SCHEDULE 13G
                                (Rule 13d-102)


            Information to be Included in Statements Filed Pursuant
          to Rule 13d-1(b), (c) and (d) and Amendments Thereto Filed
                            Pursuant to Rule 13d-2.

                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549

                   Under the Securities Exchange Act of 1934

                              (Amendment No. 2)*





                            Rush Enterprises, Inc.
- --------------------------------------------------------------------------------
                               (Name of Issuer)


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


                                   781846209
                         -----------------------------
                                (CUSIP Number)


                               December 31, 2006
- --------------------------------------------------------------------------------
            (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).

                                 Page 1 of 12



 CUSIP No. 781846209                 13G

- -------------------------------------------------------------------------------
 1  NAME OF REPORTING PERSON /
    I.R.S. IDENTIFICATION NO. OF ABOVE PERSON


    Artisan Partners Limited Partnership
- -------------------------------------------------------------------------------
 2  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
    (see Instructions)                                                  (a) [ ]
                                                                        (b) [ ]

    Not Applicable
- -------------------------------------------------------------------------------
 3  SEC USE ONLY



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


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


                   None
  NUMBER OF   -----------------------------------------------------------------
    SHARES     6  SHARED VOTING POWER
 BENEFICIALLY
   OWNED BY
     EACH          10,300
  REPORTING   -----------------------------------------------------------------
    PERSON     7  SOLE DISPOSITIVE POWER
     WITH

                   None
              -----------------------------------------------------------------
               8  SHARED DISPOSITIVE POWER


                   10,300
- -------------------------------------------------------------------------------
 9  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON


    10,300
- -------------------------------------------------------------------------------
10  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
    (see Instructions)

    Not Applicable
- -------------------------------------------------------------------------------
11  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)


    0.1%
- -------------------------------------------------------------------------------
12  TYPE OF REPORTING PERSON
    (see Instructions)


    IA
- -------------------------------------------------------------------------------

                                 Page 2 of 12



 CUSIP No. 781846209                 13G

- -------------------------------------------------------------------------------
 1  NAME OF REPORTING PERSON
    S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON


    Artisan Investment Corporation
- -------------------------------------------------------------------------------
 2  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
    (see Instructions)                                                  (a) [ ]
                                                                        (b) [ ]

    Not Applicable
- -------------------------------------------------------------------------------
 3  SEC USE ONLY



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


    Wisconsin
- -------------------------------------------------------------------------------
               5  SOLE VOTING POWER


                   None
  NUMBER OF   -----------------------------------------------------------------
    SHARES     6  SHARED VOTING POWER
 BENEFICIALLY
   OWNED BY
     EACH          10,300
  REPORTING   -----------------------------------------------------------------
    PERSON     7  SOLE DISPOSITIVE POWER
     WITH

                   None
              -----------------------------------------------------------------
               8  SHARED DISPOSITIVE POWER


                   10,300
- -------------------------------------------------------------------------------
 9  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON


    10,300
- -------------------------------------------------------------------------------
10  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
    (see Instructions)

    Not Applicable
- -------------------------------------------------------------------------------
11  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)


    0.1%
- -------------------------------------------------------------------------------
12  TYPE OF REPORTING PERSON
    (see Instructions)


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

                                 Page 3 of 12



 CUSIP No. 781846209                 13G

- -------------------------------------------------------------------------------
 1  NAME OF REPORTING PERSON
    S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON


    Andrew A. Ziegler
- -------------------------------------------------------------------------------
 2  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
    (see Instructions)                                                  (a) [ ]
                                                                        (b) [ ]

    Not Applicable
- -------------------------------------------------------------------------------
 3  SEC USE ONLY



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


    U.S.A.
- -------------------------------------------------------------------------------
               5  SOLE VOTING POWER


                   None
  NUMBER OF   -----------------------------------------------------------------
    SHARES     6  SHARED VOTING POWER
 BENEFICIALLY
   OWNED BY
     EACH          10,300
  REPORTING   -----------------------------------------------------------------
    PERSON     7  SOLE DISPOSITIVE POWER
     WITH

                   None
              -----------------------------------------------------------------
               8  SHARED DISPOSITIVE POWER


                   10,300
- -------------------------------------------------------------------------------
 9  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON


    10,300
- -------------------------------------------------------------------------------
10  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
    (see Instructions)

    Not Applicable
- -------------------------------------------------------------------------------
11  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)


    0.1%
- -------------------------------------------------------------------------------
12  TYPE OF REPORTING PERSON
    (see Instructions)


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

                                 Page 4 of 12



 CUSIP No. 781846209                 13G

- -------------------------------------------------------------------------------
 1  NAME OF REPORTING PERSON
    S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON


    Carlene Murphy Ziegler
- -------------------------------------------------------------------------------
 2  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
    (see Instructions)                                                  (a) [ ]
                                                                        (b) [ ]

