Summary of ENTERPRISE BANCORP INC /MA/

Item 5.02. Departure of Directors or Principal Officers; Election of Directors; Appointment of Principal Officers; Compensatory Arrangements of Certain Officers

(d) Effective February 21, 2013, in accordance with authority provided under the By-Laws of Enterprise Bancorp, Inc. (the "Company") and of its wholly owned subsidiary, Enterprise Bank and Trust Company (the "Bank"), John T. Grady, Jr. accepted his appointment by a vote adopted jointly by the Board of Directors of both entities and became a member of the Board of Directors of both the Company and the Bank. Mr. Grady was elected to the class of directors whose term expires in 2015.

Mr. Grady is a Senior Advisor at Moelis & Company, a global investment company with offices in Boston and New York. Mr. Grady has over 25 years of experience in financial services in senior positions across asset management, private wealth management and banking. He was most recently a Managing Director and Head of New Business Development at Athena Capital, an investment management firm based outside Boston. Previously, Mr. Grady was at Lehman Brothers where he was the Managing Director responsible for the investment Management Division in New England. Mr. Grady also spent 14 years at State Street Global Advisors where he was a Managing Director in the Global Private Client Group, a member of State Street Corporation's Executive Operating Group and was responsible for institutional sales, client service, consultant relations and charitable asset management. Mr. Grady holds a B.A. from Boston University. Mr. Grady serves as a director of Bank of Cape Cod and its publicly traded holding company, New England Bancorp, Inc. He serves on the Board of Directors of South Shore Hospital and Partner's Healthcare and is a member of the Corporation of the Brigham and Women's Hospital. He is also a member of the Boston University Athletic Directors Council, the Corporation of the Isabella Stewart Gardner Museum and is a Trustee of the Belmont Hill School.

Mr. Grady does not have any arrangement or understanding with any other person pursuant to which such newly elected director has been elected to the Board of Directors of the Company and the Bank.

Mr. Grady has not entered into, or become eligible to participate in, any material plan, contract or arrangement with or offered by the Company or the Bank in connection with such newly elected director having been elected to the Board of Directors, other than eligibility to receive fees in the ordinary course for services as a director, and there has not been any grant or award of any equity or other compensation made by the Company or the Bank to Mr. Grady as a result of such newly elected director's election to the Board.

Mr. Grady has not been appointed to any Board committees as of the date of this report, and neither the Company nor the Bank has yet identified any Board committees to which Mr. Grady is expected to be appointed to as of this time. A copy of the press release is attached as Exhibit 99.1 and is incorporated herein by reference.