INB meaning in Business ?

INB Financial Corporation was an Indianapolis-based statewide bank holding company that was the largest Indiana-based financial institution at the time it was acquired by Michigan-based NBD Bancorp in 1992. Its primary subsidiary was the Indianapolis-based INB National Bank, formerly the Indiana National Bank, which can trace its origins to the founding of the Second State Bank of Indiana in 1834.

From the mid-1950s through the late 1980s, Indiana National Bank, American Fletcher National Bank, and Merchants National Bank, were the three largest banks in Indianapolis and its holding company, Indiana National (INB Financial) Corporation, along with American Fletcher Corporation and Merchants National Corporation, were the three largest bank holding companies in the state.