The acronyms and abbreviations identified below are used in various sections of this Form 10-K, including “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” in Item 7 and the Consolidated Financial Statements and the Notes to Consolidated Financial Statements in Item 8 of this Form 10-K.

Enterprise Financial Services Corp (“we,” “us,” or “our”), a Delaware corporation, is a financial holding company headquartered in Clayton, Missouri incorporated in December 1994. We are the holding company for Enterprise Bank & Trust, a full-service financial institution offering banking and wealth management services to individuals and corporate customers primarily located in Arizona, California, Kansas, Missouri, Nevada, and New Mexico. Our

executive offices are located at 150 North Meramec Avenue, Clayton, Missouri 63105, and our telephone number is (314) 725-5500.

Various reports provided to the SEC, including our annual reports, quarterly reports, current reports, proxy statements, and amendments to such reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended, are available free of charge on our website at www.enterprisebank.com under the “Investor Relations” link. These reports are made available as soon as reasonably practicable after they are electronically filed with or furnished to the SEC. Our filings with the SEC are also available on the SEC’s website at www.sec.gov. All website addresses given in this document are for information only and are not intended to be an active link or to incorporate any website information into this document.

The following is a summary description of the relevant laws, rules, and regulations governing banks and financial holding companies. The description of, and references to, the statutes and regulations below are brief summaries and do not purport to be complete. The descriptions are qualified in their entirety by reference to the related statutes and regulations.

The regulatory and supervisory structure establishes a comprehensive framework of activities in which an institution can engage and is intended primarily for the protection of depositors, the deposit insurance funds and the banking system as a whole, rather than for the protection of shareholders or creditors. The regulatory structure also gives the regulatory authorities extensive discretion in connection with their supervisory and enforcement activities and examination policies, including policies concerning the establishment of deposit insurance assessment fees, classification of assets and establishment of adequate loan loss reserves for regulatory purposes.

Various legislation is from time to time introduced in Congress and Missouri’s legislature. Such legislation may change applicable statutes and the operating environment in substantial and unpredictable ways. We cannot determine the ultimate effect that future legislation or implementing regulations would have upon our financial condition or upon our results of operations or the results of operations of any of our subsidiaries.

The Dodd-Frank Act, by way of example, contains a comprehensive set of provisions designed to govern the practices and oversight of financial institutions and other participants in the financial markets. The Dodd-Frank Act made extensive changes in the regulation of financial institutions and their holding companies. Some of the changes brought about by the Dodd-Frank Act have been modified by the Economic Growth, Regulatory Relief, and Consumer Protection Act of 2018 (the “Regulatory Relief Act”), signed into law on May 24, 2018.

The Company is a financial holding company registered under the Bank Holding Company Act of 1956, as amended (“BHCA”). As a financial holding company, the Company is subject to regulation and examination by the Federal Reserve, and is required to file periodic reports of its operations and such additional information as the Federal Reserve may require. In order to remain a financial holding company, the Company must continue to be considered well managedwell-managed and well-capitalized by the Federal Reserve, and the Bank must continue to be considered well managedwell-managed and well-capitalized by the FDIC, and have at least a “satisfactory” rating under the Community Reinvestment Act. See “Liquidity and Capital Resources” in the Management Discussion and Analysis for more information on our capital adequacy, and “Bank Subsidiary - Community Reinvestment Act” below for more information on the Community Reinvestment Act.

than 25%, of any class of voting securities of the Company. The regulations provide a procedure for challenging rebuttable presumptions of control.

The Bank is a Missouri trust company with banking powers and is subject to supervision and regulation by the Missouri Division of Finance. In addition, as a Federal Reserve non-member bank, it is subject to supervision and regulation by the FDIC. The Bank is a member of the FHLB of Des Moines.

The Bank is subject to extensive federal and state regulatory oversight. The various regulatory authorities regulate or monitor all areas of the banking operations, including security devices and procedures, adequacy of capitalization and loss reserves, loans, investments, borrowings, deposits, mergers, issuance of securities, payment of dividends, interest rates payable on deposits, interest rates or fees chargeable on loans, establishment of branches, corporate reorganizations, maintenance of books and records, and adequacy of staff training to carry on safe lending and deposit gathering practices. The Bank must maintain certain capital ratios and is subject to limitations on aggregate investments in real estate, bank premises, low-income housing projects, and furniture and fixtures. In connection with their supervision and regulation responsibilities, the Bank is subject to periodic examination by the FDIC and Missouri Division of Finance.

On July 2,In 2013, the Federal Reserve, FDIC and OCC approved a final rule to establish a new comprehensive regulatory capital framework for all U.S. banking organizations. This regulatory capital framework, commonly referred to as Basel III, implementsimplemented several changes to the U.S. regulatory capital framework required by the Dodd-Frank Act.

