CUSIP NO. 929740108                    13G                          PAGE 1 OF 10
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                       SECURITIES AND EXCHANGE COMMISSION

                              Washington, DC 20549

                                  SCHEDULE 13G

                                 (Rule 13d-102)

            INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
           TO RULES 13d-1(b)(c), AND (d) AND AMENDMENTS THERETO FILED
                            PURSUANT TO RULE 13d-2(b)
                                (Amendment No. )*

                               Wabtec Corporation

                                (Name of Issuer)

                                  Common Stock

                         (Title of Class of Securities)

                                    929740108

                                 (CUSIP Number)

                                December 29, 2000
             (Date of Event Which Requires Filing of this Statement)

Check the  appropriate box to designate the rule pursuant to which this Schedule
is filed:

     [X]  Rule 13d-1(b)
     [ ]  Rule 13d-1(c)
     [ ]  Rule 13d-1(d)

- ---------------
     * The  remainder  of this cover  page  shall be filled out for a  reporting
person's  initial  filing on this  form with  respect  to the  subject  class of
securities,  and for any subsequent amendment containing information which would
alter the disclosures provided in a prior cover page.

     The  information  required in the remainder of this cover page shall not be
deemed to be "filed"  for the purpose of Section 18 of the  Securities  Exchange
Act of 1934 or otherwise  subject to the  liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes.)

CUSIP NO. 929740108 13G PAGE 2 OF 10 - ------------------- --- ------------ ******************************************************************************* 1. NAME OF REPORTING PERSON, S.S. OR I.R.S. IDENTIFICATION NO.OF ABOVE PERSON The Baupost Group, L.L.C., 04-3402144 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP * (a) (b) X 3. SEC USE ONLY 4. CITIZENSHIP OR PLACE OF ORGANIZATION The Commonwealth of Massachusetts NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON: 5. WITH SOLE VOTING POWER 2,232,100 6. WITH SHARED VOTING POWER 0 7. WITH SOLE DISPOSITIVE POWER 2,232,100 8. WITH SHARED DISPOSITIVE POWER 0 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,232,100 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES * 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.21% 12. TYPE OF REPORTING PERSON * IA

CUSIP NO. 929740108 13G PAGE 3 OF 10 - ------------------- --- ------------ ******************************************************************************* 1. NAME OF REPORTING PERSON, S.S. OR I.R.S. IDENTIFICATION NO.OF ABOVE PERSON SAK Corporation, 04-3334541 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP * (a) (b) X 3. SEC USE ONLY 4. CITIZENSHIP OR PLACE OF ORGANIZATION The Commonwealth of Massachusetts NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON: 5. WITH SOLE VOTING POWER 0 6. WITH SHARED VOTING POWER 0 7. WITH SOLE DISPOSITIVE POWER 0 8. WITH SHARED DISPOSITIVE POWER 0 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES * 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.00% 12. TYPE OF REPORTING PERSON * HC

CUSIP NO. 929740108 13G PAGE 4 OF 10 - ------------------- --- ------------ ******************************************************************************* 1. NAME OF REPORTING PERSON, S.S.OR I.R.S. IDENTIFICATION NO.OF ABOVE PERSON Seth A. Klarman, ###-##-#### 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP * (a) (b) X 3. SEC USE ONLY 4. CITIZENSHIP OR PLACE OF ORGANIZATION United States of America NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON: 5. WITH SOLE VOTING POWER 0 6. WITH SHARED VOTING POWER 0 7. WITH SOLE DISPOSITIVE POWER 0 8. WITH SHARED DISPOSITIVE POWER 0 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES * 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.00% 12. TYPE OF REPORTING PERSON * HC

CUSIP NO. 929740108 13G PAGE 5 OF 10 - ------------------- --- ------------ ******************************************************************************* Item 1 (a) Name of Issuer: Wabtec Corporation 1(b) Address of Issuer's Principal Executive Offices: 1001 Air Brake Avenue, Wilmerding, PA 15148 Item 2 (a) Name of Person Filing: (1) The Baupost Group, L.L.C. (2) SAK Corporation (3) Seth A. Klarman 2(b) Address of Principal Business Offices or, if none, Residence: (1) The Baupost Group, L.L.C. 44 Brattle Street, 5th Floor Cambridge, Massachusetts 02138 (2) SAK Corporation 44 Brattle Street, 5th Floor Cambridge, Massachusetts 02138 (3) Seth A. Klarman 44 Brattle Street, 5th Floor Cambridge, Massachusetts 02138 2(c) Citizenship: (1) The Commonwealth of Massachusetts (2) The Commonwealth of Massachusetts (3) United States of America 2(d) Title of Class of Securities: Common Stock 2(e) CUSIP Number: 929740108

