Director — Nicholas J. Ritter and Charles W. Sulerzyski: The filing discloses the routine election of two new independent directors to fill vacancies created by an increase in board size.

Results of Operations and Financial Condition On July 22, 2026, Horizon Bancorp, Inc. (the “Company”) issued a press release announcing earnings and other financial results for the three–months ended June 30, 2026. A copy of the press release is furnished as Exhibit 99.1 to this report and incorporated here by reference.

Results of Operations and Financial Condition Horizon Bancorp, Inc. issued a press release announcing that the Company’s financial results for the second quarter of 2026 will be released after the market close on Wednesday, July 22, 2026. Management will also host a conference call to discuss the Company’s financial results for the second quarter of 2026 on Thursday, July 23, 2026 at 7:30 a.m. CT (8:30 a.m. ET). The press release is attached as Exhibit 99.1 to this report.

Other Events Horizon Bancorp, Inc. (“Horizon” or the “Company”) today announced that on June 24, 2026, a jury returned a civil verdict against the Company’s subsidiary, Horizon Bank (the “Bank”), in a lawsuit stemming from 2018 related to a unique circumstance involving the repossession and credit reporting of a single vehicle financed through our legacy indirect auto business. The jury awarded total damages approaching $3.0 million, including $2.5 million of punitive damages. The Company str…

Other Events On June 16, 2026, the Board of Directors of Horizon Bancorp, Inc. approved a dividend of $0.16 per share, payable on July 17, 2026 to stockholders of record on July 3, 2026. 2 SIGNATURES 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 hereunto duly authorized. Date: June 16, 2026 HORIZON BANCORP, INC. By: /s/ John R. Stewart, CFA John R. Stewart, CFA Executive Vice Presid…

Results of Operations and Financial Condition On April 22, 2026, Horizon Bancorp, Inc. (the “Company”) issued a press release announcing earnings and other financial results for the three–months ended March 31, 2026. A copy of the press release is furnished as Exhibit 99.1 to this report and incorporated here by reference.

Results of Operations and Financial Condition Horizon Bancorp, Inc. issued a press release announcing that the Company’s financial results for the first quarter of 2026 will be released after the market close on Wednesday, April 22, 2026. Management will also host a conference call to discuss the Company’s financial results for the first quarter of 2026 on Thursday, April 23, 2026 at 7:30 a.m. CT (8:30 a.m. ET). The press release is attached as Exhibit 99.1 to this report.

Other Events On March 17, 2026, the Board of Directors of Horizon Bancorp, Inc. approved a dividend of $0.16 per share, payable on April 17, 2026, to stockholders of record on April 3, 2026. 2 SIGNATURES 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 hereunto duly authorized. Date: March 18, 2026 HORIZON BANCORP, INC. By: /s/ John R. Stewart, CFA John R. Stewart, CFA Executive Vice P…

Chief Administration Officer — Mark E. Secor: The position of Chief Administration Officer was eliminated, leading to Mr. Secor's departure.

Director — James B. Dworkin and Julie S. Freigang: Two directors are retiring from the Board of Directors.

Results of Operations and Financial Condition On January 21, 2026, Horizon Bancorp, Inc. (the “Company”) issued a press release announcing earnings and other financial results for the three–months ended December 31, 2025. A copy of the press release is furnished as Exhibit 99.1 to this report and incorporated here by reference.

Results of Operations and Financial Condition Horizon Bancorp, Inc. issued a press release announcing that the Company’s financial results for the fourth quarter of 2025 will be released after the market close on Wednesday, January 21, 2026. Management will also host a conference call to discuss the Company’s financial results for the fourth quarter of 2025 on Thursday, January 22, 2026 at 7:30 a.m. CT (8:30 a.m. ET). The press release is attached as Exhibit 99.1 to this report.

Other Events On December 16, 2025, the Board of Directors of Horizon Bancorp, Inc. approved a dividend of $0.16 per share, payable on January 16, 2026 to stockholders of record on January 2, 2026. 2 SIGNATURES 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 hereunto duly authorized. Date: December 16, 2025 HORIZON BANCORP, INC. By: /s/ John R. Stewart, CFA John R. Stewart, CFA Executi…

Results of Operations and Financial Condition On October 22, 2025, Horizon Bancorp, Inc. (the “Company”) issued a press release announcing earnings and other financial results for the three–months ended September 30, 2025. A copy of the press release is furnished as Exhibit 99.1 to this report and incorporated here by reference.

Director — Larry S. Magnesen: Larry S. Magnesen was appointed as a new director and to several committees.

Results of Operations and Financial Condition Horizon Bancorp, Inc. issued a press release announcing that the Company’s financial results for the third quarter of 2025 will be released after the market close on Wednesday, October 22, 2025. Management will also host a conference call to discuss the Company’s financial results for the third quarter of 2025 on Thursday, October 23, 2025 at 7:30 a.m. CT (8:30 a.m. ET). The press release is attached as Exhibit 99.1 to this report.

Other Events On September 16, 2025, the Board of Directors of Horizon Bancorp, Inc. approved a dividend of $0.16 per share, payable on October 17, 2025 to stockholders of record on October 3, 2025. 2 SIGNATURES 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 hereunto duly authorized. Date: September 17, 2025 HORIZON BANCORP, INC. By: /s/ John R. Stewart, CFA John R. Stewart, CFA Execu…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information set forth under

and Exhibit 99.1 shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “ Exchange Act ”), or otherwise subject to the liabilities of such section, nor will such information be deemed incorporated by reference in any filing under the Securities Act or the Exchange Act, except as may be expressly set forth by specific reference in such filing. Cautionary Note Regarding Forward-Looking Statements This Report includes “forward-loo…

Entry into Material Definitive Agreement. On August 29, 2025, Horizon Bancorp, Inc. (the “ Company ”) entered into a Subordinated Note Purchase Agreement (the “ Note Purchase Agreement ”) pursuant to which the Company issued and sold $100.0 million in aggregate principal amount of its 7.00% Fixed-to-Floating Rate Subordinated Notes due September 15, 2035 (the “ Notes ”). The Notes were issued by the Company at a price equal to 100% of their face amount. The Company intends to use the net proc…

Results of Operations and Financial Condition On July 23, 2025, Horizon Bancorp, Inc. (the “Company”) issued a press release announcing earnings and other financial results for the three–months ended June 30, 2025. A copy of the press release is furnished as Exhibit 99.1 to this report and incorporated here by reference.

Results of Operations and Financial Condition Horizon Bancorp, Inc. issued a press release announcing that the Company’s financial results for the second quarter of 2025 will be released after the market close on Wednesday, July 23, 2025. Management will also host a conference call to discuss the Company’s financial results for the second quarter of 2025 on Thursday, July 24, 2025 at 7:30 a.m. CT (8:30 a.m. ET). The press release is attached as Exhibit 99.1 to this report.

Other Events On June 17, 2025, the Board of Directors of Horizon Bancorp, Inc. approved a dividend of $0.16 per share, payable on July 18, 2025 to stockholders of record on July 3, 2025. 2 SIGNATURES 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 hereunto duly authorized. Date: June 18, 2025 HORIZON BANCORP, INC. By: /s/ John R. Stewart, CFA John R. Stewart, CFA Executive Vice Presid…

Director — Michele A. Samuels, Brian C. Walker: The Board of Directors increased its size and elected two new directors.

Results of Operations and Financial Condition On April 23, 2025, Horizon Bancorp, Inc. (the “Company”) issued a press release announcing earnings and other financial results for the three–months ended March 31, 2025. A copy of the press release is furnished as Exhibit 99.1 to this report and incorporated here by reference.