X0508 4 2025-06-26 0001025835 ENTERPRISE FINANCIAL SERVICES CORP EFSC 0001674404 LALLY JAMES BRIAN 150 N. MERAMEC CLAYTON MO 63105 1 1 CEO 1 Common Stock 2025-06-26 4 S 0 1828 55.16 D 100885 D Common Stock 18535 I 401 (K) Plan Common Stock 4107 D Non Qualified Stock Option (Right to Buy) 43.81 2024-02-06 2031-02-25 Common Stock 17637 17637 D Non Qualified Stock Option (Right to Buy) 48.34 2032-02-24 Common Stock 20325 20325 D Non Qualified Stock Option (Right to Buy) 54.46 2033-02-28 Common Stock 20438 20438 D Non Qualified Stock Option (Right to Buy) 39.50 2034-02-28 Common Stock 30661 30661 D Non Qualified Stock Option (Right to Buy) 57.17 2035-03-04 Common Stock 16144 16144 D Restricted Share Units Common Stock 4176 4176 D Restricted Share Units Common Stock 5857 5857 D Restricted Share Units Common Stock 5398 5398 D Restricted Share Units Common Stock 15964 15964 D The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $55.00 to $55.80. The reporting person undertakes to provide the Company, any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. These securities are represented by units held in a unitized stock fund through the Company's 401(k) Plan. The unitized stock fund consists of cash and common stock in amounts that vary from time to time. These shares are held jointly with spouse. This option becomes exercisable in the first quarter of 2025, subject to continued employment by the reporting person. 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 option becomes exercisable in the first quarter of 2028, 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 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 RSU's vest 100% in the first quarter of 2028, subject to continued employment by the reporting person. The RSUs vest over six years in one-third installments on each of February 24, 2024, February 24, 2026, and February 24, 2028. Vesting is subject to continued employment of the reporting person. On each vesting date, for each RSU vesting on such date, the reporting person will receive one share of Common Stock. /s/James Brian Lally 2025-06-27