1) Chevron (CVX)- Chevron Corporation (Chevron) manages its investments in subsidiaries and affiliates, and provides administrative, financial, management and technology support to United States and international subsidiaries that engage in fully integrated petroleum operations, chemicals operations, mining operations, power generation and energy services.
2) Exxon Mobil Corporation (XOM)- Exxon Mobil Corporation (Exxon Mobil) is a manufacturer and marketer of commodity petrochemicals, including olefins, aromatics, polyethylene and polypropylene plastics and a range of specialty products. It also has interests in electric power generation facilities. The Company has several divisions and hundreds of affiliates with names that include ExxonMobil, Exxon, Esso or Mobil. Divisions and affiliated companies of ExxonMobil operate or market products in the United States and other countries of the world.
3) Ecopetrol S.A. (EC)- Ecopetrol S.A. (Ecopetrol) is a vertically integrated oil company operating in Colombia and overseas. The Company divides its operations into four business segments: exploration and production, transportation, refining, and marketing and supply. In February 2009, the Company, in partnership with Korea National Oil Corporation (KNOC), acquired a 100% stake (50% for each participating company) in Offshore International Group Inc. (OIG). In May 2009, Ecopetrol completed the acquisition of all shares held by Glencore in Reficar S.A.
4) BP p.l.c. (BP)- BP p.l.c. (BP) is an international oil and gas company. The Company operates in more than 80 countries, providing its customers with fuel for transportation, energy for heat and light, retail services and petrochemicals products. The Company operates two segments: Exploration and Production, and Refining and Marketing. Exploration and Production's activities cover three key areas. Upstream activities include oil and natural gas exploration, field development and production.
5) Devon Energy Corporation (DVN) – Devon Energy Corporation (Devon), together with its subsidiaries, is an independent energy company engaged primarily in exploration, development and production of natural gas and oil. The Company's oil and gas operations are concentrated in various North American onshore areas in the United States and Canada. It has offshore operations that are situated principally in the Gulf of Mexico and regions located offshore Azerbaijan, Brazil and China.
6) Occidental Petroleum (OXY)- Occidental Petroleum Corporation (Occidental) conducts its operations, through various oil and gas, chemical, midstream, marketing and other subsidiaries, and affiliates. The Company operates in three business segments: oil and gas segment, chemical segment, and midstream, marketing and other segment. The oil and gas segment explores for, develops, produces and markets crude oil, natural gas liquids (NGLs), condensate, as well as natural gas.
7) Chesapeake Energy Corporation (CHK) - Chesapeake Energy Corporation is the second-largest producer of natural gas and the most active driller of new wells in the U.S. Headquartered in Oklahoma City, the company's operations are focused on discovering and developing unconventional natural gas and oil fields onshore in the U.S.
8) EQT Corporation (EQT)- EQT Corporation (EQT), formerly Equitable Resources, Inc., conducts its business, through three business segments: EQT Production, EQT Midstream and Distribution. The Company is a natural gas producer in the Appalachian Basin with 4.1 trillion cubic feet of proved reserves across 3.4 million acres as of December 31, 2009. EQT offers energy products, including natural gas, natural gas liquids (NGLs) and crude oil, and services to wholesale and retail customers in the United States.
9) Cenovus Energy Inc (CVE)- Cenovus Energy Inc. (Cenovus) is an integrated oil company. The Companys operations include enhanced oil recovery (EOR) properties and established crude oil and natural gas production in Alberta and Saskatchewan. It also has ownership interests in two refineries in Illinois and Texas, United States. The Company operates in two operating divisions: Integrated Oil and Canadian Plains. Integrated Oil Division includes all the assets within the upstream and downstream integrated oil business with its joint venture partner, as well as bitumen interests and the Athabasca natural gas assets.
10) Western Refining, Inc. (WNR) - Western Refining, Inc. (WNR) an independent crude oil refiner and marketer of refined products and also operates service stations and convenience stores. The Company owns and operates three refineries with a total crude oil throughput capacity of approximately 221,000 barrels per day (bpd). In addition to its 128,000 bpd refinery in El Paso, Texas, the Company also owns and operates a 70,000 bpd refinery on the East Coast of the United States near Yorktown, Virginia and a refinery near Gallup, New Mexico with a throughput capacity of 23,000 bpd.
