International Bancshares Corporation (NASDAQ:IBOC), one of the largest independent bank holding companies in Texas, today reported net income for the three months ended June 30, 2025 of $100.1 million or $1.61 diluted earnings per common share ($1.61 per share basic) compared to approximately $97.0 million or $1.56 diluted earnings per common share ($1.56 per share basic), which represents an increase of 3.2% in diluted earnings per share and in net income over the corresponding period in 2024. Net income for the six months ended June 30, 2025 was $197.0 million or $3.16 diluted earnings per common share ($3.17 per share basic) compared to $194.3 million or $3.12 diluted earnings per common share ($3.13 per share basic), which represents an increase of 1.4% in net income and 1.3% in diluted earnings per share over the corresponding period of 2024.

Net income for the first six months of 2025 continues to be positively impacted by an increase in interest income earned on our investment and loan portfolios driven primarily by both an increase in the size of our investment and loan portfolios and the current interest rate environment, which remains elevated as a result of Federal Reserve Board actions to raise interest rates in recent years. Net interest income has been negatively impacted by an increase in interest expense, primarily driven by increases in rates paid on deposits. We continue to closely monitor and adjust rates paid on deposits to remain competitive to grow and retain deposits. Net income for the first six months of 2025 was also positively impacted by a decrease in our provision for credit loss expense.

"As we move to the latter half of 2025, we continue to be extremely pleased and proud to continue our industry-leading financial results. As we have done in the past, we will remain focused and vigilant on delivering superior customer service, continued execution of our long-standing practices of balance sheet, asset, liability, and liquidity management, and strong cost controls, while evaluating processes for efficiencies across our organization. We believe that with continued focus on these established practices supported by new initiatives, we will continue to deliver industry-leading financial results, especially in light of the current economic uncertainty in the United States and across world markets. This focus, we believe, will continue to keep us at the top of the rankings against other publicly held banks in America," said Dennis E. Nixon, president and CEO.

Total assets at June 30, 2025 were approximately $16.5 billion compared to approximately $15.7 billion at Dec. 31, 2024. Total net loans were approximately $9.0 billion at June 30, 2025 compared to approximately $8.7 billion at Dec. 31, 2024. Deposits were approximately $12.5 billion at June 30, 2025 compared to approximately $12.1 billion at Dec. 31, 2024.

IBC is a multi-bank financial holding company headquartered in Laredo, Texas, with 166 facilities and 255 ATMs serving 75 communities in Texas and Oklahoma.

"Safe Harbor" statement under the Private Securities Litigation Reform Act of 1995: The statements contained in this release which are not historical facts contain forward looking information with respect to plans, projections or future performance of IBC and its subsidiaries, the occurrence of which involve certain risks and uncertainties detailed in IBC's filings with the Securities and Exchange Commission.

Copies of IBC's SEC filings and Annual Report (as an exhibit to the 10-K) may be downloaded from the SEC filings site located at http://www.sec.gov/edgar.shtml.

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Judith Wawroski,

Treasurer and Principal Financial Officer

International Bancshares Corporation

(956) 722-7611

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