Antero Midstream Corporation owns, operates and develops midstream gathering, compression, processing and fractionation assets located in West Virginia and Ohio, as well as integrated water assets which primarily service Antero Resources properties. Antero Midstream Corporation, formerly knonw as Antero Midstream GP LP, is based in Denver, United States.

Apache Corporation is an independent energy company that explores for, develops and produces natural gas, crude oil and natural gas liquids. In North America, Apache's exploration and production interests are focused on the Gulf of Mexico, the Anadarko Basin, the Permian Basin, the Gulf Coast and the Western Sedimentary Basin of Canada. Outside of North America, Apache has exploration and production interests offshore Western Australia and in Egypt, and exploration interests in Poland and offshore The People's Republic of China.

Baker Hughes, a GE Company is a provider of integrated oilfield products, services and digital solutions. Baker Hughes a GE Company, formerly known as Baker Hughes, is based in Houston, United States.

BP p.l.c. is the holding company of one of the world's largest petroleum and petrochemicals groups. Their main activities are exploration and production of crude oil and natural gas; refining, marketing, supply and transportation; and manufacturing and marketing of petrochemicals. They have a growing activity in gas and power and in solar power generation. BP has well-established operations in Europe, North and South America, Australasia and Africa.

Centennial Resource Development, Inc. is an oil and natural gas company. It focuses on the development and acquisition of unconventional oil and associated liquids-rich natural gas reserves in the Permian Basin. Centennial Resource Development Inc., is formerly known as Silver Run Acquisition Corporation, is headquatered in Denver, Colorado.

Core Laboratories N.V. is a leading provider of proprietary and patented Reservoir Description and Production Enhancement services. Core Laboratories' reservoir optimization technologies are used to increase total recovery from existing fields. Core Laboratories' services enable clients to optimize reservoir performance and maximize hydrocarbon recovery from their producing fields. Core Laboratories has taken extensive measures to ensure the services and data provided by all of worldwide companies are of the highest quality and integrity. Core Laboratories' commitment to applying and developing new technologies to optimize reservoir performance is unsurpassed in the oilfield service industry. This commitment to technology and to your bottom line makes Core Laboratories, The Reservoir Optimization Company.

CONTINENTAL RESOURCES is a crude-oil concentrated, independent oil and natural gas exploration and production company with operations in the Rocky Mountain, Mid-Continent and Gulf Coast regions of the United States. The Company focuses its operations in large new and developing plays where horizontal drilling, advanced fracture stimulation and enhanced recovery technologies provide the means to economically develop and produce oil and natural gas reserves from unconventional formations.

CONSOL Energy Inc. is a Canonsburg-based producer and exporter of high-Btu bituminous thermal and crossover metallurgical coal. It owns and operates some of the most productive longwall mining operations in the Northern Appalachian Basin. The company also owns and operates the CONSOL Marine Terminal, which is located in the port of Baltimore.

Cabot Oil & Gas Corp. is independent oil and Gas Company engaged in the exploration, development, acquisition and exploitation of oil and gas properties located in four areas of the United States: the onshore Texas and Louisiana Gulf Coast; the Rocky Mountains; Appalachia; and the Mid-Continent or Anadarko Basin. Cabot's exploration, development and production operations are primarily concentrated in two unconventional plays-the Marcellus Shale in northeast Pennsylvania and the Eagle Ford Shale in south Texas. The Company also has non-core operations in various other unconventional and conventional plays throughout the continental United States. Cabot Oil & Gas Corporation is headquartered in Houston, Texas.

ConocoPhillips is a major global exploration and production (E&P) company with operations all over the world. As year-end 2014, the company had estimated proved reserves of 8.9 billion oil-equivalent barrels (BOE). Production from continuing operations, excluding Libya, averaged 1,532 thousand barrels of oil equivalent per day (MBOED) in 2014. In May 2012, ConocoPhillips completed the spin-off of its refining/sales business into a separate, independent and publicly traded company, Phillips 66 (Ticker: PSX).

Callon Petroleum Company has been engaged in the exploration, development, acquisition and production of oil and gas properties since 1950.

