Grand Rapids Business Journal 1 of 4 Courtesy Old National Bancorp Courtesy First Midwest Bancorp A bank with West Michigan locations is merging with First Midwest Bancorp to create a new entity with $45 billion in combined assets. Evansville, Indiana-based Old National Bancorp (Nasdaq: ONB) and Chicago-based First Midwest Bancorp (Nasdaq: FMBI), said on Tuesday that they entered into a definitive merger agreement to combine in an all-stock merger of equals transaction with a total market value of $6.5 billion to create a premier Midwestern bank with $45 billion in combined assets. The transa...