EXHIBIT 99


                                     [LOGO]


January 28, 2004


Dear Shareholder:

Enterprise Bancorp,  Inc. reported net income of $6.9 million for the year ended
December  31, 2003,  compared to $6.3 million for 2002,  an increase of 10%. Net
income for the three  months ended  December  31, 2003  amounted to $1.9 million
compared to $1.7 million for the same period in 2002.

As  reported   previously,   on  June  23,  2003  Enterprise  Bank,  along  with
approximately  sixty-five  other  Massachusetts  banks,  and  the  Massachusetts
Department of Revenue reached a final settlement  regarding disputed retroactive
tax  assessments  concerning  the bank's REIT  subsidiary,  for tax years 1999 -
2002. Under the terms of the settlement, the one-time tax impact to the bank was
approximately $1.1 million.

The bank  reported  total  assets of $751.5  million at December  31,  2003,  an
increase of 4% from December 31, 2002.  Total loans were $488.8 million,  an 18%
increase versus one year ago.  Deposits plus repurchase  agreements  amounted to
$661.8 million, up 4% over the prior year. In addition, the company's Investment
Management and Trust Group reported investment assets under management of $375.3
million, an increase of 18% versus one year ago. Total assets, investment assets
under  management,  and  mortgage  loans  serviced  for others  amounted to $1.1
billion at December 31, 2003, an increase of 8% over December 31, 2002.

Enterprise Bank has achieved  tremendous  success in the past fifteen years. Our
strong financial position is a result of the loyalty,  dedication and commitment
of our shareholders,  employees and customers.  On Monday,  January 5 (January 3
was our actual  anniversary  date), we invited  customers and friends to stop by
for refreshments in all our branch offices.  The occasion  provided us a special
opportunity  to  personally  express our  appreciation  to many friends who have
helped build our  "Enterprise."  As  shareholders,  you are the true keys to our
success, and we are extremely grateful for your support.

At the December  meeting of our Board of Directors,  Enterprise  Executive  Vice
President/Treasurer  Jack Clancy was named a Bank  Director,  in addition to his
position as President of Enterprise Bancorp,  Inc. Jack has been a guiding force
in many strategic  initiatives and has assumed additional  responsibilities each
year, with a goal of continually increasing long-term shareholder value. A great
resource to our Board, Jack brings his business acumen,  experience,  leadership
skills and market knowledge to his new Board responsibilities.

The turmoil in the local banking environment (the acquisition of First Essex and
the  Fleet/Bank  of America  merger to list but two  examples)  has  provided us
additional market opportunities,  and we are eager to accept the challenges that
2004  present.  We are pleased to announce  that  Enterprise  has  received  all
necessary  approvals to locate a full-service  financial  services  center at 63
Park  Street in the Park  Street  Village  Building  in  Andover.  The  Andovers
(Andover/North  Andover)  have been a high  priority on our "wish list" for many
years. We believe this market is a prime site for us as we hear frequently about
the area's need for an independent community bank. With its vibrant professional
community,   (Andover/North   Andover  boasts  a  large  number  of  physicians,
attorneys,  accountants,  high-tech  professionals),  its proximity to highways,
good schools, ample commercial space and attractive housing market, Andover is a
community  that fits well into  Enterprise's  target  market.  Many residents of
Greater  Lowell have  relocated to Andover in the past two decades,  and we have
many personal and professional relationships there. We anticipate that trust and
investment  services will be an important  component of our new Andover location
in the years ahead.  We will begin interior  renovations at Park Street shortly,
and tentatively plan for a early spring opening.

Senior Vice President/Chief  Commerical Real Estate Lender Steven Larochelle and
Vice President  Marlene Hoyt, two valued members of our lending team,  have many
years of experience in the Andover  market.  In addition,  Donald  Schroeder has
recently joined us as Senior Vice  President/Commercial  Lending, and he will be
working out of our Andover office.  Bringing over 30 years of commercial lending
experience in the Merrimack Valley,  Don will be a tremendous asset to our bank.
He has a strong customer base,  built during his tenure at the former  Arlington
Trust  Company,  and more  recently,  First Essex Bank in Andover.  Don attended
UMass Lowell and Merrimack College, and is involved in a wide range of community
activities  including the Board of Directors of the Andover Chamber of Commerce,
and the Board of Directors for the Andover  Community Trust. He is also a member
of the Greater  Lawrence  Kiwanis Club, a Trustee for the Merrimack Valley YMCA,
and past Chairman of the Finance Committee for the Town of Andover.