CHENIERE ENERGY PARTNERS, L.P. is a Delaware limited partnership recently formed by Cheniere Energy, Inc. through its wholly owned subsidiary, Sabine Pass LNG, L.P. CEP will develop, own and operate the Sabine Pass LNG receiving terminal currently under construction in western Cameron Parish, Louisiana on the Sabine Pass Channel. CEP's primary business objectives are to complete construction of the Sabine Pass LNG receiving terminal and, thereafter, to generate stable cash flows sufficient to pay the initial quarterly distribution to the unitholders and, over time, to increase their quarterly cash distribution.

Comstock Resources, Inc. is an independent energy company engaged in the acquisition, development, production and exploration of oil and natural gas properties. The company's oil and natural gas reserve base is entirely concentrated in the Gulf of Mexico, Southeast Texas and East Texas/North Louisiana regions.

Chevron Corporation is one of the world's leading integrated energy companies. Through its subsidiaries that conduct business worldwide, the company is involved in virtually every facet of the energy industry. Chevron explores for, produces and transports crude oil and natural gas; refines, markets and distributes transportation fuels and lubricants; manufactures and sells petrochemicals and additives; generates power; and develops and deploys technologies that enhance business value in every aspect of the company's operations.

Concho Resources Inc. is an independent oil and natural gas company engaged in the acquisition, development, exploitation and exploration of oil and natural gas properties. The Company's conventional operations are primarily focused in the Permian Basin of Southeast New Mexico and West Texas. In addition, the Company is involved in a number of unconventional emerging resource plays.

DCP Midstream Partners, LP is a midstream master limited partnership that gathers, treats, compresses, processes, transports and markets natural gas and transports and markets natural gas liquids. DCP Midstream Partners, LP is managed by its general partner, DCP Midstream GP, LLC, which is wholly owned by Duke Energy Field Services, a joint venture between Duke Energy and ConocoPhillips. It is a midstream master limited partnership formed by Duke Energy Field Services to own, operate, acquire and develop a diversified portfolio of complementary midstream assets. Supported by its relationship with Duke Energy Field Services and its parents, Duke Energy and ConocoPhillips, it intend to acquire and construct additional assets and have a management team dedicated to executing our growth strategies.

DELEK US HOLDINGS, INC. is a diversified energy business focused on petroleum refining, marketing and supply of refined products, and retail marketing of fuel and general merchandise.

Diamond Offshore Drilling, Inc. is a leader in offshore drilling, providing contract drilling services to the energy industry around the globe.

Dril-Quip, Inc. is one of the world's leading manufacturers of offshore drilling and production equipment that is well suited for use in deepwater applications. The Company designs and manufactures subsea, surface and offshore rig equipment for use by oil and gas companies and drilling contractors in offshore areas throughout the world. Dril-Quip also provides technical advisory services, reconditioning services and running tools for use in connection with the installation and retrieval of its products. Dril-Quip has manufacturing facilities in the United States, Brazil, Scotland and Singapore. The Company also has sales and service offices in numerous locations throughout the world. Dril-Quip's manufacturing operations are vertically integrated, with the Company performing essentially all of its forging, heat treating, machining, fabrication, inspection, assembly and testing at its own facilities.

Devon Energy is a leading independent energy company engaged in finding and producing oil and natural gas. Based in Oklahoma City and included in the S&P 500, Devon operates in several of the most prolific oil and natural gas plays in the U.S. and Canada with an emphasis on a balanced portfolio. The Company is the second-largest oil producer among North American onshore independents.

ENI explores for, produces, refines, transports and markets natural gas, oil and produces chemicals. ENI offers engineering and project management services to the petroleum industry operating in 80 countries.

Enbridge Inc., a Canadian company, is a leader in energy transportation and distribution in North America and internationally. As a transporter of energy, Enbridge operates, in Canada and the United States, the world's longest crude oil and liquids pipeline system. The Company also has international operations and a growing involvement in the natural gas transmission and midstream businesses. As a distributor of energy, Enbridge owns and operates Canada's largest natural gas distribution company, and provides distribution services in Ontario, Quebec, New Brunswick and New York State.

Enable Midstream Partners, LP owns, operates and develops natural gas and crude oil infrastructure assets serving major producing basins and markets. It operates through two business segments: Gathering and Processing, and Transportation and Storage. The Gathering and Processing segment provides natural gas gathering, processing and fractionation services and crude oil gathering for its producer customers. The Transportation and Storage segment offers interstate and intrastate natural gas pipeline transportation and storage service to natural gas producers, utilities and industrial customers. Enable Midstream Partners, LP is based in Oklahoma City, Oklahoma.

