SEACOAST BANKING CORP OF FLORIDA

All schedules normally required by Form 10-K are omitted, since either they are not applicable or the required information is shown in the financial statements or the notes thereto.

PLEASE NOTE: It is inappropriate for readers to assume the accuracy of, or rely upon any covenants, representations or warranties that may be contained in agreements or other documents filed as Exhibits to, or incorporated by reference in, this report. Any such covenants, representations or warranties may have been qualified or superseded by disclosures contained in separate schedules or exhibits not filed with or incorporated by reference in this report, may reflect the parties’ negotiated risk allocation in the particular transaction, may be qualified by materiality standards that differ from those applicable for securities law purposes, may not be true as of the date of this report or any other date, and may be subject to waivers by any or all of the parties. Where exhibits and schedules to agreements filed or incorporated by reference as Exhibits hereto are not included in these Exhibits, such exhibits and schedules to agreements are not included or incorporated by reference herein.

The following Exhibits are attached hereto or incorporated by reference herein (unless indicated otherwise, all documents referenced below were filed pursuant to the Exchange Act by Seacoast Banking Corporation of Florida, Commission File No. 0-13660):

Exhibit 2.1. Agreement and Plan of Merger dated February 27, 2025 by and among the Company, Seacoast National Bank, Heartland Bancshares, Inc. and Heartland National Bank incorporated herein by reference from Exhibit 2.1 to the Company’s Form 8-K, filed March 5, 2025.

Exhibit 2.2. Agreement and Plan of Merger dated May 29, 2025 by and among the Company, Seacoast National Bank, Villages Bancorporation, Inc. and Citizens First Bank incorporated herein by reference from Exhibit 2.1 to the Company’s Form 8-K, filed May 29, 2025.

Exhibit 3.1.1 Amended and Restated Articles of Incorporation

Incorporated herein by reference from Exhibit 3.1 to the Company’s Quarterly Report on Form 10-Q, filed May 10, 2006.

Exhibit 3.1.2 Articles of Amendment to the Amended and Restated Articles of Incorporation

Incorporated herein by reference from Exhibit 3.1 to the Company’s Form 8-K, filed December 23, 2008.

Exhibit 3.1.3 Articles of Amendment to the Amended and Restated Articles of Incorporation

Incorporated herein by reference from Exhibit 3.4 to the Company’s Form S-1, filed June 22, 2009.

Exhibit 3.1.4 Articles of Amendment to the Amended and Restated Articles of Incorporation

Incorporated herein by reference from Exhibit 3.1 to the Company’s Form 8-K, filed July 20, 2009.

Exhibit 3.1.5 Articles of Amendment to the Amended and Restated Articles of Incorporation

Incorporated herein by reference from Exhibit 3.1 to the Company’s Form 8-K, filed December 3, 2009.

Exhibit 3.1.6 Articles of Amendment to the Amended and Restated Articles of Incorporation

Incorporated herein by reference from Exhibit 3.1 to the Company’s Form 8-K/A, filed July 14, 2010.

Exhibit 3.1.7 Articles of Amendment to the Amended and Restated Articles of Incorporation

Incorporated herein by reference from Exhibit 3.1 to the Company’s Form 8-K, filed June 25, 2010.

Exhibit 3.1.8 Articles of Amendment to the Amended and Restated Articles of Incorporation

Incorporated herein by reference from Exhibit 3.1 to the Company’s Form 8-K, filed June 1, 2011.

Exhibit 3.1.9 Articles of Amendment to the Amended and Restated Articles of Incorporation

Incorporated herein by reference from Exhibit 3.1 to the Company’s Form 8-K, filed December 13, 2013.

Exhibit 3.1.10 Articles of Amendment to the Amended and Restated Articles of Incorporation

Incorporated herein by reference from Exhibit 3.1 to the Company’s Form 8-K, filed May 30, 2018.

Exhibit 3.1.11 Articles of Amendment to the Amended and Restated Articles of Incorporation

Incorporated herein by reference from Exhibit 3.1 to the Company’s Form 8-K, filed May 23, 2023.

Exhibit 3.1.12 Articles of Amendment to the Amended and Restated Articles of Incorporation

Incorporated herein by reference from Exhibit 3.1 to the Company’s Form 8-K, filed May 22, 2025.

