M&T BANK CORP

15. Segment information

Reportable segments have been determined based upon the Company’s organizational structure which is primarily arranged around the delivery of products and services to similar customer types. The Company's internal profitability reporting system produces financial information, inclusive of net interest income and income before taxes, for each segment. Such information is reviewed by the Company's Chief Executive Officer, who has been identified as the chief operating decision maker, in evaluating operating decisions, business performance and the allocation of resources. The Company's reportable segments are Commercial Bank, Retail Bank and Institutional Services and Wealth Management.

The financial information of the Company's segments was compiled utilizing the accounting policies described in note 21 of Notes to Financial Statements in M&T's 2025 Annual Report. The management accounting policies and processes utilized in compiling segment financial information are highly subjective and, unlike financial accounting, are not based on authoritative guidance similar to GAAP. As a result, reported segment results are not necessarily comparable with similar information reported by other financial institutions. Furthermore, changes in management structure or allocation methodologies and procedures may result in changes in reported segment financial data.

During the third quarter of 2026, the Company modified its internal management reporting structure to reflect organizational changes as follows.

•Certain tax credit investment and community lending activities were transferred from the All Other category to the Commercial Bank segment.

•Certain enterprise-wide support functions were transferred from the Retail Bank segment to the All Other category.

Prior period segment information has been recast to conform to the current presentation.

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15. Segment information, continued

Information about the Company's segments is presented in the accompanying table.

(a)Net interest income is the difference between actual taxable-equivalent interest earned on assets and interest paid on liabilities by a segment and a funding charge (credit) based on the Company's internal funds transfer pricing methodology. Segments are charged a cost to fund any assets (e.g. loans) and are paid a funding credit for any funds provided (e.g. deposits). The taxable-equivalent adjustment aggregated to $12 million for each of the three-month periods ended September 30, 2026 and 2025 and $35 million and $33 million for the nine-month periods ended September 30, 2026 and 2025, respectively, and is eliminated in "All Other" total revenues.

(b)Indirect expense represents centrally-allocated costs associated with certain technology, operations, risk management, finance, human resources and other support services provided by the "All Other" category to the Commercial Bank, Retail Bank and Institutional Services and Wealth Management segments.

A summary of the impact of the recast changes to net income and to average total assets by segment is presented in the accompanying table.

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