• Oiltek, Inc.
• WSP Holdings LTD
• Itoco Inc.
• J.W. Wright, Inc.
• Stassco Pressure Control, L.L.C.
• HWC Ltd
• Boots & Coots Services, LLC
• IWC Engineering, Inc.
• Hell Fighters, Inc.
• ELMAGCO, Inc.
• Boots & Coots Services, Inc.
• Boots & Coots Special Services, Inc.
• Stassco Holdings, Inc.
• Snubco USA, Inc.
• New GulfMark Offshore, Inc.
• West-Core Drilling, Inc.
• Integrated Drilling Equipment Holdings Corp
• Acute Technological Services, Inc.
• OSES International Holding, L.L.C.
• Capstar Drilling LP, L.L.C.
• Capstar Drilling, Inc.
• Capstar Holding, L.L.C.
• General Marine Leasing, LLC
• Oil States Industries, Inc.
• Oil States Management, Inc.
• Oil States Skagit SMATCO, LLC
• PTI Group USA LLC
• PTI Mars Holdco 1, LLC
• Sooner Holding Co
• Sooner Inc.
• Sooner Pipe, L.L.C.
• Specialty Rental Tools & Supply, L.L.C.
• Stinger Wellhead Protection, Inc
• Well Testing, Inc.
• BlueFire Equipment Corp
• DNOW Inc.
• Superior Drilling Products Inc
• Weatherford International plc
• Oilfield Safety Holdings Inc
• TechnipFMC plc
• Solaris Energy Infrastructure Inc.
• Cactus Inc.
• Baker Hughes Company
• AFG Holdings, Inc.
• 10SION Holdings Inc.
• Stratim Cloud Acquisition Corp
• Drax, Industries Inc.
• Drilling Tools International Corporation
• Innovex Downhole Solutions, Inc.
• Leishen Energy Holding Co., Ltd.

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