SECURITIES & EXCHANGE COMMISSION
                             Washington, D.C. 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 13d-2(b)

                            WESCO INTERNATIONAL, INC
                                (Name of Issuer)

                                  Common Stock
                         (Title of Class of Securities)

                                    95082P105
                                 (CUSIP Number)

                                  July 31, 2007
             (Date of event which requires filing of this statement)

      Check the appropriate box to designate the rule pursuant to which this
Schedule 13G is filed:

      |_|   Rule 13d-1(b)
      |X|   Rule 13d-1(c)
      |_|   Rule 13d-1(d)

                              (Page 1 of 15 Pages)

----------
      *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 purposes of Section 18 of the Securities Exchange Act
of 1934 ("Act") 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).



--------------------------------------------------------------------------------
1.    NAME OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

      The Ospraie Portfolio Ltd.
--------------------------------------------------------------------------------
2.    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP**                 (a) |_|
                                                                         (b) |X|

--------------------------------------------------------------------------------
3.    SEC USE ONLY


--------------------------------------------------------------------------------
4.    CITIZENSHIP OR PLACE OF ORGANIZATION

      Cayman Islands
--------------------------------------------------------------------------------
               5.    SOLE VOTING POWER

                     0
               -----------------------------------------------------------------
  NUMBER OF    6.    SHARED VOTING POWER
   SHARES
 BENEFICIALLY        2,578,100
  OWNED BY     -----------------------------------------------------------------
    EACH       7.    SOLE DISPOSITIVE POWER
  REPORTING
   PERSON            0
    WITH       -----------------------------------------------------------------
               8.    SHARED DISPOSITIVE POWER

                     2,578,100
--------------------------------------------------------------------------------
9.    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      2,578,100
--------------------------------------------------------------------------------
10.   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES** |_|


--------------------------------------------------------------------------------
11.   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      5.65%
--------------------------------------------------------------------------------
12.   TYPE OF REPORTING PERSON**

      CO
--------------------------------------------------------------------------------


                                       2


--------------------------------------------------------------------------------
1.    NAME OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

      Ospraie Management, LLC
--------------------------------------------------------------------------------
2.    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP**                 (a) |_|
                                                                         (b) |X|

--------------------------------------------------------------------------------
3.    SEC USE ONLY


--------------------------------------------------------------------------------
4.    CITIZENSHIP OR PLACE OF ORGANIZATION

      Delaware
--------------------------------------------------------------------------------
               5.    SOLE VOTING POWER

                     0
               -----------------------------------------------------------------
  NUMBER OF    6.    SHARED VOTING POWER
   SHARES
 BENEFICIALLY        2,578,100
  OWNED BY     -----------------------------------------------------------------
    EACH       7.    SOLE DISPOSITIVE POWER
  REPORTING
   PERSON            0
    WITH       -----------------------------------------------------------------
               8.    SHARED DISPOSITIVE POWER

                     2,578,100
--------------------------------------------------------------------------------
9.    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      2,578,100
--------------------------------------------------------------------------------
10.   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES** |_|


--------------------------------------------------------------------------------
11.   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      5.65%
--------------------------------------------------------------------------------
12.   TYPE OF REPORTING PERSON**

      OO
--------------------------------------------------------------------------------


                                       3


--------------------------------------------------------------------------------
1.    NAME OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

      Ospraie Holding I, L.P.
--------------------------------------------------------------------------------
2.    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP**                 (a) |_|
                                                                         (b) |X|

--------------------------------------------------------------------------------
3.    SEC USE ONLY


--------------------------------------------------------------------------------
4.    CITIZENSHIP OR PLACE OF ORGANIZATION

      Delaware
--------------------------------------------------------------------------------
               5.    SOLE VOTING POWER

                     0
               -----------------------------------------------------------------
  NUMBER OF    6.    SHARED VOTING POWER
   SHARES
 BENEFICIALLY        2,578,100
  OWNED BY     -----------------------------------------------------------------
    EACH       7.    SOLE DISPOSITIVE POWER
  REPORTING
   PERSON            0
    WITH       -----------------------------------------------------------------
               8.    SHARED DISPOSITIVE POWER

