1



      AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON MARCH 7, 2001

                                                     REGISTRATION NO. 333- 48946


                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

      POST-EFFECTIVE AMENDMENT NO. 2 ON FORM S-8 TO REGISTRATION STATEMENT
                  ON FORM S-4 UNDER THE SECURITIES ACT OF 1933


                              M&T BANK CORPORATION
- --------------------------------------------------------------------------------
             (Exact name of registrant as specified in its charter)

New York                                                              16-0968385
- -------------------------------                              -------------------
(State or other jurisdiction of                                 (I.R.S. Employer
incorporation or organization)                               Identification No.)


                                  ONE M&T PLAZA
                             BUFFALO, NEW YORK 14203
- --------------------------------------------------------------------------------
          (Address, including zip code, of principal executive offices)

    PROGRESSIVE BANK, INC. 1993 NON-QUALIFIED STOCK OPTION PLAN FOR DIRECTORS
    PREMIER NATIONAL BANCORP, INC. 1995 INCENTIVE STOCK PLAN (AS AMENDED AND
                        RESTATED EFFECTIVE MAY 13, 1999)
             PROGRESSIVE BANK, INC. 1997 EMPLOYEE STOCK OPTION PLAN
     PROGRESSIVE BANK, INC. INCENTIVE STOCK OPTION PLAN AMENDED AND RESTATED

- --------------------------------------------------------------------------------
                            (Full title of the plans)

                           RICHARD A. LAMMERT, ESQUIRE
                    SENIOR VICE PRESIDENT AND GENERAL COUNSEL
                              M&T BANK CORPORATION
                                  ONE M&T PLAZA
                             BUFFALO, NEW YORK 14203
- --------------------------------------------------------------------------------
                     (Name and address of agent for service)

                                 (716) 842-5390
- --------------------------------------------------------------------------------
          (telephone number, including area code, of agent for service)


                                    COPY TO:
                               STEVEN KAPLAN, ESQ.
                                 ARNOLD & PORTER
                              555 12TH STREET, N.W.
                             WASHINGTON, D.C. 20004
                                 (202) 942-5998



   2






                                     PART II
               INFORMATION REQUIRED IN THE REGISTRATION STATEMENT


        This Post-Effective Amendment No. 2 on Form S-8 to the Registration
Statement on Form S-4 (File No. 333-48946) (the "Registration Statement") of M&T
Bank Corporation is being filed to reflect the fact that certain of the 224,800
shares of M&T common stock registered under the Post-Effective Amendment No. 1
on Form S-8 to the Registration Statement relate to options offered under an
additional plan, the Progressive Bank, Inc. 1997 Employee Stock Option Plan, not
listed in Post-Effective Amendment No. 1.




                                      II-1
   3


                                   SIGNATURES

        Pursuant to the requirements of the Securities Act of 1933, M&T
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form S-8 and has duly caused this Post-Effective
Amendment No. 2 on Form S-8 to Registration Statement on Form S-4 to be signed
on its behalf by the undersigned, thereunto duly authorized, in the City of
Buffalo, State of New York, on March 7, 2001.

                                             M&T BANK CORPORATION



                                             By:    /s/ Michael P. Pinto
                                                    ----------------------------
                                                    Michael P. Pinto
                                                    Executive Vice President and
                                                    Chief Financial Officer


        Pursuant to the requirements of the Securities Act of 1933, this
Post-Effective Amendment No. 2 on Form S-8 to Registration Statement on Form S-4
has been signed by the following persons in the capacities indicated on March 7,
2001:

