Page 1 of 16 Pages

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D
(Rule 13d-101)

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO
RULE 13d-2(a)

Under the Securities Exchange Act of 1934
(Amendment No. 3 )*

Huntsman Corporation
(Name of Issuer)

Common Stock, $0.01 par value
(Title of Class of Securities)

447011107
(CUSIP Number)

John C. Nagel
Citadel Investment Group, L.L.C.
131 S. Dearborn Street, 32nd Floor
Chicago, Illinois 60603
(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

October 26, 2008
(Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the following box. £

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See Rule 13d-7 for other parties to whom copies are to be sent.

*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 disclosures provided in a prior cover page. The information required on 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. 447011107
 
Page 2 of 16 Pages
 
1
NAME OF REPORTING PERSON
I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY)
 
Citadel Limited Partnership
 
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a)S
(b)S*
3
SEC USE ONLY
 
4
SOURCE OF FUNDS
AF
5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)           £
 
6
CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
 
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH
7
SOLE VOTING POWER
0
8
SHARED VOTING POWER
18,604,310 shares
9
SOLE DISPOSITIVE POWER
0
10
SHARED DISPOSITIVE POWER
See Row 8 above.
11
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON                        £
See Row 8 above.
12
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES                         £
13
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
7.94 percent
14
TYPE OF REPORTING PERSON
PN, HC
 

* See Item 4.
 See Item 3 and Item 5.
 


 
CUSIP No. 447011107
 
Page 3 of 16 Pages

1
NAME OF REPORTING PERSON
I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY)
 
Citadel Investment Group, L.L.C.
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a)S
(b)S*
3
SEC USE ONLY
 
4
SOURCE OF FUNDS
AF
5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)           £
 
6
CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
 
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH
7
SOLE VOTING POWER
0
8
SHARED VOTING POWER
18,604,310 shares
9
SOLE DISPOSITIVE POWER
0
10
SHARED DISPOSITIVE POWER
See Row 8 above.
11
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON                        £
See Row 8 above.
12
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES                         £
13
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
7.94 percent
14
TYPE OF REPORTING PERSON
OO, HC
 

* See Item 4.
 See Item 3 and Item 5.




CUSIP No. 447011107
 
Page 4 of 16 Pages

1
NAME OF REPORTING PERSON
I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY)
 
Citadel Equity Fund Ltd.
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a)S
(b)S*
3
SEC USE ONLY
 
4
SOURCE OF FUNDS
WC
5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)           £
 
6
CITIZENSHIP OR PLACE OF ORGANIZATION
Cayman Islands
 
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH
7
SOLE VOTING POWER
0
8
SHARED VOTING POWER
18,604,310 shares
9
SOLE DISPOSITIVE POWER
0
10
SHARED DISPOSITIVE POWER
See Row 8 above.
11
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON                        £
See Row 8 above.
12
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES                         £
13
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
7.94 percent
14
TYPE OF REPORTING PERSON
CO
 

* See Item 4.
 See Item 3 and Item 5.




CUSIP No. 447011107
 
Page 5 of 16 Pages

1
NAME OF REPORTING PERSON
I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY)
 
Citadel Investment Group II, L.L.C.
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a)S
(b)S*
3
SEC USE ONLY
 
4
SOURCE OF FUNDS
AF
5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)           £
 
6
CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
 
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH
7
SOLE VOTING POWER
0
8
SHARED VOTING POWER
18,604,310 shares
9
SOLE DISPOSITIVE POWER
0
10
SHARED DISPOSITIVE POWER
See Row 8 above.
11
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON                        £
See Row 8 above.
12
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES                          £
13
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
7.94 percent
14
TYPE OF REPORTING PERSON
OO, HC
 

* See Item 4.
 See Item 3 and Item 5.




CUSIP No. 447011107
 
Page 6 of 16 Pages

1
NAME OF REPORTING PERSON
I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY)
 
Citadel Holdings I LP
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a)S
(b)S*
3
SEC USE ONLY
 
4
SOURCE OF FUNDS
AF
5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)           £
 
6
CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
 
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH
7
SOLE VOTING POWER
0
8
SHARED VOTING POWER
18,604,310 shares
9
SOLE DISPOSITIVE POWER
0
10
SHARED DISPOSITIVE POWER
See Row 8 above.
11
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON                        £
See Row 8 above.
12
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES                         £
13
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
7.94 percent
14
TYPE OF REPORTING PERSON
PN, HC
 

* See Item 4.
 See Item 3 and Item 5.
 


