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Fiserv, Inc., together with its subsidiaries, provides payments and financial services technology services in the United States, Europe, the Middle East and Africa, Latin America, the Asia-Pacific, and internationally. It operates through Merchant Acceptance, Financial Technology, and Payments and Network segments. The Merchant Acceptance segment provides merchant acquiring and digital commerce services; mobile payment services; security and fraud protection products; Clover, a cloud based POS and integrated commerce operating system for small and mid-sized businesses and independent software vendors; and Carat, an integrated operating system for large businesses. This segment distributes through various channels, including direct sales teams, strategic partnerships with agent sales forces, independent software vendors, financial institutions, and other strategic partners in the form of joint venture alliances, revenue sharing alliances, and referral agreement. The Financial Technology segment offers customer deposit and loan accounts, as well as manages an institution's general ledger and central information files. This segment also provides digital banking, financial and risk management, professional services and consulting, check processing, and other products and services. The Payments and Network segment offers card transactions, such as debit, credit, and prepaid card processing and services; funds access, debit payments, cardless ATM access, and surcharge-free ATM network; security and fraud protection products; card production; print services; and various network services, as well as non-card digital payment software and services, including bill payment, account-to-account transfers, person-to-person payments, electronic billing, and security and fraud protection products. It serves merchants, banks, credit unions, other financial institutions, and corporate clients. Fiserv, Inc. was incorporated in 1984 and is headquartered in Milwaukee, Wisconsin.

Public Joint Stock Company Gazprom Neft, an integrated oil company, engages in the exploration, development, production, and sale of crude oil and gas in Russia, the CIS countries, and internationally. The company operates in two segments, Upstream and Downstream. It holds interests in approximately 104 license blocks in Russia; and projects in Angola, Belarus, Bulgaria, Iraq, Italy, Kazakhstan, Tajikistan, Kyrgyzstan, Latvia, Estonia, Bosnia and Herzegovina, Hungary, Romania, Serbia, and Venezuela. As of December 31, 2020, the company had total proved and probable hydrocarbons reserves of 3.9 billion tons of oil equivalent. Public Joint Stock Company Gazprom Neft is also involved in the production, distribution, and marketing of refined petroleum products. In addition, it produces and sells motor and jet fuels, lubricants, bitumen products, and petrochemical products, as well as provides bunkering services. The company also distributes and markets its fuel through 1,870 filling stations. The company was incorporated in 1995 and is based in St. Petersburg, Russia. Public Joint Stock Company Gazprom Neft is a subsidiary of PJSC Gazprom.

Halliburton Company provides products and services to the energy industry worldwide. It operates through two segments, Completion and Production, and Drilling and Evaluation. The Completion and Production segment offers production enhancement services that include stimulation and sand control services; cementing services, such as well bonding and casing, and casing equipment; and completion tools that offer downhole solutions and services, including well completion products and services, intelligent well completions, and service tools, as well as liner hanger, sand control, and multilateral systems. This segment also provides electrical submersible pumps, as well as artificial lift services; production solutions comprising coiled tubing, hydraulic workover units, downhole tools, and pumping and nitrogen services; pipeline and process services, such as pre-commissioning, commissioning, maintenance, and decommissioning; and specialty chemicals and services. The Drilling and Evaluation segment offers drilling fluid systems, performance additives, completion fluids, solids control, specialized testing equipment, and waste management services; drilling systems and services; wireline and perforating services consists of open-hole logging, and cased-hole and slickline; and drill bits and services comprising roller cone rock bits, fixed cutter bits, hole enlargement, and related downhole tools and services, as well as coring equipment and services. This segment also provides cloud based digital services and artificial intelligence solutions on an open architecture for subsurface insights, integrated well construction, and reservoir and production management; testing and subsea services, such as acquisition and analysis of reservoir information and optimization solutions; and project management and integrated asset management services. Halliburton Company was founded in 1919 and is based in Houston, Texas.

Schlumberger Limited engages in the provision of technology for the energy industry worldwide. The company operates through four divisions: Digital & Integration, Reservoir Performance, Well Construction, and Production Systems. The company provides field development and hydrocarbon production, carbon management, and integration of adjacent energy systems; reservoir interpretation and data processing services for exploration data; and well construction and production improvement services and products. It also offers subsurface geology and fluids evaluation information; open and cased hole services; exploration and production pressure, and flow-rate measurement services; and pressure pumping, well stimulation, and coiled tubing equipment solutions. In addition, the company offers mud logging, directional drilling, measurement-while-drilling, and logging-while-drilling services, as well as engineering support services; supplies drilling fluid systems; designs, manufactures, and markets roller cone and fixed cutter drill bits; bottom-hole-assembly and borehole enlargement technologies; well cementing products and services; well planning, well drilling, engineering, supervision, logistics, procurement, and contracting of third parties, as well as drilling rig management solutions; and drilling equipment and services, as well as land drilling rigs and related services. Further, it provides artificial lift production equipment and optimization services; supplies packers, safety valves, sand control technology, and various intelligent well completions technology and equipment; designs and manufactures valves, chokes, actuators, and surface trees; and OneSubsea, an integrated solutions, products, systems, and services, including wellheads, subsea trees, manifolds and flowline connectors, control systems, connectors, and services. The company was formerly known as Socie´te´ de Prospection E´lectrique. Schlumberger Limited was founded in 1926 and is based in Houston, Texas.

Subsea 7 S.A. delivers offshore projects and services for the energy industry worldwide. It provides subsea field development products and services, including project management, design and engineering, procurement, fabrication, survey, installation, and commissioning of production facilities on the seabed and the tie-back of its facilities to fixed or floating platforms or to the shore. The company also offers engineering, procurement, commissioning, and installation of subsea umbilicals, risers, and flowlines; inspection, repair, maintenance, remote intervention, and integrity management of subsea infrastructure services; conventional services comprising fabrication, installation, extension, and refurbishment of fixed and floating platforms and associated pipelines in shallow water; and hook-up services. In addition, it operates heavy lifting operations and heavy transportation services for renewables structures; and installs offshore wind turbine foundations, as well as engages in the decommissioning of redundant offshore structures. Further, the company provides remotely operated vehicles (ROVs) and tooling services to support exploration and production activities, as well as engineering and advisory services for customers in the oil and gas, renewables, and utilities industries. The company was incorporated in 1993 and is based in Luxembourg City, Luxembourg.