SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                              --------------------

                                   SCHEDULE TO

                                 (Rule 14d-100)

           TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1)
                     OF THE SECURITIES EXCHANGE ACT OF 1934

                                (Amendment No. 4)

                        WILTEL COMMUNICATIONS GROUP, INC.
                       (Name of Subject Company (Issuer))

                          LEUCADIA NATIONAL CORPORATION
                                       and
                           WRANGLER ACQUISITION CORP.,
                  a subsidiary of Leucadia National Corporation
                      (Name of Filing Persons - (Offerors))

                     COMMON STOCK, PAR VALUE $0.01 PER SHARE
                         (Title of Class of Securities)

                                    972487102
                      (CUSIP Number of Class of Securities)

                                Joseph A. Orlando
                          Leucadia National Corporation
                              315 Park Avenue South
                            New York, New York 10010
                            Telephone: (212) 460-1900

                  (Name, Address and Telephone Number of Person
   Authorized to Receive Notice and Communications on Behalf of Filing Person)

                                   COPIES TO:

                            Andrea A. Bernstein, Esq.
                             Malcolm E. Landau, Esq.
                           Weil, Gotshal & Manges LLP
                                767 Fifth Avenue
                          New York, New York 10153-0119
                            Telephone: (212) 310-8000
                              --------------------

         Check the appropriate boxes below to designate any transactions to
which the statement relates:

   [X]  third-party tender offer subject to Rule 14d-1.
   [ ]  issuer tender offer subject to Rule 13e-4.
   [ ]  going-private transaction subject to Rule 13e-3.
   [X]  amendment to Schedule 13D under Rule 13d-2.

         Check the following box if the filing is a final amendment reporting
the results of the tender offer: [ ]









                                                                         
---------------------------------------------------------              -----------------------------------------------
CUSIP No. 972487102                                           13D
---------------------------------------------------------              -----------------------------------------------

----------------------------------------------------------------------------------------------------------------------
     1        NAME OF REPORTING PERSON:                          Leucadia National Corporation
              --------------------------------------------------------------------------------------------------------
              S.S. OR I.R.S. IDENTIFICATION NO.

              OF ABOVE PERSON:
----------------------------------------------------------------------------------------------------------------------
     2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP:                                               (a) [x]
                                                                                                              (b) [ ]
----------------------------------------------------------------------------------------------------------------------
     3        SEC USE ONLY
----------------------------------------------------------------------------------------------------------------------
     4        SOURCE OF FUNDS:                N/A
----------------------------------------------------------------------------------------------------------------------
     5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):             [ ]
----------------------------------------------------------------------------------------------------------------------
     6        CITIZENSHIP OR PLACE OF ORGANIZATION:              New York
----------------------------------------------------------------------------------------------------------------------
      NUMBER OF           7     SOLE VOTING POWER:                              1,700,000

        SHARES
                        ----------------------------------------------------------------------------------------------
     BENEFICIALLY         8     SHARED VOTING POWER:                           22,000,000

       OWNED BY
                        ----------------------------------------------------------------------------------------------
         EACH             9     SOLE DISPOSITIVE POWER:                         1,700,000

      REPORTING
                        ----------------------------------------------------------------------------------------------
     PERSON WITH          10    SHARED DISPOSITIVE POWER:                      22,700,000
----------------------------------------------------------------------------------------------------------------------
     11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY REPORTING PERSON:         23,700,000
----------------------------------------------------------------------------------------------------------------------
     12       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES:                              [ ]
----------------------------------------------------------------------------------------------------------------------
     13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11):                                       47.40%
----------------------------------------------------------------------------------------------------------------------
     14       TYPE OF REPORTING PERSON:                          CO
----------------------------------------------------------------------------------------------------------------------



                                       2









                                                                         
---------------------------------------------------------              -----------------------------------------------
CUSIP No. 972487102                                           13D
---------------------------------------------------------              -----------------------------------------------

----------------------------------------------------------------------------------------------------------------------
     1        NAME OF REPORTING PERSON:                          LUK Acquisition I, LLC
              --------------------------------------------------------------------------------------------------------
              S.S. OR I.R.S. IDENTIFICATION NO.

