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. History To allow it to acquire other banks and other financial related businesses, Indiana National Bank formed a holding company called Indiana National Corporation in 1969. Expansion outside of Marion County Until July 1, 1985, the state of Indiana did not permit bank branching across county lines nor bank ownership outside the bank holding company's home county. After that date, Indiana allowed very limited branching but allowed the purchase of banks by holding companies anywhere in the state as long as total deposits that were controlled by the holding company did not exceed a ceiling that was initially set at 11 percent of all deposits held in Indiana banks. Indiana National Corporation made its first expansion move outside of Marion County by announcing in May 1985, two months before the new cross-county bank laws went into effect, the pending acquisitions of the Lafayette-based Lafayette National Bank, Delphi-based Union Bank & Trust Co., and Carmel-based Fidelity Bank of Indiana. The acquisition of Lafayette National Bank was completed in November 1985 for $29.8 million while the acquisition of Fidelity Bank was completed in December for $11.5 million and the acquisition of Union Bank was completed in December for $12.9 million. In June 1985, Indiana National Corporation announced the pending acquisition of the Lowell-based Lowell National Bancorp with its Lowell National Bank subsidiary for $15.2 million. The acquisition was completed in November 1985 for $14.8 million. In November 1985, Indiana National Corporation announced the acquisition of the deposits and the four branch offices of the failed Leo-based Allen County Bank & Trust Company from the Federal Deposit Insurance Corporation for $2 million. After the acquisition, Indiana National Bank had 45 branch offices in Marion County and 4 in Allen County.