Enlink Midstream LLC is independent midstream energy. The Company is involved in natural gas gathering, treating, processing, transmission, distribution, supply and marketing, and crude oil marketing. Enlink Midstream LLC, formerly known as Crosstex Energy Inc., is based in headquartered in Dallas, Texas.

EOG Resources, Inc. is one of the largest independent (non-integrated) crude oil and natural gas companies in the United States with proved reserves in the United States, Trinidad, the United Kingdom and China. EOG's strategy is to generate the best rates of return by controlling operating and capital costs while maximizing oil and natural gas reserve recoveries. EOG strives to maintain the lowest possible operating cost structure that is consistent with prudent and safe operations. The company focuses on integrating technology such as 3D seismic, core analysis, and microseismic to develop proprietary petro-physical models. In order to find and develop low-cost reserves, EOG prioritizes exploration and drilling of internally generated prospects. This strategy is intended to consistently deliver cost-effective oil and natural gas production that maximizes cash flow and earnings, allowing the company to deliver long-term shareholder value while maintaining a strong balance sheet.

Enterprise Products Partners L.P. is a leading integrated provider of processing and transportation services to producers of Natural Gas Liquids (NGLs) and consumers of NGL products. The Company fractionates for a processing fee mixed NGLs produced as by-products of oil and natural gas production into their component products: ethane, propane, isobutane, normal butane and natural gasoline; converts normal butane to isobutane through the process of isomerization; produces MTBE from isobutane and methanol; and transports NGL products to end users by pipeline and railcar.

EQT Corporation, formerly Equitable Resources, Inc., is an integrated energy company engaged on Appalachian area natural gas activities, including production, gathering and processing, and distribution, transmission, storage and marketing. EQT Corporation, its divisions and its subsidiaries, offer energy products and services to wholesale and retail customers through two business segments: Equitable Supply and Equitable Utilities. The Equitable Supply segment develops, produces, and sells natural gas, crude oil, and natural gas liquids. It also gathers gas produced by the company and third parties, as well as engages in the processing of natural gas liquids. The Equitable Utilities segment engages in the gathering, transportation, storage, distribution, and sale of natural gas, as well as in the pipeline and storage operations. The company is headquartered in Pittsburgh, Pennsylvania.

Energy Transfer LP owns and operates diversified portfolios of energy assets primarily in the United States. The company is a publicly traded limited partnership with core operations which include complementary natural gas midstream, intrastate and interstate transportation and storage assets; crude oil, natural gas liquids and refined product transportation and terminalling assets; NGL fractionation and various acquisition and marketing assets. Energy Transfer LP, formerly known as Energy Transfer Equity L.P., is based in Dallas, United States.

Equitrans Midstream Corporation owns, operates, acquires and develops midstream assets primarily in the Appalachian Basin. It manages natural gas transmission, storage and gathering systems, as well as high-and low-pressure gathering lines. Equitrans Midstream Corporation is based in Pittsburgh, United States.

Diamondback Energy, Inc. is an oil and natural gas company focused on the acquisition, development, exploration and exploitation of unconventional, onshore oil and natural gas reserves in the Permian Basin in West Texas. The Company's activities are primarily focused on the Clearfork, Spraberry, Wolfcamp, Cline, Strawn and Atoka formations. Diamondback Energy, Inc. is headquartered in Midland, Texas.

TechnipFMC plc provides oilfield services. It offers subsea, surface, onshore and offshore solutions for oil and gas projects. TechnipFMC plc, formerly known as FMC Technologies Inc., is headquartered in London, United Kingdom.

GeoPark Ltd is an explorer, operator and consolidator of oil and gas. The company operates primarily in Chile, Colombia, Brazil and Argentina. GeoPark Ltd is based in Hamilton, Bermuda.

Halliburton is one of the world's largest providers of products and services to the energy industry. The company serves the upstream oil and gas industry throughout the lifecycle of the reservoir - from locating hydrocarbons and managing geological data, to drilling and formation evaluation, well construction and completion, and optimizing production through the life of the field. The company operates under two main segments: Completion and Production, and Drilling and Evaluation.

