X0508 4 2024-06-03 0001025835 ENTERPRISE FINANCIAL SERVICES CORP EFSC 0001283697 DUMLAO TROY 150 N. MERAMEC ST LOUIS MO 63105 1 EVP, Chief Accounting Officer 0 Common Stock 2024-06-03 5 J 0 E 604 32.40 A 6299 D Depository Shares 400 D Non Qualified Stock Option (Right to Buy) 43.81 2031-02-25 Common Stock 1058 1058 D Non Qualified Stock Option (Right to Buy) 48.34 2032-02-24 Common Stock 1266 1266 D Non Qualified Stock Option (Right to Buy) 54.46 2033-02-28 Common Stock 1769 1769 D Non Qualified Stock Option (Right to Buy) 39.50 2034-02-28 Common Stock 2722 2722 D Restricted Share Units Common Stock 244 244 D Restricted Share Units Common Stock 361 361 D Restricted Share Units Common Stock 520 520 D Restricted Share Units Common Stock 761 761 D The reporting person is voluntarily reporting the acquisition of shares of the Issuer's common stock pursuant to the Issuer's 2018 Employee Stock Purchase Plan ("ESPP") for the ESPP purchase period of December 1, 2023, through May 31, 2024. This transaction is exempt under Section 16b-3(c). In accordance with the terms of the ESPP, the reported shares were acquired based on 85% of the closing price of the Issuer's common stock on June 3, 2024. 1. Each Depositary Share represents a 1/40th interest in a share of the Issuer's 5.00% Series A Fixed-Rate Non-Cumulative Perpetual Preferred Stock. Depositary Shares were purchased in an underwritten public offering. The Options vest at a rate of 33% annually over three years, subject to continued employment of the reporting person. Vesting occurs on the anniversary date of the grant each year, with final vest occurring on February 25, 2024 The Options vest at a rate of 33% annually over three years, subject to continued employment of the reporting person. Vesting occurs on the anniversary date of the grant each year, with final vest occurring on February 24, 2025. This option becomes exercisable in the first quarter of 2026, subject to continued employment by the reporting person. This option becomes exercisable in the first quarter of 2027, subject to continued employment by the reporting person. The RSU's were granted pursuant to the Company's 2018 Stock Incentive Plan. Each RSU represents the right to receive one share of Common Stock, subject to adjustment as provided in the Grant Agreement. The RSUs vest at a rate of 33% annually over three years, subject to continued employment of the reporting person. Vesting occurs on the anniversary date of the grant each year, with final vest occurring on February 24, 2025. On each vesting date, for each RSU vesting on such date, the reporting person will receive one share of Common Stock. The RSU vest 100% in the first quarter of 2026, subject to continued employment by the reporting person. The RSU's vest 100% in the first quarter of 2027, subject to continued employment by the reporting person. The RSUs vest at a rate of 33% annually over three years, subject to continued employment of the reporting person. Vesting occurs on the anniversary date of the grant each year, with final vest occurring on April 14, 2026. On each vesting date, for each RSU vesting on such date, the reporting person will receive one share of Common Stock. /s/ Troy Dumlao 2024-06-12