UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: 6)* USA Truck, Inc. -------------------------------------------------------------------------------- (Name of Issuer) Common Stock -------------------------------------------------------------------------------- (Title of Class of Securities) 902925106 -------------------------------------------------------------------------------- (CUSIP Number) August 24, 2011 -------------------------------------------------------------------------------- (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). CUSIP No. 902925106 1. Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only). GAM Holding Ltd ------------------- -------------------------------------------------------------------------------- 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 600,000 shares of common stock Beneficially 6. Shared Voting Power Owned by Each Reporting ---------- Person With* 7. Sole Dispositive Power 600,000 shares of common stock 8. Shared Dispositive Power --------- 9. Aggregate Amount Beneficially Owned by Each Reporting Person 600,000 shares of common stock ------------ 10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) 11. Percent of Class Represented by Amount in Row (9) 5.74% (based on the total of 10,456,381 outstanding shares of common stock) --------- 12. Type of Reporting Person (See Instructions) HC ---- *GAM Holding Ltd. 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, AR 72956 Item 2. (a) Name of Person Filing GAM Holding Ltd -------------- 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); [X] (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). 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: 600,000 shares of common stock --------- (b) Percent of class: 5.74% The percentage used herein was calculated based on the total of 10,456,381 outstanding shares of common stock ----- (c) Number of shares as to which the person has: (i) Sole power to vote or to direct the vote 600,000 shares of common stock ------------- (ii) Shared power to vote or to direct the vote ------------- (iii) Sole power to dispose or to direct the 600,000 shares of common stock ------------- (iv) Shared power to dispose or to direct the disposition of ------------- 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 [ ]. 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. The securities reported herein (the "Securities") are beneficially owned by one or more investment funds or other accounts that, pursuant to investment management contracts, are managed by GAM International Management Ltd. ("GIML"). GIML is a wholly owned subsidiary of GAM Holding Ltd. Such investment management contracts grant to GIML all investment and voting power over the securities owned by such investment management clients. Therefore, GIML may be deemed to be, for purposes of Rule 13d-3 under the Act, the beneficial owner of the Securities. Item 8. Identification and Classification of Members of the Group Not Applicable Item 9. Notice of Dissolution of Group Not Applicable 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. August 25, 2011 -------------------------------- Date /s/ Scott Sullivan -------------------------------- Signature Scott Sullivan, Group General Counsel -------------------------------- Name/Title JOINT FILING AGREEMENT In accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree to joint filing of the attached Schedule 13G, and any and all amendments thereto, and expressly authorize GAM Holding Ltd, as the ultimate parent company of each of its undersigned subsidiaries, to file such Schedule 13G, and any and all amendments thereto, on behalf of each of them. Date: August 25, 2011 GAM Holding Ltd By: /s/ Scott Sullivan Name: Scott Sullivan Title: Group General Counsel GAM International Management Limited By: /s/ Scott Sullivan Name: Scott Sullivan Title: Group General Counsel