                     2,578,100
--------------------------------------------------------------------------------
9.    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      2,578,100
--------------------------------------------------------------------------------
10.   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES** |_|


--------------------------------------------------------------------------------
11.   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      5.65%
--------------------------------------------------------------------------------
12.   TYPE OF REPORTING PERSON**

      PN
--------------------------------------------------------------------------------


                                       4


--------------------------------------------------------------------------------
1.    NAME OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

      Ospraie Management, Inc.
--------------------------------------------------------------------------------
2.    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP**                 (a) |_|
                                                                         (b) |X|

--------------------------------------------------------------------------------
3.    SEC USE ONLY


--------------------------------------------------------------------------------
4.    CITIZENSHIP OR PLACE OF ORGANIZATION

      Delaware
--------------------------------------------------------------------------------
               5.    SOLE VOTING POWER

                     0
               -----------------------------------------------------------------
  NUMBER OF    6.    SHARED VOTING POWER
   SHARES
 BENEFICIALLY        2,578,100
  OWNED BY     -----------------------------------------------------------------
    EACH       7.    SOLE DISPOSITIVE POWER
  REPORTING
   PERSON            0
    WITH       -----------------------------------------------------------------
               8.    SHARED DISPOSITIVE POWER

                     2,578,100
--------------------------------------------------------------------------------
9.    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      2,578,100
--------------------------------------------------------------------------------
10.   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES** |_|


--------------------------------------------------------------------------------
11.   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      5.65%
--------------------------------------------------------------------------------
12.   TYPE OF REPORTING PERSON**

      CO
--------------------------------------------------------------------------------


                                       5


--------------------------------------------------------------------------------
1.    NAME OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

      Dwight Anderson
--------------------------------------------------------------------------------
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
--------------------------------------------------------------------------------
               5.    SOLE VOTING POWER

                     0
               -----------------------------------------------------------------
  NUMBER OF    6.    SHARED VOTING POWER
   SHARES
 BENEFICIALLY        2,578,100
  OWNED BY     -----------------------------------------------------------------
    EACH       7.    SOLE DISPOSITIVE POWER
  REPORTING
   PERSON            0
    WITH       -----------------------------------------------------------------
               8.    SHARED DISPOSITIVE POWER

                     2,578,100
--------------------------------------------------------------------------------
9.    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      2,578,100
--------------------------------------------------------------------------------
10.   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES** |_|


--------------------------------------------------------------------------------
11.   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      5.65%
--------------------------------------------------------------------------------
12.   TYPE OF REPORTING PERSON**

      IN
--------------------------------------------------------------------------------


                                       6


Item 1(a). Name of Issuer:

      The name of the issuer is WESCO INTERNATIONAL, INC. (the "Company")

Item 1(b). Address of Issuer's Principal Executive Offices:

      The Company's principal executive offices are located at 225 West Station
Square Drive, Suite 700, Pittsburgh, Pennsylvania 15219.

Item 2(a). Name of Person Filing:

      This statement is filed by:

          (i) The Ospraie Portfolio Ltd., a Cayman Islands exempted company
              ("Portfolio"), with respect to the Common Stock held by it;

         (ii) Ospraie Management, LLC, a Delaware limited liability company
              ("Investment Manager"), which serves as investment manager to
              Portfolio, with respect to the shares of Common Stock directly
              owned by Portfolio;

        (iii) Ospraie Holding I, L.P., a Delaware limited partnership ("Ospraie
              Holding"), which serves as the managing member of Investment
              Manager, with respect to the shares of Common Stock directly owned
              by Portfolio;

         (iv) Ospraie Management, Inc., a Delaware corporation ("Ospraie
              Management"), which serves as the general partner of Ospraie
              Holding, with respect to the shares of Common Stock directly owned
              by Portfolio; and

         (v)  Dwight Anderson ("Mr. Anderson"), the president and sole
              shareholder of Ospraie Management, with respect to the shares of
              Common Stock directly owned by Portfolio.

            The foregoing persons are hereinafter sometimes collectively
referred to as the "Reporting Persons." Any disclosures herein with respect to
persons other than the Reporting Persons are made on information and belief
after making inquiry to the appropriate party.

