X0508 4 2026-03-16 0 0000730708 SEACOAST BANKING CORP OF FLORIDA SBCF 0001078596 HUDSON DENNIS S III P.O. BOX 9012 815 COLORADO AVENUE STUART FL 34995-9012 1 0 0 0 1 Common Stock 2026-03-16 4 S 0 8000 30.04 D 228854 D Common Stock 18104 D Common Stock 34192.993 D Common Stock 9356 D Common Stock 21867 I Held by Spouse in Trust Common Stock 51416 I Held by Sherwood Partners, Ltd, family partnership Common Stock Right to Buy 31.15 2028-04-01 Common Stock 55279 55279 D Common Stock Right to Buy 28.69 2027-04-01 Common Stock 78021 78021 D Shares sold were effected pursuant to a Rule10b5-1 trading plan adopted by the Reporting Person on November 21, 2025 Shares held in Trust Shares held jointly with spouse Represents shares held in the Company's Retirement Savings Plan as of December 31, 2025 Held in IRA 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/ Dennis S. Hudson, III 2026-03-17