The Basel III final rule, effective January 1, 2015, established a new CET1 requirement and increased the minimum tier 1 capital requirement to 6.0%. In addition, all banking organizations must maintain a CCB consisting of CET1 capital in an amount equal to 2.5% of risk-weighted assets in order to avoid restrictions on their ability to make capital distributions and to pay certain discretionary bonus payments to executive officers. The CCB effectively increasesincreased the minimum CET1 capital, tier 1 capital, and total capital ratios for U.S. banking organizations to 7.0%, 8.5%, and 10.5%, respectively, as of January 1, 2019.

As required by the Basel III final rule, capital instruments such as trust preferred securities and cumulative preferred shares have been phased out of tier 1 capital for banking organizations that had $15 billion or more in total consolidated assets as of December 31, 2009, and grandfathered as tier 1 capital such instruments issued by smaller entities prior to May 19, 2010 (provided they do not exceed 25% of tier 1 capital). The Company’s trust preferred securities currently are grandfathered under this provision.

Federal law establishes a system of prompt corrective action to resolve the problems of undercapitalized banks. Under this system, the FDIC has established five capital categories (“well-capitalized,” “adequately capitalized,” “undercapitalized,” “significantly undercapitalized,” and “critically undercapitalized”) and is required to take various mandatory supervisory actions, and is authorized to take other discretionary actions with respect to banks in the three undercapitalized categories. The severity of any such actions taken will depend upon the capital category in which a bank is placed. Generally, subject to a narrow exception, current federal law requires the FDIC to appoint a receiver or conservator for a bank that is critically undercapitalized.

affiliates. Regulation W also prohibits, among other things, an institution from engaging in certain transactions with certain affiliates unless the transactions are on terms substantially the same, or at least as favorable to such institution or its subsidiaries, as those prevailing at the time for comparable transactions with nonaffiliated companies. Federal law also places restrictions on the Bank’s ability to extend credit to its executive officers, directors, principal shareholders and their related interests. These extensions of credit must be made on substantially the same terms, including interest rates and collateral, as those prevailing at the time for comparable transactions with unrelated third parties; and must not involve more than the normal risk of repayment or present other unfavorable features.

The operations of the Company and its subsidiaries are affected not only by general economic conditions, but also by the policies of various regulatory authorities. In particular, the Federal Reserve regulates monetary policy and interest rates in order to influence general economic conditions. These policies have a significant influence on overall growth and distribution of loans, investments and deposits and affect interest rates charged on loans or paid for deposits. Federal Reserve monetary policies have had a significant effect on the operating results of all financial institutions in the past and may continue to do so in the future.

An investment in our common shares is subject to risks inherent to our business. Before making an investment decision, you should carefully consider the risks and uncertainties described below together with all of the other information included or incorporated by reference in this report. The value of our common shares could decline due to any of these risks, and you could lose all or part of your investment.

Our allowance for loan losses may not be adequatebusiness is dependent upon the willingness and ability of our customers to cover actual loan losses.

Disruptions to our customers could result in increased risk of delinquencies, defaults, foreclosures and losses on our loans as well as declines in wealth management revenues. The escalation of the pandemic may also negatively impact regional economic conditions for a period of time, resulting in declines in local loan demand, liquidity of loan guarantors, loan collateral (particularly in real estate), loan originations and deposit availability. If the global response to contain COVID-19 escalates or is unsuccessful, we could experience a material adverse effect on our business, financial condition, results of operations and cash flows.

We are continuing to monitor the COVID-19 pandemic and related risks, although the rapid development and fluidity of the situation precludes any specific prediction as to its ultimate impact on us. However, if the COVID-19 outbreak continues to spread or otherwise results in a continuation or worsening of the current economic and commercial environments, our business, financial condition, and results of operations.

The Company is concentrateda participating lender in the PPP, a loan program administered through the SBA, that was created to help eligible businesses, organizations and self-employed persons fund their operational costs during the COVID-19 pandemic. Under this program, the SBA guarantees 100% of the amounts loaned under the PPP. The PPP opened on April 3, 2020 and was extended in January 2021; however, because of the short window between the passing of the CARES Act and the initial opening of the PPP, there is some ambiguity in the laws, rules and guidance regarding the operation of the PPP, which exposes the Company to risks relating to noncompliance with the PPP. For instance, other financial institutions have experienced litigation related to their process and procedures used in processing applications for the PPP. Any financial liability, litigation costs or reputational damage caused by PPP related litigation could have a material adverse impact on our business, financial condition and results of operations. In addition, the Company may be exposed to credit risk on PPP loans if a determination is made by the SBA that there is a deficiency in the manner in which the loan was originated, funded, or serviced. If a deficiency is identified, the SBA may deny its liability under the guaranty, reduce the amount of the guaranty, or, if it has already paid under the guaranty, seek recovery of any loss related to the deficiency from the Company.

