ALPHABETICAL INDEX

ABB LTD
ABBOT GROUP PLC
ABU DHABI NATIONAL OIL COMPANY
ADAMS RESOURCES & ENERGY INC
AERA ENERGY LLC
AES CORPORATION (THE)
AGL RESOURCES INC
AKZO NOBEL NV
ALABAMA POWER COMPANY
ALLEGHENY ENERGY INC
ALLIANCE RESOURCE PARTNERS LP
ALLIANT ENERGY CORP
ALON USA ENERGY INC
ALSTOM
AMERADA HESS CORPORATION
AMEREN CORP
AMERENIP
AMERESCO
AMERICAN ELECTRIC POWER COMPANY INC (AEP)
AMERIGAS PARTNERS LP
ANADARKO PETROLEUM CORPORATION
AP MOLLER-MAERSK AS
APACHE CORP
APCO ARGENTINA INC
APEX OIL COMPANY INC
AQUILA INC
ARABIAN AMERICAN DEVELOPMENT CO
ARCH COAL INC
ARCTIC SLOPE REGIONAL CORP
AREVA GROUP
ARIZONA PUBLIC SERVICE COMPANY
ASHLAND INC
ATCO LTD
ATLANTIC CITY ELECTRIC COMPANY
ATMOS ENERGY CORPORATION
ATOMIC ENERGY OF CANADA LIMITED
ATWOOD OCEANICS INC
AVISTA CORPORATION
BAKER HUGHES INC
BALTIMORE GAS AND ELECTRIC COMPANY
BANGOR HYDRO-ELECTRIC COMPANY
BARNWELL INDUSTRIES INC
BASF AG
BECHTEL GROUP INC
BERGESEN DY ASA
BERRY PETROLEUM COMPANY
BG GROUP PLC
BHARAT PETROLEUM CORPORATION LTD
BJ SERVICES COMPANY
BLACK & VEATCH HOLDING COMPANY
BLACK HILLS CORPORATION
BLACK WARRIOR WIRELINE
BLUE RHINO LLC
BOOTS & COOTS INTERNATIONAL WELL CONTROL INC
BOSTON EDISON COMPANY
BP PLC
BRITISH COLUMBIA HYDRO AND POWER AUTHORITY
BRITISH ENERGY GROUP PLC
BRITISH NUCLEAR FUELS PLC
BURLINGTON RESOURCES INC
CABOT OIL & GAS CORP
CAL DIVE INTERNATIONAL
CALLON PETROLEUM COMPANY
CALPINE CORPORATION
CALTEX AUSTRALIA LIMITED
CAMAC HOLDINGS INC
CANADIAN NATURAL RESOURCES
CANADIAN OIL SANDS TRUST
CARRIZO OIL & GAS INC
CE FRANKLIN LTD
CENTER OIL COMPANY
CENTERPOINT ENERGY INC
CENTRICA PLC
CH ENERGY GROUP INC
CHC HELICOPTER CORP
CHESAPEAKE ENERGY CORPORATION
CHEUNG KONG INFRASTRUCTURE HOLDING LTD
CHEVRON CORPORATION
CHICAGO BRIDGE & IRON COMPANY NV
CHINA NATIONAL PETROLEUM CORP
CHINA PETROLEUM & CHEMICAL
CHUBU ELECTRIC POWER CO INC
CIMAREX ENERGY CO
CINCINNATI GAS & ELECTRIC COMPANY (THE) (CG&E)
CINERGY CORPORATION
CITGO PETROLEUM CORPORATION
CLAYTON WILLIAMS ENERGY INC
CLP HOLDINGS LIMITED
CMS ENERGY CORP
CNOOC LIMITED
COGENTRIX ENERGY INC
COLONIAL GROUP INC
COMMONWEALTH EDISON COMPANY
COMPAGNIE GENERALE DE GEOPHYSIQUE SA
COMPANHIA PARANAENSE DE ENERGIA - COPEL
COMPANIA ESPANOLA DE PETROLEOS SA
CONOCOPHILLIPS
CONSOL ENERGY INC
CONSOLIDATED EDISON INC
CONSTELLATION ENERGY GROUP
CONSUMERS ENERGY COMPANY
COOPER CAMERON CORPORATION
COOPER INDUSTRIES LTD
CORNERSTONE PROPANE PARTNERS LP
CROSSTEX ENERGY LP
CROWN CENTRAL PETROLEUM LLC
DAWSON GEOPHYSICAL COMPANY
DEGUSSA AG
DELMARVA POWER AND LIGHT COMPANY
DENBURY RESOURCES INC
