ENTERPRISE FINANCIAL SERVICES CORP

Glossary of Acronyms, Abbreviations and Entities

The acronyms and abbreviations identified below are used in various sections of this Form 10-Q, including the Condensed Consolidated Financial Statements and the Notes to Condensed Consolidated Financial Statements in Item 1 and “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” in Item 2 of this Form 10-Q.

PART I - ITEM 1 - FINANCIAL STATEMENTS

Condensed Consolidated Balance Sheets (Unaudited)

Condensed Consolidated Statements of Income (Unaudited)

Condensed Consolidated Statements of Comprehensive Income (Unaudited)

Condensed Consolidated Statements of Stockholders’ Equity (Unaudited)

Condensed Consolidated Statements of Cash Flows (Unaudited)

Notes to Condensed Consolidated Financial Statements (Unaudited)

NOTE 1 -SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

The significant accounting policies used by the Company in the preparation of the condensed consolidated financial statements are summarized below.

Business and Consolidation

Enterprise is a financial holding company that provides a full range of banking and wealth management services to individuals and corporate clients primarily located in Arizona, California, Florida, Kansas, Missouri, Nevada, and New Mexico, and SBA loan and deposit productions offices throughout the country through its banking subsidiary, Enterprise Bank & Trust.

Operating results for the three months ended March 31, 2026 are not necessarily indicative of the results that may be expected for any other interim period or for the year ending December 31, 2026. These financial statements should be read in conjunction with the consolidated financial statements and footnotes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2025, as filed with the SEC.

Basis of Financial Statement Presentation

The accompanying unaudited condensed consolidated financial statements of the Company and its subsidiaries have been prepared in accordance with GAAP for interim financial information and pursuant to the rules and regulations of the SEC. Certain information and note disclosures normally included in annual financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to those rules and regulations, although the Company believes that the disclosures made are adequate to make the information presented not misleading. Except as disclosed herein, there has been no material change in the information disclosed in the Notes to Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2025.

The condensed consolidated financial statements include the accounts of the Company and its subsidiaries, all of which are wholly owned. All intercompany accounts and transactions have been eliminated.

In the opinion of management, the consolidated financial statements contain all adjustments (consisting of normal recurring accruals) considered necessary for the fair presentation of the statements of financial position, results of operations, and cash flow for the interim periods.

Recent Accounting Pronouncements

FASB ASU 2024-03, Income Statement-Reporting Comprehensive Income-Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses. ASU 2024-03 was issued in November 2024 to require public business entities to provide disaggregated disclosures, in the notes to the financial statements, of certain categories of expenses that are included in expense line items on the face of the income statement. The amendments in this update improve the disclosures about a public business entity’s expenses and address requests from investors for more detailed information about the types of expenses in commonly presented expense captions. The amendments in this update are effective for fiscal years beginning after December 15, 2026 and interim periods within fiscal years beginning after December 15, 2027, with early adoption permitted. The amendments may be adopted prospectively or retrospectively. The Company is evaluating the accounting and disclosure requirements of ASU 2024-03 and does not expect them to have a material effect on the Company’s consolidated financial statements.

FASB ASU 2025-09, Hedge Accounting Improvements. ASU 2025-09 was issued in November 2025 and is intended to better enable entities to achieve and maintain hedge accounting for highly effective economic hedges, while reducing the occurrence of missed forecasted transactions and unintuitive hedge designation events. ASU 2025-09 updated the following five areas in the hedge accounting model: 1) Similar risk assessment for cash flow hedges, 2) Hedging interest payments on choose-your-rate debt, 3) Cash flow hedges of nonfinancial forecasted transactions, 4) Net written options as hedging instruments, 5) Foreign currency-denominated debt designated as a hedging instrument and a hedged item. The amendments in this update are effective for annual and interim periods beginning after December 15, 2026, with early adoption permitted. The amendments should be applied on a prospective basis. The Company is evaluating the accounting and disclosure requirements of ASU 2025-09 and does not expect them to have a material effect on the Company’s consolidated financial statements.

