UNITED STATES
                  SECURITIES AND 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
                             RULE 13d-2(b)

                           (AMENDMENT NO. 1)


                          IMCO RECYCLING INC.
                          -------------------
                           (Name of Issuer)

                     Common Stock, $0.10 par value
                     -----------------------------
                    (Title of Class of Securities)

                               449681105
                               ---------
                            (CUSIP Number)

                           December 31, 2003
                           -----------------
        (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 ("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).




CUSIP 449681105             SCHEDULE 13G             Page 2 of 5 Pages

 1    Name of Reporting Person     WENTWORTH, HAUSER & VIOLICH, INC.(1) 

      IRS Identification No. of Above Person

 2    Check the Appropriate Box if a member of a Group           (a)  [ ]

                                                                 (b)  [ ]

 3    SEC USE ONLY

 4    Citizenship or Place of Organization      WASHINGTON, UNITED STATES

   NUMBER OF        5    Sole Voting Power                              0
     SHARES
  BENEFICIALLY      6    Shared Voting Power                      991,080
 OWNED BY EACH
   REPORTING        7    Sole Dispositive Power                         0
  PERSON WITH
                    8    Shared Dispositive Power                 991,080

  9    Aggregate Amount Beneficially Owned by Each Reporting
       Person                                                     991,080

 10    Check Box if the Aggregate Amount in Row (9) Excludes Certain
       Shares                                                         [ ]

 11    Percent of Class Represented by Amount in Row 9               6.4%

 12    Type of Reporting Person                                        IA


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

    (1)This Schedule 13G Amendment No. 1 to the Schedule 13G filed with
the SEC via EDGAR on February 13, 2003 by Wentworth, Hauser & Violich, Inc.
and Laird Norton Financial Group, Inc. (the "Initial Schedule 13G") is
filed only as to Wentworth, Hauser & Violich, Inc., and does not amend
any of the information in the Initial Schedule 13G regarding Laird
Norton Financial Group, Inc.




CUSIP 449681105             SCHEDULE 13G             Page 3 of 5 Pages

Item 1(a).     Name of Issuer.

               IMCO Recycling Inc.

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

               5215 North O'Connor Blvd., Suite 1500
               Central Tower at Williams Square
               Irving, TX  75039

Item 2(a).     Name of Person Filing.

               Wentworth, Hauser & Violich, Inc. ("Wentworth")

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

               353 Sacramento Street, Suite 600
               San Francisco, CA  94111

Item 2(c).     Citizenship.

               Washington, United States

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

               Common Stock, $0.10 par value

Item 2(e).     CUSIP Number.

               449681105

Item 3.        Type of Reporting Person.

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

               (a) [ ] Broker or dealer registered under section 15
                       of the Exchange Act.

               (b) [ ] Bank as defined in section 3(a)(6) of the
                       Exchange Act.

               (c) [ ] Insurance company as defined in section
                       3(a)(19) of the Exchange Act.

               (d) [ ] Investment company registered under section 8
                       of the Investment Company Act of 1940.

               (e) [x] An investment adviser in accordance with Rule
                       13d-1(b)(1)(ii)(E);

               (f) [ ] An employee benefit plan or endowment fund in
                       accordance with Rule 13d-1(b)(1)(ii)(F);





CUSIP 449681105             SCHEDULE 13G             Page 4 of 5 Pages

              (g) [ ] A parent holding company or control person in
                       accordance with Rule 13d-1(b)(1)(ii)(G);

               (h) [ ] A savings association as defined in Section
                       3(b) of the Federal Deposit Insurance Act;

               (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;

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

Item 4.   Ownership.

          Reference is hereby made to Items 5-9 and 11 of page two (2)
of this Schedule 13G, which Items are incorporated by reference herein.

          Under the definition of "beneficial ownership" in Rule 13d-3
under the Securities Exchange Act of 1934, it is also possible that the
individual directors, executive officers, and/or shareholders of
Wentworth might be deemed the "beneficial owners" of some or all of the
securities to which this Schedule relates in that they might be deemed
to share the power to direct the voting or disposition of such
securities.  Neither the filing of this Schedule nor any of its
contents shall be deemed to constitute an admission that any of such
individuals is, for any purpose, the beneficial owner of any of the
securities to which this Schedule relates, and such beneficial
ownership is expressly disclaimed.

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

          Not applicable.

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

          Wentworth is deemed to be the beneficial owner of the number
of securities reflected in Items 5-9 and 11 of page two (2) of this
Schedule 13G pursuant to separate arrangements whereby Wentworth acts
as investment adviser to certain persons.  Each person for whom the
reporting person acts as investment adviser has the right to receive or
the power to direct the receipt of dividends from, or the proceeds from
the sale of, the Common Stock purchased or held pursuant to such
arrangements.

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

          Not applicable.





CUSIP 449681105             SCHEDULE 13G             Page 5 of 5 Pages

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

          Not applicable.

Item 9.   Notice of Dissolution of Group.

          Not applicable.

Item 10.  Certification.

          By signing below I certify that, to the best of my knowledge
and belief, the securities referred to above were acquired and are held
in the ordinary course of business and 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.



                               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.

                                 WENTWORTH, HAUSER & VIOLICH, INC.



                                 By:/s/ Bradford Hall
                                    ---------------------------------------
                                    Bradford Hall, Chief Compliance Officer


DATED:  February 5, 2004