In April, 1965, two other local banks viz., 'The City Forward Bank Limited' and 'The Union Bank Limited' were amalgamated with the Bank under a scheme of amalgamation with the resultant addition of six more branches viz., Kumbakonam-Town, Nannilam, Koradacherry, Tiruvidaimarudur, Tirupanandal and Kuttalam. Consequently, the Bank's name was changed to 'The Kumbakonam City Union Bank Limited'.
In November 1965, the bank's first branch at Madras was opened at Thiyagaraya Nagar. In May, 1969 the Bank secured the services of Shri. O.R. Srinivasan, a former Officer of Reserve Bank of India to be at the helm of affairs as Chairman and Chief Executive Officer which event proved to be a turning point in the annals of the Bank. Under the new Management the Branch Expansion got a fresh impetus and branches were opened at Eravancheri, Sembanarkoil, Tiruchirapalli, Madurai, Thanjavur, Dindigul, Keelapalur, Tirumakkottai, Kottur, Tiruvarur Town and Coimbatore during the period from March, 1968 to August, 1973.
In April, 1974 the bank secured the services of Shri. K.Srinivasan, another former Senior Officer of Reserve Bank of India, as its Secretary. At that time, a Young Chartered Accountant from Thippirajapuram village near Kumbakonam, Shri. V.Narayanan was appointed as Assistant Secretary of the Bank.
During the period 1974-1976 Branches were opened at Periyakulam, Mandaveli (Madras), Pattukkottai, Triplicane (Madras), Cuddalore, Pudukkottai, Chidambaram and Salem.
When Shri. O.R.Srinivasan relinquished his office in June 1977, the then Secretary Shri. K.Srinivasan was appointed as Chairman and Chief Executive Officer of the Bank and the then Asst.Secretary Shri. V.Narayanan was elevated to the rank of the Secretary.
From July,1977 to September,1979 the bank has opened ten more branches including those at George Town (Madras), Mount Road (Madras), Tirunelveli and Karaikudi.