MB Financial completed its merger with American Chartered Bancorp, and its wholly owned bank subsidiary, American Chartered Bank, has been merged into MB Financial Bank.

The American Chartered merger adds 15 Chicago-area offices, $2.77 billion in assets and $2.36 billion in deposits to MB Financial’s commercial banking business. American Chartered specialized in serving privately owned, small and mid-sized businesses.

“The completion of this transaction results in a notable expansion of MB’s commercial banking business and core deposit franchise. Just as importantly, the acquisition is aligned with MB Financial’s deep commitment to exceptional service through bankers who are dedicated to their clients’ success,” said Mitchell Feiger, president and CEO of MB Financial. “I’m pleased to welcome American Chartered clients and staff to MB Financial Bank. I’m confident the combined organization will bring even stronger value to our clients and communities.”