Greenville, South Carolina, April 17, 2026 – Southern First Bancshares, Inc. (NASDAQ: SFST) (the “Company,” “we,” “us,” or “our”) today announced the closing of the previously announced underwritten public offering of 1,207,500 shares of its common stock (the “Offering”), including 157,500 shares of common stock sold pursuant to the underwriters’ option to purchase additional shares, which was exercised in full, at a price of $54.00 per share.

The aggregate gross proceeds of the offering were approximately $65.2 million before discounts and expenses.  The Company intends to use the net proceeds from the offering for general corporate purposes, which may include supporting organic growth initiatives, providing capital to the Company’s bank subsidiary, redeeming or repurchasing outstanding indebtedness, including subordinated debt, and for working capital purposes.

Piper Sandler & Co. served as the sole book-running manager for the offering.  Keefe, Bruyette & Woods, A Stifel Company, served as co-manager.

This announcement is for informational purposes only and shall not constitute an offer to sell or the solicitation of an offer to buy any securities, nor shall there be any sale of these securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of such jurisdiction. The Company has filed a shelf registration statement (File No. 333-293279), including a base prospectus, and a preliminary prospectus supplement with the Securities and Exchange Commission (“SEC”) relating to the offering, and has filed a prospectus supplement relating to the offering. The offering was made only by means of the prospectus supplement and accompanying base prospectus. Before you invest, you should read the prospectus in the registration statement, the preliminary prospectus supplement, the prospectus supplement and other documents the Company has filed with the SEC for more complete information about the Company and this offering. You may get these documents for free by visiting EDGAR on the SEC website at www.sec.gov  or, alternatively, copies of the preliminary prospectus supplement and the accompanying base prospectus relating to the offering, and the prospectus supplement may be obtained by contacting Piper Sandler & Co., Attn: Prospectus Department, by Telephone: (800) 747-3924 or Email: [email protected] or Keefe, Bruyette & Woods, Inc., Attn: Equity Capital Markets, by Telephone: (800) 966-1559 or Email: [email protected].