New York-based Hess Corporation, previously known as Amerada Hess Corporation, is a global exploration and production company that develops, produces, purchases, transports and sells crude oil and natural gas. The company's E&P activities are concentrated in Algeria, Australia, Azerbaijan, Brazil, Denmark, Egypt, Equatorial Guinea, Gabon, Ghana, Indonesia, Libya, Malaysia, Norway, Russia, Thailand, the United Kingdom and the United States. As of year-end 2014, Hess' proved reserves tally stood at 1.43 billion oil-equivalent barrels. In 2013, Hess sold its gas stations and exited the refining business to operate as a pure play E&P.

Helmerich & Payne, Inc. is a contract drilling company headquartered in Tulsa, Oklahoma, and engaged primarily in the drilling of oil and gas wells for exploration and production companies. The Company stands as one of the primary land and offshore platform drilling contractors in the world and is an industry leader in innovation, a fact most notably demonstrated by its FlexRig technology. H&P is a global enterprise with land operations across the United States, offshore operations in the Gulf of Mexico, and international operations in South America, the Middle East and Africa.

Kinder Morgan, Inc. is engaged in energy transportation and storage in North America. The Company handles energy products like natural gas, refined petroleum products, crude oil, ethanol, coal and carbon dioxide (CO2). The Company operates: natural gas pipelines in the Rocky Mountains, the Midwest and Texas; refined petroleum products pipeline in North America; terminals for the storage of petroleum products and chemicals and CO2 pipelines and oil producing fields. Kinder Morgan, Inc. is headquartered in Houston, Texas.

Linde plc. is an industrial gas and engineering company. Linde plc., formerly known as Praxair Inc., is based in Guildford, UK.

Cheniere Energy, Inc. is a Houston-based energy company primarily engaged in liquefied natural gas related businesses. The company owns and operates the Sabine Pass liquefied natural gas terminal in Louisiana through its 57.9% ownership interest in and management agreements with Cheniere Energy Partners, L.P. (Ticker: CQP), which is a publicly traded partnership that the company created in 2007. The Sabine Pass LNG terminal is located on the Sabine Pass deep water shipping channel less than four miles from the Gulf Coast.

Magnolia Oil & Gas Corporation is an oil producer. The company's assets are located primarily in the Eagle Ford Shale and Austin Chalk formations in South Texas. Magnolia Oil & Gas Corporation, formerly known as TPG Pace Energy Holdings, is based in Houston, Texas.

Marathon Petroleum Corporation is engaged in refining, transporting, and marketing of petroleum products. Marathon Petroleum Corporation is headquartered in Findlay, Ohio.

MPLX LP is a fee-based limited partnership formed to own, operate, develop and acquire crude oil, refined product and other hydrocarbon-based product pipelines and other midstream assets. The Company's assets consist of a network of common carrier crude oil and product pipeline systems and associated storage assets in the Midwest and Gulf Coast regions of the United States. MPLX LP is based in Findlay, Ohio.

Marathon Oil Corporation is a leading exploration and production company with extensive operations across four core regions - Africa, Middle East, Europe and North America. As of year-end 2014, Marathon had approximately 2.2 billion oil-equivalent barrels (BBOE) in proved reserves (80% liquids and 67% developed). The company's business is organized into three segments - North America Exploration and Production, International Exploration and Production, and Oil Sands Mining. In July 2011, Marathon completed the spin-off of its refining/sales business into a separate, independent and publicly traded company Marathon Petroleum Corporation (Ticker: MPC).

Matador Resources Company is an energy company engaged in the exploration, development and acquisition of oil and natural gas resources in the United States. It focuses on oil and natural gas shale plays and other unconventional resource plays. Matador has operations primarily in Texas and Louisiana. The Company has acreage positions in west Texas, New Mexico, Wyoming, Utah and Idaho. Matador Resources Company is headquartered in Dallas, Texas.

Murphy Oil Corporation is an independent exploration and production company with a strong, oil-weighted portfolio of global offshore and onshore assets with upside to our exploration program. Murphy Oil Corporation global offshore operations are balanced by a predictable North America onshore business. Exploration activities are focused in four main regions: Deepwater Gulf of Mexico, the Atlantic Margin, Southeast Asia and Australia.