Item 2(b). Address of Principal Business Office or, if None, Residence:

      The address of the business office of each of the Reporting Persons other
than Portfolio is 320 Park Avenue, 27th Floor, New York, New York 10022, U.S.A.
The address of the office of Portfolio is c/o M&C Corporate Services Limited, PO
Box 309 GT, Ugland House, South Church Street, George Town, Grand Cayman, Cayman
Islands.

Item 2(c). Citizenship:

      Portfolio is a Cayman Islands exempted company. Investment Manager is a
limited liability company organized under the laws of the State of Delaware.
Ospraie Holding is a limited partnership organized under the laws of the State
of Delaware. Ospraie Management is a corporation organized under the laws of the
State of Delaware. Mr. Anderson is a United States citizen.

Item 2(d). Title of Class of Securities:


                                       7


      Common Stock.

Item 2(e). CUSIP Number:

      95082P105

Item 3. If this statement is filed pursuant to Rules 13d-1(b) or 13d-2(b) or
(c), check whether the person filing is a:

               (a)  |_| Broker or dealer registered under Section 15 of the Act,

               (b)  |_| Bank as defined in Section 3(a)(6) of the Act,

               (c)  |_| Insurance Company as defined in Section 3(a)(19) of the
                    Act,

               (d)  |_| Investment Company registered under Section 8 of the
                    Investment Company Act of 1940,

               (e)  |_| Investment Adviser in accordance with Rule 13d-1
                    (b)(1)(ii)(E),

               (f)  |_| Employee Benefit Plan or Endowment Fund in accordance
                    with 13d-1 (b)(1)(ii)(F),

               (g)  |_| Parent Holding Company or control person in accordance
                    with Rule 13d-1 (b)(1)(ii)(G),

               (h)  |_| Savings Association as defined in Section 3(b) of the
                    Federal Deposit Insurance Act,

               (i)  |_| Church Plan that is excluded from the definition of an
                    investment company under Section 3(c)(14) of the Investment
                    Company Act of 1940,

               (j)  |_| Group, in accordance with Rule 13d-1(b)(1)(ii)(J).

      If this statement is filed pursuant to Rule 13d-1(c), check the box. |X|

Item 4. Ownership.

A. The Ospraie Portfolio Ltd.

      (a) Amount beneficially owned: 2,578,100 shares of Common Stock. The
filing of this statement shall not be deemed an admission that Portfolio
beneficially owns any shares of Common Stock as determined under Section 13(d)
of the Securities Exchange Act of 1934 or the regulations promulgated
thereunder.

      (b) Percent of Class: 5.65%. The percentages used herein are calculated
based upon 45,602,703 shares of Common Stock outstanding, as reported in the
Company's Quarterly Statement on Form 10-Q filed on May 10, 2007.

      (c) Number of shares as to which such person has:


                                       8


            (i)   sole power to vote or direct the vote: 0
            (ii)  shared power to vote or direct the vote: 2,578,100
            (iii) sole power to dispose or direct the disposition: 0
            (iv)  shared power to dispose or direct the disposition: 2,578,100

B. Ospraie Management, LLC

      (a)   Amount beneficially owned: 2,578,100 shares of Common Stock.
      (b)   Percent of class: 5.65% (c) Number of shares as to which such person
            has:
            (i)   Sole power to vote or direct the vote: 0
            (ii)  Shared power to vote or direct the vote: 2,578,100
            (iii) Sole power to dispose or direct the disposition: 0
            (iv)  Shared power to dispose or direct the disposition: 2,578,100

C. Ospraie Holding I, L.P.

      (a)   Amount beneficially owned: 2,578,100 shares of Common Stock.
      (b)   Percent of class: 5.65%
      (c)   Number of shares as to which such person has:
            (i)   Sole power to vote or direct the vote: 0
            (ii)  Shared power to vote or direct the vote: 2,578,100
            (iii) Sole power to dispose or direct the disposition: 0
            (iv)  Shared power to dispose or direct the disposition: 2,578,100