Our operations are subject to extensive regulation by federal, state and local governmental authorities and are subject to various laws and judicial and administrative decisions imposing requirements and restrictions on part or all of our operations. Banking regulations are primarily intended to protect depositors’ funds, federal deposit insurance funds and the banking system as a whole, rather than shareholders. Because our business is highly regulated, the laws, rules, regulations and supervisory guidance and policies applicable to us are subject to regular modification and change and could result in increased credit risk.an adverse impact on our results of operations.

The CRA, the Equal Credit Opportunity Act, the Fair Housing Act and other fair lending laws and regulations impose nondiscriminatory lending requirements on financial institutions. The CFPB, the U.S. Department of Justice and other federal agencies are responsible for enforcing these laws and regulations. A majoritysuccessful regulatory challenge to an institution’s performance under the CRA or fair lending laws and regulations could result in a wide variety of our loans aresanctions, including damages and civil money penalties, injunctive relief, restrictions on mergers and acquisitions activity, restrictions on expansion, and restrictions on entering new business lines. Private parties may also have the ability to businesses and individualschallenge an institution’s performance under fair lending laws in the St. Louis, Kansas City, Phoenix, Los Alamos, Albuquerque and Santa Fe metropolitan areas. The regional economic conditions in areas where we conductprivate class action litigation. Such actions could have a material adverse effect on our business, havefinancial condition, results of operations and future prospects.

The Bank Secrecy Act, the USA PATRIOT Act of 2001, and other laws and regulations require financial institutions, among other duties, to institute and maintain an impact oneffective anti-money laundering program and file suspicious activity and currency transaction reports when appropriate. In addition to other bank regulatory agencies, the demandfederal Financial Crimes Enforcement Network of the Department of the Treasury is authorized to impose significant civil money penalties for our productsviolations of those requirements and serviceshas recently engaged in coordinated enforcement efforts with the state and federal banking regulators, as well as the U.S. Department of Justice, CFPB, Drug Enforcement Administration, and Internal Revenue Service. We are also subject to increased scrutiny of compliance with the rules enforced by the Office of Foreign Assets Control of the Department of the Treasury regarding, among other things, the prohibition of transacting business with, and the need to freeze assets of, certain persons and organizations identified as a threat to the national security, foreign policy or economy of the United States. If our policies, procedures and systems are deemed deficient, we would be subject to liability, including fines and regulatory actions, which may include restrictions on our ability to pay dividends and the necessity to obtain regulatory approvals to proceed with certain aspects of our clients to repay loans, the value of the collateral securing loans, and the stability of our deposit funding sources. Consequently, a decline in local economic conditions may adversely affect our earnings.

serious reputational consequences for continued efforts to increase our assets invested in commercial loans. Our commercial loans include loans that are secured by real estate (commercial property, multi-family residential property, 1-4 family residential property, and construction and land). Commercial loans generally involve a higher degreeus. Any of credit risk than residential mortgage loans due, in part, to their larger average size and less marketable collateral. In addition, unlike residential mortgage loans, commercial loans generally depend on the cash flow of the borrower’s business to service the debt. Adverse economic conditions or other factors affecting our target markets maythese results could have a greatermaterial adverse effect on us thanour business, financial condition, results of operations and future prospects.

Under federal and state laws and regulations pertaining to the safety and soundness of insured depository institutions, the Missouri Division of Finance, the Federal Reserve Board, and the FDIC have the authority to compel or restrict certain actions if the Company’s or the Bank’s capital should fall below adequate capital standards as a result of future operating losses, or if its bank regulators determine that it has insufficient capital. Among other matters, the corrective actions include but are not limited to requiring affirmative action to correct any conditions resulting from any violation or practice; directing an increase in capital and the maintenance of specific minimum capital ratios; restricting the Bank’s operations; limiting the rate of interest the bank may pay on otherbrokered deposits; restricting the amount of distributions and dividends and payment of interest on its trust preferred securities; requiring the Bank to enter into informal or formal enforcement orders, including memoranda of understanding, written agreements and consent or cease and desist orders to take corrective action and enjoin unsafe and unsound practices; removing officers and directors and assessing civil monetary penalties; and taking possession of and closing and liquidating the Bank. These actions may limit the ability of the Bank or Company to execute its business plan and thus can lead to an adverse impact on the results of operations or financial institutionsposition.

