FIRST BUSINESS FINANCIAL SERVICES, INC. | Business Contracts

Consulting Agreement by and between First Business Financial Services, Inc. and Edward G. Sloane, Jr., effective as of April 1, 2023 (Filed With SEC on April 3, 2023)

Change in Control Agreement by and between First Business Financial Services, Inc. and Brian D. Spielmann, effective as of April 1, 2023 (Filed With SEC on April 3, 2023)

Description of Registrants Securities (Filed With SEC on February 22, 2023)

Form of Amendment to Performance-Based Restricted Stock Unit Agreement, dated as of February 3, 2023 (Filed With SEC on February 7, 2023)

Form of Amendment to Restricted Stock Award Agreement, dated as of February 3, 2023 (Filed With SEC on February 7, 2023)

Second Amended and Restated Agreement by and between First Business Bank, First Business Financial Services, Inc. and Corey Chambas, dated as of February 3, 2023 (Filed With SEC on February 7, 2023)

Amendment to First Business Financial Services 2019 Equity Incentive Plan, effective as of January 27, 2023 (Filed With SEC on February 2, 2023)

Form of Restricted Stock Unit Award Agreement - Board of Directors (Filed With SEC on October 28, 2022)

Form of Restricted Stock Unit Award Agreement - Executive Officer (Filed With SEC on October 28, 2022)

Form of Performance-Based Restricted Stock Unit Award Agreement - Executive Officer (Filed With SEC on October 28, 2022)

Press Release by First Business Financial Services, Inc. dated July 29, 2022 (Filed With SEC on July 29, 2022)

EXHIBIT A FORM OF SUBORDINATED NOTE FIRST BUSINESS FINANCIAL SERVICES, INC. 3.50% FIXED-TO-FLOATING RATE SUBORDINATED NOTE DUE MARCH 15, 2032 (Filed With SEC on March 4, 2022)

Description of Registrants Securities (Filed With SEC on February 23, 2022)

Form of Performance-Based Restricted Stock Unit Award Agreement - Executive Officer (Filed With SEC on October 29, 2021)

Form of Restricted Stock Award Agreement - Executive Officer (Filed With SEC on October 29, 2021)

Form of Restricted Stock Unit Award Agreement - Executive Officer (Filed With SEC on October 29, 2021)

Form of Performance-Based Restricted Stock Unit Award Exchange Agreement - Retiree (Filed With SEC on October 29, 2021)

Form of Restricted Stock Unit Award Exchange Agreement - Retiree (Filed With SEC on October 29, 2021)

Form of Performance-Based Restricted Stock Unit Award Agreement - Retiree (Filed With SEC on October 29, 2021)

Form of Restricted Stock Award Exchange Agreement - Retiree (Filed With SEC on October 29, 2021)

Form of Restricted Stock Award Agreement - Board of Directors (Filed With SEC on October 29, 2021)

Description of Registrants Securities (Filed With SEC on February 24, 2021)

Form of Executive Change-in-Control and Severance Agreement (Filed With SEC on February 24, 2021)

Form of Restricted Stock Agreement - Director (Filed With SEC on April 24, 2020)

Form of Performance-Based Restricted Stock Unit Agreement - Retiree (Filed With SEC on February 27, 2020)

Description of Registrants Securities (Filed With SEC on February 27, 2020)

Form of Performance-Based Restricted Stock Unit Exchange Agreement - Retiree (Filed With SEC on February 27, 2020)

Form of Performance-Based Restricted Stock Unit Agreement (Filed With SEC on February 27, 2020)

Form of 5.50% Fixed-to-Floating Rate Subordinated Note (Filed With SEC on August 15, 2019)

Form of Performance-Based Restricted Stock Unit Agreement (Filed With SEC on July 26, 2019)

Form of Performance-Based Restricted Stock Unit Exchange Agreement - Retiree (Filed With SEC on July 26, 2019)

Form of Restricted Stock Unit Agreement - Retiree (Filed With SEC on July 26, 2019)

Form of Performance-Based Restricted Stock Unit Agreement - Retiree (Filed With SEC on July 26, 2019)

Form of Restricted Stock Agreement (Filed With SEC on July 26, 2019)

Form of Restricted Stock Unit Agreement (Filed With SEC on July 26, 2019)

Form of Restricted Stock Unit Exchange Agreement - Retiree (Filed With SEC on July 26, 2019)

Annual Cash Bonus Plan, effective January 1, 2019 ( in accordance with Item 10(d) of Regulation S-K) (Filed With SEC on February 28, 2019)

FIRST BUSINESS FINANCIAL SERVICES, INC. (Filed With SEC on June 15, 2017)

FIRST BUSINESS FINANCIAL SERVICES, INC. and COMPUTERSHARE TRUST COMPANY, N.A. Rights Agent _________________ RIGHTS AGREEMENT Dated as of June 5, 2008 (Filed With SEC on March 10, 2017)

FIRST AMENDMENT OF AGREEMENT BY AND BETWEEN FIRST BUSINESS BANK AND COREY CHAMBAS (AMENDED AND RESTATED DECEMBER 22, 2014) (Filed With SEC on January 5, 2017)

FIRST BUSINESS FINANCIAL SERVICES, INC. RESTRICTED STOCK AGREEMENT (Filed With SEC on October 28, 2016)

FIRST BUSINESS FINANCIAL SERVICES, INC. RESTRICTED STOCK UNIT AGREEMENT (Filed With SEC on March 11, 2016)

AGREEMENT BY AND BETWEEN FIRST BUSINESS BANK AND COREY CHAMBAS (AMENDED AND RESTATED DECEMBER 22, 2014) Table of Contents (Filed With SEC on March 6, 2015)

Annual Incentive Bonus Program (Filed With SEC on March 6, 2015)

EMPLOYMENT AGREEMENT (Filed With SEC on March 6, 2015)

FORM OF SUBORDINATED NOTE CERTIFICATE FIRST BUSINESS FINANCIAL SERVICES, INC. Fixed-to-Floating Rate Subordinated Note due September 1, 2024 (Filed With SEC on August 26, 2014)

STOCKHOLDER VOTING AGREEMENT (Filed With SEC on May 23, 2014)

Annual Incentive Bonus Program (Filed With SEC on January 29, 2014)

Annual Incentive Bonus Program (Filed With SEC on January 29, 2013)

Form of Underwriting Agreement [ ] Shares FIRST BUSINESS FINANCIAL SERVICES, INC. Common Stock UNDERWRITING AGREEMENT (Filed With SEC on November 26, 2012)

FIRST BUSINESS FINANCIAL SERVICES, INC. 2012 EQUITY INCENTIVE PLAN (Filed With SEC on July 27, 2012)

Form of 7.50% Subordinated Debenture (Filed With SEC on January 31, 2012)

Annual Incentive Bonus Program (Filed With SEC on January 27, 2011)

Capital Purchase Program (CPP). Pursuant to this program, the UST, on behalf of the U.S. government, will purchase preferred stock, along with warrants to purchase common stock,... (Filed With SEC on March 13, 2009)

Annual Incentive Bonus Program (Filed With SEC on March 19, 2008)

Annual Incentive Bonus Plan (Filed With SEC on March 15, 2007)

2006 Incentive Bonus Program (Filed With SEC on March 17, 2006)

FIRST BUSINESS FINANCIAL SERVICES, INC. (58)