UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
Under the Securities Exchange Act of 1934
(Amendment No. )
PETROHAWK ENERGY CORP.
(Name of Issuer)
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Common Stock
(Title of Class of Securities)
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(CUSIP Number)
716495106
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December 31, 2007
Date of Event Which Requires Filing of this Statement)
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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).
Potential persons who are to respond to the collection of
information contained in this form are not required to
respond unless the form displays a currently valid OMB
control number.
Page 1 of 9 pages
1. Names of Reporting Persons and I.R.S. Identification No.
UBS AG (for the benefit and on behalf of the UBS Global
Asset Management business group of UBS AG (see Item 7)
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2. Check the Appropriate Box if a Member of a Group
a / /
b / / See Item 8 of attached schedule
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3. SEC USE ONLY
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4. Citizenship or Place of Organization
Switzerland
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Number of 5. Sole Voting Power 1,283,787
Shares Bene- 6. Shared Voting Power 0
ficially 7. Sole Dispositive Power 0
Owned by Each 8. Shared Dispositive Power 1,456,803
Reporting
Person With:
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9. Aggregate Amount Beneficially Owned by Each Reporting Person:
1,456,803 shares*
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10. Check if the Aggregate Amount in Row 9 Excludes Certain
Shares / /
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11. Percent of Class Represented by Amount in Row 9
7.3%
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12. Type of Reporting Person
BK, HC
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UBS AG disclaims beneficial ownership of such securities
pursuant to Rule 13d-4 under the Securities Exchange Act
of 1934. In accordance with SEC Release No. 34-39538
(January 12, 1998), this filing reflects the securities
beneficially owned by the UBS Global Asset Management
business group of UBS AG and its subsidiaries and
affiliates on behalf of its clients. This filing does
not reflect securities, if any, beneficially owned by
any other division or business group of UBS AG.
Page 2 of 9 pages
1. Names of Reporting Persons and I.R.S. Identification No.
UBS Americas Inc.
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2. Check the Appropriate Box if a Member of a Group
a / /
b / / See Item 8 of attached schedule
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3. SEC USE ONLY
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4. Citizenship or Place of Organization
Delaware
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Number of 5. Sole Voting Power 1,123,861
Shares Bene- 6. Shared Voting Power 0
ficially 7. Sole Dispositive Power 0
Owned by Each 8. Shared Dispositive Power 1,219,667
Reporting
Person With:
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9. Aggregate Amount Beneficially Owned by Each Reporting Person:
1,219,667 shares*
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10. Check if the Aggregate Amount in Row 9 Excludes Certain
Shares / /
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11. Percent of Class Represented by Amount in Row 9
6.1%
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12. Type of Reporting Person
HC
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UBS Americas Inc. disclaims beneficial ownership of such
securities pursuant to Rule 13d-4 under the Securities
Exchange Act of 1934. In accordance with SEC Release
No. 34-39538 (January 12, 1998), this filing reflects
the securities beneficially owned by the UBS Global
Asset Management business group of UBS AG and its
subsidiaries and affiliates on behalf of its clients.
This filing does not reflect securities, if any,
beneficially owned by any other division or business
group of UBS AG.
Page 3 of 9 pages
1
Names of Reporting Persons
I.R.S. Identification Nos. of above persons (entities only).
UBS Global Asset Management (Americas) Inc.
36-3664388
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2
Check the Appropriate Box if a Member of a Group (See
Instructions)
a / /
b / / See Item 8 of attached schedule.
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3
SEC USE ONLY
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4
Citizenship or Place of Organization - Delaware
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Number of 5. Sole Voting Power 1,123,861
Shares Bene- 6. Shared Voting Power 0
ficially 7. Sole Dispositive Power 0
Owned by Each 8. Shared Dispositive Power 1,219,667
Reporting
Person With:
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9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,219,667 Shares*
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10
Check if the Aggregate Amount in Row (9) Excludes Certain
Shares (See Instructions)
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11
Percent of Class Represented by Amount in Row (9)
6.1%
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12
Type of Reporting Person (See Instructions)
IA
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UBS Global Asset Management (Americas) Inc. disclaims
beneficial ownership of such securities pursuant to
Rule 13d-4 under the Securities Exchange Act
of 1934. In accordance with SEC Release No. 34-39538
(January 12, 1998), this filing reflects the securities
beneficially owned by the UBS Global Asset Management
business group of UBS AG and its subsidiaries and
affiliates on behalf of its clients. This filing
does not reflect securities, if any, beneficially
owned by any other division or business group of UBS AG.
