SEACOAST BANKING CORP OF FLORIDA

Seacoast and Heartland Bancshares, Inc. will be filing a proxy statement/prospectus relating to the transaction and other relevant documents concerning the transaction with the United States Securities and Exchange Commission (the “SEC”). This communication does not constitute an offer to sell or the solicitation of an offer to buy any securities or a solicitation of any vote or approval. WE URGE INVESTORS TO READ THE PROXY STATEMENT/PROSPECTUS AND ANY OTHER DOCUMENTS TO BE FILED WITH THE SEC IN CONNECTION WITH THE TRANSACTION OR INCORPORATED BY REFERENCE IN THE PROXY STATEMENT/PROSPECTUS BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION.

Investors will be able to obtain these documents free of charge at the SEC’s website (https://www.sec.gov). In addition, documents filed with the SEC by Seacoast will be available free of charge by contacting Investor Relations at (772) 288-6085.

The directors, executive officers, and certain other members of management and employees of Heartland Bancshares, Inc. are participants in the solicitation of proxies in favor of the transaction from the Heartland Bancshares, Inc. shareholders.