              OF ABOVE PERSON:
----------------------------------------------------------------------------------------------------------------------
     2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP:                                               (a) [x]
                                                                                                              (b) [ ]
----------------------------------------------------------------------------------------------------------------------
     3        SEC USE ONLY
----------------------------------------------------------------------------------------------------------------------
     4        SOURCE OF FUNDS:                N/A
----------------------------------------------------------------------------------------------------------------------
     5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):             [ ]
----------------------------------------------------------------------------------------------------------------------
     6        CITIZENSHIP OR PLACE OF ORGANIZATION:              Delaware
----------------------------------------------------------------------------------------------------------------------
      NUMBER OF           7     SOLE VOTING POWER:                            -0-

        SHARES
                        ----------------------------------------------------------------------------------------------
     BENEFICIALLY         8     SHARED VOTING POWER:                           11,775,000

       OWNED BY
                        ----------------------------------------------------------------------------------------------
         EACH             9     SOLE DISPOSITIVE POWER:                        -0-

      REPORTING
                        ----------------------------------------------------------------------------------------------
     PERSON WITH          10    SHARED DISPOSITIVE POWER:                      11,775,000
----------------------------------------------------------------------------------------------------------------------
     11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY REPORTING PERSON:         11,775,000
----------------------------------------------------------------------------------------------------------------------
     12       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES:                              [ ]
----------------------------------------------------------------------------------------------------------------------
     13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11):                                       23.55%
----------------------------------------------------------------------------------------------------------------------
     14       TYPE OF REPORTING PERSON:                          00               (Limited Liability Company)
----------------------------------------------------------------------------------------------------------------------



                                       3












                                                                         
---------------------------------------------------------              -----------------------------------------------
CUSIP No. 972487102                                           13D
---------------------------------------------------------              -----------------------------------------------

----------------------------------------------------------------------------------------------------------------------
       1          NAME OF REPORTING PERSON:                          LUK Acquisition II, LLC
                  ----------------------------------------------------------------------------------------------------
                  S.S. OR I.R.S. IDENTIFICATION NO.

                  OF ABOVE PERSON:
----------------------------------------------------------------------------------------------------------------------
       2          CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP:                                           (a) [x]
                                                                                                              (b) [ ]
----------------------------------------------------------------------------------------------------------------------
       3          SEC USE ONLY
----------------------------------------------------------------------------------------------------------------------
       4          SOURCE OF FUNDS:                N/A
----------------------------------------------------------------------------------------------------------------------
       5          CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):         [ ]
----------------------------------------------------------------------------------------------------------------------
       6          CITIZENSHIP OR PLACE OF ORGANIZATION:              Delaware
----------------------------------------------------------------------------------------------------------------------
        NUMBER OF             7     SOLE VOTING POWER:                            -0-

          SHARES
                        ----------------------------------------------------------------------------------------------
       BENEFICIALLY           8     SHARED VOTING POWER:                          10,225,000

         OWNED BY
                        ----------------------------------------------------------------------------------------------
           EACH               9     SOLE DISPOSITIVE POWER:                       -0-

        REPORTING
                        ----------------------------------------------------------------------------------------------
       PERSON WITH            10    SHARED DISPOSITIVE POWER:                     10,225,000
----------------------------------------------------------------------------------------------------------------------
       11         AGGREGATE AMOUNT BENEFICIALLY OWNED BY REPORTING PERSON:        10,225,000
----------------------------------------------------------------------------------------------------------------------
       12         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES:                          [ ]
----------------------------------------------------------------------------------------------------------------------
       13         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11):                                  20.45%
----------------------------------------------------------------------------------------------------------------------
       14         TYPE OF REPORTING PERSON:                          00           (Limited Liability Company)
----------------------------------------------------------------------------------------------------------------------




                                       4







                                   SCHEDULE TO

              This Amendment No. 4 (this "Amendment") amends and/or supplements
the Tender Offer Statement on Schedule TO filed with the Securities and Exchange
Commission (the "SEC") on September 4, 2003, as heretofore amended and/or
supplemented (as so amended and supplemented, the "Schedule TO"), by Leucadia
National Corporation ("Leucadia") and its subsidiary, Wrangler Acquisition Corp.
("Merger Sub"), relating to the offer (the "Offer") by Leucadia to exchange (i)
0.4242 of a common share of Leucadia (the "Leucadia Shares") and (ii) one
Contingent Sale Right for each outstanding share of common stock of WilTel
Communications Group, Inc. ("WilTel") not already beneficially owned by
Leucadia, upon the terms and subject to the conditions set forth in the
Prospectus (as defined below) and the related Letter of Transmittal.

              The Offer is made pursuant to an Agreement and Plan of Merger,
dated as of August 21, 2003, by and among Leucadia, Merger Sub and WilTel, which
contemplates the merger of Merger Sub with and into WilTel (the "Merger").
Leucadia has filed with the SEC a registration statement on Form S-4 (as amended
from time to time, the "Registration Statement") relating to the Leucadia Shares
to be issued to stockholders of WilTel in the Offer and the Merger. The terms
and conditions of the Offer and the Merger are set forth in the offer to
exchange/prospectus which is part of the Registration Statement (as amended
and/or supplemented from time to time, the "Prospectus") and the related Letter
of Transmittal.

