First Reserve

Venterra is a company established in 2021 and located in Sheffield, United Kingdom, specializing in the engineering, construction, and operational support of offshore wind energy developments globally. The company offers comprehensive project management and engineering services that span the entire lifecycle of offshore wind farms, from initial concept design to decommissioning. Venterra's capabilities include conducting environmental and geotechnical analyses, as well as hydrographic surveys. By acquiring early-stage wind energy operators and leveraging streamlined systems and technology, Venterra aims to facilitate the energy transition to wind power while advancing its own net zero strategy.

Palmdale Oil Company is a petroleum fuel and oil wholesale distribution company.

Goldfield is provider of electrical construction services engaged in the construction of electrical infrastructure for the utility industry

Lamons is an oil and energy company focused on manufacturing industrial sealing solutions for the petroleum refining, petrochemical, and oil field sectors. The company provides a range of products including gaskets, fasteners, hose assemblies, and specialty bolts. These items are designed for mission-critical applications and are available for immediate delivery, ensuring that clients can access essential equipment promptly. Lamons is dedicated to serving the needs of its industrial market, delivering high-quality components that meet rigorous standards.

IRISNDT Corp. specializes in nondestructive testing (NDT) and materials engineering services, catering primarily to the oil and gas, petrochemical, chemical, power generation, and pipeline industries. Founded in 1953 and headquartered in Edmonton, Canada, the company offers a comprehensive range of NDT technologies, including automated ultrasonics and pipeline integrity solutions. Its services encompass inspection of fabricated structures, maintenance and emergency support for chemical processing and petrochemical plants, and specialized inspections for the power generation sector. Additionally, IRISNDT provides various pipeline services such as radiographic inspection and assessments for stress corrosion cracking, corrosion, and manufacturing defects. The company operates across multiple locations in Canada and the United States, delivering solutions that enhance operational efficiency, reduce unplanned downtime, and improve safety in industrial operations.

Weir Flow Control ("WFC") is a designer, manufacturer and aftermarket services provider of engineered valves and pumps used in energy and broader industrial applications. WFC consists of global brands in niche applications supporting safe, reliable and efficient energy and industrial processes worldwide.

Refuel is a retail fuel distribution and convenience store chain with over a decade presence in this growth market.

Blue Racer Midstream develops and delivers midstream infrastructure and services. It offers natural gas gathering, compression, treating, processing, and transportation; condensate handling; and the fractionation, storage, transportation, and marketing of natural gas liquids.

Dresser Natural Gas Solutions is a leading provider of measurement, instrumentation, and piping solutions to the natural gas distribution.

Lucero Energy is an independent oil company that specializes in the acquisition, development, and production of oil-weighted assets in the Bakken and Three Forks formations located in the Williston Basin of North Dakota. The company is actively involved in consolidating interests in these regions, aiming to enhance its operational efficiency and resource extraction capabilities.

Lucero Energy is an independent oil company that specializes in the acquisition, development, and production of oil-weighted assets in the Bakken and Three Forks formations located in the Williston Basin of North Dakota. The company is actively involved in consolidating interests in these regions, aiming to enhance its operational efficiency and resource extraction capabilities.

EMS USA is an integrated solution provider for all pipeline and facility maintenance, integrity, measurement and automation services.

Founded in 1979, Dyer & Butler is a regional contractor with a solid financial and technical base spanning a wide spectrum of civil engineering and building.

Texas American Resources Company is a privately held independent oil and gas exploration firm based in Austin, Texas. Founded in 1990 by David E. Honeycutt, the company manages and operates over 90,000 acres in South Texas and the Texas Panhandle, focusing on the Eagle Ford and Austin Chalk formations. With a strategic emphasis on building an oil-focused portfolio, Texas American Resources engages in technology-driven organic development and strategic acquisitions, having overseen transactions exceeding $500 million in its 25 years of operation. The company's multi-disciplined team, which includes specialists in geology, engineering, finance, and land management, employs a subsurface-driven approach to enhance hydrocarbon recovery, prioritizing both efficiency and responsible practices.

Applied-Cleveland Holdings, Inc. provides third party inspection services for the maintenance of oil and natural gas transmission, distribution, midstream and gathering lines, and other critical infrastructure. Other infrastructure includes refinery, power plant, compressor and pump stations, and mechanical integrity projects. A-C also offers complementary, specialized nondestructive and qualification services across the entire spectrum of the industry.

Morrison Utility Services (“MUS” or “the company”), the leading provider of utility infrastructure services in the United Kingdom.

