425

                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT
                       Pursuant to Section 13 OR 15(d) of
                       the Securities Exchange Act of 1934


       Date of Report (Date of earliest event reported): December 20, 2007


                           CAMDEN NATIONAL CORPORATION
               (Exact name of Registrant as specified in charter)


           MAINE                      01-28190                    01-0413282
(State or other jurisdiction         (Commission                (IRS employer
      of incorporation)              File Number)            Identification No.)


          Two Elm Street, Camden, Maine                              04843
    (Address of principal executive offices)                      (Zip Code)


                                 (207) 236-8821
              (Registrant's telephone number, including area code)


Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):

[X]  Written communications pursuant to Rule 425 under the Securities Act (17
     CFR 230.425)

[ ]  Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17
     CFR 240.14a-12)

[ ]  Pre-commencement communications pursuant to Rule 14d-2(b) under the
     Exchange Act (17 CFR 240.14d-2(b))

[ ]  Pre-commencement communications pursuant to Rule 13e-4(c) under the
     Exchange Act (17 CFR 240.13e-4(c))




Item 3.01  Notice of Delisting or Failure to Satisfy a Continued Listing Rule or
           Standard; Transfer of Listing

     Camden National Corporation (the "Company") received approval from the
NASDAQ Stock Market for its common stock to be listed on The NASDAQ Global
Market ("NASDAQ") under the symbol CAC. The Company anticipates trading of its
securities on NASDAQ to commence on Wednesday, January 2, 2008.

Item 8.01  Other Events

     The Company issued a press release announcing the approval from NASDAQ. The
full text of the press release is attached as Exhibit 99.1 to this Current
Report on Form 8-K.

     Additional Information and Where to Find It

     In connection with the proposed Merger of Union Bankshares with and into
Camden, Camden and Union Bankshares have filed relevant materials with the SEC,
including the registration statement on Form S-4 containing a proxy
statement/prospectus dated October 23, 2007. INVESTORS ARE URGED TO READ THESE
MATERIALS BECAUSE THEY CONTAIN IMPORTANT INFORMATION ABOUT CAMDEN, UNION
BANKSHARES AND THE MERGER. The proxy statement/prospectus and other relevant
materials, and any other documents filed by Camden or Union Bankshares with the
SEC, may be obtained free of charge at the SEC's website at www.sec.gov. In
addition, investors may obtain free copies of the documents filed with the SEC
by Camden by directing a written request to Camden National Corporation, Two Elm
Street, Camden, Maine 04843, Attention: Suzanne Brightbill, and free copies of
the documents filed with the SEC by Union Bankshares by directing a written
request to Union Bankshares Company, 66 Main Street, Ellsworth, Maine 04605,
Attention: Clerk.

     Participants in Solicitation

     Information about the directors and executive officers of Camden and Union
Bankshares and information about any other persons who may be deemed
participants in this transaction is included in the proxy statement/prospectus
dated October 23, 2007. You can find information about Camden's directors and
executive officers in the proxy statement for Camden's annual meeting of
stockholders filed with the SEC on March 21, 2007. You can find information
about Union Bankshares's directors and executive officers in the proxy
statement/prospectus dated October 23, 2007. You can obtain free copies of these
documents from the SEC, Camden or Union Bankshares using the contact information
above.

     Forward-Looking Statements

     This report contains statements that may be considered forward-looking
statements within the meaning of Section 27A of the Securities Act of 1933 and
Section 21E of the Securities Exchange Act of 1934. Forward-looking statements
can be identified by the use of the words "believe," "expect," "anticipate,"
"intend," "estimate," "assume," "will," "should," and other expressions which
predict or indicate future events or trends and which do not relate to
historical matters. Forward-looking statements should not be relied on, because
they involve known and unknown risks, uncertainties and other factors, some of
which are beyond the control of Camden and Union Bankshares. These risks,
uncertainties and other factors may cause the actual results, performance or
achievements of Camden and Union Bankshares to be materially different from the
anticipated future results, performance or achievements expressed or implied by
the forward-looking statements.

     Some of the factors that might cause these differences include the
following: (i) failure of the parties to satisfy the closing conditions in the
Merger Agreement in a timely manner or at all; (ii) failure of the shareholders
of Union Bankshares to approve the Merger Agreement; (iii) failure to obtain
governmental approvals of the Merger, or imposition of adverse regulatory
conditions in connection with such approvals; (iv) disruptions in the businesses
of the parties as a result of the pendency of the Merger; (v) integration costs
following the merger, (vi) changes in general, national or regional economic
conditions; (vii) changes in loan default and charge-off rates; (viii)
reductions in deposit levels necessitating increased borrowing to fund loans and
investments; (ix) changes in interest rates; (x) changes in laws and
regulations; (xi) changes in the size and nature of the Camden's competition and
(xii) changes in the assumptions used in making such forward-looking statements.
Other factors could also cause these differences. For more information about
these factors please see Camden's and Union Bankshares' filings with the SEC,
including their Annual Report on Form 10-K on file with the Securities and
Exchange Commission ("SEC"). All of these factors should be carefully reviewed,
and readers should not place undue reliance on these forward-looking statements.
These forward-looking statements were based on information, plans and estimates
at the date of this report, and the Company does not promise to update any
forward-looking statements to reflect changes in underlying assumptions or
factors, new information, future events or other changes.