Exhibit 3.1.13 Certificate of Designations of the Series A Non-Voting Preferred Stock of Seacoast Incorporation

herein by reference from Exhibit 3.1 to the Company's Form 8K, filed October 6, 2025.

Exhibit 3.2 Amended and Restated By-laws of the Company

Incorporated herein by reference from Exhibit 3.1 to the Company’s Form 8-K, filed October 26, 2020.

Exhibit 4.1 Description of Securities

Incorporated herein by reference from Exhibit 4.1 to the Company’s Form 10-K, filed on February 26, 2021,

including any amendment or report filed for the purpose of updating such description, including the prospectus

constituting part of the Company's Registration Statement on Form S-4 (File No. 333-288902) filed on August

18, 2025, under the heading "DESCRIPTION OF SEACOAST CAPITAL STOCK".

Exhibit 4.2 Specimen Common Stock Certificate

Incorporated herein by reference from Exhibit 4.1 to the Company’s Form 10-K, filed on March 17, 2014.

Exhibit 4.3 Junior Subordinated Indenture

Dated as of March 31, 2005, between the Company and Wilmington Trust Company, as Trustee (including the form of the Floating Rate Junior Subordinated Note, which appears in Section 2.1 thereof), incorporated herein by reference from Exhibit 10.1 to the Company’s Form 8-K filed April 5, 2005.

Exhibit 4.4 Guarantee Agreement

Dated as of March 31, 2005 between the Company, as Guarantor, and Wilmington Trust Company, as Guarantee Trustee, incorporated herein by reference from Exhibit 10.2 to the Company’s Form 8-K filed April 5, 2005.

Exhibit 4.5 Amended and Restated Trust Agreement

Dated as of March 31, 2005, among the Company, as Depositor, Wilmington Trust Company, as Property Trustee, Wilmington Trust Company, as Delaware Trustee and the Administrative Trustees named therein, as Administrative Trustees (including exhibits containing the related forms of the SBCF Capital Trust I Common Securities Certificate and the Preferred Securities Certificate), incorporated herein by reference from Exhibit 10.3 to the Company’s Form 8-K filed April 5, 2005.

Exhibit 4.6 Indenture

Dated as of December 16, 2005, between the Company and U.S. Bank National Association, as Trustee (including the form of the Junior Subordinated Debt Security, which appears as Exhibit A to the Indenture), incorporated herein by reference from Exhibit 10.1 to the Company’s Form 8-K filed December 21, 2005.

Exhibit 4.7 Guarantee Agreement

Dated as of December 16, 2005, between the Company, as Guarantor, and U.S. Bank National Association, as Guarantee Trustee, incorporated herein by reference from Exhibit 10.2 to the Company’s Form 8-K filed December 21, 2005.

Exhibit 4.8 Amended and Restated Declaration of Trust

Dated as of December 16, 2005, among the Company, as Sponsor, Dennis S. Hudson, III and William R. Hahl, as Administrators, and U.S. Bank National Association, as Institutional Trustee (including exhibits containing the related forms of the SBCF Statutory Trust II Common Securities Certificate and the Capital Securities Certificate), incorporated herein by reference from Exhibit 10.3 to the Company’s Form 8-K filed December 21, 2005.

Exhibit 4.9 Indenture

Dated June 29, 2007, between the Company and LaSalle Bank, as Trustee (including the form of the Junior Subordinated Debt Security, which appears as Exhibit A to the Indenture), incorporated herein by reference from Exhibit 10.1 to the Company’s Form 8-K filed July 3, 2007.

Exhibit 4.10 Guarantee Agreement

Dated June 29, 2007, between the Company, as Guarantor, and LaSalle Bank, as Guarantee Trustee, incorporated herein by reference from Exhibit 10.2 to the Company’s Form 8-K filed July 3, 2007.

Exhibit 4.11 Amended and Restated Declaration of Trust

Dated June 29, 2007, among the Company, as Sponsor, Dennis S. Hudson, III and William R. Hahl, as Administrators, and LaSalle Bank, as Institutional Trustee (including exhibits containing the related forms of the SBCF Statutory Trust III Common Securities Certificate and the Capital Securities Certificate), incorporated herein by reference from Exhibit 10.3 to the Company’s Form 8-K filed July 3, 2007.

