Rdh Energy INC

(713) 785-3640 Po Box 420282 Houston, TX 77242

Lrr Energy LP

(713) 292-9510 1111 Bagby St # 4600 Houston, TX 77002

Keystone Energy Partners Lp

(713) 885-9300 1111 Bagby St Ste 2510 Houston, TX 77019

Sanchez Energy

(956) 722-8092 1111 Bagby St 1600 Houston, TX 77002

Capital One Energy

(713) 650-4930 1000 Louisiana St Houston, TX 77002

Petrohawk Energy Corp

(832) 204-2700 1000 Louisiana St Ste 5600 Houston, TX 77002

Dynegy Marketing & Trade

(713) 507-6400 1000 Louisiana St Ste 5800 Houston, TX 77002

Helix Energy Solutions

(281) 618-0590 500 Dallas St 200 Houston, TX 77002

Gulf Coast Energy Resources LLC Gcer Offshore LLC

(985) 630-8993 500 Dallas St 2000 Houston, TX 77002

Texican Indus Energy Mktg LLC

(713) 650-6579 500 Dallas St 1450 Houston, TX 77002

Women's Energy Network-Houston

(713) 229-1366 910 Louisiana St Houston, TX 77002

Black Elk Energy LLC

1000 Louisiana St 2000 Houston, TX 77002