    Not Applicable
- -------------------------------------------------------------------------------
 3  SEC USE ONLY



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


    U.S.A.
- -------------------------------------------------------------------------------
               5  SOLE VOTING POWER


                   None
  NUMBER OF   -----------------------------------------------------------------
    SHARES     6  SHARED VOTING POWER
 BENEFICIALLY
   OWNED BY
     EACH          10,300
  REPORTING   -----------------------------------------------------------------
    PERSON     7  SOLE DISPOSITIVE POWER
     WITH

                   None
              -----------------------------------------------------------------
               8  SHARED DISPOSITIVE POWER


                   10,300
- -------------------------------------------------------------------------------
 9  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON


    10,300
- -------------------------------------------------------------------------------
10  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
    (see Instructions)

    Not Applicable
- -------------------------------------------------------------------------------
11  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)


    0.1%
- -------------------------------------------------------------------------------
12  TYPE OF REPORTING PERSON
    (see Instructions)


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

                                 Page 5 of 12



Item 1(a)   Name of Issuer:

                 Rush Enterprises, Inc.

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

                 555 I.H. 35 South, Suite 500
                 New Braunfels, Texas 78130

Item 2(a)   Name of Person Filing:

                 Artisan Partners Limited Partnership ("Artisan Partners")
                 Artisan Investment Corporation, the general partner of
                   Artisan Partners ("Artisan Corp.")
                 Andrew A. Ziegler
                 Carlene Murphy Ziegler

Item 2(b)   Address of Principal Business Office:

                 Artisan Partners, Artisan Corp., Mr. Ziegler and Ms. Ziegler
                 are all located at:

                 875 East Wisconsin Avenue, Suite 800
                 Milwaukee, WI 53202

Item 2(c)   Citizenship:

                 Artisan Partners is a Delaware limited partnership
                 Artisan Corp. is a Wisconsin corporation
                 Mr. Ziegler and Ms. Ziegler are U.S. citizens

Item 2(d)   Title of Class of Securities:

                 Class A Common Stock

Item 2(e)   CUSIP Number:

                 781846209

Item 3      Type of Person:

                 (e) Artisan Partners is an investment adviser registered under
                 section 203 of the Investment Advisers Act of 1940; Artisan
                 Corp. is the General Partner of Artisan Partners; Mr. Ziegler
                 and Ms. Ziegler are the principal stockholders of Artisan Corp.

                                 Page 6 of 12



Item 4      Ownership (at December 31, 2006):

                  (a)  Amount owned "beneficially" within the meaning of rule
                       13d-3:

                       10,300

                  (b)  Percent of class:

                       0.1% (based on 17,041,269 shares outstanding as of
                       November 1, 2006)

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

                       (i)    sole power to vote or to direct the vote: None

                       (ii)   shared power to vote or to direct the vote:
                              10,300

                       (iii)  sole power to dispose or to direct the
                              disposition of: None

                       (iv)   shared power to dispose or to direct disposition
                              of: 10,300

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:

                 Not Applicable

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.

                                 Page 7 of 12



                                   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.

Date: January 26, 2007

                                     ARTISAN INVESTMENT CORPORATION
                                     for itself and as general partner of
                                     ARTISAN PARTNERS LIMITED PARTNERSHIP

                                     By:  Lawrence A. Totsky*
                                          -----------------------------------

                                     ANDREW A. ZIEGLER

                                     Andrew A. Ziegler*
                                     --------------------------------------

                                     CARLENE MURPHY ZIEGLER

                                     Carlene Murphy Ziegler*
                                     --------------------------------------

                                     *By: /s/ Lawrence A. Totsky
                                          -----------------------------------
                                          Lawrence A. Totsky
                                          Chief Financial Officer of Artisan
                                            Investment Corporation
                                          Attorney-in-Fact for Andrew A. Ziegler
                                          Attorney-in-Fact for Carlene Murphy
                                            Ziegler

                                 Page 8 of 12



                                 Exhibit Index

 Exhibit 1    Joint Filing Agreement dated as of January 26, 2007 by and
              among Artisan Partners Limited Partnership, Artisan Investment
              Corporation, Andrew A. Ziegler, and Carlene Murphy Ziegler

 Exhibit 2    Power of Attorney of Andrew A. Ziegler dated as of April 2,
              2002

 Exhibit 3    Power of Attorney of Carlene M. Ziegler dated as of April 2,
              2002

                                 Page 9 of 12



                                                                      EXHIBIT 1

                            JOINT FILING AGREEMENT

   The undersigned hereby agree to the joint filing of the Schedule 13G to
which this Agreement is attached.

