Exhibit 99

Meridian Interstate Bancorp, Inc. Reports Net Income for the Fourth Quarter

and Year Ended December 31, 2013

Contact: Richard J. Gavegnano, Chairman and Chief Executive Officer

(978) 977-2211

Boston, Massachusetts (January 28, 2014): Meridian Interstate Bancorp, Inc. (the “Company” or “Meridian”) (NASDAQ: EBSB), the holding company for East Boston Savings Bank (the “Bank”), which also operates under the name Mt. Washington Bank, a Division of East Boston Savings Bank (“Mt. Washington”), announced net income of $4.0 million, or $0.18 per diluted share, for the quarter ended December 31, 2013, up from $2.1 million, or $0.10 per diluted share, for the quarter ended December 31, 2012. For the year ended December 31, 2013, net income was $15.4 million, or $0.70 per diluted share, up from $12.4 million, or $0.57 per diluted share, for the year ended December 31, 2012. The Company’s return on average assets was 0.60% for the quarter ended December 31, 2013, up from 0.38% for the quarter ended December 31, 2012. For the year ended December 31, 2013, the Company’s return on average assets was 0.62%, up from 0.59% for the year ended December 31, 2012. The Company’s return on average equity was 6.49% for the quarter ended December 31, 2013, up from 3.59% for the quarter ended December 31, 2012. For the year ended December 31, 2013, the Company’s return on average equity was 6.39%, up from 5.42% for the year ended December 31, 2012.

During the second quarter of 2012, the Company recognized a pre-tax gain of $4.8 million on the sale of its investment in Hampshire First Bank, which was 43% owned by the Company, to NBT Bancorp, Inc. and NBT Bank, N.A. On an after-tax basis, this one-time gain increased net income by $2.9 million, or $0.13 per diluted share, for the year ended December 31, 2012.

Richard J. Gavegnano, Chairman and Chief Executive Officer, said, “I am pleased to report net income of $4.0 million, or $0.18 per share, for the fourth quarter and a record $15.4 million, or $0.70 per share, for the full year of 2013 as our operating profitability continues to increase. Our total assets grew to $2.7 billion in 2013 due to a net increase in loans of $479 million, or 27%, to $2.3 billion funded by a net increase in deposits of $383 million, or 21%, to $2.2 billion. During the past year, we opened three new branches in the lucrative Boston area markets of Belmont, Allston and Somerville, our 27^th full service location, as we continue to gain traction in attracting new lending and core deposit customer relationships across all of our business lines.”

Net interest income increased $2.7 million, or 15.5%, to $20.0 million for the quarter ended December 31, 2013 from $17.3 million for the quarter ended December 31, 2012. The net interest rate spread and net interest margin were 3.05% and 3.20%, respectively, for the quarter ended December 31, 2013 compared to 3.17% and 3.33%, respectively, for the quarter ended December 31, 2012. For the year ended December 31, 2013, net interest income increased $9.0 million, or 13.7%, to $75.1 million from $66.0 million for the year ended December 31, 2012. The net interest rate spread and net interest margin were 3.08% and 3.23%, respectively, for the year ended December 31, 2013 compared to 3.23% and 3.40%, respectively, for the year ended December 31, 2012. The increases in net interest income were due primarily to loan growth along with declines in the cost of funds, partially offset by declines in yields on interest-earning assets and deposit growth for the fourth quarter and year ended December 31, 2013 compared to the same periods in 2012.

The average balance of the Company’s loan portfolio increased $459.9 million, or 29.7%, to $2.011 billion, which was partially offset by the decline in the yield on loans of 44 basis points to 4.51% for the year ended December 31, 2013 compared to the year ended December 31, 2012. The average balance of the Company’s total deposits increased $350.0 million, or 20.4%, to $2.061 billion, which was partially offset by the decline in cost of total deposits of nine basis points to 0.83% for the year ended December 31, 2013 compared to the year ended December 31, 2012. The Company’s yield on interest-earning assets declined 27 basis points to 4.08% for the year ended December 31, 2013 compared to 4.35% for the year ended December 31, 2012, while the cost of funds declined 12 basis points to 0.90% for the year ended December 31, 2013 compared to 1.02% for the year ended December 31, 2012.

Mr. Gavegnano noted, “Over the last two years, our loan portfolio grew $924 million, or 69%, and core deposits grew $615 million, or 64%. This exceptionally strong growth contributed to ten consecutive quarters of rising net interest income, while significantly reducing pressure on our net interest margin despite declining loan yields.”

