C. Bunch

ION Geophysical Corp. engages in the provision of geoscience technology, services, and solutions to the oil and gas industry. It operates through the E&P Technology and Services, and Operations Optimization segments. The E&P Technology and Services segment creates digital data assets and delivers services that improve decision-making, mitigate risk and maximize portfolio value for E&P companies. The Operations Optimization segment develops mission-critical subscription offerings and engineering services that enable operational control and optimization offshore. The company was founded in 1968 and is headquartered in Houston, TX.

Maverick Tube Corp. manufactures steel tubular products for gas and oil drilling operations. It offer line pipe for oil and gas surface handling and transportation. The firm sell both structural tubing and standard pipe for transportation, agricultural and construction applications. The company was founded by Don Beattie in 1978 and is located in Chesterfield, MO.

Pioneer Energy Services LLC. engages in the provision of land-based drilling services and production services to oil and gas exploration and production companies. It operates through Drilling and Production Services segments. The Drilling Services segment offers drilling rig, crews, supplies, and most of the ancillary equipment needed to operate drilling rigs. The Production Services segment offers well servicing,wireline and coiled tubing services to producers primarily in Texas and the Mid-Continent and Rocky Mountain regions, as well as in North Dakota, Louisiana and Mississippi. The company was founded in 1968 and is headquartered in San Antonio, TX.

Part of Cooperativa de Telefonos Automaticos La Paz, Tescorp, Inc. is an American company that specializes in creating unique compressor system solutions for specific oil field and gas needs. The company is based in Oklahoma and has been in business for over 35 years. The company's primary product, the TESCORP "BVR-MODULAR 1" Series, is a self-contained compression system used for stock tank vapor recovery, flare gas recovery, or small flow, medium pressure process gas applications. Tescorp was acquired by SuperCanal Holding SA, part of Cooperativa de Telefonos Automaticos La Paz from March 07, 2007 on March 31, 1998 for $59.35 million.

Sub-One Systems LLC produces internal metal coating equipment. It offers InnerArmor coatings, which provide hardness, wear resistance, corrosion control, erosion resistance, and temperature resistance in corrosive or erosive environments, as well as capable of depositing carbon-based coatings, metals, and oxides; and diamondoid coatings made from nanometer-sized carbon-based materials and found in petroleum for internal and external coatings. The firm serves large companies in oil and gas/energy, chemical processing, industry and specialty gas, automotive, food processing, pulp and paper, medical, semiconductor, aerospace, public utilities, geothermal, and metals production industries. The company was founded on August 11, 2008 and is headquartered in Tucson, AZ.

Global Tubing LLC designs, manufactures, and supplies coiled tubing products to the oil and gas industry. It offers spooling, welding, hydrotesting, installation, preventative maintenance, support, and reel storage and asset management services. The company was founded by Neal Lux, Doug Wheeler, and Garry McClelland in April 2007 and is headquartered in Dayton, TX.

Z-Seis Corp. provides oil and gas field services. The company's applications are EOR operations, search for bypassed oil, unconventional gas, drilling and production, and water flood. The company was established in May 2003 and is headquartered in Houston, TX.