CUSIP No. 447011107
 
Page 7 of 16 Pages

1
NAME OF REPORTING PERSON
I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY)
 
Citadel Derivatives Group LLC
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a)S
(b)S*
3
SEC USE ONLY
 
4
SOURCE OF FUNDS
WC
5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)           £
 
6
CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
 
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH
7
SOLE VOTING POWER
0
8
SHARED VOTING POWER
18,604,310 shares
9
SOLE DISPOSITIVE POWER
0
10
SHARED DISPOSITIVE POWER
See Row 8 above.
11
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON                        £
See Row 8 above.
12
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES                 £
13
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
7.94 percent
14
TYPE OF REPORTING PERSON
OO, BD
 

* See Item 4.
 See Item 3 and Item 5.




CUSIP No. 447011107
 
Page 8 of 16 Pages

1
NAME OF REPORTING PERSON
I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY)
 
Citadel Holdings II LP
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a)S
(b)S*
3
SEC USE ONLY
 
4
SOURCE OF FUNDS
AF
5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)           £
 
6
CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
 
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH
7
SOLE VOTING POWER
0
8
SHARED VOTING POWER
18,604,310 shares
9
SOLE DISPOSITIVE POWER
0
10
SHARED DISPOSITIVE POWER
See Row 8 above.
11
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON                        £
See Row 8 above.
12
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES                         £
13
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
7.94 percent
14
TYPE OF REPORTING PERSON
PN, HC
 

* See Item 4.
 See Item 3 and Item 5.




CUSIP No. 447011107
 
Page 9 of 16 Pages

1
NAME OF REPORTING PERSON
I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY)
 
Citadel Advisors LLC
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a)S
(b)S*
3
SEC USE ONLY
 
4
SOURCE OF FUNDS
AF
5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)           £
 
6
CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
 
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH
7
SOLE VOTING POWER
0
8
SHARED VOTING POWER
18,604,310 shares
9
SOLE DISPOSITIVE POWER
0
10
SHARED DISPOSITIVE POWER
See Row 8 above.
11
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON                        £
See Row 8 above.
12
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES                         £
13
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
7.94 percent
14
TYPE OF REPORTING PERSON
OO, HC
 

* See Item 4.
 See Item 3 and Item 5.
 


CUSIP No. 447011107
 
Page 10 of 16 Pages

1
NAME OF REPORTING PERSON
I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY)
 
Citadel Derivatives Trading Ltd.
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a)S
(b)S*
3
SEC USE ONLY
 
4
SOURCE OF FUNDS
WC
5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)           £
 
6
CITIZENSHIP OR PLACE OF ORGANIZATION
Cayman Islands
 
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH
7
SOLE VOTING POWER
0
8
SHARED VOTING POWER
18,604,310 shares
9
SOLE DISPOSITIVE POWER
0
10
SHARED DISPOSITIVE POWER
See Row 8 above.
11
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON                        £
See Row 8 above.
12
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES                          £
13
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
7.94 percent
14
TYPE OF REPORTING PERSON
CO
 

* See Item 4.
 See Item 3 and Item 5.




CUSIP No. 447011107
 
Page 11 of 16 Pages

1
NAME OF REPORTING PERSON
I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY)
 
Kenneth Griffin
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a)S
(b)S*
3
SEC USE ONLY
 
4
SOURCE OF FUNDS
AF
5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)           £
 
6
CITIZENSHIP OR PLACE OF ORGANIZATION
United States
 
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH
7
SOLE VOTING POWER
0
8
SHARED VOTING POWER
18,604,310 shares
9
SOLE DISPOSITIVE POWER
0
10
SHARED DISPOSITIVE POWER
See Row 8 above.
11
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON                                £
See Row 8 above.
12
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES                 £
13
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
7.94 percent
14
TYPE OF REPORTING PERSON
IN, HC
 

* See Item 4.
 See Item 3 and Item 5.
 