Exhibit 4.12 Shareholders Agreement

Dated as of May 29, 2025, by and among Seacoast Banking Corporation of Florida, Jennifer Morse Parr, Tracy Morse Dadeo and Mark Morse, incorporated by reference from Exhibit 10.1 to the Company's Form 8-K filed May 29, 2025.

Exhibit 10.1 Executive Deferred Compensation Plan*

Incorporated herein by reference from Exhibit 10.1 to the Company’s Form 10-K, filed on February 27, 2024.

Exhibit 10.2 Amended and Restated Directors Deferred Compensation Plan*

Incorporated herein by reference from Exhibit 10.2 to the Company’s Form 10-K, filed on February 27, 2024.

Exhibit 10.3 2013 Incentive Plan*

Incorporated herein by reference from Appendix A to the Company’s Proxy Statement on Form DEF 14A, filed April 9, 2013.

Exhibit 10.4 Amended Seacoast Banking Corporation of Florida 2021 Incentive Plan*

Incorporated herein by reference to Appendix C to the Company’s Definitive Proxy Statement on DEF 14A, filed with

the Commission on April 10, 2023.

Exhibit 10.5 Amended Seacoast Banking Corporation of Florida 2021 Incentive Plan*

Incorporated herein by reference to Appendix C to the Company's Definitive Proxy Statement on DEF 14A, filed with

the Commission on April 7, 2025.

Exhibit 10.6 Form of Change of Control Agreement with Charles Shaffer*

Incorporated herein by reference from Exhibit 10.1 to the Company’s Form 8-K, filed November 3, 2014.

Exhibit 10.7 Employment Agreement with Charles Shaffer*

Dated December 31, 2020 by and between the Company and Charles Shaffer, incorporated herein by reference from Exhibit 10.1 to the Company's Form 8-K, filed January 4, 2021.

Exhibit 10.8 Supplemental Executive Retirement Agreement*

Dated December 10, 2021, by and between Seacoast National Bank and Charles M. Shaffer, incorporated herein by

reference from Exhibit 10.1 to the Company’s Form 8-K, filed December 15, 2021.

Exhibit 10.9 Change in Control Agreement*

Dated January 20, 2021, by and between Tracey Dexter and Seacoast Banking Corporation of Florida incorporated

herein by reference from Exhibit 10.1 to the Company’s Form 8-K filed January 22, 2021.

Exhibit 10.10 Amended Executive Employment Agreement*

Dated December 15, 2023 by and between Julie Kleffel and SBCF, incorporated herein by reference from Exhibit 10.12 to the Company’s Form 10-K, filed on February 27, 2024.

Exhibit 10.11 Employment Agreement*

Dated December 15, 2023 by and between Austen Carroll and SBCF, incorporated herein by reference from Exhibit 10.13 to the Company’s Form 10-K, filed on February 27, 2024.

Exhibit 10.12 Developer Support Agreement

Dated as of October 1, 2025, by and among Seacoast National Bank, The Villages Operating Company, the Villages Development Operating Company, LLC, The Villages Land Holding Company, LLC, The Holding Company of the Villages, Inc., and The Villages Development Holding Company, LLC, incorporated by reference from Exhibit 10.1 to the Company's form 8-K filed on October 6, 2025.

Exhibit 19 Insider Trading Policy

Exhibit 21 Subsidiaries of Registrant

Exhibit 23.1 Consent of Independent Registered Public Accounting Firm

Exhibit 31.1 Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

Exhibit 31.2 Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

Exhibit 32.1** Certification of Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 and Section 111 the Emergency Economic Stability Act, as amended

Exhibit 32.2** Certification of Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 and Section 111 the Emergency Economic Stability Act, as amended

Exhibit 97.1 Compensation Recoupment Policy

Exhibit 101 The following materials from Seacoast Banking Corporation of Florida’s Annual Report on Form 10-K for the year ended December 31, 2025 formatted in Inline XBRL: (i) the Consolidated Statements of Income, (ii) the Consolidated Statements of Comprehensive Income, (iii) the Consolidated Balance Sheets, (iv) the Consolidated Statements of Cash Flows, (v) the Consolidated Statements of Shareholders' Equity and (vi) the Notes to the Consolidated Financial Statements, tagged as blocks of text and including detailed tags.

Exhibit 104 The cover page from the Company's Annual Report on Form 10-K for the year ended December 31, 2025, formatted in Inline XBRL.

The response to this portion of Item 15 is submitted under item (a)(3) above.

None.