X0306 4 2020-11-30 0001025835 ENTERPRISE FINANCIAL SERVICES CORP EFSC 0001682456 BAUCHE DOUGLAS 150 N. MERAMEC CLAYTON MO 63105 1 Chief Credit Officer Common Stock 2020-11-30 5 J 0 E 287 24.72 A 7089 D Common Stock 2224 I 401(K) Plan Restricted Share Units Common Stock 337 337 D Restricted Share Units Common Stock 453 453 D Restricted Share Units Common Stock 557 557 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 June 1, 2020 through November 30, 2020. 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 1, 2020. The reporting person holds units in the stock fund and the number of shares reported as indirectly held in the 401 (k) plan in this row is an estimate of the number of shares of the issuer's Common Stock held in the unitized stock fund and allocated to the reporting person's account. 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's vest 100% in the first quarter of 2021, subject to continued employment by the reporting person. The RSU's vest 100% in the first quarter of 2022, subject to continued employment by the reporting person. The RSU's vest 100% in the first quarter of 2023, subject to continued employment by the reporting person. /s/ Douglas Bauche 2020-12-03