Southside Bancshares Inc.

As previously disclosed, we issued $150.0 million of our subordinated debt at 7.00% fixed to floating rate notes during August.

SEC original ↗Southside Bancshares Inc. — Earnings release (8-K exhibit)EX-99Oct 24, 2025

Linked quarter, net interest income increased $1.45 million and our net interest margin decreased one basis point to 2.94% due to the $150.0 million issuance of subordinated debt during the quarter.

SEC original ↗Southside Bancshares Inc. — Earnings release (8-K exhibit)EX-99Oct 24, 2025

During the third quarter ended September 30, 2025, we repurchased 26,692 shares of the Company s common stock at an average price of $30.24 per share, pursuant to our Stock Repurchase Plan (the Plan ).

SEC original ↗Southside Bancshares Inc. — Earnings release (8-K exhibit)EX-99Oct 24, 2025

On October 16, 2025, the Board of the Company increased its authorization under the Company s current Plan by 1.0 million shares, for a total authorization to repurchase up to 2.0 million shares of the Company s common stock from time to time.

SEC original ↗Southside Bancshares Inc. — Earnings release (8-K exhibit)EX-99Oct 24, 2025

Under the Plan, previously approved on July 20, 2023, the Company has repurchased approximately 868,000 shares at an average price per share of $28.43, resulting in approximately 1.1 million shares remaining.

SEC original ↗Southside Bancshares Inc. — Earnings release (8-K exhibit)EX-99Oct 24, 2025

Repurchases of our outstanding common stock may be carried out in open market purchases, privately negotiated transactions or pursuant to any trading plan that might be adopted in accordance with Rule 10b5-1 of The Securities Exchange Act of 1934, as amended.

SEC original ↗Southside Bancshares Inc. — Earnings release (8-K exhibit)EX-99Oct 24, 2025

Forward-looking statements are statements with respect to the Company s beliefs, plans, expectations, objectives, goals, anticipations, assumptions, estimates, intentions and future performance and are subject to significant known and unknown risks and uncertainties, which could cause the Company's actual results to differ materially from the results discussed in the forward-looking statements.

SEC original ↗Southside Bancshares Inc. — Earnings release (8-K exhibit)EX-99Oct 24, 2025

For example, trends in asset quality, capital, liquidity, the Company's ability to sell nonperforming assets, expense reductions, planned operational efficiencies and earnings from growth and certain market risk disclosures, including the impact of interest rates and our expectations regarding rate changes, tax reform, inflation, tariffs, the impacts related to or resulting from other economic factors are based upon information presently available to management and are dependent on choices about key model characteristics and assumptions and are subject to various limitations.

SEC original ↗Southside Bancshares Inc. — Earnings release (8-K exhibit)EX-99Oct 24, 2025

The most significant factors that could cause future results to differ materially from those anticipated by our forward-looking statements include general economic conditions in our markets, including the ongoing impact of higher inflation levels, interest rate fluctuations, including the impact of changes in interest rates on our financial projections, models and guidance, as well as the effects of declines in the real estate market, tariffs or trade wars (including reduced consumer spending, lower economic growth or recession, reduced demand for U.

SEC original ↗Southside Bancshares Inc. — Earnings release (8-K exhibit)EX-99Oct 24, 2025

Net income — prior quarter passage and this quarter's passage are both cited.

SEC original ↗Southside Bancshares Inc. — Earnings release (8-K exhibit)EX-99Oct 24, 2025

Net income — prior quarter passage and this quarter's passage are both cited.

SEC original ↗Southside Bancshares Inc. — Earnings release (8-K exhibit)EX-99Oct 24, 2025