NOTE 2 -EARNINGS PER SHARE

Basic earnings per common share is calculated by dividing net income available to common stockholders by the weighted average number of common shares outstanding during the period. Diluted earnings per common share gives effect to all dilutive potential common shares outstanding during the period using the treasury stock method.

The following table presents a summary of per common share data and amounts for the periods indicated:

For the three months ended March 31, 2026 and 2025, common stock equivalents of approximately 141,000 and 259,000, respectively, were excluded from the earnings per share calculations because their effect would have been anti-dilutive.

NOTE 3 -INVESTMENTS

The following tables present the amortized cost, gross unrealized gains and losses, ACL and fair value of securities available-for-sale and held-to-maturity as of the periods indicated:

The balance of held-to-maturity securities in the “Amortized Cost” column in the tables above include a cumulative net unamortized, unrealized gain of $6.8 million and $7.6 million at March 31, 2026 and December 31, 2025, respectively. Such amounts are amortized over the remaining life of the securities.

At March 31, 2026 and December 31, 2025, there were no holdings of securities of any one issuer in an amount greater than 10% of stockholders’ equity, other than U.S. Government agencies and sponsored enterprises. The agency mortgage-backed securities are all issued by U.S. Government agencies and sponsored enterprises. Securities of $1.6 billion and $1.7 billion at March 31, 2026 and December 31, 2025, respectively, were pledged as collateral to secure deposits of public institutions and for other purposes as required by law or contract provisions, in addition to collateral securing borrowing bases with the FHLB and the Federal Reserve.

The amortized cost and estimated fair value of debt securities at March 31, 2026, by contractual maturity, are shown below. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. The weighted average life of the mortgage-backed securities is approximately five years.

The following tables present a summary of available-for-sale investment securities in an unrealized loss position as of the periods indicated:

The unrealized losses at both March 31, 2026 and December 31, 2025 were attributable primarily to changes in market interest rates after the securities were purchased. At each of March 31, 2026 and December 31, 2025, the Company didnot have an ACL on available-for-sale securities.

Accrued interest on held-to-maturity debt securities totaled $11.7 million and $12.3 million at March 31, 2026 and December 31, 2025, respectively, and is excluded from the estimate of expected credit losses. The estimate of expected credit losses considers historical credit loss information adjusted for current conditions and reasonable and supportable forecasts. The ACL on held-to-maturity securities was $0.2 million at March 31, 2026 and $0.1 million at December 31, 2025.

There wereno sales of available-for-sale securities during the three months ended March 31, 2026. The Company sold $9.5 million of available-for-sale securities during the three months ended March 31, 2025 for a gain of $0.1 million.

Other Investments

At March 31, 2026 and December 31, 2025, other investments totaled $81.9 million and $80.9 million, respectively. As a member of the FHLB, the Bank is required to maintain a minimum investment in capital stock with the FHLB consisting of membership stock and activity-based stock. The FHLB capital stock of $10.0 million at March 31, 2026 and $9.4 million at December 31, 2025 is recorded at cost, which represents redemption value, and is included in “Other investments” in the Consolidated Balance Sheets. The remaining amounts in other investments primarily include investments in Small Business Investment Companies, Community Development Financial Institutions, private equity investments, and the Company’s investment in unconsolidated trusts used to issue trust preferred securities to third parties.

NOTE 4 -LOANS

The following table presents a summary of loans by category:

The loan balance includes a net premium on acquired loans of $0.8 million and $0.2 million at March 31, 2026 and December 31, 2025, respectively. At March 31, 2026 and December 31, 2025, loans and securities of $6.1 billion and $6.3 billion, respectively, were pledged to the FHLB and the Federal Reserve.

Accrued interest totaled $60.7 million and $58.3 million at March 31, 2026 and December 31, 2025, respectively, and was reported in “Other assets” on the Consolidated Balance Sheets.

The Company sold the guaranteed portion of SBA 7(a) loans of $25.4 million, resulting in a gain on sale of $1.4 million during the three months ended March 31, 2026. During the three months ended March 31, 2025, the Company sold the guaranteed portion of SBA 7(a) loans of $31.3 million, resulting in a gain on sale of $1.9 million.