11) EnCana Corporation (ECA) - EnCana Corporation (EnCana) is a natural gas company. The Company operates in two operating divisions: Canadian Division, formerly the Canadian Foothills Division, which includes natural gas development and production assets located in British Columbia and Alberta, and the Deep Panuke natural gas project offshore Nova Scotia and USA Division, which includes the natural gas development and production assets located in the United States.
12) Schlumberger (SLB)- Schlumberger Limited (Schlumberger) is a supplier of technology, integrated project management and information solutions to customers working in the oil and gas industry. The Company operates in two business segments: Schlumberger Oilfield Services and WesternGeco.
13) Cabot Oil & Gas Corporation (COG) - Cabot Oil & Gas Corporation is an independent oil and gas company engaged in the development, exploitation and exploration of oil and gas properties located in North America. During the year ended December 31, 2009, the Company restructured its operations by combining its Rocky Mountain and Appalachian areas to form the North Region and combining the Anadarko Basin with its Texas and Louisiana areas to form the South Region.
14) Halliburton (HAL)- Halliburton Company provides a variety of services and products to customers in the energy industry related to the exploration, development, and production of oil and natural gas. The Company serves oil and natural gas companies throughout the world and operates under two segments: the Completion and Production segment, and the Drilling and Evaluation segment.
15) TOTAL S.A. (TOT)- TOTAL S.A. (TOTAL), together with its subsidiaries and affiliates worldwide, is an integrated international oil and gas company. With operations in more than 130 countries, TOTAL engages in all aspects of the petroleum industry, including Upstream operations (oil and gas exploration, development and production, liquefied natural gas (LNG)) and Downstream operations (refining, marketing and the trading and shipping of crude oil and petroleum products).
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| Advantage Oil & Gas Ltd. (AAV) | Alon USA Energy, Inc. (ALJ) |
| Anadarko Petroleum Corporation (APC) | Apache Corp. (APA) |
| Approach Resources, Inc. (AREX) | Atlas Energy, Inc. (ATLS) |
| Atlas Energy Resources LLC (ATN) | Atlas Pipeline Partners LP (APL) |
| Atwood Oceanics, Inc. (ATW) | Baker Hughes Incorporated (BHI) |
| Bill Barrett Corp. (BBG) | BMB Munai Inc. (KAZ) |
| BPZ Resources, Inc. (BPZ) | BP plc (BP) |
| Breitburn Energy Partners LP (BBEP) | Cabot Oil & Gas Corporation (COG) |
| Brigham Exploration Co. (BEXP) | CAMAC Energy Inc. (CAK) |
| Bronco Drilling Co. Inc. (BRNC) | Cameron International Corporation (CAM) |
| Cano Petroleum, Inc. (CFW) | Carrizo Oil & Gas Inc. (CRZO) |
| Cenovus Energy Inc. (CVE) | CNOOC Ltd. (CEO) |
| Cheniere Energy, Inc. (LNG) | Chevron Corporation (CVX) |
| China North East Petroleum Holdings Limited (NEP) | China Integrated Energy, Inc. (CBEH) |
| Cimarex Energy Co. (XEC) | Core Laboratories NV (CLB) |
| Continental Resources Inc. (CLR) | Cobalt International Energy, Inc. (CIE) |
| Chesapeake Energy Corporation (CHK) | Comstock Resources Inc. (CRK) |
| Constellation Energy Partners LLC (CEP) | Concho Resources, Inc. (CXO) |
| Cheniere Energy Partners LP. (CQP) | ConocoPhillips (COP) |
| EOG Resources, Inc. (EOG) | Crimson Exploration Inc. (CXPO) |
| Devon Energy Corporation (DVN) | Crosstex Energy Inc. (XTXI) |
| Dril-Quip, Inc. (DRQ) | Dawson Geophysical Co. (DWSN) |
