X0609 4 2026-04-15 0 0000730708 SEACOAST BANKING CORP OF FLORIDA SBCF 0001627974 Shaffer Charles M false SEACOAST BANKING CORPORATION OF FLORIDA P. O. BOX 9012 STUART FL 34995 1 1 0 0 Chairman, President & CEO 0 Common Stock 2026-04-15 4 A 0 15503 0 A 15503 D Common Stock 16663 D Common Stock 11495 D Common Stock 184480 D Common Stock 9369 D Common Stock 1576.4018 D Common Stock Right to Buy 28.69 2027-04-01 Common Stock 28544 28544 D Common Stock Right to Buy 31.15 2028-04-01 Common Stock 18952 18952 D Represents unvested time based restricted stock units granted on April 15, 2026, which vests over 3 years in one-third increments, beginning April 1, 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 Shares in the Company's Employee Stock Purchase Plan, as of March 31, 2026 Share equivalents held in Company's Retirement Savings Plan as of March 31, 2026 Granted pursuant to the Company's Amended and Restated 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/ Charles M. Shaffer 2026-04-17