X0306 4 2017-12-31 0 0000730708 SEACOAST BANKING CORP OF FLORIDA SBCF 0001627974 Shaffer Charles M SEACOAST BANKING CORPORATION OF FLORIDA P. O. BOX 9012 STUART FL 34995 0 0 0 1 EVP of subsidiary Common Stock 2017-12-31 4 F 0 3426 25.21 D 8170 D Common Stock 2213 D Common Stock 10832 D Common Stock 12231 D Common Stock 845.368 D Common Stock 1571 D Common Stock Right to Buy 23.91 2027-04-03 Common Stock 28544 28544 D Common Stock Right to Buy 14.82 2024-02-28 Common Stock 21255 21255 D Common Stock Right to Buy 12.63 2023-01-28 Common Stock 8100 8100 D Common Stock Right to Buy 10.54 2015-04-29 2024-04-29 Common Stock 25000 25000 D Common Stock Right to Buy 11.00 2014-06-28 2023-06-28 Common Stock 2400 2400 D Represents shares subject to performance-based restricted stock units ("PSUs") granted on June 28, 2013, that were subject to performance requirements which were attained over a period ending Dec. 31, 2015. One-third of the earned shares vested each on Dec. 31, 2016 and Dec. 31, 2017. The remaining shares shall vest on Dec. 31, 2018, provided the recipient remains in continuous service with the Company on each such vesting date. Shares in the Company's Employee Stock Purchase Plan. Represents shares of restricted stock units ("RSUs") granted on April 3, 2017. One-third of the shares vest on each of April 3, 2018, 2019 and 2020, provided the recipient remains in continuous service with the Company on each such vesting date. Share equivalents held in Company's Retirement Savings Plan as of September 30, 2017 Held jointly with spouse 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. Originally had two tiered vesting. Performance criteria was met and time-based vesting began on 12/1/2016. Option vests in equal installments at the end of each month over the next 48 months, provided that Optionee remains in continuous service on each applicable vesting date. Originally had two tiered vesting. Performance vesting criteria has been met and time-based vesting began on 7/1/2015. Option vests in equal installments over the next 48 months, provided the Optionee remains in continuous service on each applicable vesting date. 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), and then at the rate of 20% on each of the following two anniversaries thereafter 20%, subject to continued employment. Vests over 5 years at the rate of 20% on the first anniversary of the date of grant and then at the rate of 20% on each of the following four anniversaries thereafter, subject to continued employment. /s/ Dennis S. Hudson, III as Power of Attorney for Charles M. Shaffer 2018-01-04