efsc-20260727 0001025835 FALSE 150 N. Meramec Avenue St. Louis Missouri 63105 0001025835 2026-07-27 2026-07-27 0001025835 us-gaap:CommonStockMember 2026-07-27 2026-07-27 0001025835 efsc:DepositarySharesMember 2026-07-27 2026-07-27 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) July 27, 2026 ENTERPRISE FINANCIAL SERVICES CORP (Exact name of registrant as specified in its charter) Delaware 001-15373 43-1706259 (State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification No.) 150 N. Meramec Avenue , St. Louis , Missouri (Address of principal executive offices) 63105 (Zip Code) Registrant's telephone number, including area code ( 314 ) 725-5500 Not applicable (Former name or former address, if changed since last report) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act: Title of each class Trading Symbol(s) Name of each exchange on which registered Common Stock, par value $0.01 per share EFSC Nasdaq Global Select Market Depositary Shares, Each Representing a 1/40th Interest in a Share of 5.00% Fixed Rate Non-Cumulative Perpetual Preferred Stock, Series A EFSCP Nasdaq Global Select Market Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ Item 7.01 Regulation FD Disclosure. Enterprise Financial Services Corp (the "Company") is presenting the materials attached to this report as Exhibit 99.1 in meetings with certain investors and analysts. Information contained in Item 7.01 of this Current Report on Form 8-K, including Exhibit 99.1, shall not be deemed filed for the purposes of the Securities Exchange Act of 1934, as amended, nor shall such information and Exhibit be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such a filing. Item 9.01 Financial Statements and Exhibits. (d) Exhibits. Exhibit Number Description 99.1 Exhibit materials being presented in meetings with certain investors and analysts. These materials are being furnished pursuant to Item 7.01 herein. 104        The cover page of this Current Report on Form 8-K, formatted in Inline XBRL. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. ENTERPRISE FINANCIAL SERVICES CORP Date: July 27, 2026 By: /s/ Troy R. Dumlao Troy R. Dumlao Executive Vice President and Chief Accounting Officer

Enterprise Financial Services Corp disclosed investor and analyst presentation materials on July 27, 2026, demonstrating commitment to transparency and investor relations through ongoing stakeholder engagement.

Enterprise Financial Services Corp is presenting materials related to its business operations and performance in meetings with investors and analysts, as disclosed on July 27, 2026. This presentation aims to provide insights and updates on the Company's strategies and financial health. The information shared is critical for stakeholders to assess the Company’s current standing in the market and potential future growth. Attached materials, referenced as Exhibit 99.1, are integral to this communication, although they are not deemed filed under the Securities Exchange Act. The ongoing engagements indicate the Company's commitment to fostering transparency and building investor relations.

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