Management Change/Compensation (Form 8-K)

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On March 13, 2026, director Dennis E. Murray, Jr., resigned from the Boards of Directors of Civista Bancshares, Inc. (the "Company") and Civista Bank (the "Bank"). Mr. Murray cited no disagreement with the Company or the Bank in connection with his resignation.

Civista Bancshares, Inc., is a $4.4 billion financial holding company headquartered in Sandusky, Ohio. Its primary subsidiary, Civista Bank, was founded in 1884 and provides full-service banking, commercial lending, mortgage, and wealth management services. Today, Civista Bank operates 44 locations across Ohio, Southeastern Indiana and Northern Kentucky. Civista Bank also offers commercial equipment leasing services for businesses nationwide through its Civista Leasing and Finance Division, Inc., headquartered in Pittsburgh, Pennsylvania. Civista Bancshares' common shares are traded on the NASDAQ Capital Market under the symbol "CIVB". Learn more at www.civb.com.