We maintain an allowance for credit losses, which is a reserve established through a provision for credit losses charged to expense, that have a more diversified client base. Increasesrepresents management’s estimate of probable losses within the existing portfolio of loans. The allowance, in non-performing commercial loans couldthe judgment of management, is sufficient to reserve for estimated credit losses and risks inherent in the loan portfolio. We continue to monitor the adequacy of our loan credit allowance and may need to increase it if economic conditions deteriorate. In addition, bank regulatory agencies periodically review our allowance for credit losses and may require an increase in the provision for credit losses or the recognition of further loan charge-offs, based on judgments that can differ somewhat from those of our own management. In addition, if charge-offs in future periods exceed the allowance for loan losses (i.e., if the loan allowance is inadequate), we may need additional credit loss provisions to increase the allowance for loan losses. Additional provisions to increase the allowance for credit losses, should they become necessary, would result in operating losses, impaired liquiditya decrease in net income and erosion of oura reduction in capital, and couldmay have a material adverse effect on our financial condition and results of operations. Credit market tightening could adversely affect our commercial borrowers through declines in their business activities and adversely impact their overall liquidity through the diminished availability of other borrowing sources or otherwise.

On July 27, 2017, the United Kingdom’s Financial Conduct Authority, which regulates the LIBOR, announced that it intends to stop persuading or compelling banks to submit rates for the calculation of LIBOR after 2021. The announcement indicates that the continuation of LIBOR on the current basis cannot and will not be guaranteed after 2021. It is impossible to predict whether and to what extent banks will continue to provide LIBOR submissions to the administrator of LIBOR, whether LIBOR rates will cease to be published or supported before or after 2021 or whether any additional reforms to LIBOR may be enacted in the United Kingdom or elsewhere. Efforts in the United States to identify a set of alternative U.S. dollar reference interest rates include proposals by the ARRC of the Federal Reserve Board and the Federal Reserve Bank of New York. Uncertainty as to the nature of alternative reference rates and as to potential changes in other reforms to LIBOR may adversely affect LIBOR rates and the value of LIBOR-based loans, and to a lesser extent securities in our portfolio, and may impact the availability and cost of hedging instruments and borrowings, including the rates we pay on our subordinated debentures. The Company has material contracts that are indexed to LIBOR. If LIBOR rates are no longer available, any successor or replacement interest rates may perform differently and we may incur significant costs to transition both our borrowing arrangements and the loan agreements with our customers from LIBOR, which may have an adverse effect on our results of operations. The impact of alternatives to LIBOR on the valuations, pricing and operation of our financial instruments is not yet known.

A portion of our portfolio is secured by real estate, and thus we face a high degree of risk from a downturn in our real estate markets. If real estate values would decline in our markets, our ability to recover on defaulted loans for which

Additionally, Kansas and Arizona havethe state-specific foreclosure laws thatof the jurisdictions in which our real estate collateral is located may hinder our ability to timely or fully recover on defaulted loans secured by property in theircertain states. KansasFor example, some states in which our collateral is alocated are judicial foreclosure state, thereforestates. In judicial foreclosure states, all foreclosures must be processed through the Kansas state courts.court system. Due to this process, it takes approximately onemay take up to a year or longer to foreclose on real estate collateral located in the State of Kansas.those states. Our ability to recover on defaulted loans secured by Kansas property in those states may be delayed and our recovery efforts are lengthened due to this process. Arizona has anIn addition, other states have anti-deficiency statutestatutes with regards to certain types of residential mortgage loans. Our ability to recover on defaulted loans secured by residential mortgages in anti-deficiency statute states may be limited to the fair value of the real estate securing the loan at the time of foreclosure.

Cash flow lending involves lending money to a client based primarily on the expected cash flow, profitability and enterprise value of a client, with the value of any tangible assets as secondary protection. In some cases, these loans may have more leverage than traditional bank debt. In the case of our senior cash flow loans, we generally take a lien on substantially all of a client’s assets, but the value of those assets is typically substantially less than the amount of money we advance to the client under a cash flow transaction. In addition, some of our cash flow loans may be viewed as stretch loans, meaning they may be at leverage multiples that exceed traditional accepted bank lending standards for senior cash flow loans. Thus, if a cash flow transaction becomes non-performing, our primary recourse to recover some or all of the principal of our loan or other debt product would be to force the sale of all or part of the company as a going concern. Additionally, we may obtain equity ownership in a borrower as a means to recover some or all of the principal of our loan. The risks inherent in cash flow lending include, among other things:

Additionally, many of our clients use the proceeds of our cash flow transactions to make acquisitions. Poorly executed or poorly conceived acquisitions can burden management, systems and the operations of the existing business, causing a decline in both the client’s cash flow and the value of its business as a going concern. In addition, many acquisitions involve new management teams taking over day-to-day operations of a business. These new management teams may fail to execute at the same level as the former management team, which could reduce the cash flow of the client available to service the loan or other debt product, as well as reduce the value of the client as a going concern.

