On September 15, 2020, in accordance with authority provided under the By-Laws of Enterprise Bancorp, Inc. (the “Company”) and its wholly owned subsidiary, Enterprise Bank and Trust Company (the “Bank”), the Board of Directors of each of the Company and the Bank approved an increase in the size of their respective Boards of Directors from 18 to 20 and appointed Nickolas Stavropoulos and Anita R. Worden to fill the resulting vacancies created by such increase, effective immediately. Mr. Stavropoulos was appointed to serve in the 2022 class of directors and Ms. Worden was appointed to serve in the 2023 class of directors. Mr. Stavropoulos and Ms. Worden will serve until the 2022 and 2023 annual stockholders’ meetings, respectively. As of the date of this Current Report on Form 8-K (this “Form 8-K”), neither Mr. Stavropoulos nor Ms. Worden have been appointed to any committees of the Boards of Directors of the Company or the Bank, and neither the Company nor the Bank has yet identified any committees to which Mr. Stavropoulos or Ms. Worden are expected to be appointed. Mr. Stavropoulos previously served as President and Chief Operating Officer of San Francisco-based Pacific Gas and Electric Company (PG&E). Ms. Worden previously served as the Co-Founder, Chief Executive Officer and Director of Yaskawa Solectria Solar (formerly Solectria Renewables, LLC).