Other Events. On September 3, 2026, pursuant to the previously announced Agreement and Plan of Reorganization, dated as of April 29, 2026 (the “Reorganization Agreement”), by and among Hawthorn Bancshares, Inc., a Missouri corporation (“HBI”), Hawthorn Holdco, Inc., a Missouri corporation and wholly-owned subsidiary of HBI (“Merger Sub”), and FSC Bancshares, Inc., a Missouri corporation (“FBI”), Merger Sub merged with and into FBI, with FBI surviving as a wholly owned subsidiary of HBI (the “…

of this Current Report on Form 8-K, including Exhibit 99.1, is being “furnished” and shall not be deemed “filed” for the purposes of or otherwise subject to liabilities under Section 18 of the Securities Exchange Act of 1934, as amended, and shall not be deemed to be incorporated by reference into the filings of Hawthorn Bancshares, Inc. under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended.

Other Events. On July 29, 2026 , Hawthorn Bancshares, Inc. announced that its Board of Directors approved a quarterly cash dividend of $0.21 per common share. The dividend is payable on October 1, 2026 to shareholders of record at the close of business on September 15, 2026. A copy of the press release relating to such announcement is attached to this report as Exhibit 99.2.

Other Events. As previously announced, on April 29, 2026, Hawthorn Bancshares, Inc., a Missouri corporation (“HBI”), entered into an Agreement and Plan of Reorganization (the “Reorganization Agreement”), by and among HBI, Hawthorn Holdco, Inc., a Missouri corporation and wholly-owned subsidiary of HBI (“Merger Sub”), and FSC Bancshares, Inc., a Missouri corporation (“FBI”), pursuant to which HBI will acquire FBI. As of July 10, 2026, HBI and its wholly owned subsidiary, Hawthorn Bank, have re…

The filing describes a change in compensatory arrangements for non-employee directors.

and Exhibit 99.1 is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, nor shall it be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, unless specifically stated otherwise. Note Regarding Forward-Looking Statements Certain statements in this Form 8-K/A constitute “forward-looking statements” within the meaning of the federal securities laws. These statements are based on…

Director — Grant T. Burcham: Grant T. Burcham was appointed to the board of directors.

Entry into a Material Definitive Agreement. On April 29, 2026, Hawthorn Bancshares, Inc., a Missouri corporation (“HBI”), entered into an Agreement and Plan of Reorganization (the “Reorganization Agreement”), by and among HBI, Hawthorn Holdco, Inc., a Missouri corporation and wholly-owned subsidiary of HBI (“Merger Sub”), and FSC Bancshares, Inc., a Missouri corporation (“FBI”), pursuant to which HBI will acquire FBI. Subject to the terms and conditions set forth in the Reorganization Agreeme…

Other Events. On April 29, 2026, Hawthorn Bancshares, Inc. announced that its Board of Directors approved a quarterly cash dividend of $0.21 per common share. The dividend is payable on July 1, 2026 to shareholders of record at the close of business on June 15, 2026. A copy of the press release relating to such announcement is attached to this report as Exhibit 99.2.

of this Current Report on Form 8-K, including Exhibit 99.1, is being “furnished” and shall not be deemed “filed” for the purposes of or otherwise subject to liabilities under Section 18 of the Securities Exchange Act of 1934, as amended, and shall not be deemed to be incorporated by reference into the filings of Hawthorn Bancshares, Inc. under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended.

of this Current Report on Form 8-K, including Exhibit 99.1, is being “furnished” and shall not be deemed “filed” for the purposes of or otherwise subject to liabilities under Section 18 of the Securities Exchange Act of 1934, as amended, and shall not be deemed to be incorporated by reference into the filings of Hawthorn Bancshares, Inc. under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended.

Other Events. On January 28, 2026, Hawthorn Bancshares, Inc. announced that its Board of Directors approved a quarterly cash dividend of $0.21 per common share, an increase of $0.01 per common share, or 5%, from the previous quarterly dividend. The dividend is payable on April 1, 2026 to shareholders of record at the close of business on March 15, 2026. A copy of the press release relating to such announcement is attached to this report as Exhibit 99.2.

