d1187143_13g.htm


UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, DC 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934
(Amendment No.  )


Petrohawk Energy Corporation
(Name of Issuer)


Common Stock, par value $.001 per share
(Title of Class of Securities)


716495106
(CUSIP Number)


April 4, 2011
(Date of Event Which Requires Filing of this Statement)


Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

[_]  Rule 13d-1(b)

[X]  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).


 
 
 


CUSIP No.
716495106
    
     
     
1.
NAME OF REPORTING PERSONS
  
 
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
  
     
 
Soroban Master Fund LP
  
     
2.
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
   
(a)  [_]
   
(b)  [X]
     
3.
SEC USE ONLY
  
     
     
     
4.
CITIZENSHIP OR PLACE OF ORGANIZATION
  
     
 
Cayman Islands
  
     
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH
     
5.
SOLE VOTING POWER
  
     
 
0
  
     
6.
SHARED VOTING POWER
  
     
 
16,357,600
  
     
7.
SOLE DISPOSITIVE POWER
  
     
 
0
  
     
8.
SHARED DISPOSITIVE POWER
  
     
 
16,357,600
  
     
9.
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     
 
16,357,600
  
     
10.
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
 
[_]
     
     
11.
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
  
     
 
5.4%
  
     
12.
TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
  
     
 
PN
  

 
 
 


CUSIP No.
716495106
    
     
     
1.
NAME OF REPORTING PERSONS
  
 
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
  
     
 
Soroban Capital Partners LLC
  
     
2.
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
   
(a)  [_]
   
(b)  [X]
     
3.
SEC USE ONLY
  
     
     
     
4.
CITIZENSHIP OR PLACE OF ORGANIZATION
  
     
 
Delaware
  
     
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH
     
5.
SOLE VOTING POWER
  
     
 
0
  
     
6.
SHARED VOTING POWER
  
     
 
16,357,600
  
     
7.
SOLE DISPOSITIVE POWER
  
     
 
0
  
     
8.
SHARED DISPOSITIVE POWER
  
     
 
16,357,600
  
     
9.
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     
 
16,357,600
  
     
10.
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
 
[_]
     
     
11.
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
  
     
 
5.4%
  
     
12.
TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
  
     
 
OO, IA
  

 
 
 


CUSIP No.
716495106
    
     
     
1.
NAME OF REPORTING PERSONS
  
 
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
  
     
 
Eric W. Mandelblatt
  
     
2.
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
   
(a)  [_]
   
(b)  [X]
     
3.
SEC USE ONLY
  
     
     
     
4.
CITIZENSHIP OR PLACE OF ORGANIZATION
  
     
 
United States of America
  
     
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH
     
5.
SOLE VOTING POWER
  
     
 
0
  
     
6.
SHARED VOTING POWER
  
     
 
16,357,600
  
     
7.
SOLE DISPOSITIVE POWER
  
     
 
0
  
     
8.
SHARED DISPOSITIVE POWER
  
     
 
16,357,600
  
     
9.
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     
 
16,357,600
  
     
10.
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
 
[_]
     
     
11.
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
  
     
 
5.4%
  
     
12.
TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
  
     
 
HC, IN
  

 
 
 



CUSIP No.
716495106
  

Item 1.
(a).
Name of Issuer:
     
   
Petrohawk Energy Corporation

 
(b).
Address of issuer's principal executive offices:
     
   
1000 Louisiana Street, Suite 5600
Houston, Texas 77002


Item 2.
(a).
Name of person filing:
     
   
Soroban Master Fund LP
Soroban Capital Partners LLC
Eric W. Mandelblatt

 
(b).
Address or principal business office or, if none, residence:
     
   
Soroban Master Fund LP
Gardenia Court, Suite 3307
45 Market Street
Camana Bay, Grand Cayman KY1-1103
Cayman Islands
 
Soroban Capital Partners LLC
444 Madison Avenue, 12th Floor
New York, NY 10022
 
Eric W. Mandelblatt
c/o Soroban Capital Partners LLC
444 Madison Avenue, 12th Floor
New York, NY 10022

 
(c).
Citizenship:
     
   
Soroban Master Fund LP – Cayman Islands
Soroban Capital Partners LLC – Delaware
Eric W. Mandelblatt – United States of America

 
(d).
Title of class of securities:
     
   
Common Stock, par value $.001 per share

 
(e).
CUSIP No.:
     
   
716495106


Item 3.
  
If This Statement is filed pursuant to §§.240.13d-1(b) or 240.13d-2(b), or (c), check whether the person filing is a

 
(a)
[_]
Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o).

 
(b)
[_]
Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c).

 
(c)
[_]
Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c).

 
(d)
[_]
Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8).