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Noble Energy, Inc. is an independent oil and natural gas exploration and production company with a diversified high-quality portfolio of both U.S. unconventional and global offshore conventional assets spanning three continents. Noble Energy is a leading production company with a high-quality portfolio of crude oil and natural gas assets. It has an excellent portfolio of high-quality crude oil and natural gas assets. Its global operations are strategically focused on delivering value from the liquids-rich U.S. onshore assets and high-margin natural gas assets offshore Eastern Mediterranean. Noble Energy operates primarily in the Rocky Mountains, Mid-continent, and deep-water Gulf of Mexico areas in the US, with key international operations offshore Israel, the North Sea and West Africa.

Nabors Industries Ltd. owns and operates one of the world's largest onshore drilling rig fleets. Nabors is also a leading provider of automated drilling equipment, advanced downhole tools, performance drilling software and other innovative oilfield technologies. Leveraging their drilling automation and analytics capabilities, Nabors' highly skilled workforce continues to set new standards for operational excellence as they change the way wells are drilled in the world's most significant oil and gas markets.

New Fortress Energy LLC operates as an integrated gas-to-power company. It develops, finances and constructs energy infrastructure assets. New Fortress Energy LLC is based in New York, United States.

National Oilwell Varco, Inc. is a leading provider of technology, equipment, and services to the global oil and gas industry that supports customers' full-field drilling, completion, and production needs. The Company's machinery and equipment include drawworks, mud pumps and power swivels, which are the major mechanical components of rigs used to drill oil and gas wells. Many of these components are designed specifically for applications in offshore, extended reach and deep land drilling. National Oilwell Varco, Inc. has pioneered innovations that improve the cost-effectiveness, efficiency, safety, and environmental impact of oil and gas operations. National Oilwell Varco, Inc. powers the industry that powers the world.

Oasis Petroleum Inc. is an independent exploration and production company focused on the acquisition and development of oil and natural gas resources. The Company is currently focused on exploiting resource potential from the Bakken and Three Forks formations, which are present across a substantial majority of its acreage. Oasis Petroleum Inc. is based in Houston, Texas.

Occidental Petroleum Corporation is an international oil and gas exploration and production company with operations in the United States, Middle East and Latin America. Occidental is one of the largest U.S. oil and gas companies, based on equity market capitalization. Occidental's midstream and marketing segment gathers, processes, transports, stores, purchases and markets hydrocarbons and other commodities. Occidental's wholly owned subsidiary, OxyChem, is a major North American chemical manufacturer. Occidental is committed to respecting the environment, operating safely and upholding high standards of social responsibility throughout the company's worldwide operations. Occidental strategy relies on increasing production through developing conventional and unconventional fields. Occidental is a worldwide leader in applying advanced technology to boost production from mature oil and natural gas fields and access hard-to-recover reserves.

Plains All American Pipeline, L.P. is engaged in interstate and intrastate marketing, transportation and terminalling of crude oil.

Plains GP Holdings, L.P. operates as a holding company. The Company, through its subsidiaries, is involved in the transportation, storage, terminalling, and marketing of crude oil and refined products. It also focuses on the processing, transportation, fractionation, storage, and marketing of natural gas liquids, including ethane and natural gasoline products, as well as propane and butane products. Plains GP Holdings, L.P. is based in Houston, Texas.

PBF Energy Inc. operates as a petroleum refiner and supplier. The Company offers unbranded transportation fuels, heating oil, petrochemical feedstocks, lubricants and other petroleum products in the United States. Its refineries are located in Toledo, Ohio, Delaware City, Delaware and Paulsboro, New Jersey. The company sells its products in the northeast and Midwest United States, as well as in other regions of the United States and Canada. PBF Energy Inc. is based in Parsippany, New Jersey.

PBF Logistics LP engages in owning, leasing, operating, developing and acquiring crude oil and refined petroleum products terminals, pipelines, storage facilities and similar logistics assets. PBF Logistics LP is headquartered in Parsippany, New Jersey.

