Common Contracts

MERIDIAN INTERSTATE BANCORP, INC. 11,557,500 Shares (subject to increase to 13,291,125 shares) COMMON SHARES (No Par Value) Subscription Price $10.00 Per Share AGENCY AGREEMENT November 13, 2007

Agency Agreement • November 27th, 2007 • Meridian Interstate Bancorp Inc • Savings institutions, not federally chartered • New York

• Contract Type
  Agency Agreement
• Filed
  November 27th, 2007
• Company
  Meridian Interstate Bancorp Inc
• Industry
  Savings institutions, not federally chartered
• Jurisdiction
  New York

Meridian Interstate Bancorp, Inc., a Massachusetts corporation (the “Company”), East Boston Savings Bank, a Massachusetts-chartered stock savings bank (the “Bank”), and Meridian Financial Services, Incorporated, a Massachusetts-chartered mutual holding company and the current sole stockholder of the Company (the “MHC”), hereby confirm their agreement with Keefe, Bruyette & Woods, Inc. (“Keefe Bruyette” or the “Selling Agent”) to serve as agent of the Company to assist the Company in the sale of up to 11,557,500 (subject to increase up to 13,291,125 shares) of Common Stock (as defined below) of the Company (the “Shares”) in the Subscription and Community Offerings, as defined below, and if necessary, a Syndicated Community Offering as follows:

MERIDIAN INTERSTATE BANCORP, INC. 11,557,500 Shares (subject to increase to 13,291,125 shares) COMMON SHARES ($.01 Par Value) Subscription Price $10.00 Per Share AGENCY AGREEMENT

Agency Agreement • November 7th, 2007 • Meridian Interstate Bancorp Inc • Savings institutions, not federally chartered • New York

• Contract Type
  Agency Agreement
• Filed
  November 7th, 2007
• Company
  Meridian Interstate Bancorp Inc
• Industry
  Savings institutions, not federally chartered
• Jurisdiction
  New York

Meridian Interstate Bancorp, Inc., a Massachusetts corporation (the “Company”), East Boston Savings Bank, a Massachusetts-chartered stock savings bank (the “Bank”), and Meridian Financial Services, Incorporated, a Massachusetts-chartered mutual holding company and the current owner of the Company (the “MHC”), hereby confirm their agreement with Keefe, Bruyette & Woods, Inc. (“Keefe Bruyette” or the “Selling Agent”) to serve as agent of the Company to assist the Company in the sale of up to 11,557,500 (subject to increase up to 13,291,125 shares) of Common Stock (as defined below) of the Company (the “Shares”) in the Subscription and Community Offerings, as defined below, and if necessary, a Syndicated Community Offering as follows: