The Boston-based State Street Corp. and Santander Holdings USA ranked among SNL Financial’s Top 50 U.S. banks and thrifts by assets in the second quarter this year.

State Street and Santander Holdings were ranked at 11 and 27, respectively, with State Street maintaining its ranking from the first quarter and Santander Holdings dropping only one spot on the list.

JPMorgan Chase, Bank of America, Citigroup and Wells Fargo remain the four largest banks in the U.S., according to SNL’s list. CIT Group, based in New York, is now the 35th largest bank, according to the rankings.

SNL ranked the largest banks and thrifts operating in the U.S. with a deposit-to-asset ratio of at least 25 percent. Some large firms regulated as bank holding companies, such as Goldman Sachs Group, General Electric Capital and Morgan Stanley, do not meet the threshold, so they are not included in the rankings.