          Dated: January 26, 2007

                                     ARTISAN INVESTMENT CORPORATION
                                     for itself and as general partner of
                                     ARTISAN PARTNERS LIMITED PARTNERSHIP

                                     By:  Lawrence A. Totsky*
                                          -----------------------------------

                                     ANDREW A. ZIEGLER

                                     Andrew A. Ziegler*
                                     --------------------------------------

                                     CARLENE MURPHY ZIEGLER

                                     Carlene Murphy Ziegler*
                                     --------------------------------------

                                     *By: /s/ Lawrence A. Totsky
                                          -----------------------------------
                                          Lawrence A. Totsky
                                          Chief Financial Officer of Artisan
                                            Investment Corporation
                                          Attorney-in-Fact for Andrew A. Ziegler
                                          Attorney-in-Fact for Carlene Murphy
                                            Ziegler

                                 Page 10 of 12



                                                                      EXHIBIT 2

                               POWER OF ATTORNEY

   The undersigned, Andrew A. Ziegler, hereby appoints Lawrence A. Totsky,
Janet D. Olsen, and Gregory K. Ramirez, and each of them individually, his true
and lawful attorney-in-fact and agent, with full power to execute and file with
the United States Securities and Exchange Commission and any stock exchange or
similar authority, for and on his behalf in any and all capacities, any and all
reports required to be filed pursuant to Section 13 of the Securities Exchange
Act of 1934 and the rules thereunder, including but not limited to reports on
Schedule 13D or 13G, any and all amendments to such reports, with all exhibits,
and any other forms or documents as may be necessary in connection with the
filing of such reports with the United States Securities and Exchange
Commission and any stock exchange or similar authority, granting unto said
attorney full power and authority to do and perform any and all acts for and on
behalf of the undersigned which may be necessary or desirable to complete, as
fully as the undersigned might or could do in person.

   This Power of Attorney shall remain in full force and effect until revoked
by the undersigned in a signed writing delivered to the foregoing
attorneys-in-fact and agents.

   IN WITNESS WHEREOF the undersigned has caused this Power of Attorney to be
executed this 2nd day of April, 2002.

                                                  /s/ Andrew A. Ziegler
                                                  -----------------------------
                                                  Andrew A. Ziegler

STATE OF WISCONSIN    )
                      ) SS.
COUNTY OF MILWAUKEE   )

   I, Marie V. Glowacki, a Notary Public in and for the County of Milwaukee,
State of Wisconsin, DO HEREBY CERTIFY that Andrew A. Ziegler, who is personally
known to me to be the same person whose name is subscribed to the foregoing
instrument, appeared before me this day in person and acknowledged that he
signed and delivered the said instrument as his own free and voluntary act, for
the uses and purposes therein set forth.

   Given under my hand and notarial seal, this 2 day of April, 2002.

                                                  /s/ Marie V. Glowacki
                                                  -----------------------------
                                                  Notary Public

                                 Page 11 of 12



                                                                      EXHIBIT 3

                               POWER OF ATTORNEY

   The undersigned, Carlene Murphy Ziegler, hereby appoints Lawrence A. Totsky,
Janet D. Olsen, and Gregory K. Ramirez, and each of them individually, her true
and lawful attorney-in-fact and agent, with full power to execute and file with
the United States Securities and Exchange Commission and any stock exchange or
similar authority, for and on her behalf in any and all capacities, any and all
reports required to be filed pursuant to Section 13 of the Securities Exchange
Act of 1934 and the rules thereunder, including but not limited to reports on
Schedule 13D or 13G, any and all amendments to such reports, with all exhibits,
and any other forms or documents as may be necessary in connection with the
filing of such reports with the United States Securities and Exchange
Commission and any stock exchange or similar authority, granting unto said
attorney full power and authority to do and perform any and all acts for and on
behalf of the undersigned which may be necessary or desirable to complete, as
fully as the undersigned might or could do in person.

   This Power of Attorney shall remain in full force and effect until revoked
by the undersigned in a signed writing delivered to the foregoing
attorneys-in-fact and agents.

   IN WITNESS WHEREOF the undersigned has caused this Power of Attorney to be
executed this 2 day of April, 2002.

                                                  /s/ Carlene Murphy Ziegler
                                                  -----------------------------
                                                  Carlene Murphy Ziegler

STATE OF WISCONSIN    )
                      ) SS.
COUNTY OF MILWAUKEE   )

   I, Kim R. Ruffert, a Notary Public in and for the County of Milwaukee, State
of Wisconsin, DO HEREBY CERTIFY that Carlene Murphy Ziegler, who is personally
known to me to be the same person whose name is subscribed to the foregoing
instrument, appeared before me this day in person and acknowledged that she
signed and delivered the said instrument as her own free and voluntary act, for
the uses and purposes therein set forth.

   Given under my hand and notarial seal, this 2 day of April, 2002.

                                                  /s/ Kim R. Ruffert
                                                  -----------------------------
                                                  Notary Public

                                 Page 12 of 12