One of the specialized products we offer is financing whole life insurance premiums utilized in high net worth estate planning. These loans are primarily secured by the insurance policies financed by the loans, i.e., the obligations of the life insurance providers under those policies. Nationally Recognized Statistical Rating Organizations (“NRSROs”) such as Standard & Poor’s, Moody’s and A.M. Best evaluate the life insurance providers that are the payors on the life insurance policies that we finance. The value of our collateral could be materially impaired in the event there are widespread financial difficulties among life insurance providers or the NRSROs downgrade the financial strength ratings or credit ratings of the life insurance providers, indicating the NRSROs’ opinion that the life insurance provider’s ability to meet policyholder obligations is impaired, or the ability of the life insurance provider to meet the terms of its debt obligations is impaired. The value of our collateral is also subject to the risk that a life insurance provider could become insolvent. In particular, if one or more large nationwide life insurance providers were to fail, the value of our portfolio could be significantly negatively impacted. A significant downgrade in the value of the collateral supporting

Construction, land acquisition and development lending involves additional risks because funds are advanced based upon the projected value of the project, which is inherently uncertain prior to the project’s completion. Because of the uncertainties inherent in estimating construction costs, as well as the fair value of the completed project and the effects of governmental regulation of real property and the general effects of the national and local economies, it is relatively difficult to evaluate accurately the total funds required to complete a project and the related loan-to-value

ratio. As a result, construction loans often involve the disbursement of substantial funds with repayment dependent, in part, on the success of the ultimate project and the ability of the borrower to sell or lease the property, rather than the ability of the borrower or guarantor to repay principal and interest. If our appraisal of the value of the completed project proves to be overstated, we may have inadequate security for the repayment of the loan upon completion of construction of the project. If we are forced to foreclose on a project prior to or at completion due to a default, there can be no assurance that we will be able to recover all of the unpaid balance of, and accrued interest on, the loan or the related foreclosure, sale and holding costs. In addition, we may be required to fund additional amounts to complete the project and may have to hold the property for an unspecified period of time. If any of these events occur, our financial condition, results of operations and cash flows could be materially and adversely affected.

The loans we make to our borrowers may bear interest at a variable or floating interest rate. When market interest rates increase, the amount of revenue borrowers need to service their debt also increases. Some borrowers may be unable to make their debt service payments. As a result, an increase in market interest rates will increase the risk of loan default. An increase in non-performing loans could result in a net loss of earnings from these loans, an increase in the level of problem agriculture loansprovision for loan and potentially result in additional provisions to increase our allowance forcovered loan losses, and may have a material adverse effect on our financial condition and results of operations. The imposition of tariffs and retaliatory tariffs or other trade restrictions on agriculture products and materials that our customers import or export, could negatively impact our customers, their financial results and ability to service debt, which,an increase in turn, could adversely affect our financial condition and results of operations.

We participate in and have previously been an “Allocatee” of the New Markets Tax Credit Program of the U.S. Department of the Treasury Community Development Financial Institutions Fund. Through this program, we provide our allocation to certain projects, which in turn for an equity investment from an Investor in the project generate federal tax credits to those investors. This equity, coupled with any debt or equity from the project sponsor is in turn invested in a certified community development entity for a period of at least seven years. Community development entities must use this capital to make loans to, or other investments in, qualified businesses in low-income communities in accordance with New Markets Tax Credit Program criteria. Investors receive an overall tax credit equal to 39% of their total equity investment, credited at a rate of five percent in each of the first three years and six percent in each of the final four years. However, after the exhaustion of all cure periods and remedies, the entire credit is subject to recapture if the certified community development entity fails to maintain its certified status, or if substantially all of the equity investment proceeds associated with the tax credits we allocate are no longer continuously invested in a qualified business that meets the New Markets Tax Credit Program criteria, or if the equity investment is redeemed prior to the end of the minimum seven-year term. As part of these financing transactions, we as the parent to Enterprise Financial CDE, LLC (“CDE”), provide customary indemnities to the tax credit investors, which require us to indemnify and hold harmless the investors in the event a credit recapture event occurs, unless the recapture is a result of action or inaction of the investor. No assurance can be given that these counterparties will not call upon us to discharge these obligations in the circumstances under which they are owed.

If this were to occur, the amount we may be required to pay a bank investor could be substantial and could have a material adverse effect on our results of operations and financial condition.

Because we have been designated as an “Allocatee” under the New Markets Tax Credit Program, we are required to provide allocation fund qualifying projects under the New Markets Tax Credit Program, and we are responsible for monitoring those projects, ensuring their ongoing compliance with the requirements of the New Markets Tax Credit Program and satisfying the various recordkeeping and reporting requirements under the New Markets Tax Credit Program. If we default in our obligations under the New Markets Tax Credit Program, the U.S. Department of the Treasury may revoke our participation in any other CDFI Fund programs, reallocate the new market tax credits that were originally allocated to us, and take any other remedial actions that it is empowered to take under the Allocation Agreement they have entered into with us with respect to the New Markets Tax Credit Program, with the full range of such remedies being unknown. If we were to default under the New Markets Tax Credit Program, we could suffer negative publicity in the communities in which we operate, and we could face greater scrutiny from federal and state bank regulators, especially with regard to our compliance with the CRA. These developments could have a material adverse impact on our reputation, business, financial condition, results of operations and liquidity.