 
(e)
[_]
An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);

 
(f)
[_]
An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);

 
(g)
[_]
A parent holding company or control person in accordance with §240.13d-1(b)(1)(ii)(G);

 
(h)
[_]
A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C.1813);

 
(i)
[_]
A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);

 
(j)
[_]
A non-U.S. institution in accordance with §240.13d-1(b)(1)(ii)(J);
 
 
(k)
[_]
Group, in accordance with §240.13d-1(b)(1)(ii)(K).  If filing as a non-U.S. institution in accordance with §240.13d-1(b)(1)(ii)(J), please specify the type of institution:
 
       


Item 4.
Ownership.

 
Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.

 
(a)
Amount beneficially owned:
     
   
Soroban Master Fund LP – 16,357,600
Soroban Capital Partners LLC – 16,357,600
Eric W. Mandelblatt – 16,357,600

 
(b)
Percent of class:
     
   
Soroban Master Fund LP – 5.4%
Soroban Capital Partners LLC – 5.4%
Eric W. Mandelblatt – 5.4%

 
(c)
Number of shares as to which Soroban Master Fund LP has:
     
   
(i)
Sole power to vote or to direct the vote
0
,
         
   
(ii)
Shared power to vote or to direct the vote
16,357,600
,
         
   
(iii)
Sole power to dispose or to direct the disposition of
0
,
         
   
(iv)
Shared power to dispose or to direct the disposition of
16,357,600
.
         
         
   
Number of shares to which Soroban Capital Partners LLC has :
  
         
   
(i)
Sole power to vote or to direct the vote
0
         
   
(ii)
Shared power to vote or to direct the vote
16,357,600
         
   
(iii)
Sole power to dispose or to direct the disposition of
0
         
   
(iv)
Shared power to dispose or to direct the disposition of
16,357,600
         
         
   
Number of shares to which Eric W. Mandelblatt has :
    
         
   
(i)
Sole power to vote or to direct the vote
0
         
   
(ii)
Shared power to vote or to direct the vote
16,357,600
         
   
(iii)
Sole power to dispose or to direct the disposition of
0
         
   
(iv)
Shared power to dispose or to direct the disposition of
16,357,600
         


 
Instruction:  For computations regarding securities which represent a right to acquire an underlying security see §240.13d-3(d)(1).
   
   
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 [  ].
 
   
   

Item 6.
Ownership of More Than Five Percent on Behalf of Another Person.

 
If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified.  A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required.
   
 
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.

 
If a parent holding company or control person has filed this schedule, pursuant to Rule 13d-1(b)(1)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary.  If a parent holding company or control person has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary.
   
 
Not applicable
   

Item 8.
Identification and Classification of Members of the Group.

 
If a group has filed this schedule pursuant to §240.13d-1(b)(1)(ii)(J), so indicate under Item 3(j) and attach an exhibit stating the identity and Item 3 classification of each member of the group.  If a group has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identity of each member of the group.
   
 
Not applicable
   

Item 9.
Notice of Dissolution of Group.

 
Notice of dissolution of a group may be furnished as an exhibit stating the date of the dissolution and that all further filings with respect to transactions in the security reported on will be filed, if required, by members of the group, in their individual capacity.  See Item 5.
   
 
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 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.



   
April 11, 2011
  
   
(Date)
  
   
 
SOROBAN MASTER FUND LP
   
 
By:
 /s/ Eric W. Mandelblatt
  
   
Eric W. Mandelblatt
   
Authorized Signatory
   
   
   
 
SOROBAN CAPITAL PARTNERS LLC
   
 
By:
 /s/ Eric W. Mandelblatt
  
   
Eric W. Mandelblatt
   
Managing Partner
   
   
   
 
ERIC W. MANDELBLATT
 
/s/ Eric W. Mandelblatt


The original statement shall be signed by each person on whose behalf the statement is filed or his authorized representative.  If the statement is signed on behalf of a person by his authorized representative other than an executive officer or general partner of the filing person, evidence of the representative's authority to sign on behalf of such person shall be filed with the statement, provided, however, that a power of attorney for this purpose which is already on file with the Commission may be incorporated by reference.  The name and any title of each person who signs the statement shall be typed or printed beneath his signature.

Note.  Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See s.240.13d-7 for other parties for whom copies are to be sent.

Attention.  Intentional misstatements or omissions of fact constitute Federal criminal violations (see 18 U.S.C. 1001).



 
 
 



Exhibit A


AGREEMENT


Each of the undersigned hereby consents and agrees to this joint filing on Schedule 13G for the Common Stock, par value $.001 per share of Petrohawk Energy Corporation

   
April 11, 2011
  
   
(Date)
  
   
 
SOROBAN MASTER FUND LP
   
 
By:
 /s/ Eric W. Mandelblatt
  
   
Eric W. Mandelblatt
   
Authorized Signatory
   
   
   
 
SOROBAN CAPITAL PARTNERS LLC
   
 
By:
 /s/ Eric W. Mandelblatt
  
   
Eric W. Mandelblatt
   
Managing Partner



 
ERIC W. MANDELBLATT
 
/s/ Eric W. Mandelblatt
   

 
 

SK 27021 0001 1187143