UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
Under the Securities Exchange Act of 1934
(Amendment No. 1)<F1>
American Pacific Corporation
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(Name of Issuer)
Common Stock
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(Title of Class of Securities)
028740108
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(CUSIP Number)
February 29, 2000
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(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)
<F1> 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>
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CUSIP No. 028740108 13G
- --------------------
- -------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Artisan Partners Limited Partnership 39-1807188
- -------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP<F1>
(a)[ ]
Not Applicable (b)[ ]
- -------------------------------------------------------------------------------
3 SEC USE ONLY
- -------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
- -------------------------------------------------------------------------------
5 SOLE VOTING POWER
None
NUMBER OF ------------------------------------------------------------------
SHARES 6 SHARED VOTING POWER
BENEFICIALLY 1,136,000
OWNED BY ------------------------------------------------------------------
EACH 7 SOLE DISPOSITIVE POWER
REPORTING None
PERSON ------------------------------------------------------------------
WITH 8 SHARED DISPOSITIVE POWER
1,136,000
- -------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
1,136,000
- -------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
SHARES<F1>
Not Applicable
- -------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
16.05%
- -------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON<F1>
IA
- -------------------------------------------------------------------------------
<F1> SEE INSTRUCTION BEFORE FILLING OUT!
<PAGE>
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CUSIP No. 028740108 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<F1>
(a)[ ]
Not Applicable (b)[ ]
- -------------------------------------------------------------------------------
3 SEC USE ONLY
- -------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
Wisconsin
- -------------------------------------------------------------------------------
5 SOLE VOTING POWER
None
NUMBER OF ------------------------------------------------------------------
SHARES 6 SHARED VOTING POWER
BENEFICIALLY 1,136,000
OWNED BY ------------------------------------------------------------------
EACH 7 SOLE DISPOSITIVE POWER
REPORTING None
PERSON ------------------------------------------------------------------
WITH 8 SHARED DISPOSITIVE POWER
1,136,000
- -------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
1,136,000
- -------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
SHARES<F1>
Not Applicable
- -------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
16.05%
- -------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON<F1>
CO
- -------------------------------------------------------------------------------
<F1> SEE INSTRUCTION BEFORE FILLING OUT!
<PAGE>
- --------------------
CUSIP No. 028740108 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<F1>
(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 6 SHARED VOTING POWER
BENEFICIALLY 1,136,000
OWNED BY ------------------------------------------------------------------
EACH 7 SOLE DISPOSITIVE POWER
REPORTING None
PERSON ------------------------------------------------------------------
WITH 8 SHARED DISPOSITIVE POWER
1,136,000
- -------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
1,136,000
- -------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
SHARES<F1>
Not Applicable
- -------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
16.05%
- -------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON<F1>
IN
- -------------------------------------------------------------------------------
<F1> SEE INSTRUCTION BEFORE FILLING OUT!
<PAGE>
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CUSIP No. 028740108 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<F1>
(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 6 SHARED VOTING POWER
BENEFICIALLY 1,136,000
OWNED BY ------------------------------------------------------------------
EACH 7 SOLE DISPOSITIVE POWER
REPORTING None
PERSON ------------------------------------------------------------------
WITH 8 SHARED DISPOSITIVE POWER
1,136,000
- -------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
1,136,000
- -------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
SHARES<F1>
Not Applicable
- -------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
16.05%
- -------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON<F1>
IN
- -------------------------------------------------------------------------------
<F1>SEE INSTRUCTION BEFORE FILLING OUT!
<PAGE>
Item 1(a) Name of Issuer:
American Pacific Corporation
Item 1(b) Address of Issuer's Principal Executive Offices:
3770 Howard Hughes Parkway, Suite 300
Las Vegas, NV 89109-0940
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:
028740108
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
officers and principal stockholders of Artisan Corp.
<PAGE>
Item 4 Ownership (at February 29, 2000):
(a) Amount owned "beneficially" within the meaning of rule
13d-3:
1,136,000
(b) Percent of class:
16.05% (based on 7,078,637 shares outstanding on
January 31, 2000)
(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:
1,136,000
(iii) sole power to dispose or to direct the
disposition of: None
(iv) shared power to dispose or to direct disposition
of: 1,136,000
Artisan Partners serves as investment adviser to Artisan Funds,
Inc., comprised of four series designated Artisan Small Cap Fund,
Artisan International Fund, Artisan Mid Cap Fund and Artisan
Small Cap Value Fund (the "Funds"). Various of Artisan Partners'
limited partners and employees are also officers and directors
of the Funds, but Artisan Partners does not consider the Funds
to be controlled by such persons. Although the Funds are not
controlled by Artisan Partners, pursuant to rule 13d-3(a) the
shares beneficially owned by a Fund, with respect to which that
Fund has delegated to Artisan Partners shared voting power and
shared dispositive power, are considered to be shares
beneficially owned by Artisan Partners by reason of such
delegated powers. Other clients of Artisan Partners may own
shares which are not included in the aggregate number of shares
reported herein because Artisan Partners does not have or share
voting or investment power over those shares.
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 these persons, to the knowledge
of Artisan Partners, 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:
Not Applicable
Item 8 Identification and Classification of Members of the Group:
Not Applicable
Item 9 Notice of Dissolution of Group:
Not Applicable
<PAGE>
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 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>
Signature
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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: March 9, 2000
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
--------------------------
<PAGE>
Exhibit Index
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Exhibit 1 Joint Filing Agreement dated as of March 9, 2000 by and
among Artisan Partners Limited Partnership, Artisan
Investment Corporation, Andrew A. Ziegler, and Carlene
Murphy Ziegler
EXHIBIT 1
JOINT FILING AGREEMENT
The undersigned hereby agree to the joint filing of the Schedule 13G to
which this Agreement is attached.
Dated: March 9, 2000
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
--------------------------------------
