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Filing Details

Accession Number:: 0001209191-11-045721
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2011-08-26 16:16:59
Reporting Period:: 2011-08-25

Filing Date:: 2011-08-26
Accepted Time:: 2011-08-26 16:16:59
SEC Url:: Form 4 Filing

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1059324	Petrohawk Energy Corp	HK	Crude Petroleum & Natural Gas (1311)	860876964

Insiders

Cik	Name	Reported Address	Director	Officer	Large Shareholder	Other
811809	Ltd Billiton Bhp	180 Lonsdale Street Melbourne Victoria 3000 C3	No	No	Yes	No
1528440	Ltd. Pty. International Petroleum Billiton Bhp	Bhp Billiton Centre180 Lonsdale Street Melbourne Victoria 3000 C3	No	No	Yes	No
1528444	Bhp Billiton Petroleum Holdings Llc	1360 Post Oak Boulevard Suite 150 Houston TX 77056	No	No	Yes	No
1528446	Bhp Billiton Petroleum (North America) Inc.	1360 Post Oak Boulevard Suite 150 Houston TX 77056	No	No	Yes	No
1528447	Bhp Billiton Petroleum Holdings (Usa) Inc.	1360 Post Oak Boulevard Suite 150 Houston TX 77056	No	No	Yes	No
1528448	North America Holdings Ii Inc.	1360 Post Oak Boulevard Suite 150 Houston TX 77056	No	No	Yes	No

Reported Non-Derivative Transactions

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Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock, Par Value 0.001 Per Share	Acquisiton	2011-08-25	43,738,426	$38.75	100	No	4	P	Indirect	See Footnote

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	P	Indirect	See Footnote

Footnotes

This form is a joint filing by BHP Billiton Limited, BHP Billiton Petroleum International Pty. Ltd., a wholly owned subsidiary of BHP Billiton Limited ("PTY"), BHP Billiton Petroleum Holdings LLC, a wholly owned subsidiary of PTY ("LLC"), BHP Billiton Petroleum Holdings (USA) Inc., a subsidiary jointly owned by PTY and LLC ("USA"), BHP Billiton Petroleum (North America) Inc., a wholly owned subsidiary of USA ("Parent") and North America Holdings II Inc., a wholly owned subsidiary of Parent ("Merger Sub").
Shares were held by Merger Sub. As Merger Sub is an indirect wholly owned subsidiary of each of BHP Billiton Limited, PTY, LLC and USA and a direct wholly owned subsidiary of Parent, each of BHP Billiton Limited, PTY, LLC, USA and Parent may be deemed to have acquired indirect beneficial ownership of the Shares.
Reflects all of the outstanding shares of Petrohawk Energy Corporation ("Petrohawk") not acquired through the tender offer effected pursuant to the Agreement and Plan of Merger, dated as of July 14, 2011, entered into by and among BHP Billiton, Parent, Merger Sub and Petrohawk (the "Merger Agreement"), which may be deemed to have been acquired by BHP Billiton, PTY, LLC, USA and Parent pursuant to the consumation of the Merger (as defined below).
On August 25, 2011, Merger Sub was merged with and into Petrohawk, with Petrohawk being the surviving corporation as a direct wholly owned subsidiary of Parent sursuant to a "short-form merger" under Delaware law (the "Merger"). At the effective time of the Merger, all of Petrohawk's previously outstanding stock held by the Reporting Persons were canceled. Prior to the Merger, Parent directly held, and therefore BHP Billiton Limited, PTY, LLC and USA may be deemed to have indirectly held, 100 shares of Purchaser, which represented all of the issued and outstnading capital stock of Purchaser. At the effective time of the Merger, each share of Purchaser was converted into a share of the surivving company's common stock.