Richmond Mutual Bancorporation, Inc.

proxy statement of the Company and Farmers and a prospectus of the Company, as well as in other filings the Company makes with the Securities and Exchange Commission ("SEC").

The inclusion of the Merger Agreement as an exhibit is intended to provide investors with information regarding its terms. It is not intended to provide any other factual information about the Company, Farmers, or their respective subsidiaries or affiliates. The representations, warranties, and covenants in the Merger Agreement were made only as of specific dates, solely for the benefit of the parties, and may be subject to limitations, materiality standards, or confidential disclosures agreed to by the parties. Investors should not rely on these provisions as characterizations of the actual condition of the Company, Farmers, or any of their subsidiaries or affiliates. Information concerning the subject matter of the representations and warranties may change after the date of the Merger Agreement, and such subsequent information may or may not be reflected in the Company’s public disclosures.

On November 12, 2025, the Company and Farmers issued a joint press release announcing the execution of the Merger Agreement. A copy of the press release is attached as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference. In addition, the Company has prepared an investor presentation regarding the transactions contemplated by the Merger Agreement, which is expected to be used in connection with presentations to analysts and investors. The presentation is attached to this as Exhibit 99.2 to this Current Report on Form 8-K and is incorporated herein by reference.

The information in this Current Report on Form 8-K is furnished pursuant to Item 7.01 and shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). It may only be incorporated by reference in another filing under the Exchange Act or the Securities Act of 1933, as amended, if such subsequent filing specifically references the information furnished pursuant to Item 7.01 of this Current Report on Form 8-K.

Note Regarding Forward-Looking Statements.

This report may contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, including statements relating to the expected timing and benefits of the proposed merger between RMBI and Farmers, future financial and operating results, business strategy, and other statements that are not historical facts. Words such as “anticipates,” “believes,” “estimates,” “expects,” “intends,” “plans,” “projects,” “may,” “should,” “will,” and similar expressions are intended to identify these forward-looking statements.

Actual results could differ materially due to risks, uncertainties, and other factors, including, among others:

Forward-looking statements speak only as of the date of this release. Neither RMBI nor Farmers undertakes any obligation to update or revise any forward-looking statements, whether as a result of new information, future events, or otherwise, except as required by law.

Additional information regarding the risks and uncertainties that could affect future results of RMBI and Farmers can be found in RMBI’s Annual Report on Form 10-K for the fiscal year ended December 31, 2024, its Quarterly Reports on Form 10-Q for the periods ended March 31, June 30, and September 30, 2025, and other filings with the SEC, available free of charge on the SEC’s website atwww.sec.gov.

Annualized, pro forma, projected, and estimated numbers in this document are used for illustrative purposes only, are not forecasts and may not reflect actual results.

Additional Information About the Merger and Where to Find It

This report does not constitute an offer to sell or the solicitation of an offer to buy or exchange any securities or a solicitation of any vote or approval with respect to the proposed transaction.

In connection with the proposed transaction, a registration statement on Form S-4 will be filed with the SEC that will include a joint proxy statement of RMBI and Farmers and a prospectus of RMBI, which will be distributed to the shareholders of RMBI and Farmers in connection with their votes on the merger of Farmers with and into RMBI and the issuance of RMBI common stock in the proposed transaction. INVESTORS AND SECURITY HOLDERS ARE ENCOURAGED TO READ THE REGISTRATION STATEMENT AND JOINT PROXY STATEMENT/PROSPECTUS WHEN THEY BECOME AVAILABLE (AND ANY OTHER DOCUMENTS FILED WITH THE SEC IN CONNECTION WITH THE PROPOSED TRANSACTION OR INCORPORATED BY REFERENCE INTO THE JOINT PROXY STATEMENT/PROSPECTUS) BECAUSE SUCH DOCUMENTS WILL CONTAIN IMPORTANT INFORMATION REGARDING THE PROPOSED MERGER AND RELATED MATTERS.

Investors and security holders will be able to obtain free copies of the registration statement on Form S-4 and the related proxy statement/prospectus, when filed, as well as other documents filed with the SEC by RMBI through the web site maintained by the SEC at www.sec.gov. These documents, when available, also can be obtained free of charge by accessing RMBI’s website at www.firstbankrichmond.com under the tab “Investor Relations” and then under “SEC Filings.” Alternatively, these documents, when filed with the SEC by RMBI, can be obtained free of charge by (1) writing RMBI at 31 North 9th Street, Richmond, Indiana 47374, Attn: Bradley Glover or by calling (765) 962-2581; or (2) writing Farmers at 9 East Clinton Street, Frankfort, Indiana 46041, Frankfort, Indiana, 17748, Attn: Chad Kozuch, or by calling (765) 654-8731.

Participants in the Solicitation

The directors, executive officers and certain other members of management and employees of RMBI may be deemed to be participants in the solicitation of proxies from the shareholders of RMBI in connection with the proposed transaction. Information about RMBI’s directors and executive officers is included in the proxy statement for its 2025