Half of the 50 largest U.S. banks and thrifts reported an increase in assets during the third quarter.

JPMorgan Chase & Co., the largest U.S. bank by assets, added $32.46 billion in assets during the third quarter, the most among the "big four" megabanks. Meanwhile, assets at Wells Fargo & Co. fell $46.55 billion, the largest nominal decrease among the top 50 banks.

First Citizens BancShares Inc. joined the top 50 list at No. 36 after announcing a merger of equals with CIT Group Inc. on Oct. 16. First Citizens' assets and deposits were adjusted upwards by $60.87 billion and $44.71 billion, respectively. Once the deal closes, expected in the second quarter of 2021, the combined entity will be headquartered in Raleigh, N.C., and operate under the First Citizens banner.

On Nov. 16, PNC Financial Services Group Inc. agreed to acquire BBVA USA Bancshares Inc., a unit of Banco Bilbao Vizcaya Argentaria SA, pushing its pro forma assets and deposits up by $103.65 billion and $86.37 billion, respectively. The deal, expected to close in mid-2021, would make PNC Financial the seventh-largest bank by assets in the U.S.

Among recently completed deals, Charles Schwab Corp. closed its acquisition of TD Ameritrade Holding Corp. on Oct. 6. The company sits at No. 11 on the list with $475.82 billion in assets and $320.72 billion in deposits.

To view an Excel spreadsheet containing the top 50 U.S. banks and thrifts in the third quarter, click here.