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): June 26, 2006

                              REPUBLIC BANCORP INC.
--------------------------------------------------------------------------------
             (Exact name of registrant as specified in its charter)

         Michigan                    0-15734                  38-2604669
--------------------------------------------------------------------------------
      (State or other         (Commission File No.)          (IRS Employer
      jurisdiction of                                     Identification No.)
      incorporation)

                  1070 East Main Street, Owosso, Michigan 48867
               (Address of principal executive offices) (Zip Code)
--------------------------------------------------------------------------------

       Registrant's telephone number, including area code: (989) 725-7337
--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
          (Former name or former address, if changed since last report)

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 1.01.  Entry into a Material Definitive Agreement

      On June 26, 2006, Republic Bancorp Inc. ("Republic") entered into an
Agreement and Plan of Merger (the "Merger Agreement") with Citizens Banking
Corporation ("Citizens") pursuant to which Republic will merge with and into
Citizens, with Citizens continuing as the surviving corporation (the "Merger").

      Subject to the terms and conditions of the Merger Agreement, which has
been unanimously approved by the Boards of Directors of both companies, each
holder of Republic common stock will have the right, subject to proration, to
elect to receive, for each such share of Republic common stock, cash or Citizens
common stock, in either case having a value equal to $2.08 plus 0.4378 of a
share of Citizens common stock. Based on Citizens' average closing Nasdaq stock
price for the 10-day trading period ended June 26, 2006, the transaction is
valued at $13.86 per Republic share, for a total transaction value of
approximately $1.048 billion. Republic stock options that are outstanding as of
the closing will be converted into options on shares of Citizens common stock in
connection with the closing, with appropriate adjustment to the number of shares
and exercise price to reflect the Merger. Each outstanding Republic restricted
share will be converted into the right to receive shares of Citizens common
stock based on the implied exchange ratio in the Merger.

      Republic and Citizens have made customary representations, warranties and
covenants in the Merger Agreement, including, among others, covenants (i) to
conduct their respective businesses in the ordinary course consistent with past
practice during the interim period between the execution of the Merger Agreement
and consummation of the Merger and (ii) not to engage in certain kinds of
transactions during such period. The Board of Directors of each company has
adopted a resolution recommending approval and adoption by its respective
shareholders, and each company has agreed to submit the Merger Agreement to its
respective shareholders for consideration. Citizens and Republic have each also
agreed not to (i) solicit proposals relating to alternative business combination
transactions or (ii) subject to certain exceptions, enter into discussions or an
agreement concerning or provide confidential information in connection with any
proposals for alternative business combination transactions.

      The representations and warranties of each party set forth in the Merger
Agreement have been made solely for the benefit of the other party to the Merger
Agreement. In addition, such representations and warranties (i) have been
qualified by disclosures made to the other party in connection with the Merger
Agreement, (ii) will not survive consummation of the Merger, (iii) in many cases
are subject to a material adverse effect standard contained in Section 3.1 of
the Merger Agreement which may differ from what may be viewed as material by
investors and (iv) were made only as of the date of the Merger Agreement or such
other date as is specified in the Merger Agreement.

      Consummation of the Merger is subject to customary conditions, including,
without limitation, (i) receipt of the approval of the holders of Republic and
Citizens common stock, respectively; (ii) receipt of regulatory approvals; (iii)
absence of any law or order prohibiting the closing; (iv) subject to certain
exceptions, the accuracy of the representations and warranties of each of
Republic and Citizens, respectively; (v) material compliance of each party's
respective covenants and (vi) the delivery of customary opinions from counsel to
each of Republic and Citizens, respectively, that the Merger will qualify as a
tax-free reorganization for federal income tax purposes.

      Pursuant to the Merger Agreement, upon completion of the Merger, the Board
of Directors of the surviving corporation will consist of 16 directors until the
2008 shareholders' meeting, including 9 continuing members of the Citizens Board
of Directors (the "Citizens Directors") and 7 members of the Republic Board of
Directors (the "Republic Directors"). Thereafter, the Board of Directors of the
surviving corporation will consist of (i) 8 Citizens Directors and 6 Republic
Directors until the 2009 shareholders' meeting and (ii) 7 Citizens Directors and
5 Republic Directors until the 2010 shareholders' meeting. Jerry Campbell, the
current Chairman of the Board of Directors of Republic, will serve as the
Chairman of the surviving corporation until the first anniversary of the closing
date. William Hartman, the current CEO, President and Chairman of the Board of
Directors of Citizens, will serve as the Chairman of the surviving corporation
from the first anniversary of the closing date until December 31, 2012.

      In addition, upon completion of the Merger, Mr. Hartman will serve as CEO
of the surviving corporation until December 31, 2010, during which time Dana
Cluckey, the current CEO and President of Republic, will serve as President and
COO. Mr. Cluckey will serve as CEO commencing on January 1, 2011.

