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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13G

                    Under the Securities Exchange Act of 1934
                               (Amendment No. 4)*



                                 USA Truck, Inc.
--------------------------------------------------------------------------------
                                (Name of Issuer)

                                  Common Stock
--------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    902925106
--------------------------------------------------------------------------------
                                 (CUSIP Number)

                                November 23, 2007
--------------------------------------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:
[ ] Rule 13d-1(b)
[X] 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).


                                     Page 1


CUSIP No. 902925106

     1.   Names of Reporting Persons.
          I.R.S. Identification Nos. of above persons (entities only).

            GAM Holding AG
          -------------------
--------------------------------------------------------------------------------
     2.   Check the Appropriate Box if a Member of a Group (See Instructions)
          (a)      .............................................................
          (b)      .............................................................

     3.   SEC Use Only


     4.   Citizenship or Place of Organization

          Switzerland
          -----------

Number of               5.           Sole Voting Power
Shares
Beneficially            6.           Shared Voting Power
Owned by                              519,600
Each Reporting                       ----------
Person With*            7.           Sole Dispositive Power

                        8.           Shared Dispositive Power
                                       519,600
                                      ---------

     9. Aggregate Amount Beneficially Owned by Each Reporting Person

        519,600
        ------------

     10. Check if the Aggregate  Amount in Row (9) Excludes  Certain Shares
     (See Instructions)

     11. Percent of Class Represented by Amount in Row (9)

          4.52%
        ---------

     12. Type of Reporting Person (See Instructions)  HC
                                                     ----

*GAM Holding AG disclaims beneficial ownership of such securities.

Item 1.
        (a) Name of Issuer   USA Truck, Inc.
                             --------------

        (b) Address of Issuer's Principal Executive Offices
            3200 Industrial Park Road, Van Buren, Arkansas 72956

                                    Page 2


Item 2.
        (a) Name of Person Filing
            GAM Holding AG
            --------------
            Address of Principal Business Office or, if none, Residence
        (b) Klaustrasse 10, 8008 Zurich, Switzerland
            ----------------------------------------

        (c) Citizenship
            Switzerland
            ------------

        (d) Title of Class of Securities
            Common Stock
            --------------

        (e) CUSIP Number
            902925106
            ----------

Item  3.  If  this  statement  is  filed  pursuant  to   ss.ss.240.13d-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) An investment adviser in accordance
          withss.240.13d-1(b)(1)(ii)(E);

     [ ] (f) An  employee  benefit  plan  or  endowment  fund  in  accordance
          withss.240.13d-1(b)(1)(ii)(F);

     [ ] (g) A  parent  holding  company  or  control  person  in  accordance
          withss.240.13d-1(b)(1)(ii)(G);

     [ ] (h) A savings associations 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 withss.240.13d-1(b)(1)(ii)(J).


                                    Page 3



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:  519,600
                                                ---------
              (b)    Percent of class: 4.52%

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

                     (i) Sole power to vote or to direct the vote
                                                                           -------------
                     (ii) Shared power to vote or to direct the vote          519,600
                                                                           -------------
                     (iii) Sole power to dispose or to direct the
                           disposition of                                  -------------

                     (iv) Shared power to dispose or to direct the
                          disposition of                                      519,600
                                                                           -------------


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 [ X ].

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

Not applicable

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

GAM International Management Limited

This  report  is filed  by GAM  Holding  AG, a  holding  company  registered  in
Switzerland.  GAM  International  Management  Limited ("GIML") is a wholly-owned
subsidiary  of GAM  Holding  AG.  GIML is the  investment  adviser  of GAM North
American Growth (the "Fund") and therefore indirectly owns the 519,600 shares of
Common Stock in USA Truck,  Inc. of which the Fund holds.  No  subsidiary of GAM
Holding AG holds more than 5% of the outstanding voting securities.

Item 8.       Identification and Classification of Members of the Group

Not Applicable

Item 9.       Notice of Dissolution of Group

Not Applicable

                                    Page 4




Item 10. Certification

           The following certification shall be included if the statement is
           filed pursuant to ss.240.13d-1(c): 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.

                                    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.

                                                11/26/2007
                                     --------------------------------
                                                   Date

                                             /s/ Hans De Gier
                                     --------------------------------
                                                Signature

                                    Hans De Gier, Chairman of the Board
                                     --------------------------------
                                                Name/Title

                                               11/26/2007
                                     --------------------------------
                                                   Date

                                             /s/ David Solo
                                     --------------------------------
                                               Signature

                                         David Solo, Director
                                     --------------------------------
                                                Name/Title

                                               11/26/2007
                                     --------------------------------
                                                   Date

                                            /s/ Bernard Hodler
                                     --------------------------------
                                               Signature

                                        Bernard Hodler, Director
                                     ---------------------------------
                                              Name/Title












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