DETROIT EDISON COMPANY (THE)
DEVON ENERGY CORPORATION
DIAMOND OFFSHORE DRILLING INC
DOMINION RESOURCES INC
DORCHESTER MINERALS LP
DOW CHEMICAL COMPANY (THE)
DPL INC
DRIL-QUIP INC
DRUMMOND COMPANY INC
DTE ENERGY COMPANY
DUKE ENERGY CORP
DUKE ENERGY FIELD SERVICES LLC
DUKE ENERGY GAS TRANSMISSION CORPORATION
DUKE POWER COMPANY
DYNEGY INC
E I DU PONT DE NEMOURS & CO (DUPONT)
E.ON AG
E.ON UK PLC
ECHELON CORPORATION
ECOPETROL SA
EDGE PETROLEUM CORP
EDISON INTERNATIONAL
EDISON MISSION ENERGY
EDP - ENERGIAS DE PORTUGAL SA
EL PASO CORP
ELECTRABEL SA
ELECTRICITE DE FRANCE
ENBRIDGE ENERGY PARTNERS LP
ENBRIDGE INC
ENCANA CORP
ENCORE ACQUISITION CO
ENEL SPA
ENERGY EAST CORPORATION
ENERGY PARTNERS LTD
ENERGY TRANSFER PARTNERS LP
ENGLOBAL CORP
ENI SPA
ENOGEX INC
ENSCO INTERNATIONAL INC
ENSIGN ENERGY SERVICES INC
ENTERGY CORP
ENTERPRISE PRODUCTS PARTNERS LP
EOG RESOURCES INC
EPCOR UTILITIES INC
EQUITABLE RESOURCES INC
ERGON INC
ESPRIT ENERGY TRUST
EXCO RESOURCES INC
EXELON CORPORATION
EXXON MOBIL CORPORATION
FERRELLGAS PARTNERS L P
FIRSTENERGY CORPORATION
FLINT ENERGY SERVICES LTD
FLUOR CORP
FMC TECHNOLOGIES INC
FORDING CANADIAN COAL TRUST
FOREST OIL CORPORATION
FORTUM COMPANY
FPL GROUP INC
FRONTIER OIL CORPORATION
FRONTLINE LTD
GAZ DE FRANCE
GAZ METROPOLITAN AND COMPANY LP
GAZPROMNEFT (OAO)
GE CONSUMER & INDUSTRIAL SYSTEMS
GE ENERGY
GENESIS ENERGY LP
GEOKINETICS INC
GEORGIA POWER COMPANY
GETTY PETROLEUM MARKETING
GIANT INDUSTRIES INC
GLOBAL INDUSTRIES LTD
GLOBAL PARTNERS LP
GLOBALSANTA FE CORP
GOLDMAN SACHS GROUP INC
GOODRICH PETROLEUM CORP
GRANT PRIDECO INC
GREAT LAKES GAS TRANSMISSION COMPANY
GREAT PLAINS ENERGY INC
GREY WOLF INC
GS-CALTEX OIL CORP
GULF OIL LIMITED PARTNERSHIP
GULFMARK OFFSHORE INC
HALLIBURTON COMPANY
HALLIBURTON ENERGY SERVICES GROUP
HARVEST NATURAL RESOURCES INC
HAWAIIAN ELECTRIC INDUSTRIES INC
HEADWATERS INCORPORATED
HELLENIC PETROLEUM SA
HELMERICH & PAYNE INC
HINDUSTAN PETROLEUM CORP LTD
HOLLY CORPORATION
HONG KONG AND CHINA GAS CO LTD (THE)
HORIZON OFFSHORE INC
HOUSTON EXPLORATION COMPANY (THE)
HUNT CONSOLIDATED INC
HUNTING PLC
HUSKY ENERGY INC
HYDRIL COMPANY
HYDRO ONE INC
HYDRO-QUEBEC
IMPERIAL OIL LIMITED
INDIAN OIL CORP LTD
INERGY LP
INPEX CORP
ITRON INC
JILIN CHEMICAL INDUSTRIAL COMPANY LTD
JOHN WOOD GROUP PLC
KCS ENERGY INC
KERR-MCGEE CORPORATION
KEY ENERGY SERVICES INC
KEYSPAN CORPORATION
KINDER MORGAN ENERGY PARTNERS
KOCH INDUSTRIES INC
KOCHI REFINERIES LTD
KUWAIT PETROLEUM CORPORATION
LACLEDE GROUP INC (THE)
LAYNE CHRISTENSEN COMPANY
LG CHEM LTD
LG&E ENERGY LLC
LOEWS CORPORATION
LUKOIL (OAO)
