FIRST BUSEY CORP /NV/

Net interest income is the difference between interest income and fees earned on loans and investments (“interest-earning assets”) and interest expense incurred on deposits and borrowings (“interest-bearing liabilities”). Interest rate levels and volume fluctuations within interest-earning assets and interest-bearing liabilities impact net interest income. Net interest margin is tax-equivalent net interest income as a percent of average interest-earning assets.

Certain assets with tax favorable treatment are evaluated on a tax-equivalent basis, assuming a federal income tax rate of 21.0%. Tax favorable assets generally have lower contractual pre-tax yields than fully taxable assets. A tax-equivalent analysis is performed by adding the tax savings to the earnings on tax favorable assets. After factoring in the tax favorable effects of these assets, the yields may be more appropriately evaluated against alternative earning assets. In addition to yield, various other risks are factored into the evaluation process.

Consolidated Average Balance Sheets and Interest Rates

The table below presents Busey’s Consolidated Average Balance Sheets, summarizing average balances for each major category of assets and liabilities, the interest income earned on interest-earning assets, the interest expense paid for interest-bearing liabilities, and the related interest yields for the periods indicated. Average information is provided on a daily average basis:

1. On a tax-equivalent basis and assuming a federal income tax rate of 21.0%. For a reconciliation of non-GAAP measures to the most directly comparable GAAP financial measures, see“Item 2. Management’s Discussion and Analysis—Non-GAAP Financial Information” included in this Quarterly Report.

2. Non-accrual loans have been included in average portfolio loans.

3. Interest income includes tax-equivalent adjustments of $0.8 million and $0.4 million for the three months ended September 30, 2025 and 2024, respectively.

4. Includes short-term and long-term borrowings. Interest expense includes non-usage fees on a revolving loan.

5. Annualized.

1. On a tax-equivalent basis and assuming a federal income tax rate of 21.0%. For a reconciliation of non-GAAP measures to the most directly comparable GAAP financial measures, see“Item 2. Management’s Discussion and Analysis—Non-GAAP Financial Information” included in this Quarterly Report.

2. Non-accrual loans have been included in average portfolio loans.

3. Interest income includes tax-equivalent adjustments of $2.1 million and $1.2 million for the nine months ended September 30, 2025 and 2024, respectively.

4. Includes short-term and long-term borrowings. Interest expense includes non-usage fees on a revolving loan.

5. Annualized.

Notable changes in average assets and average liabilities are summarized as follows:

Changes in net interest income and net interest margin are summarized as follows:

1. Assuming a federal income tax rate of 21.0%. For a reconciliation of non-GAAP measures to the most directly comparable GAAP financial measures, see“Item 2. Management’s Discussion and Analysis—Non-GAAP Financial Information” included in this Quarterly Report.

2. Net interest income expressed as a percentage of average earning assets, stated on a tax-equivalent basis.

Busey continues to evaluate and execute off-balance sheet hedging and balance sheet strategies as well as embedding rate protection in our asset originations to provide stabilization to net interest income in lower rate environments. Stability in core deposit balances, as well as retail time deposit and savings specials, have continued to provide sufficient funding flows to allow intentional runoff of brokered and high-cost, non-relationship funding. During the three months ended September 30, 2025, Busey executed a strategic targeted reduction of $794.6 million high-cost, non-relationship deposits bearing a weighted average cost of 4.45%, including $228.2 million of brokered deposits.

Net interest spread represents the difference between the average rate earned on earning assets and the average rate paid on interest-bearing liabilities, and is presented in the table below:

1. Net interest spread is calculated on a tax-equivalent basis.

Annualized net interest margins for the quarterly periods indicated were as follows:

Management attempts to mitigate the effects of an unpredictable interest-rate environment through effective portfolio management, prudent loan underwriting and pricing discipline, and operational efficiencies. For a description of accounting policies underlying the recognition of interest income and expense, refer to the Notes to Consolidated Financial Statements in Busey’s 2024 Annual Report.