X0609 4 2026-04-15 0 0000730708 SEACOAST BANKING CORP OF FLORIDA SBCF 0001726466 Kleffel Juliette false PO BOX 9012 STUART FL 34995 0 1 0 0 EVP, Chief Operating Officer 0 Common Stock 2026-04-15 4 A 0 11820 0 A 11820 D Common Stock 6385 D Common Stock 3449 D Common Stock 78321 D Common Stock Right to Buy 31.15 2028-04-01 Common Stock 12635 12635 D Common Stock Right to Buy 28.69 2027-04-01 Common Stock 14831 14831 D Represents unvested time based restricted stock units granted on April 15, 2026, which vests over 3 years in one-third increments, beginning April 15, 2027, and on each anniversary thereafter subject to continued employment Represents an unvested time-based restricted stock award granted on April 1, 2024, which shall vest over 3 years in one-third increments, beginning April 1, 2025, and on each anniversary thereafter, subject to continued employment. Represents an unvested time based restricted stock award grated on April 1, 2025, which vests over 3 years in one-third increments, beginning April 1, 2026, and on each anniversary thereafter subject to continued employment Granted pursuant to Seacoast Banking Corporation of Florida's 2013 Incentive Plan. Vests over 3 years in one-third increments each anniversary of the date of grant beginning on the first anniversary of the date of grant (the date indicated), subject to continuous employment on each vesting date and the Company's banking subsidiary meets certain capital requirements. /s/ Kathy L. Hsu as Power of Attorney for Juliette Kleffel 2026-04-17