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


                                  SCHEDULE 13G


                    Under the Securities Exchange Act of 1934

                                 (Amendment No.      2       )*
                                               --------------

                             Arch Capital Group Ltd.
   -------------------------------------------------------------------------
                                (Name of Issuer)

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


                                    G0450A105
                          -----------------------------
                                 (CUSIP Number)

                                December 31, 2001
              -----------------------------------------------------
             (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).



                                       13G

CUSIP No.         G0450A105
                  ------------------------

-------------------------------------------------------------------------------
  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) [ ]
        Not Applicable
                                                              (b) [ ]
-------------------------------------------------------------------------------
  3     SEC USE ONLY
-------------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

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

      NUMBER OF                 None
        SHARES        ---------------------------------------------------------
     BENEFICIALLY     6    SHARED VOTING POWER
       OWNED BY
        EACH                    1,162,684
      REPORTING       ---------------------------------------------------------
       PERSON         7    SOLE DISPOSITIVE POWER
        WITH
                                None
                      ---------------------------------------------------------
                      8    SHARED DISPOSITIVE POWER

                                1,162,684
-------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

            1,162,684
-------------------------------------------------------------------------------
  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)

           9.0%
-------------------------------------------------------------------------------
  12   TYPE OF REPORTING PERSON
       (see Instructions)

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




                                       13G

CUSIP No.         G0450A105
                  ------------------------

-------------------------------------------------------------------------------
  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) [ ]
        Not Applicable
                                                              (b) [ ]
-------------------------------------------------------------------------------
  3     SEC USE ONLY
-------------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

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

      NUMBER OF                 None
        SHARES        ---------------------------------------------------------
     BENEFICIALLY     6    SHARED VOTING POWER
       OWNED BY
        EACH                    1,162,684
      REPORTING       ---------------------------------------------------------
       PERSON         7    SOLE DISPOSITIVE POWER
        WITH
                                None
                      ---------------------------------------------------------
                      8    SHARED DISPOSITIVE POWER

                                1,162,684
-------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

            1,162,684
-------------------------------------------------------------------------------
  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)

           9.0%
-------------------------------------------------------------------------------
  12   TYPE OF REPORTING PERSON
       (see Instructions)

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



                                       13G

CUSIP No.         G0450A105
                  ------------------------

-------------------------------------------------------------------------------
  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) [ ]
        Not Applicable
                                                              (b) [ ]
-------------------------------------------------------------------------------
  3     SEC USE ONLY
-------------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

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

      NUMBER OF                 None
        SHARES        ---------------------------------------------------------
     BENEFICIALLY     6    SHARED VOTING POWER
       OWNED BY
        EACH                    1,162,684
      REPORTING       ---------------------------------------------------------
       PERSON         7    SOLE DISPOSITIVE POWER
        WITH
                                None
                      ---------------------------------------------------------
                      8    SHARED DISPOSITIVE POWER

                                1,162,684
-------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

            1,162,684
-------------------------------------------------------------------------------
  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)

           9.0%
-------------------------------------------------------------------------------
  12   TYPE OF REPORTING PERSON
       (see Instructions)

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




                                       13G

CUSIP No.         G0450A105
                  ------------------------

-------------------------------------------------------------------------------
  1     NAME OF REPORTING PERSON /
        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) [ ]
        Not Applicable
                                                              (b) [ ]
-------------------------------------------------------------------------------
  3     SEC USE ONLY
-------------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

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

      NUMBER OF                 None
        SHARES        ---------------------------------------------------------
     BENEFICIALLY     6    SHARED VOTING POWER
       OWNED BY
        EACH                    1,162,684
      REPORTING       ---------------------------------------------------------
       PERSON         7    SOLE DISPOSITIVE POWER
        WITH
                                None
                      ---------------------------------------------------------
                      8    SHARED DISPOSITIVE POWER

                                1,162,684
-------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

            1,162,684
-------------------------------------------------------------------------------
  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)

           9.0%
-------------------------------------------------------------------------------
  12   TYPE OF REPORTING PERSON
       (see Instructions)

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



Item 1(a)        Name of Issuer:

                      Arch Capital Group Ltd.

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


                      20 Horseneck Lane
                      Greenwich, Connecticut 06830


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:


                      1000 North Water Street, #1770
                      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:

                      Common Stock


Item 2(e)        CUSIP Number:


                      G0450A105


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.



Item 4           Ownership (at December 31, 2001):

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

                            1,162,684

                      (b)   Percent of class:

                            9.0% (based on 12,868,158 shares
                            outstanding as of September 30, 2001)

                      (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:
                                   1,162,684
                           (iii)   sole power to dispose or to direct the
                                   disposition of: None
                            (iv)   shared power to dispose or to direct
                                   disposition of: 1,162,684


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:

                      The shares reported herein have been acquired on behalf of
                      discretionary clients of Artisan Partners. Persons other
                      than Artisan Partners are entitled to receive all
                      dividends from, and proceeds from the sale of, those
                      shares. None of those persons, to the knowledge of Artisan
                      Partners, Artisan Corp., Mr. Ziegler or Ms. Ziegler, has
                      an economic interest in more than 5% of the class.


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.




                                    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:  February 13, 2002


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




                                    By: /s/ Andrew A. Ziegler
                                        --------------------------
                                             Andrew A. Ziegler
                                             President


                                     ANDREW A. ZIEGLER

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


                                     CARLENE MURPHY ZIEGLER

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



                                  Exhibit Index
                                  -------------

Exhibit 1             Joint Filing Agreement dated as of February 13,
                      2002 by and among Artisan Partners Limited
                      Partnership, Artisan Investment Corporation,
                      Andrew A. Ziegler, and Carlene Murphy Ziegler