Byline Bancorp to acquire Illinois State Bancorp

Byline Bancorp executed an Agreement and Plan of Merger to acquire Illinois State Bancorp and its two bank subsidiaries (First Nations Bank and The Bank of Bourbonnais). The filing announces a completed acquisition agreement, which is a material M&A event that typically affects the acquirer's stock price, though the 8-K text does not disclose deal terms (price, payment method, or relative size).

Byline Bancorp agreed to buy Illinois State Bancorp, which owns two Illinois banks. This is a significant business combination that will change Byline's size and scope.