Old Second, the bank holding company for Old Second National Bank, which operates 29 banking offices across seven counties in northern Illinois, agreed to acquire West Suburban, the bank holding company for West Suburban Bank, which maintains 43 banking locations across DuPage, Kane, Kendall, and Will counties in Illinois, for $297m. "West Suburban has served its customers and communities for nearly 60 years. I could not be more proud of our team, the bank we built together and the positive impact we've made in the western suburbs of Chicago. Much like West Suburban, Old Second has a long history of supporting its communities and for over 150 years has helped individuals and businesses in Chicago and the western suburbs through a relationship-banking model. We expect that the community bank culture and values that we share with Old Second, and the expanded products and capabilities that we will have following our merger will enhance our ability to provide exceptional banking services to all of our customers. We truly believe this combination will bring out the best in both of our companies and create a better bank for our employees as well as the customers and communities we serve," Kevin Acker, West Suburban Chairman. On October 15, 2021; Old Second Bancorp announced the reciept of regulatory approvals to complete its merger with West Suburban.