The six largest American banks and thrifts maintained their rankings on SNL Financial’s most recent ranking of the 50 largest banks and thrifts by assets.

Boston-based State Street Corp. inched up one ranking to the No. 10 position on the list. Santander dropped one spot to No. 28. Bridgeport, Conn.-based People’s United Financial slipped one spot to No. 41.

SNL ranks the largest banks and thrifts operating in the U.S. with a deposits-to-assets ratio of at least 25 percent for each relevant quarter. Some of the financial institutions that are regulated as bank holding companies did not meet the criteria and thus were excluded from the analysis. Examples include Goldman Sachs Group Inc., Morgan Stanley and American International Group Inc.

In addition, industrial banks were also not considered for this analysis. One of the significant exclusions from the list is UBS Bank USA, which reported $45.60 billion in assets as of Dec. 31, 2013.