During the past several years, our strategic goal has been to further expand the
Enterprise  franchise  in several key  markets.  The May 5, 2003  opening of our
Fitchburg office builds our franchise in the North Central region,  and our move
to Andover brings the Enterprise name further down the Route 495 corridor,  thus
beginning  our expansion  into Essex  County.  We  continually  seek  additional
locations within these targeted regions, and we anticipate other branch openings
to further expand the footprint of Enterprise's market area.

In late March,  we will be sending our 2003 annual  report to all  shareholders,
including a detailed analysis of the bank's progress,  as well as proxy material
in preparation for Enterprise Bancorp,  Inc.'s annual meeting which will be held
on Tuesday, May 4 at 4 p.m. at the American Textile Museum, 491 Dutton Street in
Lowell. Each year, we look forward to the opportunity to speak with shareholders
and discuss our plans for the bank's continued growth and profitability.  We are
proud to be the region's  largest  independent  community  bank. 2003 has been a
successful year, and we look forward to pursuing many new business opportunities
in the year ahead.

Sincerely,



/s/ George L. Duncan       /s/ Richard W. Main           /s/ John P. Clancy, Jr.
- --------------------       -------------------           -----------------------
George L. Duncan           Richard W. Main               John P. Clancy, Jr.
Chairman/Chief             President/Chief Lending       President/Enterprise
Executive Officer          Officer/Chief Operating       Bancorp Inc./EVP/
                           Officer                       Treasurer/Enterprise
                                                         Bank





                    Enterprise Bancorp, Inc. and Subsidiaries

                              STATEMENTS OF INCOME
                                   (unaudited)



                                                             Three Months Ended           Twelve Months Ended
                                                                December 31,                  December 31,
                                                        ---------------------------   ------------------------------
                                                            2003            2002           2003            2002
                                                        ------------   ------------   ------------     -------------
                                                                                           
INTEREST INCOME
    Interest and fees on loans                         $  7,287,466    $  7,194,989    $ 28,273,966    $ 28,133,684
    Interest on investment securities                     1,727,457       2,707,486       7,713,915      10,588,148
    Interest on federal funds sold                          110,217          61,639         352,664         232,311
                                                       ------------    ------------    ------------    ------------
       Total interest income                              9,125,140       9,964,114      36,340,545      38,954,143
                                                       ------------    ------------    ------------    ------------

INTEREST EXPENSE
    Interest on deposits                                  1,551,214       2,239,384       6,719,716       9,399,284
    Interest on repurchase agreements                         2,462           3,400          11,021         282,778
    Interest on Federal Home Loan Bank borrowings            11,139           9,751          80,903          40,550
    Interest on subordinated debentures                     294,305         294,305       1,177,219       1,177,219
                                                       ------------    ------------    ------------    ------------
       Total interest expense                             1,859,120       2,546,840       7,988,859      10,899,831
                                                       ------------    ------------    ------------    ------------

NET INTEREST INCOME                                       7,266,020       7,417,274      28,351,686      28,054,312

    Provision for loan losses                               241,875         277,500       1,075,000       1,325,000
                                                       ------------    ------------    ------------    ------------

    Net interest income after provision for loan
    losses                                                7,024,145       7,139,774      27,276,686      26,729,312
                                                       ------------    ------------    ------------    ------------

    Operating expenses                                   (5,380,262)     (5,631,928)    (20,657,920)    (22,244,407)
    Depreciation                                           (620,559)       (671,552)     (2,551,449)     (2,569,777)
    Amortization of intangible assets                       (33,192)        (33,192)       (132,769)       (132,769)
    Non-interest income                                   1,638,415       1,584,598       6,580,482       5,577,719
    Net gains on sales of investment securities             280,762            --         2,149,892       1,341,475
                                                       ------------    ------------    ------------    ------------
       Income before provision for income taxes           2,909,309       2,387,700      12,664,922       8,701,553
    Provision for income taxes                            1,028,965         696,306       5,719,886       2,395,068
                                                       ------------    ------------    ------------    ------------