The Company had $0.2 million of consumer mortgage loans secured by residential real estate in process of foreclosure at March 31, 2026 and December 31, 2025, respectively.

The following table presents a summary of the activity, by loan category, in the ACL on loans for the three months ended March 31, 2026 and 2025 as follows:

The CECL methodology incorporates various economic scenarios. The Company utilizes three forecasts in the model: Moody’s baseline, a stronger near-term growth upside and a moderate downside forecast. The Company weights these scenarios at 40%,30%, and 30%, respectively, which added approximately $8.8 million to the ACL on loans over the baseline model at March 31, 2026. The forecasts incorporate an expectation that the federal funds rate will continue to fall in 2026, and the broader macroeconomic risks to the loan portfolio from the conflict in Iran. The Company has also recognized various risks posed by loans in certain segments, including the commercial office sector, by allocating additional reserves to those segments. Some of the key risks to the forecasts that could result in future provision for credit losses are market reactions to the Federal Reserve policy actions that could push the economy into a recession, persistently higher inflation (including the impact of tariffs), tightening in the credit markets, and weakness in the financial system.

In addition to the CECL methodology, the Company incorporates qualitative adjustments into the ACL on loans to capture credit risks inherent within the loan portfolio that are not captured in the discounted cash flow method model. Included in these risks are 1) changes in lending policies and procedures, 2) actual and expected changes in business and economic conditions, 3) changes in the nature and volume of the portfolio, 4) changes in lending management, 5) changes in volume and the severity of past due loans, 6) changes in the quality of the loan review system, 7) changes in the value of underlying collateral, 8) the existence and effect of concentrations of credit and 9) other factors such as the regulatory, legal and competitive environments and events such as natural disasters, pandemics and geopolitical matters. At March 31, 2026, the ACL on loans included a qualitative adjustment of approximately $39.9 million. Of this amount, approximately $21.4 million was allocated to sponsor finance loans due to their mostly unsecured nature.

The following tables present a summary of gross charge-offs by loan class and year of origination as of the periods indicated:

The following tables present the recorded balance in nonperforming loans by category, excluding government guaranteed balances as of the dates indicated:

The nonperforming loan balances at March 31, 2026 and December 31, 2025 exclude government guaranteed balances of $28.2 million and $28.9 million respectively. Interest income recognized on nonaccrual loans was immaterial during the three months ended March 31, 2026 and 2025.

The following tables present a summary of collateral-dependent nonperforming loans by class of loan as of the dates indicated:

The following tables present a summary of aging of the recorded balance in past due loans by class and category as of the dates indicated:

The ACL on loans incorporates an estimate of lifetime expected credit losses and is recorded on each asset upon origination or acquisition. The starting point for the estimate of the ACL on loans is historical loss information, which includes losses from modifications of receivables to borrowers experiencing financial difficulty. The Company uses a probability of default and loss given default model to determine the ACL on loans.

An assessment of whether a borrower is experiencing financial difficulty is made on the date of a modification. The effect of most modifications made to borrowers experiencing financial difficulty is already included in the ACL on loans because of the measurement methodologies used to estimate the allowance.

The most common concession the Company provides to borrowers experiencing financial difficulty is a term extension. In limited circumstances, the Company may modify loans by providing principal forgiveness or an interest rate reduction. When principal forgiveness is provided, the amortized cost basis of the asset is written off against the ACL on loans. The amount of the principal forgiveness is deemed to be uncollectible; therefore, that portion of the loan is written off, resulting in a reduction of the amortized cost basis and a corresponding adjustment to the ACL on loans.

In some cases, the Company will modify a loan by providing multiple types of concessions. Typically, one type of concession, such as a term extension, is granted initially. If the borrower continues to experience financial difficulty, another concession, such as an interest rate reduction or principal forgiveness, may be granted.