LYONDELL CHEMICAL COMPANY
MAGELLAN MIDSTREAM PARTNERS LP
MAGNUM HUNTER RESOURCES INC
MANITOBA HYDRO-ELECTRIC
MARATHON OIL CORP
MARATHON PETROLEUM COMPANY LLC
MARKWEST HYDROCARBON INC
MASSEY ENERGY COMPANY
MATRIX SERVICE COMPANY
MCDERMOTT INTERNATIONAL
MCMORAN EXPLORATION CO
MDU RESOURCES GROUP INC
MERIDIAN RESOURCE CORPORATION (THE)
METRETEK TECHNOLOGIES
MICHIGAN CONSOLIDATED GAS COMPANY
MIDAMERICAN ENERGY HOLDINGS CO
MIDWEST GENERATION LLC
MIRANT CORPORATION
MITSUBISHI CHEMICAL CORPORATION
MITSUBISHI CORP
MITSUI OSK LINES LTD
MOTIVA ENTERPRISES LLC
MURPHY OIL CORPORATION
NABORS INDUSTRIES LTD
NATCO GROUP INC
NATIONAL ENERGY GROUP INC
NATIONAL FUEL GAS COMPANY
NATIONAL GRID PLC
NATIONAL GRID USA
NATIONAL OILWELL VARCO INC
NATIONAL THERMAL POWER CORP LTD
NEDERLANDSE GASUNIE NV
NEVADA POWER COMPANY
NEW JERSEY RESOURCES CORPORATION
NEW YORK STATE ELECTRIC & GAS CORP
NEWFIELD EXPLORATION CO
NEWPARK RESOURCES INC
NEXANT INC
NEXEN INC
NIAGARA MOHAWK POWER CORP
NICOR INC
NIGERIAN NATIONAL PETROLEUM CORPORATION
NIPPON MINING HOLDINGS INC
NIPPON OIL CORPORATION
NIPPON YUSEN KABUSHIKI KAISHA (NYK)
NISOURCE INC
NOBLE CORPORATION
NOBLE ENERGY INC
NORSK HYDRO ASA
NORTHEAST UTILITIES
NORTHERN BORDER PARTNERS
NORTHERN INDIANA PUBLIC SERVICE COMPANY
NORTHWESTERN CORPORATION
NOVATEK (OAO)
NRG ENERGY INC
NSTAR
OCCIDENTAL PETROLEUM CORPORATION
OCEANEERING INTERNATIONAL INC
OFFSHORE LOGISTICS INC
OGE ENERGY CORP
OIL & NATURAL GAS CORP LTD
OIL STATES INTERNATIONAL INC
OMV AKTIENGESELLSCHAFT
ONEOK INC
ONTARIO POWER GENERATION INC
OSAKA GAS CO LTD
OXBOW CORPORATION
PACIFICORP
PAKISTAN STATE OIL CO
PARKER DRILLING COMPANY
PATTERSON-UTI ENERGY INC
PDV AMERICA INC
PEABODY ENERGY CORP
PENN OCTANE CORPORATION
PENN VIRGINIA CORPORATION
PENN WEST ENERGY TRUST
PEOPLES ENERGY CORPORATION
PEPCO HOLDINGS INC
PETROBRAS ENERGIA PARTICIPACIONES SA
PETRO-CANADA
PETROCHINA COMPANY
PETROKAZAKHSTAN INC
PETROLEO BRASILEIRO SA (PETROBRAS)
PETROLEOS DE VENEZUELA SA
PETROLEOS MEXICANOS (PEMEX)
PETROLEUM DEVELOPMENT CORPORATION
PETROLEUM GEO SERVICE ASA
PETROLEUM HELICOPTERS
PETROLIAM NASIONAL BERHAD
PETRON CORP
PETROQUEST ENERGY INC
PG&E CORPORATION
PIEDMONT NATURAL GAS COMPANY INC
PINNACLE WEST CAPITAL CORPORATION
PIONEER NATURAL RESOURCES
PLAINS ALL AMERICAN PIPELINE
PLAINS EXPLORATION AND PRODUCTION COMPANY
PNM RESOURCES INC
POGO PRODUCING COMPANY
PORTLAND GENERAL ELECTRIC COMPANY
PPL CORPORATION
PRECISION DRILLING CORP
PREMCOR INC
PREMIER OIL PLC
PRIDE INTERNATIONAL INC
PRIMEENERGY CORPORATION
PROGRESS ENERGY INC
PSI ENERGY INC
PT PERTAMINA (PERSERO)