| Diamond Offshore Drilling Inc. (DO) | Dejour Enterprises, Ltd. (DEJ) |
| Eagle Rock Energy Partners, L.P. (EROC) | Denbury Resources Inc. (DNR) |
| Equal Energy Ltd. (EQU) | Enbridge Inc. (ENB) |
| El Paso Corp. (EP) | Energy XXI Limited (EXXI) |
| Hyperdynamics Corporation (HDY) | Imperial Oil Ltd. (IMO) |
| Hess Corporation (HES) | Halliburton Company (HAL) |
| Hercules Offshore, Inc. (HERO) | Gasco Energy Inc. (GSX) |
| Helix Energy Solutions Group, Inc. (HLX) | Gran Tierra Energy Inc. (GTE) |
| Helmerich & Payne Inc. (HP) | GMX Resources Inc. (GMXR) |
| Goodrich Petroleum Corp. (GDP) | GeoResources, Inc. (GEOI) |
| Geomet, Inc. (GMET) | GeoGlobal Resources Inc. (GGR) |
| Gastar Exploration, Ltd. (GST) | FX Energy Inc. (FXEN) |
| Frontier Oil Corp. (FTO) | Forest Oil Corp. (FST) |
| Flotek Industries Inc. (FTK) | EXCO Resources Inc. (XCO) |
| Legacy Reserves Lp (LGCY) | InterOil Corporation (IOC) |
| Kinder Morgan Management LLC (KMR) | Noble Corp. (NE) |
| NGAS Resources Inc. (NGAS) | Newpark Resources Inc. (NR) |
| National Oilwell Varco, Inc. (NOV) | Newfield Exploration Co. (NFX) |
| Nexen Inc. (NXY) | Nabors Industries Ltd. (NBR) |
| MDU Resources Group Inc. (MDU) | Murphy Oil Corporation (MUR) |
| McMoRan Exploration Co. (MMR) | Miller Petroleum Inc. (MILL) |
| Marathon Oil Corporation (MRO) | MarkWest Energy Partners LP (MWE) |
| Magellan Petroleum Corporation (MPET) | Magnum Hunter Resources Corp. (MHR) |
| Noble Energy, Inc. (NBL) | Linn Energy, LLC (LINE) |
| Statoil ASA (STO) | Sinopec Shanghai Petrochemical Co. Ltd. (SHI) |
| Spectra Energy Corp. (SE) | Seahawk Drilling, Inc. (HAWK) |
| Southwestern Energy Co. (SWN) | SeaDrill Limited (SDRL) |
| Sonde Resources Corp. (SOQ) | Royale Energy Inc. (ROYL) |
| SM Energy Company (SM) | Schlumberger Limited (SLB) |
| Range Resources Corporation (RRC) | SandRidge Energy, Inc. (SD) |
| Rosetta Resources, Inc. (ROSE) | Unit Corp. (UNT) |
| Rex Energy Corporation (REXX) | Union Drilling, Inc. (UDRL) |
| Northern Oil and Gas, Inc. (NOG) | RAM Energy Resources, Inc. (RAME) |
| Oil States International Inc. (OIS) | Questar Corporation (STR) |
| QEP Resources, Inc. (QEP) | Pride International Inc. (PDE) |
| Plains Exploration & Production Company (PXP) | Precision Drilling Corporation (PDS) |
| Pioneer Natural Resources Co. (PXD) | Pioneer Drilling Co. (PDC) |
| Penn Virginia Corp. (PVA) | Petroleum Development Corporation (PETD) |
| Petroleo Brasileiro (PBR) | Patterson-UTI Energy Inc. (PTEN) |
| Petrohawk Energy Corporation (HK) | Parker Drilling Co. (PKD) |
| Oceaneering International, Inc. (OII) | Occidental Petroleum Corporation (OXY) |
| Oasis Petroleum Inc. (OAS) | Newpark Resources Inc. (NR) |
| Stone Energy Corp. (SGY) | Newfield Exploration Co. (NFX) |
| Transocean Ltd. (RIG) | Tri-Valley Corp. (TIV) |
| TransGlobe Energy Corp. (TGA) | Toreador Resources Corp. (TRGL) |
| TransAtlantic Petroleum Ltd. (TAT) | Talisman Energy Inc. (TLM) |
| Tesoro Corporation (TSO) | Tesco Corporation (TESO) |
| Tengasco Inc. (TGC) | Swift Energy Co. (SFY) |
| Superior Energy Services Inc. (SPN) | Sulphco Inc. (SUF) |
| Ultra Petroleum Corp. (UPL) | Williams Companies, Inc. (WMB) |
| Whiting Petroleum Corp. (WLL) | W&T Offshore Inc. (WTI) |
| Western Refining Inc. (WNR) | Warren Resources Inc. (WRES) |
| Weatherford International Ltd. (WFT) | Voyager Oil & Gas, Inc. (VYOG.OB) |
| Venoco, Inc. (VQ) | Vantage Drilling Company (VTG) |
| Valero Energy Corp. (VLO) | US Energy Corp. (USEG) |
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