The following tables show the recorded balance at the end of the dates listed for loans modified to borrowers experiencing financial difficulty, disaggregated by loan class and type of concession granted:

The following tables summarize the financial impacts of loan modifications made to borrowers experiencing financial difficulty by class and modification type outstanding at the date indicated:

The following tables present the aging of the recorded balance of modified loans in the last 12 months by class at the date indicated:

There were no loans that experienced a default during the three months ended March 31, 2026 or March 31, 2025, respectively, subsequent to being granted a modification in the preceding twelve months. Default is defined as movement to nonperforming status, foreclosure or charge-off.

As of March 31, 2026 and December 31, 2025, the Company allocated an immaterial amount in specific reserves to loans that have been restructured.

The Company categorizes loans into risk categories based on relevant information about the ability of borrowers to service their debt, such as current financial information, payment experience, credit documentation, and current economic factors among other factors. This analysis is performed on a quarterly basis. The Company uses the following definitions for risk ratings:

•Grades 1, 2, and 3 – Includes loans to borrowers with a continuous record of strong earnings, sound balance sheet condition and capitalization, ample liquidity with solid cash flow, and whose management team has experience and depth within their industry.

•Grade 4 – Includes loans to borrowers with positive trends in profitability, satisfactory capitalization and balance sheet condition, and sufficient liquidity and cash flow.

•Grade 5 – Includes loans to borrowers that may display fluctuating trends in sales, profitability, capitalization, liquidity, and cash flow.

•Grade 6 – Includes loans to borrowers where an adverse change or perceived weakness has occurred, but may be correctable in the near future. Alternatively, this rating category may also include circumstances where the borrower is starting to reverse a negative trend or condition, or has recently been upgraded from a 7, 8, or 9 rating.

•Grade 7 – Special Mention credits are borrowers that have experienced financial setback of a nature that is not determined to be severe or influence ‘ongoing concern’ expectations. Although possible, no loss is anticipated, due to strong collateral and/or guarantor support.

•Grade 8 –Substandard credits include those borrowers characterized by significant losses and sustained downward trends in balance sheet condition, liquidity, and cash flow. Repayment reliance may have shifted to secondary sources. Collateral exposure may exist and additional reserves may be warranted.

•Grade 9 –Doubtful credits include borrowers that may show deteriorating trends that are unlikely to be corrected. Collateral values may appear insufficient for full recovery, therefore requiring a partial charge-off, or debt renegotiation with the borrower. The borrower may have declared bankruptcy or bankruptcy is likely in the near term. All doubtful rated credits will be on non-accrual.

The recorded investment by risk category of the loans by class and year of origination is presented in the following tables as of the dates indicated:

In the tables above, loan originations in 2026 and 2025 with a classification of “special mention” or “classified” primarily represent renewals or modifications initially underwritten and originated in prior years.

The following tables summarize the risk category of the loans by loan type as of the dates indicated:

In the risk category tables above, guaranteed loan balances are included with a classification of “pass” due to the nature of these loans.

For certain loans, the Company evaluates credit quality based on the aging status.

The following tables present the recorded balance of loans based on payment activity as of the dates indicated:

NOTE 5 -COMMITMENTS AND CONTINGENT LIABILITIES

The Company issues financial instruments in the normal course of its business of meeting the financing needs of its clients. These financial instruments include commitments to extend credit and standby letters of credit. These instruments may involve, to varying degrees, elements of credit and interest rate risk in excess of the amounts recognized in the Consolidated Balance Sheets.

The Company’s extent of involvement and maximum potential exposure to credit loss in the event of nonperformance by the other party to the financial instrument for commitments to extend credit and standby letters of credit is not more than the contractual amount of these instruments.

The Company uses the same credit policies in making commitments and conditional obligations as it does for financial instruments included on its Consolidated Balance Sheets.

