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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 )*
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Minerals Technologies Inc.
- --------------------------------------------------------------------------------
(Name of Issuer)
Common Stock
- --------------------------------------------------------------------------------
(Title of Class of Securities)
603158106
-------------------------------
(CUSIP Number)
December 31, 2002
------------------------------
(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. 603158106
----------------
- --------------------------------------------------------------------------------
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
None
NUMBER OF
SHARES -----------------------------------------------------------------
BENEFICIALLY 6 SHARED VOTING POWER
OWNED BY
EACH 323,236
REPORTING
PERSON -----------------------------------------------------------------
WITH 7 SOLE DISPOSITIVE POWER
None
-------------------------------------------------------------
8 SHARED DISPOSITIVE POWER
323,236
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
323,236
- --------------------------------------------------------------------------------
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)
1.6%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON
(see Instructions)
IA
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13G
CUSIP No. 603158106
----------------
- --------------------------------------------------------------------------------
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
None
NUMBER OF
SHARES -----------------------------------------------------------------
BENEFICIALLY 6 SHARED VOTING POWER
OWNED BY
EACH 323,236
REPORTING
PERSON -----------------------------------------------------------------
WITH 7 SOLE DISPOSITIVE POWER
None
-------------------------------------------------------------
8 SHARED DISPOSITIVE POWER
323,236
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
323,236
- --------------------------------------------------------------------------------
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)
1.6%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON
(see Instructions)
CO
- --------------------------------------------------------------------------------
13G
CUSIP No. 603158106
----------------
- --------------------------------------------------------------------------------
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
None
NUMBER OF
SHARES -----------------------------------------------------------------
BENEFICIALLY 6 SHARED VOTING POWER
OWNED BY
EACH 323,236
REPORTING
PERSON -----------------------------------------------------------------
WITH 7 SOLE DISPOSITIVE POWER
None
-------------------------------------------------------------
8 SHARED DISPOSITIVE POWER
323,236
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
323,236
- --------------------------------------------------------------------------------
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)
1.6%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON
(see Instructions)
IN
- --------------------------------------------------------------------------------
13G
CUSIP No. 603158106
----------------
- --------------------------------------------------------------------------------
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) [ ]
Not Applicable
(b) [ ]
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
U.S.A.
- --------------------------------------------------------------------------------
5 SOLE VOTING POWER
None
NUMBER OF
SHARES -----------------------------------------------------------------
BENEFICIALLY 6 SHARED VOTING POWER
OWNED BY
EACH 323,236
REPORTING
PERSON -----------------------------------------------------------------
WITH 7 SOLE DISPOSITIVE POWER
None
-------------------------------------------------------------
8 SHARED DISPOSITIVE POWER
323,236
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
323,236
- --------------------------------------------------------------------------------
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)
1.6%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON
(see Instructions)
IN
- --------------------------------------------------------------------------------
Item 1(a) Name of Issuer:
Minerals Technologies Inc.
Item 1(b) Address of Issuer's Principal Executive Offices:
405 Lexington Avenue
New York, NY 10174
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:
6031581068
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, 2002):
(a) Amount owned "beneficially" within the meaning of
rule 13d-3:
323,236
(b) Percent of class:
1.6% (based on 20,148,155 shares outstanding as
of October 21, 2002)
(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:
323,236
(iii) sole power to dispose or to direct the
disposition of: None
(iv) shared power to dispose or to direct disposition
of: 323,236
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.
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 31, 2003
ARTISAN INVESTMENT CORPORATION
for itself and as general partner of
ARTISAN PARTNERS LIMITED
PARTNERSHIP
By: /s/ Lawrence A. Totsky
--------------------------
Lawrence A. Totsky
Chief Financial Officer
ANDREW A. ZIEGLER
Andrew A. Ziegler*
--------------------------------
*By: /s/ Lawrence A. Totsky
---------------------------
Lawrence A. Totsky
Attorney-in-Fact
CARLENE MURPHY ZIEGLER
Carlene Murphy Ziegler*
--------------------------------
*By: /s/ Lawrence A. Totsky
---------------------------
Lawrence A. Totsky
Attorney-in-Fact
Exhibit Index
-------------
Exhibit 1 Joint Filing Agreement dated as of January 31, 2003 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
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 31, 2003
ARTISAN INVESTMENT CORPORATION
for itself and as general partner of
ARTISAN PARTNERS LIMITED
PARTNERSHIP
By: /s/ Lawrence A. Totsky
---------------------------
Lawrence A. Totsky
Chief Financial Officer
ANDREW A. ZIEGLER
Andrew A. Ziegler*
--------------------------------
*By: /s/ Lawrence A. Totsky
---------------------------
Lawrence A. Totsky
Attorney-in-Fact
CARLENE MURPHY ZIEGLER
Carlene Murphy Ziegler*
--------------------------------
*By: /s/ Lawrence A. Totsky
---------------------------
Lawrence A. Totsky
Attorney-in-Fact
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
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 he 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