SOUTHSIDE BANCSHARES Business Summary

Southside Bancshares Inc (SBSI) operates as the bank holding company for Southside Bank, primarily generating revenue through net interest income derived from a diversified loan portfolio and a significant securities investment strategy. Its business is organized into four primary segments: Commercial Banking, which emphasizes commercial real estate and C&I lending; Consumer Banking, offering retail deposit and mortgage products; Municipal Banking, serving as a leading provider for local Texas governments; and Trust and Wealth Management services. As of early 2026, the company manages approximately $8.5 billion in assets and maintains a dominant market position in East Texas, holding a nearly 28% deposit market share in its home base of Smith County. SBSI competes directly with regional peers such as Prosperity Bancshares, Cullen/Frost Bankers, First Merchants Corp, and Origin Bancorp, distinguishing itself through a high-touch community banking model and a superior efficiency ratio of approximately 52.3%. Leadership is currently transitioned under President and CEO Keith Donahoe, who assumed the chief executive role in January 2026 following a successful tenure as President and a decade-long background as an Executive Vice President at Frost Bank. He is supported by long-tenured CFO Julie Shamburger, a CPA who has been with the institution since 1982 and has served as CFO since 2016. The executive team was further strengthened in late 2025 with the appointment of Chief Operations Officer Mitchell Craddock, formerly of digital banking firm Q2, and Chief Lending Officer Curtis Burchard, who brought over 40 years of experience from Texas Capital Bank. The Board of Directors is led by Independent Chairman Hilliard Shands and Vice Chairman John Garrett, a prominent real estate developer. This leadership mix combines deep-rooted regional expertise with modern digital transformation capabilities to navigate the competitive Texas financial landscape.