PDC Energy, Inc. is engaged in acquiring, developing and exploring crude oil, NGLs and natural gas. It has operations primarily in the Western and Eastern regions of the United States. Its Western Operating Region is primarily focused on development in the Wattenberg Field in Colorado. Its Eastern Operating Region is focused on development activity in the liquid-rich portion of the Utica Shale play in Ohio. The Company is also focused on development drilling programs in resource plays. PDC Energy, Inc., formerly known as Petroleum Development Corporation, is based in Denver, Colorado.

Parsley Energy, Inc. is an independent oil and natural gas company. It is focused on the acquisition, development, and exploitation of unconventional oil and natural gas reserves in the Permian Basin. Parsley Energy, Inc. is headquartered in Midland, Texas.

Phillips 66 is a downstream energy company. It operates in three segments: Refining & Marketing, Midstream and Chemicals. The Refining and Marketing segment purchases, refines, markets and transports crude oil and petroleum products, mainly in the United States, Europe and Asia and also engages in power generation activities, lubricants and other specialty products businesses. The Midstream segment gathers, processes, transports and markets natural gas and fractionates and markets NGL, predominantly in the United States. The Chemicals segment manufactures and markets petrochemicals and plastics. Phillips 66 is headquartered in Houston, Texas.

Patterson-UTI Energy, Inc. is an oil drilling company and it provides drilling services to oil and natural gas exploration and production companies in the United States and Canada. Its subsidiaries provide onshore contract drilling services to exploration and production companies in North America, pressure pumping services to exploration and production companies in the United States and pipe handling components and related technology to drilling contractors around the world. Patterson-UTI Drilling Company LLC and its subsidiaries operate land-based drilling rigs in oil and natural gas producing regions of the continental United States and western Canada. Universal Pressure Pumping, Inc. and Universal Well Services. The company comprises three segments: Contract Drilling, Pressure Pumping, and Oil and Natural Gas.

PETROCHINA ADR is engaged in a broad range of petroleum-related activities, including: the exploration, development and production of crude oil and natural gas; refining, transportation, storage and marketing, including import and export, of crude oil and petroleum products; production and sale of chemical products; and the transmission, marketing and sale of natural gas.

ProPetro Holding Corp. provides oilfield services. It offers hydraulic fracturing and other complementary services to leading upstream oil and gas companies engaged in the exploration and production of North American unconventional oil and natural gas resources. ProPetro Holding Corp. is headquartered in Midland, Texas.

QEP Resources is a leading independent natural gas and oil exploration and production company. The Company's operations are focused in the Rocky Mountain and Midcontinent regions of the United States. The Company also gathers, compresses, treats, and processes natural gas. QEP Resources, Inc. is based in Denver, Colorado.

Royal Dutch Petroleum Company owns 60% of the Royal Dutch/Shell Group of companies. These companies are involved in all phases of the petroleum industry from exploration to final processing and delivery. Royal Dutch Petroleum Company has not operations of its own, and virtually the whole of its income is derived from its 60% interest.

Royal Dutch Shell plc is the result of the unification of Royal Dutch and Shell Transport.

RPC, Inc. provides a broad range of specialized oilfield services and equipment primarily to independent and major oilfield companies engaged in the exploration, production and development of oil and gas properties. It operates its business through two business segments- Technical Services and Support Services. Services and products offered by the Company include Cudd Pumping, Coiled Tubing, Snubbing, Nitrogen Units, Thru Tubing Solutions, Wireline, Fluid Pumps, Well Control, Production Rental Tools, Patterson Rental Tools, Patterson Tubular Services and Well Control School. The Company's products and services can be found throughout the United States, including the Gulf of Mexico, mid-continent, southwest, Appalachian and Rocky Mountain regions, and in selected international markets. RPC, Inc. is headquartered in Atlanta, Georgia.

Transocean LTD., formerly Transocean Inc., is an international provider of offshore contract drilling services for oil and gas wells. The company offers deepwater and harsh environment drilling, oil and gas drilling management, and drilling engineering and project management services, as well as explores, develops, and produces oil and gas resources. The company is based in Houston, Texas.

