Form of Underwriting Agreement [ ] Shares FIRST BUSINESS FINANCIAL SERVICES, INC. Common Stock UNDERWRITING AGREEMENTUnderwriting Agreement • November 26th, 2012 • First Business Financial Services, Inc. • State commercial banks • New York
First Business Financial Services, Inc., a Wisconsin corporation (the “Company”), proposes to issue and sell to the several underwriters named in Schedule I hereto (the “Underwriters”) for whom you are acting as representative (the “Representative”) an aggregate of shares (the “Firm Shares”) of the common stock, par value $0.01 per share, of the Company (“Common Stock”). The Company also proposes to sell to the several Underwriters, for the sole purpose of covering over-allotments in connection with the sale of the Firm Shares, at the option of the Underwriters, up to an additional shares of Common Stock (the “Option Shares”). The Firm Shares and the Option Shares are hereinafter referred to collectively as the “Shares”.