The Company’s provision for loan losses was $1.8 million for the quarter ended December 31, 2013 compared to $2.8 million for the quarter ended December 31, 2012. For the year ended December 31, 2013, the provision for loan losses was $6.5 million compared to $8.6 million for the year ended December 31, 2012. These changes were based primarily on management’s assessment of loan portfolio growth and composition changes, historical charge-off trends, an ongoing evaluation of credit quality and current economic conditions. The allowance for loan losses was $25.3 million or 1.11% of total loans outstanding at December 31, 2013, compared to $20.5 million or 1.13% of total loans outstanding at December 31, 2012. Net charge-offs totaled $184,000 for the quarter ended December 31, 2013, or 0.03% of average loans outstanding, and $1.6 million for the year ended December 31, 2013, or 0.08% of average loans outstanding.

Non-performing loans increased $2.0 million, or 4.9%, to $41.5 million, or 1.81% of total loans outstanding, at December 31, 2013, from $39.6 million, or 2.19% of total loans outstanding, at December 31, 2012, primarily due to a net increase of $3.5 million in non-performing construction loans. Non-performing assets increased $744,000, or 1.8%, to $42.9 million, or 1.60% of total assets, at December 31, 2013, from $42.2 million, or 1.85% of total assets, at December 31, 2012. Non-performing assets at December 31, 2013 were comprised of $11.3 million of construction loans, $9.0 million of commercial real estate loans, $17.6 million of one- to four-family mortgage loans, $2.7 million of home equity loans, $949,000 of commercial business loans and foreclosed real estate of $1.4 million. Non-performing assets at December 31, 2013 included $15.8 million of assets acquired in the January 2010 Mt. Washington Co-operative Bank merger, comprised of $15.4 million of non-performing loans and $401,000 of foreclosed real estate.

Non-interest income increased $932,000, or 22.4%, to $5.1 million for the quarter ended December 31, 2013 from $4.2 million for the quarter ended December 31, 2012, primarily due to increases of $616,000 in gain on sales of securities, net, $355,000 in other income and $183,000 in customer service fees, partially offset by a decrease of $332,000 in mortgage banking gains, net. For the year ended December 31, 2013, non-interest income decreased $1.8 million, or 8.7%, to $19.4 million from $21.3 million for the year ended December 31, 2012, primarily due to the prior year $4.8 million gain on sale of its investment in the Hampshire First Bank affiliate and a decrease of $1.8 million in mortgage banking gains, net, partially offset by increases of $4.1 million in gain on sales of securities, net, $484,000 in customer service fees and $357,000 in other income. The decreases in mortgage banking gains, net are primarily due to declines in mortgage loan sales along with related derivative valuations on commitments to originate loans for sale and contracts to sell loans. The increases in other income are primarily due to loan swap fee income recognized in the fourth quarter of 2013.

Non-interest expenses increased $1.5 million, or 9.8%, to $17.0 million for the quarter ended December 31, 2013 from $15.5 million for the quarter ended December 31, 2012, primarily due to increases of $235,000 in salaries and employee benefits, $320,000 in occupancy and equipment, $189,000 in data processing, $136,000 in marketing and advertising, $181,000 in professional services, $213,000 in foreclosed real estate expense and $181,000 in other non-interest expenses. For the year ended December 31, 2013, non-interest expenses increased $4.6 million, or 7.6%, to $64.5 million from $59.9 million for the year ended December 31, 2012, primarily due to increases of $3.2 million in salaries and employee benefits, $866,000 in occupancy and equipment expense, $763,000 in data processing, $412,000 in marketing and advertising and $293,000 in deposit insurance, partially offset by decreases of $658,000 in professional services reflecting a decline in legal and consulting expenses, $120,000 in foreclosed real estate expense and $221,000 in other non-interest expenses. The increases in salaries and employee benefits and occupancy and equipment expenses were primarily associated with the opening of new branches and costs associated with the expansion of residential and commercial lending capacity. The Company’s efficiency ratio was 74.45% for the quarter ended December 31, 2013 compared to 78.04% for the quarter ended December 31, 2012. For the year ended December 31, 2013, the efficiency ratio was 76.04% compared to 77.96% for the year ended December 31, 2012, excluding the gain on sale of the Hampshire First Bank affiliate.

Mr. Gavegnano added, “The steady improvement in our efficiency ratio is a result of the strong rise in net interest income and moderate increases in non-interest expenses. Our opportunities over the past two years to recruit highly qualified employees in conjunction with investments in infrastructure and technology for expansion of our business capacity has yielded increased market share along with improved operating profitability. We expect these positive trends to continue as we prudently manage our growth and cost structure.”

The Company recorded a provision for income taxes of $2.2 million for the quarter ended December 31, 2013, reflecting an effective tax rate of 35.7%, compared to $1.1 million, or 33.8%, for the quarter ended December 31, 2012. For the year ended December 31, 2013, the provision for income taxes was $8.1 million, reflecting an effective tax rate of 34.3%, compared to $6.3 million, or 33.7%, for the year ended December 31, 2012. The change in the effective tax rate was primarily due to changes in the components of pre-tax income.