The following table summarizes the contractual amounts of significant off-balance-sheet financial instruments as of the dates indicated:

Off-Balance Sheet Credit Risk

Commitments to extend credit are agreements to lend to a client as long as there is no violation of any condition established in the contract. Commitments usually have fixed expiration dates or other termination clauses, may have significant usage restrictions, and may require payment of a fee. Of the total commitments to extend credit at March 31, 2026 and December 31, 2025, $111.6 million and $124.9 million, respectively, represent fixed rate loan commitments. Since certain of the commitments may expire without being drawn upon or may be revoked, the total commitment amounts do not necessarily represent future cash obligations. The Company evaluates each client’s credit worthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Company upon extension of credit, is based on management’s credit evaluation of the borrower. Collateral held varies, but may include accounts receivable, inventory, premises and equipment, and real estate. Other liabilities includes an ACL on unadvanced commitments of $6.4 million and $6.0 million at March 31, 2026 and December 31, 2025, respectively.

Letters of credit are conditional commitments issued by the Company to guarantee the performance of a client to a third party. These letters of credit are issued to support contractual obligations of the Company’s clients. The credit risk involved in issuing letters of credit is essentially the same as the risk involved in extending loans to clients. As of March 31, 2026, the approximate remaining terms of standby letters of credit range fromone month tofour years, three months.

Contingencies

The Company and its subsidiaries are, from time to time, parties to various legal proceedings arising out of their businesses. Management believes there are no such proceedings pending or threatened against the Company or its subsidiaries which, if determined adversely, would have a material adverse effect on the business, consolidated financial condition, results of operations or cash flows of the Company or any of its subsidiaries.

NOTE 6 -DERIVATIVE FINANCIAL INSTRUMENTS

Risk Management Objective of Using Derivatives

The Company is exposed to certain risks arising from both its business operations and economic conditions. The Company principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. The Company manages economic risks, including interest rate, liquidity, and credit risk primarily by managing the amount, sources, and duration of its assets and liabilities and the use of derivative financial instruments. Specifically, the Company enters into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known and uncertain cash amounts, the value of which are determined by interest rates. The Company’s derivative financial instruments are used to manage differences in the amount, timing, and duration of the Company’s known or expected cash receipts and its known or expected cash payments principally related to the Company’s loans and borrowings. The Company does not enter into derivative financial instruments for trading purposes.

Cash Flow Hedges of Interest Rate Risk

The Company’s objectives in using interest rate derivatives are to add stability to interest income and expense and to manage its exposure to interest rate movements. To accomplish this objective, the Company primarily uses interest rate swaps as part of its interest rate risk management strategy.

For hedges of the Company’s variable-rate loans, interest rate swaps designated as cash flow hedges involve the receipt of fixed amounts and the Company making variable rate payments. The Company has executed cash flow hedges to reduce a portion of variability in cash flows on the Company’s prime based loan portfolio. Select terms of the hedges are as follows:

The Company executed a prime based interest rate collar in the fourth quarter of 2022 with a notional amount of $100.0 million. The collar includes a cap of 8.14% and a floor of 5.25%. The collar matures on October 1, 2029.

The Company also executed a 1-month SOFR based interest rate collar in the fourth quarter of 2024 with a notional amount of $50.0 million. The collar includes a cap of 4.21% and a floor of 3.23%. The collar matures on November 1, 2029. These transactions are commonly referred to as zero cost collars, which involves the Company selling an interest rate cap where payments will be made when the index exceeds the cap rate, and the purchase of a floor where payments will be received if the index falls below the floor.

At December 31, 2025, the Company had executed a series of cash flow hedges to fix the effective interest rate for payments due on $32.1 million of junior subordinated debentures to a weighted-average-fixed rate of 2.64%. These hedges matured in the first quarter 2026.

The gain or loss on derivatives designated and qualified as cash flow hedges of interest rate risk are recorded in accumulated other comprehensive income and subsequently reclassified into interest income or expense in the same period(s) during which the hedged transaction affects earnings. Amounts reported in accumulated other comprehensive income related to derivatives will be reclassified to interest income or expense as interest payments are paid on the Company’s variable-rate loans and debt. During the next twelve months, the Company estimates $0.1 million will be reclassified as a decrease to interest income.