Signature Title * Chairman of the Board, President and Chief - --------------------------- Executive Officer (Principal Executive Officer) Robert G. Wilmers /s/ Michael P. Pinto Executive Vice President and Chief Financial - --------------------------- Officer (Principal Financial Officer) Michael P. Pinto /s/ Michael R. Spychala Senior Vice President and Controller (Principal - --------------------------- Accounting Officer) Michael R. Spychala * - --------------------------- Director William F. Allyn * - --------------------------- Director Brent D. Baird * - --------------------------- Director John H. Benisch
II-2 4 * - --------------------------- Director Robert J. Bennett * - --------------------------- Director C. Angela Bontempo * - --------------------------- Director Robert T. Brady * - --------------------------- Director Patrick J. Callan - --------------------------- Vice Chairman of the Board Carl L. Campbell * - --------------------------- Director R. Carlos Carballada - --------------------------- Director T. Jefferson Cunningham III - --------------------------- Director Donald Devorris * - --------------------------- Director Richard E. Garman * - --------------------------- Director James V. Glynn * - --------------------------- Director Daniel R. Hawbaker * - --------------------------- Director Patrick W.E. Hodgson * - --------------------------- Director Samuel T. Hubbard, Jr. * - --------------------------- Director Richard G. King * - --------------------------- Director Reginald B. Newman, II * - --------------------------- Director Peter J. O'Donnell, Jr.
II-3 5 * - --------------------------- Director Jorge G. Pereira * - --------------------------- Director Robert E. Sadler, Jr. * - --------------------------- Director Stephen G. Sheetz * - --------------------------- Director John L. Vensel * - --------------------------- Director Herbert L. Washington
* By /s/ Richard A. Lammert March 7, 2001 ----------------------- (Attorney-in-fact) II-4 6 INDEX TO EXHIBITS Exhibit 4.1 Progressive Bank, Inc. 1993 Non-Qualified Stock Option Plan for Directors, incorporated by reference to Exhibit 10.9 to the Annual Report on Form 10-K, for the fiscal year ended December 31, 1994, file No. 0-15025, of Progressive Bank, Inc. Exhibit 4.2 Premier National Bancorp, Inc. 1995 Incentive Stock Plan (as amended and restated effective May 13, 1999), incorporated by reference to Exhibit 10.4 to Premier's Annual Report on Form 10-K for the year ended December 31, 1999, file No. 1-13213. Exhibit 4.3 Progressive Bank, Inc. 1997 Employee Stock Option Plan, incorporated by reference to Exhibit 99.1 to the Form S-8 Registration Statement under the Securities Act of 1933, file No. 333-25931, of Progressive Bank, Inc., filed on April 25, 1997. Exhibit 4.4 Progressive Bank, Inc. Incentive Stock Option Plan Amended and Restated, incorporated by reference to Exhibit 10-2 to the Annual Report on Form 10-K, file No. 0-15025 of Progressive Bank Inc., filed on March 22, 1988. Exhibit 5 Opinion of Richard A. Lammert, Esq., filed herewith. Exhibit 23.1 Consent of Richard A. Lammert, Esq., included in the opinion filed as Exhibit 5 hereto. Exhibit 23.2 Consent of PricewaterhouseCoopers LLP, previously filed. Exhibit 23.3 Consent of Ernst & Young LLP, previously filed. Exhibit 24 Powers of Attorney of certain directors and officers of M&T, previously filed as Exhibit 24 to the Registration Statement on Form S-4 (File No. 333-48946) by M&T Bank Corporation. II-5
   1


                                                                       Exhibit 5

                              M&T Bank Corporation
                                  One M&T Plaza
                             Buffalo, New York 14203

                                                                   March 7, 2001
Board of Directors
M&T Bank Corporation
One M&T Plaza
Buffalo, New York 14203

Ladies and Gentlemen:

        Reference is made to the Post-Effective Amendment No. 1 and 2 on Form
S-8 to the Registration Statement on Form S-4 (File No. 333-48946) (the
"Registration Statement") of M&T Bank Corporation (the "Corporation") related to
224,800 shares of the Corporation's common stock, par value $0.50 per share
("Common Stock"), which are to be offered pursuant to stock options granted
under the following stock option plans (the "Plans"), plus the number of shares,
if any, that may be granted under reload rights contained in certain options
granted under the Plans:

        -       Progressive Bank, Inc. 1993 Non-Qualified Stock Option Plan for
                Directors
        -       Premier National Bancorp, Inc. 1995 Incentive Stock Plan (as
                amended and restated effective May 13, 1999)
        -       Progressive Bank, Inc. 1997 Employee Stock Option Plan
        -       Progressive Bank, Inc. Incentive Stock Option Plan Amended and
                Restated

        I have been requested to furnish an opinion to be included as Exhibit 5
to the Registration Statement. In conjunction with the furnishing of this
opinion, I have examined such corporate documents and have made such
investigation of matters of fact and law as I have deemed necessary to render
this opinion.

        I am admitted to practice law in the State of New York and do not
purport to be an expert on or to express any opinion on any laws other than the
laws of the State of New York and the federal laws of the United States of
America. This opinion speaks as of today's date and is limited to present
statutes, regulations and judicial interpretations. In rendering this opinion, I
assume no obligation to revise or supplement this opinion should the present
laws be changed by legislative or regulatory action, judicial decision or
otherwise.


                                      II-6
   2

        Based upon such examination and investigation, and upon the assumptions
that there will be no material changes in the documents examined and matters
investigated and that at the time of issuance there will be authorized but
unissued shares of Common Stock available to the Corporation in sufficient
amounts, I am of the opinion that the shares of Common Stock referred to above
have been duly authorized by the Corporation and that, when issued in accordance
with the terms of the Plans and for an amount that is not less than the
applicable par value of the Common Stock at the time of issuance, will be
legally issued, fully paid and non-assessable. I consent to the filing of this
opinion as Exhibit 5 to the Registration Statement.

        This letter does not address any matters other than those expressly
addressed herein. This letter is given for your sole benefit and use. No one
else is entitled to rely hereupon.



                                       Very truly yours,

                                       /s/ Richard A. Lammert

                                       Richard A. Lammert
                                       Senior Vice President and General Counsel


                                      II-7