SEACOAST BANKING CORP OF FLORIDA

The SEC permits delivery of one copy of the proxy materials to shareholders who have the same address and last name under a procedure referred to as “householding”. We do not utilize householding for our shareholders of record. However, if you hold your shares through a broker, bank or other nominee, you may receive only one copy of the notice and, as applicable, any additional proxy materials that are delivered.

If you receive a single set of proxy materials as a result of householding, and you would like to have separate copies of proxy materials mailed to you in the future, please contact your broker, bank or other nominee. However, if you want to receive a paper proxy or notice or other proxy materials for purposes of this year’s Annual Meeting, follow the instructions included in the notice that was sent to you.

Whether or not you plan to attend the meeting, we hope you will vote as soon as possible. You may vote over the internet, as well as by telephone. You also may vote your shares by requesting a paper proxy card and completing, signing and returning it by mail. Please review the instructions on each of your voting options described in this proxy statement, as well as in the notice you received in the mail.

Charles M. Shaffer

Chairman and Chief Executive Officer

April 8, 2024