Greenville, South Carolina, October 28, 2025 – Southern First Bancshares, Inc. (NASDAQ: SFST), holding company for Southern First Bank, today announced its financial results for the nine months ended September 30, 2025.

“Our third quarter financial performance clearly shows the steady momentum that continued this quarter, in line with our expectations. Our team remains highly focused on executing our plans for increased profitability and high-quality loan growth, funded by client retail deposits, which is core to our full relationship banking strategy. Superior asset quality metrics and margin expansion are the result of our intentional and disciplined approach. We have again achieved historically high revenue growth over the same quarter last year, at a rate which was two and a half times our expense growth. This expanded profitability further strengthened capital levels, providing ample support for our strong business pipelines. Although we maintain a cautious outlook and actively monitor for emerging risks, our markets have continued to exhibit vibrant and sustainable growth momentum,” stated Art Seaver, Chief Executive Officer. “We continue to attract and retain experienced bankers who share our commitment to outstanding client service, delivered with a personal touch, and to supporting our local communities. Our Southeastern markets remain healthy and resilient, and we are well positioned to benefit from the opportunities created by ongoing banking industry consolidation. This quarter’s results reinforce our optimism in the financial outlook for the remainder of the year.”

2025 Third Quarter Highlights

• Diluted earnings per common share of $1.07, up $0.26, or 32%, from Q2 2025, and $0.53, or 98%, compared to Q3 2024
• Net interest margin of 2.62%, compared to 2.50% for Q2 2025 and 2.08% for Q3 2024
• Total loans of $3.8 billion, up 4% (annualized) from Q2 2025; core deposits of $2.9 billion, up 2% (annualized) from Q2 2025
• Nonperforming assets to total assets of 0.27% and past due loans to total loans of 0.18%
• Book value per common share of $43.51 increased 12% (annualized) from Q2 2025 and 9% compared to Q3 2024; Tangible Common Equity (TCE) ratio of 8.18%