Range Resources Corporation is a leading U.S. independent oil and natural gas producer with operations focused in stacked-pay projects in the Appalachia Basin and Northern Louisiana. Range Resources Corporation's strategy to achieve business objective is to increase reserves and production through internally generated drilling projects coupled with occasional complementary acquisitions and divestitures of non-core assets. The Company pursues an organic growth strategy targeting high return, low-cost projects within its large inventory of low risk development drilling opportunities. Through its wholly owned subsidiary, Independent Producer Finance, the company also provides financing to small oil and gas producers by purchasing term overriding royalty interests in their properties.

Seadrill Limited provides offshore drilling services. Its operating segment consists of Floaters, Jack-up Rigs and Other. Floaters segment offers drilling, completion and maintenance services for offshore exploration and production wells. Jack-up Rigs segment provides drilling, completion and maintenance services for offshore exploration and production wells. Other segment offers management services to third parties and related parties. Seadrill Limited is headquartered in Hamilton, Bermuda.

Shell Midstream Partners, L.P. engages in owning, operating, developing and acquiring pipelines and other midstream assets. Its initial assets consist of interests in entities that own crude oil and refined products pipelines serving as key infrastructure to transport growing onshore and offshore crude oil production to Gulf Coast refining markets and to deliver refined products from those markets to major demand centers. Shell Midstream Partners, L.P. is based in Houston, Texas.

Schlumberger Limited is the world's leading provider of technology for reservoir characterization, drilling, production, and processing to the oil and gas industry. Schlumberger supplies the industry's most comprehensive range of products and services, from exploration through production and integrated pore-to-pipeline solutions for hydrocarbon recovery that optimize reservoir performance. Schlumberger manages its business through 35 GeoMarket regions, which are grouped into four geographic areas: North America, Latin America, Europe & Africa, Russia, Middle East and Asia. The GeoMarket structure offers customers a single point of contact at the local level for field operations and brings together geographically focused teams to meet local needs and deliver customized solutions. Schlumberger operates in many varied and often challenging geographical environments. Schlumberger maintained to the highest standards of the health and safety of their employees, customers and contractors.

SM Energy Company, formerly known as St. Mary Land & Exploration Company, is an independent energy company engaged in the exploration, exploitation, development, acquisition, and production of natural gas and crude oil. The Company operates in the areas: Mid-Continent, Rocky Mountains, ArkLaTex, Permian Basin, and Gulf Coast regions which are operated out of its offices in Tulsa, Oklahoma; Billings, Montana; Shreveport, Louisiana; Midland, Texas; and Houston, Texas, respectively. SM Energy Company is based in Denver, Colorado.

Suburban Propane Partners, L.P., a publicly traded Delaware limited partnership is engaged, through subsidiaries, in the retail and wholesale marketing of propane and related appliances and services. ThePartnership believes it is the third largest retail marketer of propane in the United States, Suburban Propane Partners serves active residential, commercial, industrial and agricultural customers from customer service centers in over 40 states. The Partnership's operations are concentrated in the east and west coast regions of the United States.

Sunoco LP is a master limited partnership that distributes motor fuel to approximately 10,000 convenience stores, independent dealers, commercial customers and distributors located in more than 30 states. SUN's general partner is owned by Energy Transfer Operating, L.P., a wholly owned subsidiary of Energy Transfer LP.

Southwestern Energy Company is an independent energy company whose wholly-owned subsidiaries are engaged in natural gas and oil exploration, development and production, natural gas gathering and marketing.

Total Fina SA engages in worldwide oil and gas production, other upstream, RM&T and an expanding multi-national specialty chemicals business. The Company's Chemical Division produces rubber, paint, ink, adhesives and resins.

Targa Resources Corp owns general and limited partner interests in Targa Resources Partners LP, engaged in providing midstream natural gas and natural gas liquid services in the United States. The Company operates its business through two business segments: Natural Gas Gathering and Processing and NGL Logistics and Marketing. The Natural Gas Gathering and Processing segment includes assets used in the gathering of natural gas produced from oil and gas wells and processing this raw natural gas into merchantable natural gas by extracting natural gas liquids and removing impurities. NGL Logistics and Marketing segment is engaged in gathering and storing; fractionating, storing, and transporting of finished NGLs. Targa also markets the natural gas liquids produced and purchased in selected United States markets. The Company also offers refinery services and wholesale propane marketing operations. Targa Resources Corp is headquartered in Houston, Texas.

