X0508 4 2024-12-13 0001018399 ENTERPRISE BANCORP INC /MA/ EBTC 0001790673 Lussier Joseph R C/O ENTERPRISE BANCORP, INC. 222 MERRIMACK STREET LOWELL MA 01852 1 EVP & CFO 0 Common Stock 2024-12-13 4 A 0 58 42.75 A 14177.1015 D Shares awarded for 25th work anniversary. Includes 127.8666 shares acquired through dividend reinvestment on 06/2/24. Includes 104.3575 shares acquired through dividend reinvestment on 09/3/24. Includes 63.5218 shares acquired through dividend reinvestment on 12/2/24. /s/ Joseph R. Lussier 2024-12-16