CIVISTA BANCSHARES, INC. 10-Q

Item 5. Other Information Rule 10b5-1 Trading Plans During the quarter ended September 30, 2025 , none of our directors or officers (as defined in Rule 16a-1(f) under the Exchange Act) adopted or terminated any “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,” as each term is defined in Item 408(a) of Regulation S-K. Page 57 Civista Bancshares, Inc. Other Information Form 10-Q Item 6. E xhibits Exhibit Description Location 2.1 Agreement and Plan of Merger, dated January 10, 2022, by and between Civista Bancshares, Inc. and Comunibanc Corp. Filed as Exhibit 2.1 to Civista Bancshares, Inc.’s Current Report on Form 8-K dated and filed on January 10, 2022 and incorporated herein by reference. (File No. 001-36192) 2.2 Stock Purchase Agreement, dated as of September 29, 2022, by and among Civista Bancshares, Inc., Civista Bank, Vision Financial Group, Inc. and Frederick Summers Filed as Exhibit 2.1 to Civista Bancshares, Inc.’s Current Report on Form 8-K dated September 29, 2022 and filed on September 30, 2022 and incorporated herein by reference. (File No. 001-36192) 2.3 Agreement and Plan of Merger, dated as of July 10, 2025, by and among Civista Bancshares, Inc., Civista Bank and The Farmers Savings Bank. Filed as Exhibit 2.1 to Civista Bancshares, Inc.'s Current Report on Form 8-K dated and filed on July 11, 2025 and incorporated herein by reference. (File No. 001-36192) 3.1 Second Amended and Restated Articles of Incorporation of Civista Bancshares, Inc., as filed with the Ohio Secretary of State on November 15, 2018. Filed as Exhibit 3.1 to Civista Bancshares, Inc.’s Current Report on Form 8-K dated November 15, 2018 and filed on November 16, 2018 and incorporated herein by reference. (File No. 001-36192) 3.2 Second Amended and Restated Code of Regulations of Civista Bancshares, Inc. (adopted July 22, 2025) Filed as Exhibit 3.1 to Civista Bancshares, Inc.’s Current Report on Form 8-K dated July 22, 2025 and filed on July 28, 2025 and incorporated herein by reference. (File No. 001-36192) 31.1 Rule 13a-14(a)/15-d-14(a) Certification of Chief Executive Officer. Included herewith 31.2 Rule 13a-14(a)/15-d-14(a) Certification of Principal Accounting Officer. Included herewith 32.1 Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. Included herewith 32.2 Certification of Principal Accounting Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. Included herewith 101.INS Inline XBRL Instance Document-the instance document does not appear in the Interactive Data File as its XBRL tags are embedded within the Inline XBRL document Included herewith 101.SCH Inline XBRL Taxonomy Extension Schema with Embedded Linkbase Documents Included herewith 104 Cover page formatted in Inline Extensible Business Reporting Language. Included herewith Page 58 Civista Bancshares, Inc. Signatures Form 10-Q Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. Civista Bancshares, Inc. /s/ Dennis G. Shaffer November 5, 2025 Dennis G. Shaffer Date Chief Executive Officer and President /s/ Ian Whinnem November 5, 2025 Ian Whinnem Date Senior Vice President and Chief Financial Officer Page 59