CUSIP No. 447011107
 
Page 12 of 16 Pages

ITEM 1.
SECURITY AND ISSUER

This Amendment No. 3 amends the Schedule 13D filed on August 1, 2008 (such initial filing, the "Original Filing") by Citadel Investment Group, L.L.C. ("CIG"), Citadel Limited Partnership ("CLP"), Citadel Equity Fund Ltd. ("CEFL"), Citadel Investment Group II, L.L.C. ("CIG-II"), Citadel Holdings I LP ("CH-I"), Citadel Derivatives Group LLC ("CDG"), Citadel Holdings II LP ("CH-II"), Citadel Advisors LLC ("Citadel Advisors"), Citadel Derivatives Trading Ltd. ("CDT") and Kenneth Griffin ("Griffin" and, together with CIG, CLP, CEFL, CIG-II, CH-I, CDG, CH-II, Citadel Advisors and CDT, the "Reporting Persons") relating to the shares of common stock, $0.01 par value per share (the "Common Shares"), of Huntsman Corporation (the "Issuer"), as amended by Amendment No. 1 to Schedule 13D filed by the Reporting Persons on September 2, 2008 ("Amendment No. 1") and Amendment No. 2 to Schedule 13D filed by the Reporting Persons on September 10, 2008 ("Amendment No. 2" and, together with the Original Filing and Amendment No. 1, the "Prior Filing"). Capitalized terms not defined herein shall have the meaning given to them in the Prior Filing.
 
ITEM 4.
PURPOSE OF TRANSACTION

Item 4 of the Prior Filing is amended by deleting the tenth paragraph thereof and adding in its place the following:
 
On October 26, 2008, the Backstop Payment Parties delivered a further letter (the "Amended Backstop Payment Commitment Letter") to the Issuer intended to facilitate the consummation of the Proposed Merger. In the Amended Backstop Payment Commitment Letter, the Backstop Payment Parties proposed to increase (from $230,226,116.00 to $446,537,466.98) certain backstop payments to the Issuer if the Proposed Merger is consummated on the terms provided in the current merger agreement on or prior to November 2, 2008. These cash payments would be added to the combined balance sheet of Huntsman and Hexion at the closing of the Proposed Merger with Hexion. A copy of the Amended Backstop Payment Commitment Letter is attached as Exhibit 99.9.
 
As required by the terms thereof, the Amended Backstop Payment Commitment Letter was accepted by the Issuer on October 26, 2008. The Backstop Payment Parties' several obligations in the Amended Backstop Payment Commitment Letter are also subject to the requirement that, at the closing of the merger, other stockholders of the Company fund the backstop commitments they previously made to Huntsman in an aggregate amount of at least $186,233,986.00, and no dividends or other distributions of value from Huntsman and its subsidiaries to its stockholders are made prior to or in connection with the consummation of the merger (other than payment of the merger consideration in accordance with the terms of the current merger agreement). The Backstop Payment Parties' several obligations under the Amended Backstop Payment Commitment Letter would also be subject to the requirement that Apollo Global Managers LLP or its applicable affiliates (collectively, "Apollo") contributes new equity to Hexion at or prior to the closing of the merger in an aggregate amount of $750 million or more, and that no fees are paid and no dividends or other distributions of value from Hexion to Apollo are made prior to or in connection with the consummation of the merger.
 
As a result of the potential arrangements described in the Proposal Letter, the Commitment Letter, the Backstop Payment Commitment Letter and the Amended Backstop Payment Commitment Letter, the Reporting Persons may be deemed to have formed a "group" with some or all of the Other Investors, the Other Backstop Payment Parties, and/or the Huntsman Participants for purposes of Rule 13d-5(b)(1) promulgated under the 1934 Act; however, the Reporting Persons disclaim membership in a group with the Other Investors, the Other Backstop Payment Parties, and the Huntsman Participants with regard to the Common Shares of the Issuer.
 

 
CUSIP No. 447011107
 
Page 13 of 16 Pages
 
ITEM 5.
INTEREST IN SECURITIES OF THE ISSUER

(a)
Number of shares: 18,604,310 shares1
 
Percentage of shares: 7.94%2
(b)
Sole power to vote or direct the vote: 0
 
Shared power to vote or direct the vote: 18,604,310 shares
 
Sole power to dispose or to direct the disposition: 0
 
Shared power to dispose or direct the disposition: 18,604,310 shares
(c)   The table attached hereto as Exhibit 99.10 sets forth the transactions effected by the Reporting Persons in the Common Shares (and options to purchase or sell such Common Shares) since Amendment No. 2. Such transactions resulted from the exercise by third parties of listed option positions (designated as "option assignments" on Exhibit 99.10) and from the exercise by the Reporting Persons of such listed option positions (designated as "option exercises" on Exhibit 99.10); each such option was previously acquired in open market transactions.
 
(d)
Not applicable.
 
(e)
Not applicable.
 
