Noble Corporation Plc (NE)
Noble Corporation plc operates as an offshore drilling contractor for the oil and gas industry worldwide.
Precision Drilling Corporation (PDS)
Precision Drilling Corporation, a drilling company, provides onshore drilling, completion, and production services to exploration and production companies in the oil and natural gas and geothermal industries.
Helmerich & Payne, Inc. (HP)
Helmerich & Payne, Inc., together with its subsidiaries, provides drilling services and solutions for exploration and production companies.