Liquidity is essential to our business. We are a holding company and depend on our subsidiaries for liquidity needs, including debt coverage requirements. An inability to raise funds through deposits, borrowings, the sale of investment securities and other sources could have a substantial material adverse effect on our liquidity. Our access to funding sources in amounts that are adequate to finance our activities could be impaired by factors that affect us specifically

Since our inception, we have utilized both brokered and non-brokered deposits as a source of funds to support our growing loan demand and other liquidity needs. As a bank regulatory supervisory matter, reliance upon brokered deposits as a significant source of funding is discouraged. Brokered deposits may not be as stable as other types of deposits, and, in the future, those depositors may not renew their deposits when they mature, or we may have to pay a higher rate of interest to keep those deposits or may have to replace them with other deposits or with funds from other sources. Additionally, if the Bank ceases to be categorized as “well-capitalized” for bank regulatory purposes, it would not be able to accept, renew or roll over brokered deposits without a waiver from the FDIC. Our inability to maintain or replace these brokered deposits as they mature could adversely affect our liquidity and results of operations. Further, paying higher interest rates to maintain or replace these deposits could adversely affect our net interest margin and results of operations.

We use interest rate swaps to help manage our interest rate risk in our banking business from recorded financial assets and liabilities when they can be demonstrated to effectively hedge a designated asset or liability and the asset or liability exposes us to interest rate risk or risks inherent in client related derivatives. We may use other derivative financial instruments to help manage other economic risks, such as liquidity and credit risk, including exposures that arise from business activities that result in the receipt or payment of future known or uncertain cash amounts, the value of which are determined by interest rates. We also have derivatives that result from a service we provide to

certain qualifying clients approved through our credit process, and therefore, these derivatives are not used to manage interest rate risk in our assets or liabilities. The Company does not enter into derivative financial instruments for trading purposes. Hedging interest rate risk is a complex process, requiring sophisticated models and routine monitoring. As a result of interest rate fluctuations, hedged assets and liabilities will appreciate or depreciate in market value. The effect of this unrealized appreciation or depreciation will generally be offset by income or loss on the derivative instruments that are linked to the hedged assets and liabilities. By engaging in derivative transactions, we are exposed to credit and market risk. If the counterparty fails to perform, credit risk exists to the extent of the fair value gain in the derivative. Market risk exists to the extent that interest rates change in ways that are significantly different from what we expected when we entered into the derivative transaction. The existence of credit and market risk associated with our derivative instruments could adversely affect our net interest income and, therefore, could have a material adverse effect on our business, financial condition, results of operations and future prospects.

The financial services industry, including but not limited to, commercial banking, mortgage banking, consumer lending, and home equity lending, is highly competitive, and we encounter strong competition for deposits, loans, and other financial services in all of our market areas in each of our lines of business. Our principal competitors include other commercial banks, savings banks, savings and loan associations, mutual funds, money market funds, finance companies, trust companies, technology companies, insurers, credit unions, and mortgage companies among others. Many of our non-bank competitors are not subject to the same degree of regulation as us and have advantages over us in providing certain services. Many of our competitors are significantly larger than we are and have greater access to capital and other resources. Also, our ability to compete effectively in our business is dependent on our ability to adapt successfully to regulatory and technological changes within the banking and financial services industry, generally. If we are unable to compete effectively, we will lose market share and our income from loans and other products may diminish.

Our ability to compete successfully depends on a number of factors, including, among other things:

Failure to perform in any of these areas could significantly weaken our competitive position, and could adversely affect our growth and profitability, which, in turn, could have a material adverse effect on our financial condition and results of operations.

The acquisition of other financial services companies or assets present risks to the Company in addition to those presented by the nature of the business acquired. Our earnings, financial condition, and prospects after a merger or acquisition depend in part on our ability to successfully integrate the operations of the acquired company. We may be unable to integrate operations successfully or to achieve expected results or cost savings.

We periodically evaluate merger and acquisition opportunities and conduct due diligence activities related to possible transactions with other financial institutions and financial services companies. As a result, merger or acquisition discussions and, in some cases, negotiations may take place, and future mergers or acquisitions involving cash, debt or equity securities may occur at any time. In addition to the risks noted above, potential acquisitions may incur additional costs for diligence or break-up fees, even if the transaction is not consummated.

