Energy XXI is an independent oil & natural gas exploration and production company whose growth strategy emphasizes acquisitions, enhanced by its value-added organic drilling program.

Securities Outstanding

Energy XXI securities in issue are as follows:

Common shares as of July 31, 2011:

  

50,819,116

Approximately 5.5% of the common shares are held by Energy XXI management and directors. Insofar as the company is aware, 0% of the common shares are held by investors (included below) who individually own 10% or more of those securities. As a result, 5.4% of the common shares are deemed to be not in public hands.

Below is a list of significant holders (Updated 6/30/11)

Mount Kellett Capital Management LP

New York

NY

6/30/2011

5,923,158

7.78%

BlackRock Advisors LLC

New York

NY

6/30/2011

5,043,402

6.62%

Omega Advisors, Inc.

New York

NY

6/30/2011

3,679,638

4.83%

The Vanguard Group, Inc.

Malvern

PA

6/30/2011

3,166,442

4.16%

Rainier Investment Management, Inc.

Seattle

WA

6/30/2011

2,948,356

3.87%

BlackRock Fund Advisors

San Francisco

CA

6/30/2011

2,411,829

3.17%

Senator Investment Group

New York

NY

6/30/2011

2,000,000

2.63%

JPMorgan Asset Management (UK) Ltd.

London

6/30/2011

1,654,982

2.17%

State Street Global Advisors

Boston

MA

6/30/2011

1,647,683

2.16%

Friess Associates LLC

Greenville

DE

6/30/2011

1,560,896

2.05%