ITEM 6.
CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT TO SECURITIES OF THE ISSUER

Item 6 of the Prior Filing is amended by adding, after the fifth paragraph, the following:
 
As noted above in Item 4, on October 26, 2008, the Backstop Payment Parties made an amended offer to the Issuer with respect to certain backstop payments to be made to the Issuer in cash. The description of the terms of the Amended Backstop Payment Commitment Letter is a summary, does not purport to be complete and is qualified in its entirety by reference to the Amended Backstop Payment Commitment Letter referred to in Item 7 below as Exhibit 99.9, and which is incorporated herein by reference.
 

1  None of the data with respect to beneficial ownership of Common Shares by the Reporting Persons reported in this Amendment No. 3 includes any Common Shares beneficially owned by the Other Investors, by the Other Backstop Payment Parties or by the Huntsman Participants.
 
2According to the Issuer's Form 10-Q, filed with the Securities and Exchange Commission on August 7, 2008, there were 234,457,138 Common Shares issued and outstanding as of August 4, 2008.
 

 
CUSIP No. 447011107
 
Page 14 of 16 Pages
 
ITEM 7.
MATERIAL TO BE FILED AS EXHIBITS

The following documents are filed as appendices and exhibits (or incorporated by reference herein):
 
Exhibit 99.9:
Amended Backstop Payment Commitment Letter, dated October 26, 2008, from Citadel Limited Partnership, D.E. Shaw Valence Portfolios, L.L.C., D.E. Shaw Oculus Portfolios, L.L.C., MatlinPatterson Global Opportunities Partners, L.P., MatlinPatterson Global Opportunities Partners (Bermuda) L.P. to Huntsman Corporation
Exhibit 99.10:
Transactions required to be reported pursuant to Item 5(c)


 
CUSIP No. 447011107
 
Page 15 of 16 Pages
 
Signature
 
After reasonable inquiry and to the best of its knowledge and belief, the undersigned certify that the information set forth in this statement is true, complete and correct.

Dated this 28th day of October, 2008

CITADEL INVESTMENT GROUP, L.L.C.
 
By:  /s/ John C. Nagel                                      
John C. Nagel, Authorized Signatory
 
CITADEL LIMITED PARTNERSHIP
 
By:  Citadel Investment Group, L.L.C.,
its General Partner
   
By:  /s/ John C. Nagel                                      
John C. Nagel, Authorized Signatory
 
CITADEL EQUITY FUND LTD.
     
By:  Citadel Limited Partnership,
its Portfolio Manager
     
By:  Citadel Investment Group, L.L.C.,
its General Partner
     
By:  /s/ John C. Nagel                                      
John C. Nagel, Authorized Signatory
 
 
CITADEL INVESTMENT GROUP II, L.L.C.
     
By:  /s/ John C. Nagel                                      
John C. Nagel, Authorized Signatory
CITADEL HOLDINGS I LP
 
By:  Citadel Investment Group II, L.L.C.,
its General Partner
     
By:  /s/ John C. Nagel                                      
John C. Nagel, Authorized Signatory
 
CITADEL DERIVATIVES GROUP LLC
 
By:  Citadel Limited Partnership,
its Managing Member
     
By:  Citadel Investment Group, L.L.C.,
its General Partner
     
By:  /s/ John C. Nagel                                      
John C. Nagel, Authorized Signatory
 
CITADEL HOLDINGS II LP
 
By:  Citadel Investment Group II, L.L.C.,
its General Partner
     
By:  /s/ John C. Nagel                                      
John C. Nagel, Authorized Signatory
 
CITADEL ADVISORS LLC
 
By:  Citadel Holdings II LP,
its Managing Member
     
By:  Citadel Investment Group II, L.L.C.,
its General Partner
     
By:  /s/ John C. Nagel                                      
John C. Nagel, Authorized Signatory
 

 
CUSIP No. 447011107
 
Page 16 of 16 Pages
 
CITADEL DERIVATIVES TRADING LTD.
 
By:  Citadel Limited Partnership,
its Portfolio Manager
     
By:  Citadel Investment Group, L.L.C.,
its General Partner
     
By:  /s/ John C. Nagel                                      
John C. Nagel, Authorized Signatory
 
 
KENNETH GRIFFIN
 
By:  /s/ John C. Nagel                              
John C. Nagel, attorney-in-fact*
 

*  John C. Nagel is signing on behalf of Kenneth Griffin as attorney-in-fact pursuant to a power of attorney previously filed with the Securities and Exchange Commission on February 24, 2006, and hereby incorporated by reference herein. The power of attorney was filed as an attachment to a filing by Citadel Limited Partnership on Schedule 13G for Morgans Hotel Group Co.