CUSIP NO. 929740108 13G PAGE 6 OF 10 - ------------------- --- ------------ Item 3 If this statement is filed pursuant to SS240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a: (a) [ ]Broker or Dealer registered under Section 15 of the Act (15 U.S.C. 78o). (b) [ ]Bank as defined in Section 3(a)(6) of the Act (15 U.S.C. 78c). (c) [ ]Insurance Company as defined in Section 3(a)(19) of the Act (15 U.S.C. 78c). (d) [ ]Investment Company registered under Section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8). (e) [X]An investment advisor in accordance with S240.13d-1(b)(1)(ii)(E). (f) [ ]An employee benefit plan or endowment fund in accordance with S240.13d-1(b)(1)(ii)(F). (g) [X]A parent holding company or control person in accordance with S240.13d-1(b)(ii)(G). (h) [ ]A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813). (i) [ ] A church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act of 1940 (15 U. S.C. 80a-3). (j) [ ]Group, in accordance with S240.13d-1(b)(1)(ii)(J). Item 4 Ownership: Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1. (a) Amount Beneficially Owned: (as of December 29, 2000) (1) The Baupost Group, L.L.C.: 2,232,100 (2) SAK Corporation: 0 (3) Seth A. Klarman: 0

CUSIP NO. 929740108 13G PAGE 7 OF 10 - ------------------- --- ------------ (b) Percent of Class: (1) The Baupost Group, L.L.C.: 5.21% (2) SAK Corporation: 0.00% (3) Seth A. Klarman: 0.00% (c) Number of shares as to which such person has: (i) sole power to vote or to direct the vote (1) The Baupost Group, L.L.C.: 2,232,100 (2) SAK Corporation: 0 (3) Seth A. Klarman: 0 (ii) shared power to vote or to direct the vote --- 0 (iii)sole power to dispose or to direct the disposition of (1) The Baupost Group, L.L.C.: 2,232,100 (2) SAK Corporation: 0 (3) Seth A. Klarman: 0 (iv) shared power to dispose or to direct the disposition of --- 0 Instruction: For computations regarding securities which represent a right to acquire an underlying security seess.240.13d-3(d)(1).

CUSIP NO. 929740108 13G PAGE 8 OF 10 - ------------------- --- ------------ Item 5 Ownership of Five Percent or Less of a Class: If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following [ ]. Instruction: Dissolution of a group requires a response to this item. Item 6 Ownership of More than Five Percent on behalf of Another Person: The Baupost Group, L.L.C. ("Baupost") is a registered investment adviser. SAK Corporation is the Manager of Baupost. Seth A. Klarman, as the sole Director of SAK Corporation and a controlling person of Baupost, may be deemed to have beneficial ownership under Section 13(d) of the securities beneficially owned by Baupost. Securities reported on this Schedule 13G as being beneficially owned by Baupost include securities purchased on behalf of a registered investment company and various limited partnerships. Item 7 Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company: See attached Exhibit A Item 8 Identification and Classification of members of the Group: N/A Item 9 Notice of Dissolution of Group: N/A

CUSIP NO. 929740108 13G PAGE 9 OF 10 - ------------------- --- ------------ Item 10 Certification: By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired in the ordinary course of business and were not acquired for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect. Signature After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. February 14, 2001 Date THE BAUPOST GROUP, L.L.C. By: /s/ Seth A. Klarman Seth . Klarman President SAK CORPORATION By: /s/ Seth A. Klarman Seth A. Klarman President SETH A. KLARMAN By: /s/ Seth A. Klarman Seth A. Klarman

CUSIP NO. 929740108 13G PAGE 10 OF 10 - ------------------- --- ------------- EXHIBIT A Item 3 (1) The Baupost Group, L.L.C. IA (2) SAK Corporation HC (3) Seth A. Klarman HC The Baupost Group, L.L.C. ("Baupost") is a registered investment adviser. SAK Corporation is the Manager of Baupost. Seth A. Klarman, as the sole Director of SAK Corporation and a controlling person of Baupost, may be deemed to have beneficial ownership under Section 13(d) of the securities beneficially owned by Baupost. Securities reported on this Schedule 13G as being beneficially owned by Baupost include securities purchased on behalf of a registered investment company and various limited partnerships. 10