The Financial Services Roundtable has released its list of the four largest financial backers in the country.
The ranking comes as both President Donald Trump and his administration have stepped up their attacks on Wall Street.
The White House and the Democratic Congress have sought to restrict the ability of banks to engage in risky financial activity.
Trump has called the banks “too big to fail” and has ordered regulators to freeze their assets.
The president has also criticized banks for failing to properly investigate and prosecute crimes against their clients.
The top financial backer of the Republican Party is JPMorgan Chase & Co., the largest bank in the United States.
The bank was the largest lender to the Trump administration in the last election cycle.
It has received $13.7 billion in taxpayer subsidies during the past year, according to a recent report.
The next biggest financial supporter of the Democrats is Citigroup Inc., which received $2.6 billion in government subsidies during this period.
Citigroup has been a major beneficiary of the bailout.
During the first six months of 2018, Citigroup received more than $10 billion in tax credits and subsidies from the U.S. government.
JPMorgan and Bank of America, both of which are part of the Big Three banks, were the third and fourth biggest financial supporters of Democrats in the 2018 midterm elections.
A report from the nonpartisan Tax Policy Center estimated that between 2010 and 2018, the Big Banks received $12.4 trillion in tax subsidies and loans.
“It is clear that the banks have benefited from their taxpayer-funded support and that they have done so even as they have become more aggressive in their attempts to protect their own profits,” the Tax Policy Alliance said in a statement.