City union bank is an indian bank. the kumbakonam bank limited, as it was at first called, was incorporated as a limited company on 31 october 1904. the bank initially preferred the role of a regional bank in the thanjavur district tamil nadu. city union bank has now a strong network of 525 computerized branches and 1292 atms which is spread throughout india. in december 2006 larsen & toubro bought 10% of the bank. the bank celebrated its 110th years of service on 31st october 2014.