X0306 4 2021-12-30 0 0000730708 SEACOAST BANKING CORP OF FLORIDA SBCF 0001830519 FORLENZA JOSEPH M P.O. BOX 9012 STUART FL 34995 0 1 0 0 EVP & CRO Common Stock 2021-12-31 4 F 0 400 35.39 D 5014 D Common Stock 2021-12-30 4 F 0 148 34.93 D 626 D Common Stock 2115 D Common Stock 1540 D Common Stock Right to Buy 31.15 2028-04-02 Common Stock 12635 12635 D Represents an unvested time-based restricted stock award granted on December 30, 2019, which shall vest over 3 years in one-third increments, beginning December 30, 2020, and on each anniversary thereafter, subject to continued employment. Represents an unvested time-based restricted stock award granted on April 1, 2020, which shall vest over 3 years in one-third increments, beginning April 1, 2021, and on each anniversary thereafter, subject to continued employment. Represents an unvested time-based restricted stock award granted on April 1, 2021, which shall vest over 3 years in one-third increments, beginning April 1, 2022, and on each anniversary thereafter, subject to continued employment. Granted pursuant to the Company's Amended and Restated 2013 Incentive Plan. Represents stock option granted on April 2, 2018 ("grant date") that 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, subject to continued employment. /s/ Kathy L. Hsu as Power of Attorney for Joseph M. Forlenza 2022-01-03