Horizon Bancorp, Inc.

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers. Increase in Board of Directors and Filling of Vacancies On and effective August 17, 2026, the Board of Directors (the “Board”) of Horizon Bancorp, Inc. (the “Company”) increased the size of the Board from 11 members to 13 members by increasing the Class of 2027 by two members. The Board elected Nicholas J. Ritter and Charles W. Sulerzyski as directors to the Class of 2027. Each of their initial terms as a director will continue until the 2027 annual meeting of shareholders, or until each of their successors shall be duly elected, unless she or he resigns, is removed, or is otherwise disqualified from serving as a director of the Company. Messrs. Ritter and Sulerzyski were also contemporaneously appointed by the Board of Directors of Horizon Bank, the wholly owned subsidiary of the Company, filling both vacancies on the Board. Nicholas J. Ritter Mr. Ritter, age 49, is the retired Executive Vice President, Chief Information Security Officer of WorldPay, a global payments technology company which was headquartered in Cincinnati, Ohio. He joined WorldPay in 2024 and retired in 2026 after building the information security program post-divestiture from Fidelity National Information Systems (FIS) through its acquisition in 2025 by Global Payments. Prior to joining WorldPay, he was the Senior Vice President, Chief Enterprise Security Officer for First Financial Bank, Cincinnati from 2020 to 2024. Ritter earned his bachelor’s degree in Computer Science from the University of Kentucky, Lexington, Kentucky. Mr. Ritter is assigned to the Enterprise Risk Management Committee and Operations and Cyber Security Committee. Charles W. Sulerzyski Mr. Sulerzyski, age 69, is the retired President and CEO of Peoples Bancorp, Inc., headquartered in Marietta, Ohio. He joined Peoples Bancorp, Inc. in 2011 and retired in 2024 after growing the holding company’s wholly owned subsidiary, People’s Bank, from $1.7 billion to $9.2 billion through acquisitions and organic growth. During his tenure with Peoples Bancorp, Inc., he served on the holding company’s board of directors. Mr. Sulerzyski also served as the President, Great Lakes Region, of KeyBank, N.A. from 2005 to 2010 and as the National Chair of the Community Depository Institutions Advisory Council, in 2024 after serving as the Chair of the Cleveland District from 2021 to 2023. Sulerzyski earned his bachelor’s degree in Economics from New York University and his Master of Business Administration from Fordham University Graduate School of Business, also in New York City. Mr. Sulerzyski is assigned to the Enterprise Risk Management and Wealth Committees. The Board has determined that Messrs. Ritter and Sulerzyski qualify as “independent” directors under the Company’s Corporate Governance guidelines and the independence requirements of the Nasdaq Exchange, as well as the applicable rules promulgated by the Securities and Exchange Commission (the “SEC”). As non-employee directors, Messrs. Ritter and Sulerzyski will receive the same compensation paid to other non-employee directors of the Company in accordance with the policies and procedures previously approved by the Board for non-employee directors, as disclosed in the Company’s most recent definitive proxy statement filed with the SEC on March 20, 2026. There are no arrangements or understandings between either Mr. Ritter or Mr. Sulerzyski and any other person pursuant to which they were selected to serve as a director, nor are there any transactions to which the Company or any of its subsidiaries is a party and in which they have a direct or indirect material interest that would be required to be disclosed pursuant to Item 404(a) of Regulation S-K. Additional information about the appointments of Messrs. Ritter and Sulerzyski to the Horizon Bancorp, Inc. Board of Directors is included in the press release attached as Exhibit 99.1 to this Current Report on Form 8-K. About Horizon Bancorp, Inc. Horizon Bancorp, Inc. (NASDAQ: HBNC) is the $6.6 billion asset (as of June 30, 2026) commercial bank holding company for Horizon Bank, which serves customers across diverse and economically attractive Midwestern markets through convenient digital and virtual tools, as well as its Indiana and Michigan branches. Horizon’s retail offerings include prime residential and other secured consumer lending to in-market customers, as well as a range of personal banking and wealth management solutions. Horizon also provides a comprehensive array of in-market business banking and treasury management services, as well as equipment financing solutions for customers regionally and nationally, with commercial lending representing over half of total loans. More information on Horizon, headquartered in Northwest Indiana’s Michigan City, is available at horizonbank.com and investor.horizonbank.com.