From time to time, we may implement other new lines of business or offer new products or services within existing lines of business. There can be substantial risks and uncertainties associated with these efforts, particularly in instances where the markets are not fully developed. Although we continue to expend substantial managerial, operating and financial resources as our business grows, we may be unable to successfully continue the integration of new business lines, and price and profitability targets may not prove feasible. External factors such as compliance with regulations, competitive alternatives and shifting market preferences, may also impact the successful implementation of a new line of business or a new product or service. Furthermore, any new line of business and new product or service could have a significant impact on the effectiveness of our system of internal controls. Failure to successfully manage these risks in the development and implementation of new lines of business or new products or services could have a material adverse effect on our business, financial condition and results of operations.

We are subjectheadquartered in Missouri, but have branch locations in the Kansas City, Phoenix, and San Diego metropolitan areas, as well as Northern New Mexico and Nevada. Over time, we may acquire or open locations in

other parts of the United States as well. In the course of these expansion activities, we may encounter significant risks, including unfamiliarity with the characteristics and business dynamics of new markets, increased marketing and administrative expenses and operational difficulties arising from our efforts to numerous laws designed to protect consumers, including the CRA and fair lending laws, and failure toattract business in new markets, manage operations in noncontiguous geographic markets, comply with these laws could lead to a wide variety of sanctions.

As a financial institution, our operations rely heavily on the secure processing, storage and transmission of confidential and other information on our computer systems and networks. Any failure, interruption or breach in security or operational integrity of these systems could result in failures or disruptions in our internet banking system, treasury management products, check and document imaging, remote deposit capture systems, general ledger, and other systems. The security and integrity of our systems could be threatened by a variety of interruptions or information security breaches, including those caused by computer hacking, cyber-attacks, electronic fraudulent activity or attempted theft of financial assets.  We cannot assure any such failures, interruption or security breaches will not occur, or if they do occur, that they will be adequately addressed. While we have certain protective policies and procedures in place, the nature and sophistication of the threats continue to evolve. We may be required to expend significant additional resources in the future to modify and enhance our protective measures. Additionally, we face the risk of operational disruption, failure, termination or capacity constraints of any of the third parties that facilitate our business activities, including exchanges, clearing agents, clearing houses or other financial intermediaries. Such parties could also be the source of an attack on, or breach of, our operational systems. Any failures, interruptions or security breaches in our information systems could damage our reputation, result in a loss of client business, result in a violation of privacy or other laws, or expose us to civil litigation, regulatory fines or losses not covered by insurance.

We rely heavily on third-party service providers for much of our communications, information, operating and financial control systems technology, including relationship management, mobile banking, general ledger, investment, deposit, loan servicing and loan origination systems. While we have selected these third-party vendors carefully and perform ongoing monitoring, we do not control their actions. Any problems caused by these third parties, including as a result of inadequate or interrupted service, could adversely affect our ability to deliver products and services to our clients and otherwise conduct our business. Financial or operational difficulties of a third-party vendor could also hurt our operations if those difficulties interfere with the vendor’s ability to serve us, and replacing these third-party vendors

The trading price of our common stock may fluctuate widely as a result of a number of factors, many of which are outside our control. In addition, the stock market is subject to fluctuations in the share prices and trading volumes that affect the market prices of the shares of many companies. These broad market fluctuations could make it more difficult for you to resell your common stock when you want and at prices you find attractive.

Our stock price can fluctuate significantly in response to a variety of factors including, among other things:

The stock market and, in particular, the market for financial institution stocks, has historically experienced significant volatility. As a result, the market price of our common stock may be volatile. In addition, the trading volume in our common stock may fluctuate more than usual and cause significant price variations to occur. The trading price of the shares of our common stock and the value of our other securities will depend on many factors, which may change from time to time, including, without limitation, our financial condition, performance, creditworthiness and prospects, future sales of our equity or equity related securities, and other factors identified in this annual report and other reports by the Company. In some cases, the markets have produced downward pressure on stock prices and credit availability for certain issuers without regard to those issuers’ underlying financial strength or operating results. A significant decline in our stock price could result in substantial losses for individual shareholders and could lead to costly and disruptive securities litigation.

Although our common stock is listed for trading on the Nasdaq Global Select Market, its trading volume may be less than that of other, larger financial services companies. A public trading market having the desired characteristics of depth, liquidity and orderliness depends on the presence in the marketplace of willing buyers and sellers of our common stock at any given time, a factor over which we have no control. During any period of lower trading volume of our

An investment in our common stock is not a savings account, deposit or other obligation of our bank subsidiary, any non-bank subsidiary or any other bank, and such investment is not insured or guaranteed by the FDIC or any other governmental agency. As a result, if you acquire our common stock, you may lose some or all of your investment.

Holders of our common stock are entitled to receive dividends only when, as and if declared by the Board of Directors. Although we have historically paid cash dividends on our common stock, we are not required to do so.

We have outstanding subordinated debentures issued to statutory trust subsidiaries, which have issued and sold preferred securities in the Trusts to investors.

