X0306 4 2015-12-31 0001139812 MB FINANCIAL INC /MD MBFI 0001243634 GRIES CHARLES J C/O MB FINANCIAL, INC. 6111 NORTH RIVER ROAD ROSEMONT IL 60018 1 Common Stock 2015-12-31 4 A 0 1243 32.37 A 43383 I By Deferred Comp Plan Common Stock 7595 D Common Stock 4557 I Charles J. Gries Profit Sharing and Cash Deferred Plan Common Stock 1584 I Living Trust Common Stock 1050 I Pension Plan Common Stock 2200 I By Spouse's IRA Director Stock Units 0 Common Stock 7075 7075 D Received in the Merger in exchange for director stock units (representing deferred director fees) ('DSUs") for 6,055 shares of FOBB common stock. Amount reflects additional Director Stock Units credited to the Reporting Person based on the cash dividend paid to all stockholders of the Issuer subsequent to the last Form 4 filed by the Reporting Person. /s/ Doria L. Koros, attorney-in-fact for Mr. Gries 2016-01-05