Tamilnad Mercantile Bank (TMB) is an Indian bank headquartered in Thoothukudi, Tamil Nadu, with a history dating back to 1921 when it was established as Nadar Bank Limited. It adopted its current name in 1962. TMB primarily focuses on serving customers in southern India, particularly Tamil Nadu, catering to individuals, SMEs, and corporate clients with a comprehensive suite of banking and financial services, including deposits, loans, and foreign exchange. The bank has expanded its reach through a network of branches and ATMs across India and has modernized its technology.