Page 4 of 9 pages
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Cusip 716495106
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Item 1(a). Name of Issuer:
PETROHAWK ENERGY CORP
Item 1(b). Address of Issuer's Principal Executive Offices:
1000 Loisville Suite 5600
Houston, Texas 77002
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Item 2(a) Name of Persons Filing:
UBS AG, UBS Americas Inc., and UBS Global Asset Management
(Americas) Inc.(UBS Global AM)
Item 2(b) Address of Principal Business Office or, if none,
Residence:
UBS AG's principal business office is:
Bahnhofstrasse 45
PO Box CH-8021
Zurich, Switzerland
UBS Americas Inc.'s principal business office is:
677 Washington Blvd.
Stamford, CT 06901
UBS Global AM's principal business office is:
One North Wacker, Chicago, Illinois 60606
Item 2(c) Citizenship:
Incorporated by reference to Item 4 of the cover pages.
Item 2(d) Title of Class of Securities:
Common Stock (the "Common Stock")
Item 2(e) CUSIP Number:
716495106
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Item 3. Type of Person Filing:
UBS AG is classified as a Bank as defined in section 3(a)(6)
of the Act pursuant to no action relief granted by the staff
of the Securities and Exchange Commission. UBS Americas Inc.
is the parent holding company of UBS Global Asset Management
(Americas) Inc. UBS Global Asset Management (Americas) Inc. is
an Investment Adviser registered under section 203 of the
Investment Advisers Act of 1940.
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Item 4 (a)-(c)(iv). Ownership:
Incorporated by reference to Items 5-11 of the cover pages.
Page 5 of 9 pages
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Cusip 716495106
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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 / /.
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Item 6. Ownership of More than Five Percent on Behalf of
Another Person:
Accounts managed on a discretionary basis by the UBS Global
Asset Management business group of UBS AG (UBS Global AM)
have the right to receive or the power to direct the receipt
of dividends from, or the proceeds from the sale of, the
Common Stock. To the best of our knowledge, no account
holds more than 5 percent of the outstanding Common Stock.
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Item 7. Identification and Classification of the Subsidiary
Which Acquired the Security Being Reported on By the Parent
Holding Company:
Identification: UBS Global Asset Management (Americas) Inc.
Classification: IA
In addition to UBS AG, the following UBS Global AM
affiliates and subsidiaries are part of the UBS Global
Asset Management business group included in this filing:
UBS Global Asset Management (Americas) Inc., UBS Global
Asset Management Trust Company, UBS Global Asset
Management (Canada) Co., UBS Global Asset Management
(Australia) Ltd., UBS Global Asset Management
(Hong Kong) Limited, UBS (Trust & Banking) Limited, UBS
Global Asset Management (Japan) Ltd., UBS Global Asset
Management (Singapore) Ltd., UBS Global Asset
Management (Taiwan) Ltd., UBS Global Asset Management
(France) SA, UBS Global Asset Management (Deutschland) GmbH,
UBS Global Asset Management (Italia) SIM SpA,
UBS Espana S.A., UBS Global Asset management (UK) Ltd.
and UBS Global Asset Management Life Limited.
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Item 8 Identification and Classification of Members of the
Group:
UBS Global AM is composed of wholly-owned subsidiaries
and branches of UBS AG. UBS AG is reporting direct and
indirect beneficial ownership of holdings. UBS Americas
Inc. is reporting indirect beneficial ownership of
holdings by reason of its ownership of UBS Global
Asset Management (Americas) Inc. None of the reporting
persons affirm the existence of a group within
the meaning of Rule 13d-5(b)(1).
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Item 9 Notice of Dissolution of Group:
Not Applicable
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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.
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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 14, 2008
UBS AG
By: /s/ Thomas Madsen
Thomas Madsen, Member GMB
By: /s/ Kai R. Sotorp
Kai R. Sotorp, Member GMB
Page 7 of 9 pages
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Cusip 716495106
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UBS Americas Inc.
By: /s/ Thomas Madsen
Thomas Madsen, Member GMB
By: /s/ Kai R. Sotorp
Kai R. Sotorp, Member GMB
UBS Global Asset Management
(Americas) Inc.
By: /s/Mark F. Kemper
Mark F. Kemper
Executive Director
By: /s/Michael J. Calhoun
Michael J. Calhoun
Assistant Secretary
Page 8 of 9 pages
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Cusip 716495106
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AGREEMENT TO MAKE A JOINT FILING
UBS AG, UBS Americas Inc., and UBS Global Asset Management
(Americas) Inc. each agrees that this Schedule 13G
(including all amendments hereto) is filed by and on
behalf of each such party.
Date: February 16, 2008
UBS AG
By: /s/ Thomas Madsen
Thomas Madsen, Member GMB
By: /s/ Kai R. Sotorp
Kai R. Sotorp, Member GMB
UBS Americas Inc.
By: /s/ Thomas Madsen
Thomas Madsen, Member GMB
By: /s/ Kai R. Sotorp
Kai R. Sotorp, Member GMB
UBS Global Asset Management
(Americas) Inc.
By: /s/Mark F. Kemper
Mark F. Kemper
Executive Director
By: /s/Michael J. Calhoun
Michael J. Calhoun
Assistant Secretary
Page 9 of 9 pages