SBI

State Bank of India (SBI) traces its ancestry to British India, through the Imperial Bank of India, to the founding, in 1806, of the Bank of Calcutta, making it the oldest commercial bank in the Indian Subcontinent.

Bank of Madras merged into the other two “presidency banks” in British India, Bank of Calcutta and Bank of Bombay, to form the Imperial Bank of India, which in turn became the State Bank of India.

Government of India owned the Imperial Bank of India in 1955, with Reserve Bank of India (India’s Central Bank) taking a 60% stake, and renamed it the State Bank of India.

In 2008, the government took over the stake held by the Reserve Bank of India.

source: https://en.wikipedia.org/wiki/State_Bank_of_India