                                       2



Item 9.01. Financial Statements and Exhibits.

(d)  The following exhibits are filed with this Report:

     Exhibit No.    Description
     -----------    -----------

     99.1           Press Release issued by Camden National Corporation on
                    December 20, 2007.



                                   SIGNATURES

     Pursuant to the requirements of the Securities Exchange Act of 1934, as
amended, the Company has duly caused this report to be filed on its behalf by
the undersigned thereunto duly authorized.

     CAMDEN NATIONAL CORPORATION


     By: /s/ Sean G. Daly                                Date: December 20, 2007
         -------------------------------------
         Sean G. Daly
         Chief Financial Officer and Principal
         Financial & Accounting Officer

                                       3

EX-99.1

                                                                    Exhibit 99.1

                 Camden National Corporation Announces
                       NASDAQ Listing Approval

    Trading Expected to Commence January 2, 2008


    CAMDEN, Maine--(BUSINESS WIRE)--Dec. 20, 2007--Robert W. Daigle,
president and chief executive officer of Camden National Corporation
(AMEX: CAC; the "Company"), today announced that the Company has
received approval from the NASDAQ Stock Market for its common stock to
be listed on The NASDAQ Global Select Market under the symbol CAC. The
Company anticipates trading of its securities on NASDAQ to commence on
Wednesday, January 2, 2008.

    NASDAQ(R) is the largest U.S. electronic stock market. With
approximately 3,200 companies, it lists more companies and, on
average, its systems trade more shares per day than any other U.S.
market. NASDAQ is home to companies that are leaders across all areas
of business including financial services, technology, retail,
communications, transportation, media and biotechnology. NASDAQ is the
primary market for trading NASDAQ-listed stocks. For more information
about NASDAQ, visit the NASDAQ Web site at http://www.nasdaq.com or
the NASDQ Newsroom(SM) http://www.nasdaq.com/newsroom.

    Camden National Corporation, a 2006 Best Places to Work in Maine
company headquartered in Camden, Maine, and listed on the American
Stock Exchange under the symbol CAC, is the holding company for a
family of two financial services companies, including: Camden National
Bank ("CNB"), a full-service community bank with 27 banking offices
serving coastal, western, central and eastern Maine, and recipient of
the Governor's Award for Business Excellence in 2002, and Acadia
Trust, N.A., offering investment management and fiduciary services
with offices in Portland and Bangor. Acadia Financial Consultants is a
division of CNB, offering full-service brokerage services. As
previously announced, Camden has received regulatory approval for its
Agreement and Plan of Merger with Union Bankshares Company, pursuant
to which Union Bankshares will merge with and into Camden (the
"Merger").

    This press release and the documents incorporated by reference
herein contain certain statements that may be considered
forward-looking statements under the Private Securities Litigation
Reform Act of 1995. Forward-looking statements can be identified by
the use of the words "believe," "expect," "anticipate," "intend,"
"estimate," "assume," "will," "should," and other expressions which
predict or indicate future events or trends and which do not relate to
historical matters. Forward-looking statements should not be relied
on, because they involve known and unknown risks, uncertainties and
other factors, some of which are beyond the control of the Company.
These risks, uncertainties and other factors may cause the actual
results, performance or achievements of the Company to be materially
different from the anticipated future results, performance or
achievements expressed or implied by the forward-looking statements.

    Some of the factors that might cause these differences include the
following: changes in general, national or regional economic
conditions; changes in loan default and charge-off rates; reductions
in deposit levels necessitating increased borrowing to fund loans and
investments; changes in interest rates; changes in laws and
regulations; changes in the size and nature of the Company's
competition; and changes in the assumptions used in making such
forward-looking statements. Other factors could also cause these
differences. For more information about these factors please see our
Annual Report on Form 10-K on file with the SEC. All of these factors
should be carefully reviewed, and readers should not place undue
reliance on these forward-looking statements.

    These forward-looking statements were based on information, plans
and estimates at the date of this press release, and the Company does
not promise to update any forward-looking statements to reflect
changes in underlying assumptions or factors, new information, future
events or other changes.


    CONTACT: Camden National Corporation
             Suzanne Brightbill, 207-230-2120
             Public Relations Officer
             sbrightbill@camdennational.com