Ultrapar Participacoes S.A., a major Brazilian industrial group, is one of the largest distributors of liquefied petroleum gas in Brazil and a leading producer of petrochemicals and chemical. Ultrapar is also engaged in the storage and transportation of liquefied petroleum gas and petrochemical and chemical products. (PRESS RELEASE)

Valero Energy Corporation, through its subsidiaries, is an international manufacturer and marketer of transportation fuels and other petrochemical products. Valero, a Fortune 50 company based in San Antonio, Texas, is an independent petroleum refiner and ethanol producer, and its assets include 15 petroleum refineries with a combined throughput capacity of approximately 3.1 million barrels per day and 11 ethanol plants with a combined production capacity of 1.4 billion gallons per year. The petroleum refineries are located in the United States (U.S.), Canada and the United Kingdom (U.K.), and the ethanol plants are located in the Mid-Continent region of the U.S. In addition, Valero owns the 2 percent general partner interest and a majority limited partner interest in Valero Energy Partners LP, a midstream master limited partnership. Valero sells its products in both the wholesale rack and bulk markets, and approximately 7,400 outlets carry Valero's brand names in the U.S., Canada, the U.K. and Ireland.

Viper Energy Partners LP is engaged in owning, acquiring and exploiting oil and natural gas properties primarily in North America. It focuses on developing mineral interests in the Permian Basin in West Texas. Viper Energy Partners LP is based in Midland, Texas.

Western Gas Equity Partners, LP is formed to own, operate, acquire and develop midstream energy assets. Western Gas Equity Partners, LP is based in The Woodlands, Texas.

Cactus, Inc. designs, manufactures, sells and rents highly-engineered wellheads and pressure control equipment. Its products sold and rented principally for onshore unconventional oil and gas wells and are utilized during the drilling, completion and production phases of its customers' wells. In addition, it provides field services for all its products and rental items to assist with the installation, maintenance and handling of the wellhead and pressure control equipment. The company operates primarily in the Permian, SCOOP/STACK, Marcellus, Utica, Eagle Ford and Bakken. Cactus, Inc. is based in HOUSTON.

The Williams Companies, Inc. is a premier provider of large-scale infrastructure connecting U.S. natural gas and natural gas products to growing demand for cleaner fuel and feedstocks. The Williams Companies, Inc. is an industry-leading, large-cap master limited partnership with operations across the natural gas value chain from gathering, processing and interstate transportation of natural gas and natural gas liquids to petchem production of ethylene, propylene and other olefins. With major positions in top U.S. supply basins, miles of pipelines system wide - including the nation's largest volume and fastest growing pipeline - providing natural gas for clean-power generation, heating and industrial use. Williams Partners' operations touch approximately 30 percent of U.S. natural gas.

WPX Energy, Inc. is a natural gas and oil company focused on the exploitation and development of unconventional properties. The Company has oil and gas properties particularly in the Piceance Basin, Bakken Shale and Marcellus Shale. WPX Energy, Inc. is based in Tulsa, Oklahoma.

Cimarex Energy is an independent oil and gas exploration and production company focused on increasing shareholder value through strategies linked to generating attractive economic returns on capital employed and profitable growth in per-share reserves, production, and cash flow. They intend to profitably grow reserves and production through a balanced mix of exploration, exploitation and acquisitions. They have a diversified base of high-quality production along with attractive drilling opportunities.

Exxon Mobil Corporation is the largest publicly traded international energy company, uses technology and innovation to help meet the world's growing energy needs. Its principal business is energy, involving exploration for, and production of, crude oil and natural gas, manufacturing of petroleum products and transportation and sale of crude oil and natural gas, natural gas and petroleum products. Exxon Mobil is a major manufacturer and marketer of basic petrochemicals, including olefins, aromatics, polyethylene and polypropylene plastics and a wide variety of specialty products. Exxon Mobil is engaged in exploration for, and mining and sale of coal, copper and other minerals. ExxonMobil holds an industry leading inventory of resources, is one of the largest refiners and marketers of petroleum products and its chemical company is one of the largest in the world.

YPF Sociedad Anonima is an international energy company, based on the integrated business of hydrocarbons, focalized in Latin America, with high standards of efficiency, profitability and responsibility. They have a dominant position in Argentina's exploration, production, refining and marketing sectors, as well as a growing presence in petrochemicals.