Non-designated Hedges

Derivatives not designated as hedges are not considered speculative and result from a service the Company provides to certain clients. The Company executes interest rate swaps with commercial banking clients to facilitate their respective risk management strategies. Those interest rate swaps are simultaneously hedged by offsetting derivatives the Company executes with a third party, such that the Company minimizes its net risk exposure resulting from such transactions. As the interest rate derivatives associated with this program do not meet the strict hedge accounting requirements, changes in the fair value of both the client derivatives and the offsetting derivatives are recognized directly in earnings as a component of other noninterest income.

The following table presents the fair value of the Company’s derivative financial instruments as well as their classification on the Balance Sheet as of the dates indicated:

Derivative assets are reported in “Other assets” on the Consolidated Balance Sheets. Derivative liabilities are reported in “Other liabilities” on the Consolidated Balance Sheets.

The following tables present a gross presentation, the effects of offsetting, and a net presentation of the Company’s financial instruments subject to offsetting. The gross amounts of assets or liabilities can be reconciled to the tabular disclosure of fair value. The fair value table above provides the location of financial assets and liabilities presented on the Consolidated Balance Sheets.

As of March 31, 2026, the fair value of counterparty derivatives in a net liability position, which includes accrued interest related to these agreements was $7.4 million. The Company has minimum collateral posting thresholds with certain of its derivative counterparties and posts collateral related to derivatives in a net liability position. The Company has received cash collateral from counterparties on derivatives that were in a net asset position as noted in the tables above.

NOTE 7 -FAIR VALUE MEASUREMENTS

The following tables summarize financial instruments measured at fair value on a recurring basis segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value:

From time to time, the Company measures certain assets at fair value on a nonrecurring basis. These include assets measured at the lower of cost or fair value that were recognized at fair value below cost at the end of the period. The following tables present financial instruments and non-financial assets still held as of the reporting date measured at fair value on a non-recurring basis:

The following table is a summary of the carrying amounts and fair values of the Company’s financial instruments as of the dates presented:

For information regarding the methods and assumptions used to estimate the fair value of each class of financial instruments refer to Note 17 –Fair Value Measurements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2025, as filed with the SEC.

NOTE 8 -STOCKHOLDERS’ EQUITY

Stockholders’ Equity

Accumulated Other Comprehensive Income (Loss)

The following table presents the changes in accumulated other comprehensive income (loss) after-tax by component:

The following table presents the pre-tax and after-tax changes in the components of other comprehensive income (loss):

NOTE 9 -SUPPLEMENTAL FINANCIAL INFORMATION

The following table presents other income and other expense components, including items that exceed one percent of the aggregate of total interest income and noninterest income in one or more of the periods indicated:

NOTE 10 -SEGMENT REPORTING

The Company has determined it hasone operating and reportable segment. The economic characteristics, including the nature, the type or class of client, and the nature of the regulatory environment of the products, services and business lines of the Company are all similar. The Company provides a full range of banking services, including mortgage, tax credit brokerage, wealth management and traditional banking services, to individuals and corporate clients. Refer to “Item 1. Note 1 – Summary of Significant Accounting Policies” for the accounting policies of the Company.

The Company’s chief operating decision maker (“CODM”) is the chief executive officer. The operating results that are regularly reviewed by the CODM are the consolidated results of the Company. The CODM uses the consolidated results of the Company in deciding whether to reinvest profits into the segment or into other parts of the entity, such as for acquisitions or to pay dividends. The CODM assesses performance for the segment and decides how to allocate resources based on net income, reported on the income statement as consolidated net income. The CODM is provided with the consolidated financial statement package on a monthly basis.

The Company considered the following factors, among others, in determining significant segment expenses: the magnitude of the expense item and its relevance to the segment’s performance, the variability and volatility of the expense item, and whether the expenses are used by the CODM. The Company’s significant segment revenues and expenses that are regularly provided to the CODM, including the Company’s profit or loss, have been included within the primary financial statements and notes thereto. Refer to “Item 1. Financial Statements” and “Item 1. Note 9 - Supplemental Financial Information” for these figures.