D. Ospraie Management, Inc.

      (a)   Amount beneficially owned: 2,578,100 shares of Common Stock.
      (b)   Percent of class: 5.65%
      (c)   Number of shares as to which such person has:
            (i)   Sole power to vote or direct the vote: 0
            (ii)  Shared power to vote or direct the vote: 2,578,100
            (iii) Sole power to dispose or direct the disposition: 0
            (iv)  Shared power to dispose or direct the disposition: 2,578,100

E. Dwight Anderson

      (a)   Amount beneficially owned: 2,578,100 shares of Common Stock.
      (b)   Percent of class: 5.65%
      (c)   Number of shares as to which such person has:
            (i)   Sole power to vote or direct the vote: 0
            (ii)  Shared power to vote or direct the vote: 2,578,100
            (iii) Sole power to dispose or direct the disposition: 0
            (iv)  Shared power to dispose or direct the disposition: 2,578,100

Item 5. Ownership of Five Percent or Less of a Class.

      Not applicable.


                                       9


Item 6. Ownership of More than Five Percent on Behalf of Another Person.

Investment Manager, in its capacity as the investment manager to Portfolio, has
the power to direct the investment activities of Portfolio, including decisions
with respect to the disposition of the proceeds from the sale of Common Stock.
Ospraie Holding is the managing member of the Investment Manager and in that
capacity directs its operations. Ospraie Management is the general partner of
Ospraie Holding and in that capacity directs its operations. Mr. Anderson is the
president and sole shareholder of Ospraie Management and in that capacity,
directs its operations. The shareholders of Portfolio have the right to receive
dividends from, or proceeds from the sale of, shares of Common Stock held by
Portfolio in accordance with their ownership interests in Portfolio.

Item 7. Identification and Classification of the Subsidiary Which Acquired the
Security Being Reported on by the Parent Holding Company or Control Person.

      Not applicable.

Item 8. Identification and Classification of Members of the Group.

      See Item 2. The Reporting Persons disclaim the existence of a group with
one another.

Item 9. Notice of Dissolution of Group.

      Not applicable.

Item 10. Certification.

      Each of the Reporting Persons hereby makes the following certification:

            By signing below I certify that, to the best of my knowledge and
belief, the securities referred to above were not acquired and are not held 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.


                                       10


                                   SIGNATURES

After reasonable inquiry and to the best of our knowledge and belief, the
undersigned certify that the information set forth in this statement is true,
complete and correct.

DATED: August 2, 2007

                           OSPRAIE MANAGEMENT, LLC
                           By:Ospraie Holding I, L.P.,
                              its Managing Member

                           By:Ospraie Management, Inc.,
                              its General Partner


                           By:  /s/ Kirk Rule
                              --------------------------
                              Kirk Rule
                              Authorized Signatory

                           OSPRAIE HOLDING I, L.P.
                           By:Ospraie Management, Inc.,
                              its General Partner


                           By:  /s/ Kirk Rule
                              --------------------------
                              Kirk Rule
                              Authorized Signatory

                           OSPRAIE MANAGEMENT, INC.,


                           By: /s/ Kirk Rule
                              --------------------------
                              Kirk Rule
                              Authorized Signatory

                           THE OSPRAIE PORTFOLIO LTD.


                           By:Ospraie Management, LLC,
                              its Investment Manager

                           By:Ospraie Holding I, L.P.,
                              its Managing Member

                           By:Ospraie Management, Inc.,
                              its General Partner


                           By:/s/ Kirk Rule
                              --------------------------
                              Kirk Rule
                              Authorized Signatory


                                       11


                           DWIGHT ANDERSON


                           By:/s/ Kirk Rule
                              --------------------------
                              Kirk Rule, Attorney-in-fact


                                       12


                                  EXHIBIT INDEX

Exhibit 99.1 -    Joint Filing Agreement

Exhibit           99.2 - Power of Attorney, dated December 13, 2006, granted by
                  Dwight Anderson in favor of Kirk Rule, Eric Vincent and
                  Michael Fischer (incorporated by reference to Exhibit 99.1 of
                  the Schedule 13G filed by the reporting persons (other than
                  Portfolio) on December 29, 2006 with respect to Nova Biosource
                  Fuels, Inc.).


                                       13