Results of Operations and Financial Condition On July 28, 2026, Seacoast Banking Corporation of Florida ("Seacoast or the "Company") announced its financial results for the three- and six-month periods ended June 30, 2026. A copy of the Company's press release is attached hereto as Exhibit 99.1 and incorporated herein by reference.

Director — H. Gilbert Culbreth, Jr.: Mr. Culbreth resigned from the Board of Directors for personal reasons.

Results of Operations and Financial Condition On April 28, 2026, Seacoast Banking Corporation of Florida ("Seacoast or the "Company") announced its financial results for the quarter ended March 31, 2026. A copy of the press release announcing Seacoast’s results for the quarter ended March 31, 2026, is attached hereto as Exhibit 99.1 and incorporated herein by reference.

Director — Michael E. Griffin, Kathleen B. Kay, Randolph A. Moore, III: The company expanded its board of directors by appointing three new directors.

Results of Operations and Financial Condition On January 29, 2026, Seacoast Banking Corporation of Florida ("Seacoast or the "Company") announced its financial results for the quarter and year ended December 31, 2025. A copy of the press release announcing Seacoast’s results for the quarter and year ended December 31, 2025, is attached hereto as Exhibit 99.1 and incorporated herein by reference.

Other Events On December 19, 2025, the Board of Directors (the “ Board ”) of Seacoast Banking Corporation of Florida (the “ Company ”) authorized the renewal of the Share Repurchase Program (the “ Share Repurchase Program ”), which was set to expire on December 31, 2025, increasing the amount that the Company may, from time to time, purchase to $150 million of its shares of outstanding common stock. The shares may be repurchased in the open market, by block purchase, or in privately negotiate…

Results of Operations and Financial Condition On October 27, 2025, Seacoast Banking Corporation of Florida ("Seacoast or the "Company") announced its financial results for the quarter ended September 30, 2025. A copy of the press release announcing Seacoast’s results for the quarter ended September 30, 2025, is attached hereto as Exhibit 99.1 and incorporated herein by reference.

Completion of Acquisition or Disposition of Assets. Effective October 1, 2025, Seacoast Banking Corporation of Florida (“Seacoast” or the “Company”), and Seacoast's wholly-owned subsidiary Seacoast National Bank, completed the previously announced merger (the "Merger") with Villages Bancorporation, Inc. (“VBI”), parent company of Citizens First Bank. At the effective time of the Merger, (the "Effective Time"), VBI merged with and into Seacoast, and Citizens First Bank merged with and into Sea…

Material Modification to Rights of Security Holders. The information set forth in

Results of Operations and Financial Condition On July 24, 2025, Seacoast Banking Corporation of Florida ("Seacoast or the "Company") announced its financial results for the quarter ended June 30, 2025. A copy of the press release announcing Seacoast’s results for the quarter ended June 30, 2025, is attached hereto as Exhibit 99.1 and incorporated herein by reference.

Completion of Acquisition or Disposition of Assets. Effective July 11, 2025, Seacoast Banking Corporation of Florida (“Seacoast” or the “Company”), the holding company for Seacoast National Bank (“Seacoast Bank”), announced today the completion of its acquisition of Heartland Bancshares, Inc. (“Heartland”), parent company of Heartland National Bank, effective July 11, 2025. The merger of Heartland National Bank with and into Seacoast Bank was also effective on the same date, with Seacoast Nat…

Entry into a Material Definitive Agreement On May 29, 2025, Seacoast Banking Corporation of Florida, a Florida corporation (“Seacoast” or the “Company”), and Seacoast National Bank, a national banking association (“SNB”), entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Villages Bancorporation, Inc., a Florida corporation (“VBI”), and Citizens First Bank, a Florida state chartered bank and wholly-owned subsidiary of VBI (“Citizens First Bank”). The Merger Agreement p…

Results of Operations and Financial Condition On April 24, 2025, Seacoast Banking Corporation of Florida ("Seacoast or the "Company") announced its financial results for the quarter ended March 31, 2025. A copy of the press release announcing Seacoast’s results for the quarter ended March 31, 2025, is attached hereto as Exhibit 99.1 and incorporated herein by reference.

Entry into a Material Definitive Agreement On February 27, 2025, Seacoast Banking Corporation of Florida, a Florida corporation (“Seacoast”), and Seacoast National Bank, a national banking association (“SNB”), entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Heartland Bancshares, Inc., a Florida corporation (“Heartland”), and Heartland National Bank, a national banking association and wholly-owned subsidiary of Heartland (“Heartland Bank”). The Merger Agreement provi…

Results of Operations and Financial Condition On January 27, 2025, Seacoast Banking Corporation of Florida ("Seacoast or the "Company") announced its financial results for the quarter and year ended December 31, 2024. A copy of the press release announcing Seacoast’s results for the quarter and year ended December 31, 2024, is attached hereto as Exhibit 99.1 and incorporated herein by reference.

Other Events On December 18, 2024, the Board of Directors (the “ Board ”) of Seacoast Banking Corporation of Florida (the “ Company ”) authorized the renewal of the Share Repurchase Program (the “ Share Repurchase Program ”), which was set to expire on December 31, 2024, pursuant to which the Company may, from time to time, purchase up to $100 million of its shares of outstanding common stock. The shares may be repurchased in the open market, by block purchase, or in privately negotiated tran…

Results of Operations and Financial Condition On October 24, 2024 , Seacoast Banking Corporation of Florida ("Seacoast or the "Company") announced its financial results for the quarter ended September 30, 2024. A copy of the press release announcing Seacoast’s results for the quarter ended September 30, 2024, is attached hereto as Exhibit 99.1 and incorporated herein by reference.

Results of Operations and Financial Condition On July 25, 2024, Seacoast Banking Corporation of Florida (“Seacoast” or the “Company”) announced its financial results for the quarter ended June 30, 2024. A copy of the press release announcing Seacoast’s results for the quarter ended June 30, 2024, is attached hereto as Exhibit 99.1 and incorporated herein by reference.

Director — Eduardo “Eddy” J. Arriola: The filing discloses the appointment of a new director to an expanded board, which is a routine governance action rather than a departure of a senior executive.

Results of Operations and Financial Condition On April 25, 2024, Seacoast Banking Corporation of Florida (“Seacoast” or the “Company”) announced its financial results for the quarter ended March 31, 2024. A copy of the press release announcing Seacoast’s results for the quarter ended March 31, 2024, is attached hereto as Exhibit 99.1 and incorporated herein by reference.