Banca d'America e d'Italia in 1922 and eventually did business as Bank of America.

In the 1950s, the passage of landmark federal banking legislation facilitated rapid growth, quickly establishing prominent shares for the present bank's predecessors. After suffering significant losses during the 1998 Russian financial crisis, BankAmerica, as it was then known, was acquired by the Charlotte-based NationsBank for $62 billion. Following what was then the largest bank acquisition in history, the Bank of America Corporation was founded. Through a series of mergers and acquisitions, it built upon its commercial banking business by establishing Merrill Lynch for wealth management and Bank of America Merrill Lynch for investment banking in 2008 and 2009, respectively, and since renamed BofA Securities.

Wells Fargo & Company is an American multinational financial services company with a significant global presence. The company operates in 35 countries and serves over 70 million customers worldwide. It is a systemically important financial institution according to the Financial Stability Board, and is considered one of the "Big Four Banks" in the United States, alongside JPMorgan Chase, Bank of America, and Citigroup.

The company's primary subsidiary is Wells Fargo Bank, N.A., a national bank that designates its Sioux Falls, South Dakota, site as its main office (and therefore is treated by most U.S. federal courts as a citizen of South Dakota). It is the fourth-largest bank in the United States by total assets and is also one of the largest as ranked by bank deposits and market capitalization. It has 8,050 branches and 13,000 automated teller machines and 2,000 stand-alone mortgage branches. It is the second-largest retail mortgage originator in the United States, originating one out of every four home loans, and services $1.8 trillion in home mortgages, one of the largest servicing portfolios in the U.S. It is one of the most valuable bank brands. Wells Fargo is ranked 47th on the Fortune 500 list of the largest companies in the U.S.

JPMorgan Chase Bank, N.A., doing business as Chase, is an American national bank headquartered in New York City that constitutes the consumer and commercial banking subsidiary of the American multinational banking and financial services holding company, JPMorgan Chase. The bank was known as Chase Manhattan Bank until it merged with J.P. Morgan & Co. in 2000. Chase Manhattan Bank was formed by the merger of the Chase National Bank and the Manhattan Company in 1955. The bank merged with Chemical Bank New York in 1996 and later merged with Bank One Corporation in 2004 and in 2008 acquired the deposits and most assets of Washington Mutual. In May 2023, it acquired the assets of First Republic Bank.

Chase offers more than 5,000 branches and 15,000 ATMs nationwide and has 18.5 million checking accounts and 25 million debit card users as of 2023. JPMorgan Chase & Co. has 250,355 employees (as of 2016) and operates in more than 100 countries. JPMorgan Chase & Co. had assets of $3.31 trillion in 2022 which makes it the largest bank in the United States as well as the bank with the most branches in the United States and the only bank with a presence in all of the contiguous United States. JPMorgan Chase, through its Chase subsidiary, is one of the Big Four banks of the United States.

Allied Irish Banks, p.l.c. is one of the so-called Big Four commercial banks in the Republic of Ireland. AIB offers a full range of personal, business and corporate banking services. The bank also offers a range of general insurance products such as home, travel and car. It offers life assurance and pensions through AIB Life.

In December 2010 the Irish government took a majority stake in the bank, which eventually grew to 99.8%. AIB's shares are currently traded on the Irish Stock Exchange and the London Stock Exchange, but its shares were delisted from these exchanges between 2011 and 2017, following its effective nationalisation. The remainder of its publicly traded shares were listed on the Enterprise Securities Market of the Irish Stock Exchange until 23 June 2017.

The Bank of America Corporation (Bank of America; often abbreviated BAC or BofA) is an American multinational investment bank and financial services holding company headquartered at the Bank of America Corporate Center in Charlotte, North Carolina, with investment banking and auxiliary headquarters in Manhattan. The bank was founded by the merger of NationsBank and Bank of America in 1998. It is the second-largest banking institution in the United States and the second-largest bank in the world by market capitalization, both after JPMorgan Chase. Bank of America is one of the Big Four banking institutions of the United States, and one of eight systemically important financial institutions in the United States. It serves about 10 percent of all American bank deposits, in direct competition with JPMorgan Chase, Citigroup, and Wells Fargo. Its primary financial services revolve around commercial banking, wealth management, and investment banking.Through mergers, the oldest branch of the Bank of America franchise dates back to 1784, when Massachusetts Bank was chartered, becoming the first federally chartered joint-stock-owned bank in the United States. Another branch of its history goes back to the American-based Bank of Italy, founded by Amadeo Pietro Giannini in 1904, which provided various banking services to Italian immigrants who faced service discrimination at the time. Headquartered in San Francisco, California, Giannini acquired Banca d'America e d'Italia in 1922 and eventually did business as Bank of America.

In the 1950s, the passage of landmark federal banking legislation facilitated rapid growth, quickly establishing prominent shares for the present bank's predecessors. After suffering significant losses during the 1998 Russian financial crisis, BankAmerica, as it was then known, was acquired by the Charlotte-based NationsBank for $62 billion. Following what was then the largest bank acquisition in history, the Bank of America Corporation was founded. Through a series of mergers and acquisitions, it built upon its commercial banking business by establishing Merrill Lynch for wealth management and Bank of America Merrill Lynch for investment banking in 2008 and 2009, respectively, and since renamed BofA Securities.