WESBANCO INC

Table 37: Composi tion of Securities

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Weighted average yields have been calculated on a taxable-equivalent basis using the federal statutory tax rate of 21%.

Total investment securities, which are a source of liquidity for Wesbanco as well as a contributor to interest income, increased by $14.9 million from December 31, 2025 to September 30, 2026. Throughout the first nine months of the year, the AFS portfolio increased by $65.4 million or 2.0%, primarily due to purchases exceeding maturities, calls and paydowns. The HTM portfolio decreased by $38.0 million or 3.4% due to maturities and calls of municipal securities. The weighted average yield of the portfolio increased 11 basis points from 3.28% at December 31, 2025 to 3.39% at September 30, 2026, primarily due to security purchases during the quarter at higher market rates.

Total gross unrealized securities losses increased $188.2 million, from $300.2 million as of December 31, 2025 to $488.4 million at September 30, 2026. The increase in unrealized losses from December 31, 2025 was due to an increase in market rates through the first nine months of 2026 causing market prices to decrease on the investment portfolio. Wesbanco believes that none of the unrealized losses on AFS debt securities at September 30, 2026 require an ACL. Please refer to Note 3, “Securities,” of the Consolidated Financial Statements for additional information. Wesbanco does not have any investments in private mortgage-backed securities or those that are collateralized by sub-prime mortgages, nor does Wesbanco have any exposure to collateralized debt obligations or government-sponsored enterprise preferred stocks.

Net unrealized losses on AFS securities included in AOCI, net of tax, as of September 30, 2026, and December 31, 2025 were $241.6 million and $139.5 million, respectively. These net unrealized pre-tax losses represent temporary fluctuations resulting from changes in market rates in relation to fixed yields in the AFS portfolio, and on an after-tax basis are accounted for as an adjustment to other comprehensive income in shareholders’ equity. Net unrealized pre-tax losses in the HTM portfolio, which are not accounted for in other comprehensive income, were $169.9 million at September 30, 2026, compared to $96.2 million at December 31, 2025. With approximately 25% of the investment portfolio in the HTM category, volatility in interest rates does not have as much of an impact on other comprehensive income as if the entire portfolio were included in the AFS category.

Equity securities, of which a portion consists of investments in various mutual funds held in grantor trusts formed in connection with a key officer and director deferred compensation plan, are recorded at fair value. Gains and losses due to fair value fluctuations on equity securities are included in net securities gains or losses. For those equity securities relating to the key officer and director deferred compensation plan, the corresponding change in the obligation to the employee is recognized in employee benefits expense.

The corporate and municipal bonds in Wesbanco’s HTM debt portfolio are analyzed quarterly to determine if an ACL is warranted. Wesbanco uses a database of historical financials of all corporate and municipal issuers and actual historic default and recovery rates on rated and non-rated transactions to estimate expected credit losses on an individual security basis. The expected credit losses are adjusted quarterly and are recorded in an ACL on the Consolidated Balance Sheet, which is deducted from the amortized cost basis of the HTM portfolio as a contra asset. The losses are recorded on the Consolidated Income Statement in the provision for credit losses. Accrued interest receivable on HTM securities, which was $7.7 million and $8.2 million as of September 30, 2026 and December 31, 2025, respectively, is excluded from the estimate of credit losses. HTM investments in U.S. Government sponsored entities and agencies as well as mortgage-backed securities and collateralized mortgage obligations, which are all either issued by a direct governmental entity or a government-sponsored entity, have no historical evidence supporting expected credit losses; therefore, Wesbanco has estimated these losses at zero, and will monitor this assumption in the future for any economic or governmental policies that could affect this assumption. Wesbanco recorded an allowance on HTM debt securities of $0.2 million as of September 30, 2026 and December 31, 2025.

Wesbanco uses prices from independent pricing services and, to a lesser extent, indicative (non-binding) quotes from independent brokers, to measure the fair value of its securities. Wesbanco validates prices received from pricing services or brokers using a variety of methods, including, but not limited to, comparison to secondary pricing services, corroboration of pricing by reference to other independent market data such as secondary broker quotes and relevant benchmark indices, review of pricing by personnel familiar with market liquidity and other market-related conditions, review of pricing service methodologies, review of independent auditor reports received from the pricing service regarding its internal controls, and through review of inputs and assumptions used in pricing certain securities thinly traded or with limited observable data points. The procedures in place provide management with a sufficient understanding of the valuation models, assumptions, inputs and pricing to reasonably measure the fair value of Wesbanco’s securities. For additional disclosure relating to fair value measurements, refer to Note 8, “Fair Value Measurement” in the Consolidated Financial Statements.

LOANS AND CREDIT RISK

Loans represent Wesbanco’s single largest balance sheet asset classification and the largest source of interest income. Business purpose loans consist of CRE loans and other C&I loans that are not secured by real estate. CRE loans are further segmented into land and construction loans, and loans for improved property. Consumer purpose loans consist of residential real estate loans, home equity lines of credit and other consumer loans. Loans HFS generally consist of residential real estate loans originated for sale in the secondary market, but at times may also include other types of loans. The outstanding balance of each major category of the loan portfolio is summarized in Table 38.

The risk that borrowers will be unable or unwilling to repay their obligations and default on loans is inherent in all lending activities. Credit risk arises from many sources including general economic conditions, external events that impact businesses or industries, isolated events that impact a major employer, individual loss of employment or other personal hardships, as well as changes in interest rates or the value of collateral. Credit risk is also impacted by a concentration of exposure within a geographic market or to one or more borrowers, industries or collateral types. The primary goal in managing credit risk is to minimize the impact of default by an individual borrower or group of borrowers. Credit risk is managed through the initial underwriting process as well as through ongoing monitoring and administration of the portfolio that varies by the type of loan. The Bank’s credit policies establish standard underwriting guidelines for each type of loan and require an appropriate evaluation of the credit characteristics of each borrower. This evaluation includes the borrower’s primary source of repayment capacity; the adequacy of collateral, if any, to secure the loan; the potential value of personal guarantees as secondary sources of repayment; and other factors unique to each loan that may increase or mitigate its risk. Credit bureau scores are also considered when evaluating consumer purpose loans as well as guarantors of business purpose loans. However, the Bank does not periodically update credit bureau scores subsequent to when loans are made to determine changes in credit history.

Credit risk is mitigated for all types of loans by continuously monitoring delinquency levels and pursuing collection efforts at the earliest stage of delinquency. The Bank also monitors general economic conditions, including employment, housing activity and real estate values in its market. The Bank also periodically evaluates and changes its underwriting standards when warranted based on market conditions, the historical performance of a category of the portfolio, or other external factors. Credit risk is also regularly evaluated for the impact of adverse economic and other events that increase the risk of default and the potential loss in the event of default, to understand the impact on the Bank’s earnings and capital.

Commercial loan risk grades are determined based on an evaluation of the relevant characteristics of each loan, assigned at inception and adjusted thereafter at any time to reflect changes in the risk profile throughout the life of each loan. The primary factors used to determine the risk grade are the sufficiency, reliability and sustainability of the primary source of repayment and overall financial strength of the borrower. The rating system more heavily weights the debt service coverage, leverage and loan-to-value factors to derive the risk grade. Other factors that are considered at a lesser weighting include management, industry or property-type risks, payment history, collateral and personal guarantees.