NET INCOME                                             $  1,880,344    $  1,691,394    $  6,945,036    $  6,306,485
                                                       ============    ============    ============    ============

EARNINGS PER SHARE
Basic earnings per common share                        $       0.52    $       0.48    $       1.95    $       1.80
                                                       ============    ============    ============    ============

Diluted earnings per common share                      $       0.50    $       0.46    $       1.87    $       1.75
                                                       ============    ============    ============    ============

Dividend per common share (1)                          $       --      $       --      $       0.38    $       0.33
                                                       ============    ============    ============    ============

Basic weighted average common shares outstanding (2)      3,593,015       3,523,752       3,565,734       3,494,818
                                                       ============    ============    ============    ============

Diluted weighted average common shares outstanding        3,762,112       3,639,803       3,712,367       3,611,712
                                                       ============    ============    ============    ============


(1)  Annual  dividends  are  generally  declared  in the second  quarter of each
     fiscal year.

(2)  Weighted  average  common  shares  outstanding  have  increased  due to the
     exercise of employee stock options and  reinvestment  of dividends from the
     dividend reinvestment plan.





                    Enterprise Bancorp, Inc. and Subsidiaries

                                 BALANCE SHEETS

                                   (unaudited)




                                                       December 31, 2003  December 31, 2002
                                                      ------------------  -----------------
                                                                    
ASSETS
    Cash and due from banks                            $    31,101,961    $    45,778,048
    Federal funds sold                                      14,000,000               --
    Investment securities                                  196,308,098        239,096,327
    Loans                                                  488,839,152        414,123,485
        Allowance for loan losses                           (9,986,425)        (9,371,057)
                                                       ---------------    ---------------
     Net loans                                             478,852,727        404,752,428
                                                       ---------------    ---------------
    Bank premises and equipment                             12,429,021         13,143,900
    Intangible assets                                        6,530,123          6,662,892
    Other assets                                            12,323,241         11,996,481
                                                       ---------------    ---------------

TOTAL ASSETS                                           $   751,545,171    $   721,430,076
                                                       ===============    ===============

LIABILITIES AND STOCKHOLDERS' EQUITY
    Deposits                                           $   660,824,382    $   638,052,154
    Repurchase agreements                                      953,924            762,737
    Federal Home Loan Bank borrowings                       20,470,000         16,470,000
    Junior subordinated debentures (1)                      10,825,000         10,825,000
    Other liabilities                                        3,721,291          5,239,855
                                                       ---------------    ---------------
       Total liabilities                                   696,794,597        671,349,746
                                                       ---------------    ---------------

    Stockholders' equity                                    52,511,133         45,612,399
    Net unrealized appreciation on investment
    securities, net of taxes                               2,239,441          4,467,931
                                                       ---------------    ---------------
       Total stockholders' equity                           54,750,574         50,080,330
                                                       ---------------    ---------------

  TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY           $   751,545,171    $   721,430,076
                                                       ===============    ===============


    Investment assets under management                 $   375,296,992    $   317,394,210
                                                       ===============    ===============

    Mortgage loans serviced for others                 $    15,077,295    $    16,860,951
                                                       ===============    ===============

    Total assets, investment assets under management
      and mortgage loans serviced for others           $ 1,141,919,458    $ 1,055,685,237
                                                       ===============    ===============




(1)  Beginning on December 31,  2003,  the Company has excluded its  subsidiary,
     Enterprise (MA) Capital Trust I ("Trust"),  from the  consolidated  balance
     sheet, as required by a recent accounting  standard issued by the Financial
     Accounting  Standards  Board (FASB).  This new FASB  standard  required the
     Company to exclude the $10.5 million of trust preferred  securities  issued
     by the Trust,  and instead  report the $10.8 million  liability owed to the
     Trust (junior subordinated debentures).  The Company has elected to restate
     prior periods for comparability purposes.