Other Events. On October 29, 2025, Hawthorn Bancshares, Inc. announced that its Board of Directors approved a quarterly cash dividend of $0.20 per common share, payable January 1, 2026 to shareholders of record at the close of business on December 15, 2025. A copy of the press release relating to such announcement is attached to this report as Exhibit 99.2.

of this Current Report on Form 8-K, including Exhibit 99.1, is being “furnished” and shall not be deemed “filed” for the purposes of or otherwise subject to liabilities under Section 18 of the Securities Exchange Act of 1934, as amended, and shall not be deemed to be incorporated by reference into the filings of Hawthorn Bancshares, Inc. under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended.

of this Current Report on Form 8-K, including Exhibit 99.1, is being “furnished” and shall not be deemed “filed” for the purposes of or otherwise subject to liabilities under Section 18 of the Securities Exchange Act of 1934, as amended, and shall not be deemed to be incorporated by reference into the filings of Hawthorn Bancshares, Inc. under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended.

Other Events. On July 30, 2025, Hawthorn Bancshares, Inc. announced that its Board of Directors approved a quarterly cash dividend of $0.20 per common share, payable October 1, 2025 to shareholders of record at the close of business on September 15, 2025. A copy of the press release relating to such announcement is attached to this report as Exhibit 99.2.

Other Events. On June 5, 2025, Hawthorn Bancshares, Inc. announced that its Board of Directors approved a new Common Stock Repurchase Program. A copy of the press release relating to such announcement is attached to this report as Exhibit 99.1 and incorporated by reference herein.

of this Current Report on Form 8-K, including Exhibit 99.1, is being “furnished” and shall not be deemed “filed” for the purposes of or otherwise subject to liabilities under Section 18 of the Securities Exchange Act of 1934, as amended, and shall not be deemed to be incorporated by reference into the filings of Hawthorn Bancshares, Inc. under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended.

Other Events. On April 30, 2025, Hawthorn Bancshares, Inc. announced that its Board of Directors approved a quarterly cash dividend of $0.20 per common share, payable July 1, 2025 to shareholders of record at the close of business on June 15, 2025. A copy of the press release relating to such announcement is attached to this report as Exhibit 99.2.

of this Current Report on Form 8-K, including Exhibit 99.1, is being “furnished” and shall not be deemed “filed” for the purposes of or otherwise subject to liabilities under Section 18 of the Securities Exchange Act of 1934, as amended, and shall not be deemed to be incorporated by reference into the filings of Hawthorn Bancshares, Inc. under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended.

Other Events. On January 22, 2025, Hawthorn Bancshares, Inc. announced that its Board of Directors approved a quarterly cash dividend of $0.19 per common share, payable April 1, 2025 to shareholders of record at the close of business on March 15, 2025. A copy of the press release relating to such announcement is attached to this report as Exhibit 99.2.

of this Current Report on Form 8-K, including Exhibit 99.1, is being “furnished” and shall not be deemed “filed” for the purposes of or otherwise subject to liabilities under Section 18 of the Securities Exchange Act of 1934, as amended, and shall not be deemed to be incorporated by reference into the filings of Hawthorn Bancshares, Inc. under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended.

Other Events. On October 30, 2024, Hawthorn Bancshares, Inc. announced that its Board of Directors approved a quarterly cash dividend of $0.19 per common share, payable January 1, 2025 to shareholders of record at the close of business on December 15, 2024. A copy of the press release relating to such announcement is attached to this report as Exhibit 99.2.

non-voting advisory director — Bob Regnier: Bob Regnier was elected as a non-voting advisory director.

of this Current Report on Form 8-K, including Exhibit 99.1, is being “furnished” and shall not be deemed “filed” for the purposes of or otherwise subject to liabilities under Section 18 of the Securities Exchange Act of 1934, as amended, and shall not be deemed to be incorporated by reference into the filings of Hawthorn Bancshares, Inc. under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended.