Simmons First National Corporation Human Resources Contracts & Agreements

Separation Agreement and Release among Simmons First National Corporation, Simmons Bank, and Matthew Reddin dated July 26, 2023 (Filed With SEC on July 28, 2023)

Form of Associate Performance Share Unit Award Certificate and Terms and Conditions (2015 Plan - 2023) (Filed With SEC on May 5, 2023)

Executive Change in Control Severance Agreement for Ann Madea dated November 12, 2021 (Filed With SEC on May 5, 2023)

First Amended and Restated Executive Change in Control Agreement for Chad Rawls dated November 8, 2022 (Filed With SEC on May 5, 2023)

Executive Change in Control Agreement for Brad Yaney dated November 4, 2022 (Filed With SEC on May 5, 2023)

Simmons First National Corporation 2023 Stock and Incentive Plan (effective April 18, 2023) (Filed With SEC on April 19, 2023)

Simmons First National Corporation Directors Deferred Compensation Plan (Amended and Restated Effective December 31, 2022) (Filed With SEC on February 27, 2023)

Second Amendment to Deferred Compensation Agreement for George A. Makris, Jr., dated January 25, 2023 (Filed With SEC on January 25, 2023)

First Amendment to Deferred Compensation Agreement for Jennifer Compton dated July 27, 2022 (Filed With SEC on November 4, 2022)

First Amendment to Deferred Compensation Agreement for George Makris, III dated July 27, 2022 (Filed With SEC on November 4, 2022)

First Amendment to Deferred Compensation Agreement for Matthew Reddin dated August 4, 2022 (Filed With SEC on November 4, 2022)

Deferred Compensation Agreement for George A. Makris III dated March 11, 2022 (Filed With SEC on May 6, 2022)

Form of Associate Performance Share Unit Award Certificate and Terms and Conditions (2022) (Filed With SEC on May 6, 2022)

Form of Associate Performance Share Unit Award Certificate and Terms and Conditions (2021) (Filed With SEC on February 25, 2022)

Executive Change in Control Severance Agreement for James M. Brogdon dated July 30, 2021 (Filed With SEC on August 5, 2021)

Deferred Compensation Agreement for James M. Brogdon dated July 30, 2021 (Filed With SEC on August 5, 2021)

First Amended and Restated Executive Change in Control Severance Agreement for Matthew S. Reddin dated March 26, 2021 (Filed With SEC on May 6, 2021)

First Amended and Restated Executive Change in Control Severance Agreement for Jennifer B. Compton dated March 26, 2021 (Filed With SEC on May 6, 2021)

First Amended and Restated Executive Change in Control Severance Agreement for George A. Makris III dated March 26, 2021 (Filed With SEC on May 6, 2021)

First Amended and Restated Executive Change in Control Severance Agreement for David Garner dated March 26, 2021 (Filed With SEC on May 6, 2021)

First Amended and Restated Executive Change in Control Severance Agreement for Paul Kanneman dated March 26, 2021 (Filed With SEC on May 6, 2021)

First Amended and Restated Executive Change in Control Severance Agreement for John Barber dated March 26, 2021 (Filed With SEC on May 6, 2021)

First Amended and Restated Executive Change in Control Severance Agreement for George A. Makris, Jr. dated March 26, 2021 (Filed With SEC on April 1, 2021)

First Amended and Restated Executive Change in Control Severance Agreement for Stephen C. Massanelli dated March 26, 2021 (Filed With SEC on April 1, 2021)

Form of Associate Performance Share Unit Award Certificate and Terms and Conditions (Filed With SEC on February 25, 2021)

First Amendment to Amended and Restated Executive Severance Agreement for Robert A. Fehlman dated March, 1, 2006 (Filed With SEC on February 25, 2021)

Second Amendment to Amended and Restated Executive Severance Agreement for Robert A. Fehlman dated March 1, 2006 (Filed With SEC on February 25, 2021)

Executive Severance Agreement for Matthew Reddin dated October 25, 2019 (Filed With SEC on February 25, 2021)

Deferred Compensation Agreement for Matthew Reddin dated March 7, 2017 (Filed With SEC on February 25, 2021)

Executive Severance Agreement for George Makris III dated July 28, 2020 (Filed With SEC on November 6, 2020)

Executive Severance Agreement for John Barber dated July 24, 2020 (Filed With SEC on November 6, 2020)

Deferred Compensation Agreement for David W. Garner dated January 2, 2020 (Filed With SEC on May 7, 2020)

Second Amended and Restated Simmons First National Corporation 2015 Incentive Plan, to be effective as of July 1, 2020 (Filed With SEC on April 7, 2020)

Second Amended and Restated Simmons First National Corporation 2015 Incentive Plan, to be effective as of July 1, 2020 (Filed With SEC on April 2, 2020)

Deferred Compensation Agreement for Jena Compton dated February 28, 2017 (Filed With SEC on February 27, 2020)

Executive Severance Agreement for Jena Compton dated February 5, 2016 (Filed With SEC on February 27, 2020)

Executive Severance Agreement for Paul Kanneman dated January 2, 2017 (Filed With SEC on February 27, 2020)

Amended Executive Severance Agreement for David Garner dated April 30, 2014 (Filed With SEC on February 27, 2020)

Executive Severance Agreement for Patrick Burrow dated December 29, 2014 (Filed With SEC on February 27, 2020)

Deferred Compensation Agreement for Marty D. Casteel dated January 22, 2018 (Filed With SEC on February 28, 2018)