              All of the information set forth (or incorporated by reference) in
the Registration Statement, the Prospectus and the related Letter of Transmittal
is hereby incorporated by reference in response to all the items of the Schedule
TO.

ITEM 11. ADDITIONAL INFORMATION.

              The Schedule TO is hereby amended and supplemented by adding the
following thereto:

              On October 30, 2003, Leucadia issued a press release announcing
the extension of the expiration date of the Offer to 5:00 p.m., New York City
time, on Wednesday, November 5, 2003. The full text of the press release, which
is an Exhibit hereto, is incorporated herein by reference.

ITEM 12. EXHIBITS.

(a)(1) Prospectus, dated September 4, 2003, as amended on October 31, 2003
(incorporated by reference from Amendment No. 1 to Leucadia's Registration
Statement on Form S-4 (SEC File No. 333-108519)).

(a)(2) Letter of Transmittal*

(a)(3) Letter to Brokers, Dealers, Commercial Banks, Trust Companies and other
Nominees*

(a)(4) Letter to Clients for use by Brokers, Dealers, Commercial Banks, Trust
Companies and other Nominees*

(a)(5) Guidelines for Certification of Taxpayer Identification Number on
Substitute Form W-9*

(a)(6) Text of press release issued by Leucadia and WilTel announcing the
commencement of the Offer*

(a)(7) Text of press release issued by Leucadia on October 2, 2003, announcing
extension of the Offer and notification of early termination of the waiting
period under the Hart-Scott-Rodino Antitrust Improvement Act**

(a)(8) Text of press release issued by Leucadia on October 16, 2003, announcing
extension of the Offer**

(a)(9) Text of press release issued by Leucadia on October 30, 2003, announcing
extension of the Offer**

(b) None

(c)(1) Opinion of J.P. Morgan Securities Inc. (filed as an exhibit to WilTel's
Solicitation/Recommendation Statement on Schedule 14D-9 filed with the SEC)

(d)(1) Agreement and Plan of Merger, dated as of August 21, 2003, by and among
Leucadia, Merger Sub and WilTel (filed as Exhibit 2.1 to the Current Report on
Form 8-K filed by Leucadia on August 22, 2003)

(d)(2) Stockholders Agreement, dated as of October 15, 2002, between Leucadia
and WilTel (filed as Exhibit 99.6 to the Current Report on Form 8-K filed by
WilTel on October 24, 2002)



                                       5







(d)(3) Registration Rights Agreement, dated as of October 15, 2002, between
Leucadia and WilTel (filed as Exhibit 99.10 to the Current Report on Form 8-K
filed by WilTel on October 24, 2002)

(d)(4) Stockholders Rights and Co-Sale Agreement, dated as of October 15, 2002,
between Leucadia and WilTel (filed as Exhibit 99.11 to the Current Report on
Form 8-K filed by WilTel on October 24, 2002)

(d)(5) Restructuring Services Agreement, dated as of October 15, 2002, between
Leucadia and WilTel (filed as Exhibit 10.1 to the Current Report on Form 8-K
filed by WilTel on December 5, 2002)

(d)(6) Amendment, effective as of August 21, 2003, to the Stockholders Agreement
between Leucadia and WilTel**

(g) None

---------------------

*  Incorporated by reference to the Registration Statement.

** Previously filed.

                                       6











                                    SIGNATURE

         After due 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.

         Dated:  October 30, 2003

                                  LEUCADIA NATIONAL CORPORATION


                                  By: /s/ Joseph A. Orlando
                                      ----------------------
                                  Name:   Joseph A. Orlando
                                  Title:  Vice President and
                                          Chief Financial Officer




                                  WRANGLER ACQUISITION CORP.


                                  By: /s/ Joseph A. Orlando
                                      ----------------------
                                  Name:   Joseph A. Orlando
                                  Title:  President and
                                          Chief Financial Officer



                                       7








                                   SIGNATURE*

         After due 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.

         Dated:  October 30, 2003

                                  LUK Acquisition I, LLC


                                  By: /s/ Joseph A. Orlando
                                      ---------------------
                                  Name:   Joseph A. Orlando
                                  Title:  President


                                  LUK Acquisition II, LLC


                                  By: /s/ Joseph A. Orlando
                                      ----------------------
                                  Name:   Joseph A. Orlando
                                  Title:  President


     *These signatures are solely for the purpose of amending Schedule 13D.


                                       8