Significant Accounting Policies	9 Months Ended
Sep. 30, 2026
Significant Accounting Policies
Significant Accounting Policies	1. Significant Accounting Policies The significant accounting policies followed by the Corporation and its subsidiaries for interim financial reporting are consistent with the accounting policies followed for annual financial reporting. All adjustments which are, in the opinion of management, necessary for a fair statement of the results for the periods reported have been included in the accompanying consolidated financial statements and are of a normal recurring nature. The Corporation operates as a single segment entity for financial reporting purposes and adopted Accounting Standards Update (“ASU”) 2023-07, Segment Reporting, for the nine months ended September 30, 2026. The Company has determined that its current operating model is structured whereby banking locations and divisions serve a similar base of commercial and retail customers for which the Corporation provides similar products and services managed through similar processes and technology platforms. The Chief Financial Officer (“CFO”) serves as the Corporation’s chief operating decision maker (“CODM”). The CODM allocates resources and assesses performance of the Corporation based on the consolidated performance, excluding all significant intercompany balances and transactions of the Corporation and its wholly owned subsidiary, the banking segment, and does not significantly utilize disaggregated segment financial information for decision making and resource allocation. The CODM assesses performance for the banking segment and decides how to allocate resources based on net income as reported on the consolidated statement of income as consolidated net income. Accordingly, all of the Corporation’s operations are considered by management to be aggregated in one reportable operating segment, the banking segment. All categories of interest expense and non-interest expense as disclosed on the Corporation’s consolidated statements of income are considered significant to the banking segment. The Corporation has reviewed the requirements of ASU 2023-07 and has determined that no additional segment disclosures are required, specifically as a result of the following: •the Corporation does not use the tracked performance on the disaggregated segment level for decision-making or resource allocation purposes, •no significant segment-specific expenses or performance metrics are used internally for decision-making or resource allocation purposes, and •the level of financial consolidation presented in these financial statements aligns with the CODM’s internal reporting and decision-making process. The Omnibus Equity Incentive Plan is a long-term incentive plan that was designed to align the interests of participants with the interests of shareholders. Under the plan, awards may be made based on certain performance measures. The grants are made in restricted stock units that are subject to a vesting schedule. These shares vest over 3 years in increments of 33%, 33%, and 34%, respectively. For the nine months ended September 30, 2026 and 2025, 16,647 and 25,134 shares were awarded, respectively. These shares had a grant date value of $1.1 million and $1.2 million for 2026 and 2025, vest over three years, and their grant is not subject to future performance measures. Outstanding shares are increased at the award date for the total shares awarded. On March 1, 2026, the Corporation completed its acquisition of CedarStone Financial, Inc. Therefore, the results of CedarStone have been included in the results of operations beginning on March 1, 2026. See Note 12, Acquisitions, for more information. On August 26, 2026, the Corporation entered into an Agreement and Plan of Merger (the “Merger Agreement”) with First Illinois Corporation, Decatur, Illinois (“First Illinois”). Under the terms of the Merger Agreement, subject to the allocation and election procedures set forth therein, each outstanding share of First Illinois common stock will be converted into the right to receive either 0.5727 shares of the Corporation’s common stock or $44.35 in cash, with 70% of First Illinois common stock to be exchanged for the Corporation’s common stock and 30% to be exchanged for cash, in each case subject to the terms of the Merger Agreement. Cash will be paid in lieu of fractional shares. The merger is expected to close in the first quarter of 2027. On July 4, 2025, President Trump signed into law the legislation formally titled, “An Act to Provide for Reconciliation Pursuant to Title II of H. Con. Res. 14,” (“the Act”). The Corporation evaluated and applied the income tax implications of the Act. The Corporation’s financial statements were not materially impacted by the Act.

Significant Accounting Policies

9 Months Ended

Sep. 30, 2026

1. Significant Accounting Policies

The significant accounting policies followed by the Corporation and its subsidiaries for interim financial reporting are consistent with the accounting policies followed for annual financial reporting. All adjustments which are, in the opinion of management, necessary for a fair statement of the results for the periods reported have been included in the accompanying consolidated financial statements and are of a normal recurring nature.

The Corporation operates as a single segment entity for financial reporting purposes and adopted Accounting Standards Update (“ASU”) 2023-07, Segment Reporting, for the nine months ended September 30, 2026. The Company has determined that its current operating model is structured whereby banking locations and divisions serve a similar base of commercial and retail customers for which the Corporation provides similar products and services managed through similar processes and technology platforms. The Chief Financial Officer (“CFO”) serves as the Corporation’s chief operating decision maker (“CODM”). The CODM allocates resources and assesses performance of the Corporation based on the consolidated performance, excluding all significant intercompany balances and transactions of the Corporation and its wholly owned subsidiary, the banking segment, and does not significantly utilize disaggregated segment financial information for decision making and resource allocation. The CODM assesses performance for the banking segment and decides how to allocate resources based on net income as reported on the consolidated statement of income as consolidated net income. Accordingly, all of the Corporation’s operations are considered by management to be aggregated in one reportable operating segment, the banking segment. All categories of interest expense and non-interest expense as disclosed on the Corporation’s consolidated statements of income are considered significant to the banking segment.

The Corporation has reviewed the requirements of ASU 2023-07 and has determined that no additional segment disclosures are required, specifically as a result of the following:

•the Corporation does not use the tracked performance on the disaggregated segment level for decision-making or resource allocation purposes,

•no significant segment-specific expenses or performance metrics are used internally for decision-making or resource allocation purposes, and

•the level of financial consolidation presented in these financial statements aligns with the CODM’s internal reporting and decision-making process.

The Omnibus Equity Incentive Plan is a long-term incentive plan that was designed to align the interests of participants with the interests of shareholders. Under the plan, awards may be made based on certain performance measures. The grants are made in restricted stock units that are subject to a vesting schedule. These shares vest over 3 years in increments of 33%, 33%, and 34%, respectively. For the nine months ended September 30, 2026 and 2025, 16,647 and 25,134 shares were awarded, respectively. These shares had a grant date value of $1.1 million and $1.2 million for 2026 and 2025, vest over three years, and their grant is not subject to future performance measures. Outstanding shares are increased at the award date for the total shares awarded.

On March 1, 2026, the Corporation completed its acquisition of CedarStone Financial, Inc. Therefore, the results of CedarStone have been included in the results of operations beginning on March 1, 2026. See Note 12, Acquisitions, for more information.

On August 26, 2026, the Corporation entered into an Agreement and Plan of Merger (the “Merger Agreement”) with First Illinois Corporation, Decatur, Illinois (“First Illinois”). Under the terms of the Merger Agreement, subject to the allocation and election procedures set forth therein, each outstanding share of First Illinois common stock will be converted into the right to receive either 0.5727 shares of the Corporation’s common stock or $44.35 in cash, with 70% of First Illinois common stock to be exchanged for the

Corporation’s common stock and 30% to be exchanged for cash, in each case subject to the terms of the Merger Agreement. Cash will be paid in lieu of fractional shares. The merger is expected to close in the first quarter of 2027.

On July 4, 2025, President Trump signed into law the legislation formally titled, “An Act to Provide for Reconciliation Pursuant to Title II of H. Con. Res. 14,” (“the Act”). The Corporation evaluated and applied the income tax implications of the Act. The Corporation’s financial statements were not materially impacted by the Act.