MB FINANCIAL, INC. 10,937,500 Shares of Common Stock, par value $0.01 per share Underwriting AgreementLetter Agreement • September 16th, 2009 • Mb Financial Inc /Md • Savings institution, federally chartered • New York
MB Financial, Inc., a Maryland corporation (the “Company”), proposes to issue and sell to the several Underwriters listed in Schedule 1 hereto (the “Underwriters”), for whom you are acting as representative (the “Representative”), an aggregate of 10,937,500 shares of common stock, par value $0.01 per share, of the Company (the “Underwritten Shares”) and, at the option of the Underwriters, up to an additional 1,640,625 shares of common stock of the Company (the “Option Shares”). The Underwritten Shares and the Option Shares are herein referred to as the “Shares”. The shares of common stock of the Company to be outstanding after giving effect to the sale of the Shares are referred to herein as the “Stock”.