      The foregoing description of the Merger and the Merger Agreement does not
purport to be complete and is qualified in its entirety by reference to the
Merger Agreement, a copy of which is attached hereto as Exhibit 2.1 and is
incorporated herein by reference.

Additional Information

      In connection with the proposed merger, Citizens and Republic will file a
joint proxy statement/prospectus with the Securities and Exchange Commission
("SEC"). INVESTORS AND SECURITY HOLDERS ARE ADVISED TO READ THE JOINT PROXY
STATEMENT/PROSPECTUS WHEN IT BECOMES AVAILABLE BECAUSE IT WILL CONTAIN IMPORTANT
INFORMATION. Investors and security holders may obtain a free copy of the joint
proxy statement/prospectus (when available) and other documents filed by
Citizens and Republic with the SEC at the SEC's website at http://www.sec.gov.
Free copies of the joint proxy statement/prospectus (when available) and each
company's other filings with the SEC may also be obtained by accessing Citizens'
website at http://www.citizensonline.com under the Investor Relations section or
by accessing Republic's website at http://www.republicbancorp.com under the
Investor Relations section.

      Citizens and Republic and their respective directors, executive officers
and other members of their management may be soliciting proxies from their
respective shareholders in favor of the merger. Information concerning persons
who may be considered participants in the solicitation of Citizens' shareholders
under the rules of the SEC is set forth in the Proxy Statement filed by Citizens
with the SEC on March 22, 2006, and information concerning persons who may be
considered participants in the solicitation of Republic's shareholders under the
rules of the SEC is set forth in the Proxy Statement filed by Republic with the
SEC on March 14, 2006. Additional information regarding the interests of those
participants and other persons who may be deemed participants in the transaction
may be obtained by reading the joint proxy statement/prospectus regarding the
proposed merger when it becomes available. You may obtain free copies of these
documents as described above.

      This communication shall not constitute an offer to sell or the
solicitation of an offer to buy securities, nor shall there be any sale of
securities in any jurisdiction in which such solicitation or sale would be
unlawful prior to the registration or qualification under the securities laws of
such jurisdiction.

Forward - Looking Statements

      Discussions in this Current Report on Form 8-K that are not statements of
historical fact (including statements that include terms such as "will," "may,"
"should," "believe," "expect," "anticipate," "estimate," "intend," and "plan")
are forward-looking statements that involve risks and uncertainties. Any
forward-looking statement is not a guarantee of future performance and actual
results could differ materially from those contained in the forward-looking
information. Such forward-looking statements include, but are not limited to,
statements about the benefits of the business combination transaction involving
Citizens and Republic, including future financial and operating results, the new
company's plans, objectives, expectations and intentions and other statements
that are not historical facts.

      The following factors, among others, could cause actual results to differ
from those set forth in the forward-looking statements: the ability to obtain
regulatory approvals of the transaction on the proposed terms and schedule; the
failure of Citizens or Republic shareholders to approve the transaction; the
risk that the businesses will not be integrated successfully; deposit attrition
and disruption from the transaction making it more difficult to maintain
relationships with customers, employees or suppliers; the risk that the cost
savings and any other synergies from the transaction may not be fully realized
or may take longer to realize than expected; competition and its effect on
pricing, spending, third-party relationships and revenues; movements in market
interest rates and secondary market volatility; divestitures assumed and/or
required; potential conditions that may affect the tax-free status of the
Republic stock exchange for Citizens' common shares; and unfavorable changes in
economic and business conditions or the regulatory environment. Additional
factors that may affect future results are contained in Citizens' and Republic's
filings with the SEC, which are available at the SEC's web site
http://www.sec.gov. Citizens and Republic disclaim any obligation to update and
revise statements contained in these materials based on new information or
otherwise.

Item 9.01   Financial Statements and Exhibits.

      (d)   Exhibits

     2.1      Agreement and Plan of Merger by and between Republic Bancorp Inc.
              and Citizens Banking Corporation, dated as of June 26, 2006.



                                  SIGNATURES

   Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

Date:  June 30, 2006                     REPUBLIC BANCORP INC.


                                         By:        /s/ Thomas F. Menacher
                                                  ------------------------------
                                         Name:    Thomas F. Menacher
                                         Its:     Executive Vice President,
                                                  Treasurer and Chief Financial
                                                  Officer



                                EXHIBIT INDEX

                                                                 Paper (P) or
 Exhibit No.                    Description                     Electronic (E)
------------- ------------------------------------------------  --------------
     2.1      Agreement and Plan of Merger by and between             E
              Republic Bancorp Inc. and Citizens Banking
              Corporation, dated as of June 26, 2006.