FORM 10-Q(Mark One) ☒QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June30, 2026OR ☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the transition period from _______________ to __________________.Commission File No. 0-13660 Seacoast Banking Corporation of Florida(Exact Name of Registrant as Specified in its Charter) (772)287-4000 Securities registered pursuant to Section 12(b) of the Act: Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the SecuritiesExchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports),and (2) has been subject to such filing requirements for the past 90 days.Yes☒No☐ Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submittedpursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that theregistrant was required to submit such files).Yes☒No☐ Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smallerreporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smallerreporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act. Large accelerated filer☒Accelerated filer☐Non-accelerated filer☐Smaller reporting company☐Emerging growth company☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period forcomplying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐ Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).Yes☐No☒ Common Stock, $0.10 Par Value – 96,822,799 shares outstanding as of June30, 2026 INDEX SEACOAST BANKING CORPORATION OF FLORIDA Glossary of Defined Terms3Part IFINANCIAL INFORMATIONItem 1.Financial Statements (Unaudited)Consolidated statements of income – Three and six months endedJune 30, 2026 and 20255Consolidated statements of comprehensive income – Three and six months endedJune 30, 2026 and20257Consolidated balance sheets -June 30, 2026 andDecember 31, 20258Consolidated statements of cash flows – Six months endedJune 30, 2026 and 20259Consolidated statements of shareholders’ equity - Three and six months endedJune 30, 2026 and 202511Notes to Consolidated Financial Statements13Item 2.Management’s Discussion and Analysis of Financial Condition and Results of Operations39Item 3.Quantitative and Qualitative Disclosures about Market Risk58Item 4.Controls and Procedures59Part IIOTHER INFORMATIONItem 1.Legal Proceedings59Item 1A.Risk Factors59Item 2.Unregistered Sales of Equity Securities and Use of Proceeds60Item 3.Defaults upon Senior Securities60Item 4.Mine Safety Disclosures60Item 5.Other Information60Item 6.Exhibits60SIGNATURES63 Table of Contents Part I. FINANCIAL INFORMATION Item 1. Financial Statements SEACOAST BANKING CORPORATION OF FLORIDA AND SUBSIDIARIESCONSOLIDATED STATEMENTS OF INCOME (Unaudited) Table of Contents SEACOAST BANKING CORPORATION OF FLORIDA AND SUBSIDIARIESCONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) SEACOAST BANKING CORPORATION OF FLORIDA AND SUBSIDIARIESCONSOLIDATED BALANCE SHEETS (Unaudited) SEACOAST BANKING CORPORATION OF FLORIDA AND SUBSIDIARIESCONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (In thousands) SEACOAST BANKING CORPORATION OF FLORIDA AND SUBSIDIARIESCONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (In thousands) SEACOAST BANKING CORPORATION OF FLORIDA AND SUBSIDIARIESCONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND SHAREHOLDERS’EQUITY(Unaudited) SEACOAST BANKING CORPORATION OF FLORIDA AND SUBSIDIARIESNOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED) Note 1 – Basis of Presentation Basis of Presentation:The accompanying unaudited consolidated financial statements of Seacoast Banking Corporation of Florida andits subsidiaries (the “Company”) have been prepared in accordance with U.S. GAAP for interim financial information and with theinstructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, the financial statements do not include all of theinformation and footnotes required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments(consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Certain prior period amountshave been reclassified to conform to the current period presentation. Operating results for the three and six months ended June 30, 2026, are not necessarily indicative of the results that may be expectedfor the year ending