X0306 4 2021-01-28 0001018399 ENTERPRISE BANCORP INC /MA/ EBTC 0001670467 Covey Susan C/O ENTERPRISE BANCORP, INC. 222 MERRIMACK STREET LOWELL MA 01852 1 EVP-Principal Subsidiary Common Stock 2021-01-28 4 F 0 59 25.87 D 7379.6138 D Includes 57.4592 shares acquired through dividend reinvestment on 6/1/20. Includes 58.4411 shares acquired through dividend reinvestment on 9/1/20. Includes 50.0197 shares acquired through dividend reinvestment on 12/1/20. /s/ John P. Clancy, Jr., attorney-in-fact for Susan Covey 2021-02-01