If we are unable to make payments on any of our subordinated debentures for more than 20 consecutive quarters, we would be in default under the governing agreements for such securities and the amounts due under such agreements would be immediately due and payable. Additionally, if for any interest payment period we do not pay interest in respect of the subordinated debentures (which will be used to make distributions on the trust preferred securities), or if for any interest payment period we do not pay interest in respect of the subordinated debentures, or if any other event of default occurs, then we generally will be prohibited from declaring or paying any dividends or other distributions, or redeeming, purchasing or acquiring, any of our capital securities, including the common stock, during the next succeeding interest payment period applicable to any of the subordinated debentures, or next succeeding interest payment period, as the case may be.

Moreover, any other financing agreements that we enter into in the future may limit our ability to pay cash dividends on our capital stock, including the common stock. In the event that our existing or future financing agreements restrict our ability to pay dividends in cash on the common stock, we may be unable to pay dividends in cash on the common stock unless we can refinance amounts outstanding under those agreements. In addition, if we are unable or determine

Provisions of Delaware law and of our certificate of incorporation, as amended, and bylaws, as well as various provisions of federal and Missouri state law applicable to bank and bank holding companies, could make it more difficult for a third party to acquire control of us or have the effect of discouraging a third party from attempting to acquire control of us. We are subject to Section 203 of the Delaware General Corporation Law, which would make it more difficult for another party to acquire us without the approval of our Board of Directors. Additionally, our certificate of incorporation, as amended, authorizes our Board of Directors to issue preferred stock which could be issued as a defensive measure in response to a takeover proposal. In the event of a proposed merger, tender offer or other attempt to gain control of the Company, our Board of Directors would have the ability to readily issue available shares of preferred stock as a method of discouraging, delaying or preventing a change in control of the Company. Such issuance could occur regardless of whether our shareholders favorably view the merger, tender offer or other attempt to gain control of the Company. These and other provisions could make it more difficult for a third party to acquire us even if an acquisition might be in the best interests of our shareholders. Although we have no present intention to issue any shares of our authorized preferred stock, there can be no assurance that the Company will not do so in the future.

Our executive offices are located at 150 North Meramec Avenue, Clayton, Missouri, 63105. As of December 31, 2019,2020, we had 19 banking locations, and three limited service facilities in the St. Louis metropolitan area, seven banking locations in the Kansas City metropolitan area, two banking locations in the Phoenix metropolitan area, and six banking locations in New Mexico.Mexico, four banking locations in the San Diego metropolitan area, and one banking location in the Las Vegas metropolitan area. Additionally, the Company has a limited network of SBA loan production offices and deposit production offices in various states. We own or lease our facilities and believe all of our properties are in good condition to meet our business needs.

The Company and its subsidiaries are, from time to time, parties to various legal proceedings arising out of their businesses. Management believes that there are no such legal proceedings pending or threatened against the Company or its subsidiaries in the ordinary course of business, directly, indirectly, or in the aggregate that, 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.

For more information on our legal proceedings, see “Item 8. Note 14 – Litigation and Other Contingencies” in this report.

The Company’s common stock trades on the Nasdaq Global Select Market under the symbol “EFSC.” As of February 19, 2020,17, 2021, the Company had 1,4141,480 registered shareholders of common stock. The number of holders of record does not represent the actual number of beneficial owners of our common stock because securities dealers and others frequently hold shares in “street name” for the benefit of individual owners who have the right to vote shares.

The holders of shares of our common stock are entitled to receive dividends when declared by our Board of Directors out of funds legally available for the purpose of paying dividends. Our Board of Directors approved the Company’s quarterly dividend of $0.18 per common share for the first quarter of 2020, an increase from $0.17 for the prior quarter,2021, payable on March 31, 20202021 to shareholders of record as of March 16, 2020.15, 2021. We anticipate continuing a regular quarterly cash dividend. However, we have no obligation to pay dividends and we may change our dividend policy at any time without notice to our shareholders.

Our ability to pay dividends is substantially dependent upon the ability of our subsidiaries to pay cash dividends to us. Information on regulatory restrictions on our ability to pay dividends is set forth in “Part I, Item 1. Business - Supervision and Regulation - Financial Holding Company - Dividend Restrictions.” The amount of dividends, if any, that may be declared by the Company also depends on many other factors, including future earnings, bank

regulatory capital requirements and business conditions as they affect the Company and its subsidiaries. As a result, no assurance can be given that dividends will be paid in the future with respect to our common stock.

For more information on our equity compensation plans, see “Item 8. Note 16 – Stockholders’ Equity and Compensation Plans” and “Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters” in this report, which are incorporated herein by reference.

None.

Non-core acquired loans were those acquired from the FDIC and were previously covered by shared-loss agreements. These loans are accounted for as purchased credit impaired loans. The following table presents, for the periods indicated, certain information related to our average interest-earning assets and interest-bearing liabilities, as well as, the corresponding interest rates earned and paid, all on a tax equivalent basis.