Plains All American Pipeline is engaged in the transportation, storage, terminalling and marketing of crude oil, as well as in the processing, transportation, fractionation, storage and marketing of natural gas liquids ("NGL"). We own and operate a diversified portfolio of strategically located assets that play a vital role in the movement of U.S. and Canadian energy supplies. On average we handle over 3.5 million barrels per day of crude oil and NGL through our extensive network of assets located in key North American producing basins, major market hubs and transportation gateways. The company is headquartered in Houston.

Navigator Energy Services, LLC is an independent midstream company that specializes in developing and delivering essential midstream infrastructure solutions for oil and gas producers. The company focuses on providing a range of services, including crude and gas gathering, tank construction, mainline transportation, project planning, and business development. By prioritizing operational flexibility and maximizing the value of hydrocarbons, Navigator Energy Services aims to meet the increasing demands of the energy sector effectively.

TNT Crane & Rigging, Inc. is a provider of crane services and specialized lifting solutions, offering a range of equipment including hydraulic truck cranes, gantry jacks, forklifts, and trailers. Founded in 1985 and headquartered in Houston, Texas, the company serves various sectors, including oil and gas, refining, petrochemical, power, commercial, construction, and industrial markets across the United States. TNT Crane & Rigging is equipped to handle complex projects, including wind farm construction and maintenance, as well as the erection, fabrication, and installation of commercial machinery. The company filed for reorganization under Chapter 11 in August 2020, seeking to restructure its operations.

Ascent Resources is an oil and gas exploration and production company that specializes in acquiring, developing, and producing natural gas and oil in the Appalachian Basin. The company holds approximately 300,000 net acres of land in this region, which is known for its significant potential for shale oil, liquids, and natural gas. Ascent Resources is committed to providing equal employment opportunities to all individuals, ensuring a diverse and inclusive workplace.

TPC Group Inc. is a chemicals manufacturer that specializes in producing value-added products derived from petrochemical raw materials, primarily focusing on C4 hydrocarbons. The company operates in two main segments: C4 Processing and Performance Products. The C4 Processing segment offers butadiene for synthetic rubber production, butene-1 for plastic resins, and other derivatives critical for gasoline blending and alkylate manufacturing. In the Performance Products segment, TPC Group provides high purity isobutylene for synthetic rubber and lubricant additives, along with polyisobutylenes used in various applications including adhesives and sealants. Additionally, the company offers diisobutylene, nonene, and tetramer for the production of surfactants and plasticizers. Founded in 1943 and headquartered in Houston, Texas, TPC Group has evolved from its original name, Texas Petrochemicals Inc., which it changed in 2010. The company also plays a crucial role in providing infrastructure and logistics services along the Gulf Coast, supporting its extensive operations in the chemical and petroleum sectors.

Amromco Energy LLC is a privately-held independent exploration and production company based in Houston, Texas with offices in New York, Bucharest and Ploiesti, Romania. The company's core business is the enhancement of existing oil and gas fields in emerging markets such as Romania. Amromco is the first private company to produce hydrocarbons in Romania in the past fifty years with first gas production established June, 2003. The company is the Operator of enhancement activities for twenty-eight gas fields in Romania and is actively pursuing other opportunities in Romania and other countries in Central and South East Europe.

Barra Energia Petroleo e Gas is an oil exploration and production company based in Rio de Janeiro, Brazil, focusing on offshore basins. It specializes in leveraging technical and commercial expertise, along with local knowledge, to identify, develop, and produce hydrocarbon resources. As one of the pioneering independent Brazilian firms to invest in pre-salt assets, Barra Energia holds a stake in a post-salt producing field in the Santos Basin, along with interests in other petroleum basins such as Campos and Espírito Santo. The company’s operations reflect a commitment to harnessing Brazil's rich oil resources in a rapidly evolving energy market.

Acteon Group Limited provides specialist subsea services for the oil and gas industry in the United Kingdom and internationally. The company provides survey, monitoring, and data services, such as high precision subsea measurement and management of assets and the asset environment; riser and mooring services, including design, supply, installation, relocation, and decommissioning; and machinery rental services.

CiDRA Holdings LLC, founded in 1996 and headquartered in Wallingford, Connecticut, develops innovative instrumentation solutions for measurement, monitoring, and control across various industries. The company specializes in flow and entrained air measurement, grind management, and process optimization, utilizing its patented SONARtrac® flow technology, which is particularly effective in challenging slurry applications within the energy and natural resource sectors. CiDRA's products and services cater to industries such as minerals processing, oil sands, concrete, power generation, dredging, and water/wastewater, helping over 250 customers in 21 countries to enhance process efficiency, maximize recovery, and reduce operational costs. By converting data into actionable insights, CiDRA supports businesses in achieving their performance goals and optimizing industrial operations.