UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
Under the Securities Exchange Act of 1934
(Amendment No. 2)*
Prima Energy Corporation
(Name of Issuer)
Common Stock
(Title of Class of Securities)
741901201
(CUSIP Number)
December 31, 2004
(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 pages
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CUSIP No. 741901201 13G Page 2 of 12 Pages
------------------- ------------------
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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
NUMBER OF
None
SHARES
-----------------------------------------------------------------
BENEFICIALLY 6 SHARED VOTING POWER
OWNED BY None
EACH -----------------------------------------------------------------
7 SOLE DISPOSITIVE POWER
REPORTING
None
PERSON
-----------------------------------------------------------------
WITH 8 SHARED DISPOSITIVE POWER
None
--------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
None
--------------------------------------------------------------------------------
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)
0.0%
--------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON
(see Instructions)
IA
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Page 2 of 12
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CUSIP No. 741901201 13G Page 3 of 12 Pages
------------------- ------------------
--------------------------------------------------------------------------------
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
NUMBER OF
None
SHARES
-----------------------------------------------------------------
BENEFICIALLY 6 SHARED VOTING POWER
OWNED BY None
EACH -----------------------------------------------------------------
7 SOLE DISPOSITIVE POWER
REPORTING
None
PERSON
-----------------------------------------------------------------
WITH 8 SHARED DISPOSITIVE POWER
None
--------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
None
--------------------------------------------------------------------------------
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)
0.0%
--------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON
(see Instructions)
CO
--------------------------------------------------------------------------------
Page 3 of 12
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CUSIP No. 741901201 13G Page 4 of 12 Pages
------------------- ------------------
--------------------------------------------------------------------------------
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
NUMBER OF
None
SHARES
-----------------------------------------------------------------
BENEFICIALLY 6 SHARED VOTING POWER
OWNED BY None
EACH -----------------------------------------------------------------
7 SOLE DISPOSITIVE POWER
REPORTING
None
PERSON
-----------------------------------------------------------------
WITH 8 SHARED DISPOSITIVE POWER
None
--------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
None
--------------------------------------------------------------------------------
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)
0.0%
--------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON
(see Instructions)
IN
--------------------------------------------------------------------------------
Page 4 of 12
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CUSIP No. 741901201 13G Page 5 of 12 Pages
------------------- ------------------
--------------------------------------------------------------------------------
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
NUMBER OF
None
SHARES
-----------------------------------------------------------------
BENEFICIALLY 6 SHARED VOTING POWER
OWNED BY None
EACH -----------------------------------------------------------------
7 SOLE DISPOSITIVE POWER
REPORTING
None
PERSON
-----------------------------------------------------------------
WITH 8 SHARED DISPOSITIVE POWER
None
--------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
None
--------------------------------------------------------------------------------
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)
0.0%
--------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON
(see Instructions)
IN
--------------------------------------------------------------------------------
Page 5 of 12
Item 1(a) Name of Issuer:
Prima Energy Corporation
Item 1(b) Address of Issuer's Principal Executive Offices:
1099 18th Street, Suite 400
Denver, CO 80202
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:
Common Stock
Item 2(e) CUSIP Number:
741901201
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, 2004):
(a) Amount owned "beneficially" within the meaning of rule
13d-3:
None
(b) Percent of class:
0.0% (based on 12,980,192 shares outstanding as of
April 30, 2004)
(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: None
(iii) sole power to dispose or to direct the disposition
of: None
(iv) shared power to dispose or to direct 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 [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, 2005
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, 2005 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