Occidental Petroleum Corp.
Resolve Exploration Corp.
Crimson Energy Partners IV LLC
Aethon Energy Operating LLC
Southwestern Production Corp.
Mackey Consulting & Leasing
Neptune Energy Group Ltd.
Renos Land & Minerals Co.
Occidental Petroleum Corp.
Boyd & McWilliams Operating LLC
Lewis Petroleum Properties
Southwestern Production Corp.
Continental Resources Inc.
Burlington Resources Oil & Gas Co.