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Total assets increased $403.3 million, or 17.7%, to $2.682 billion at December 31, 2013 from $2.279 billion at December 31, 2012. Net loans increased $479.1 million, or 26.8%, to $2.265 billion at December 31, 2013 from $1.786 billion at December 31, 2012. The net increase in loans for the year ended December 31, 2013 was primarily due to increases of $236.8 million in commercial real estate loans, $109.2 million in multi-family loans, $35.5 million in construction loans and $99.2 million in commercial business loans. Cash and cash equivalents decreased $6.9 million, or 7.4%, to $86.3 million at December 31, 2013 from $93.2 million at December 31, 2012. Securities available for sale decreased $61.6 million, or 23.5%, to $201.1 million at December 31, 2013 from $262.8 million at December 31, 2012.

Total deposits increased $383.2 million, or 20.5%, to $2.249 billion at December 31, 2013 from $1.865 billion at December 31, 2012, including net growth in core deposits of $335.7 million, or 27.1%, to $1.573 billion, or 69.9% of total deposits. Total borrowings increased $649,000, or 0.4%, to $161.9 million at December 31, 2013 from $161.3 million at December 31, 2012.

Total stockholders’ equity increased $15.3 million, or 6.5%, to $249.2 million at December 31, 2013, from $233.9 million at December 31, 2012. The increase for the year ended December 31, 2013 was due primarily to $15.4 million in net income and $2.2 million related to stock-based compensation plans, partially offset by a decrease of $811,000 in accumulated other comprehensive income reflecting a decrease in the fair value of available for sale securities, net of tax and a $1.6 million increase in treasury stock resulting from the Company’s repurchase of 91,086 shares. Stockholders’ equity to assets was 9.29% at December 31, 2013, compared to 10.27% at December 31, 2012. Book value per share increased to $11.27 at December 31, 2013 from $10.57 at December 31, 2012. Tangible book value per share increased to $10.65 at December 31, 2013 from $9.95 at December 31, 2012. Market price per share increased $5.80, or 34.6%, to $22.58 at December 31, 2013 from $16.78 at December 31, 2012. At December 31, 2013, the Company and the Bank continued to exceed all regulatory capital requirements.

As of December 31, 2013, the Company had repurchased 287,652 shares of its stock at an average price of $14.68 per share, or 31.8% of the 904,224 shares authorized for repurchase under the Company’s fourth repurchase program as adopted during 2011. The Company has repurchased 1,691,580 shares at an average price of $10.89 per share since December 2008.

Mr. Gavegnano concluded, “Our key performance and asset quality ratios continue to show favorable trends. We are committed to the careful execution of our plans for how the Company and East Boston Savings Bank can profitably grow the franchise while enhancing stockholder value.”

Meridian Interstate Bancorp, Inc. is the holding company for East Boston Savings Bank. East Boston Savings Bank, a Massachusetts-chartered stock savings bank founded in 1848, operates 27 full service locations in the greater Boston metropolitan area including nine full-service locations in its Mt. Washington Bank Division. We offer a variety of deposit and loan products to individuals and businesses located in our primary market, which consists of Essex, Middlesex and Suffolk Counties, Massachusetts. For additional information, visit www.ebsb.com.

Forward Looking Statements

Certain statements herein constitute forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Such statements may be identified by words such as “believes,” “will,” “expects,” “project,” “may,” “could,” “developments,” “strategic,” “launching,” “opportunities,” “anticipates,” “estimates,” “intends,” “plans,” “targets” and similar expressions. These statements are based upon the current beliefs and expectations of Meridian Interstate Bancorp, Inc.’s management and are subject to significant risks and uncertainties. Actual results may differ materially from those set forth in the forward-looking statements as a result of numerous factors. Factors that could cause such differences to exist include, but are not limited to, general economic conditions, changes in interest rates, regulatory considerations, and competition and the risk factors described in the Company’s Annual Report on Form 10-K and Quarterly Reports on Form 10-Q as filed with the Securities and Exchange Commission. Should one or more of these risks materialize or should underlying beliefs or assumptions prove incorrect, Meridian Interstate Bancorp, Inc.’s actual results could differ materially from those discussed. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this release.

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MERIDIAN INTERSTATE BANCORP, INC. AND SUBSIDIARIES

Consolidated Balance Sheets

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MERIDIAN INTERSTATE BANCORP, INC. AND SUBSIDIARIES

Consolidated Statements of Net Income

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MERIDIAN INTERSTATE BANCORP, INC. AND SUBSIDIARIES

Net Interest Income Analysis

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MERIDIAN INTERSTATE BANCORP, INC. AND SUBSIDIARIES

Net Interest Income Analysis

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MERIDIAN INTERSTATE BANCORP, INC. AND SUBSIDIARIES

Selected Financial Highlights

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