Hannibal National Bank

HANNIBAL, Mo. — John D. Zimmer, president and CEO of HNB Bancorp, Inc. and HNB National Bank, announced Thursday with Elizabeth Fry Matteson, chairman of the board and G. Jackson Jones, president and CEO of Northeast Missouri Bancshares, Inc. and its principal subsidiary, The Mercantile Bank of Louisiana, Mo., that the two institutions have executed…