PUBLIC POWER CORP SA
PUBLIC SERVICE ENTERPRISE GROUP INCORPORATED
PUGET ENERGY INC
QATAR PETROLEUM
QUESTAR CORPORATION
QUICKSILVER RESOURCES INC
RAG AKTIENGESELLSCHAFT COMPANY
RANGE RESOURCES CORPORATION
RED APPLE GROUP INC
RELIANCE INDUSTRIES LTD
RELIANT ENERGY INC
REMINGTON OIL & GAS CORP
REPSOL YPF
RIO TINTO GROUP
ROCHESTER GAS AND ELECTRIC CORP
ROSNEFT (OAO)
ROWAN COMPANIES INC
ROYAL DUTCH SHELL (SHELL GROUP)
ROYAL VOPAK NV
RPC INC
RWE AG
RWE NPOWER
SAIPEM SPA
SAN DIEGO GAS & ELECTRIC COMPANY
SANTOS LTD
SAUDI ARAMCO (SAUDI ARABIAN OIL CO)
SCANA CORPORATION
SCHLUMBERGER LIMITED
SCHNEIDER ELECTRIC SA
SCOTTISH AND SOUTHERN ENERGY PLC
SCOTTISH POWER PLC
SEACOR HOLDINGS INC
SEITEL INC
SEMBCORP INDUSTRIES LTD
SEMPRA ENERGY
SHAW GROUP INC
SHELL CANADA LIMITED
SHELL OIL CO
SHIKOKU ELECTRIC POWER COMPANY INC
SHOWA SHELL SEKIYU KK
SHV HOLDINGS NV
SIBNEFT (OAO SIBERIAN OIL COMPANY)
SIEMENS AG
SIERRA PACIFIC RESOURCES
SINCLAIR OIL CORP
SINOPEC SHANGHAI PETROCHEMICAL
SK CORP
SMEDVIG ASA
SMITH INTERNATIONAL INC
SNAM RETE GAS SPA
SOCIETA ITALIANA PER IL GAS PA
SOLVAY SA
SONATRACH
SOUTHERN CALIFORNIA EDISON COMPANY
SOUTHERN CALIFORNIA GAS COMPANY
SOUTHERN COMPANY (THE)
SOUTHERN UNION COMPANY
SOUTHWEST GAS CORPORATION
SOUTHWESTERN ENERGY COMPANY
SPINNAKER EXPLORATION COMPANY
ST MARY LAND & EXPLORATION COMPANY
STATOIL ASA
STOLT OFFSHORE SA
STONE ENERGY CORPORATION
STRATEGIC ENERGY LLC
STREICHER MOBILE FUELING INC
SUBSEA 7 INC
SUEZ SA
SUNCOR ENERGY INC
SUNOCO INC
SUNOCO LOGISTICS PARTNERS LP
SUPERIOR ENERGY SERVICES INC
SURGUTNEFTEGAS (OJSC)
SWIFT ENERGY COMPANY
SYNCRUDE CANADA LTD
TALISMAN ENERGY INC
TAMPA ELECTRIC COMPANY
TECHNIP
TECO ENERGY INC
TEIKOKU OIL CO
TENAGA NASIONAL BERHAD (TNB)
TENASKA INC
TENNESSEE VALLEY AUTHORITY (TVA)
TEPPCO PARTNERS LP
TERASEN INC
TESCO CORPORATION
TESORO PETROLEUM CORPORATION
TETRA TECHNOLOGIES INC
TEXAS GAS TRANSMISSION LLC
TEXAS GENCO HOLDINGS
TIDEWATER INC
TNK-BP
TOHOKU ELECTRIC POWER COMPANY
TOKYO ELECTRIC POWER COMPANY INC (THE)
TOKYO GAS CO LTD
TONENGENERAL SEKIYU KK
TOTAL SA
TOTAL UK LIMITED
TRANSALTA CORP
TRANSAMMONIA INC
TRANSCANADA CORP
TRANSCANADA PIPELINES LTD
TRANSMONTAIGNE INC
TRANSOCEAN INC
TRANSPORTADORA DE GAS SA
TRICO MARINE SERVICES INC
TRUMAN ARNOLD COMPANIES
TSAKOS ENERGY NAVIGATION LTD
TXU CORPORATION
TXU ELECTRIC DELIVERY
UGI CORP
UIL HOLDINGS CORPORATION
UK COAL PLC
ULTRA PETROLEUM CORP
ULTRAPAR PARTICIPACOES SA
UNIFIED ENERGY SYSTEM RUSSIA (OAO)
UNION FENOSA SA
UNIT CORPORATION
UNITED REFINING COMPANY
UNITED UTILITIES PLC
UNOCAL CORPORATION
US OIL COMPANY INC
USEC INC
VALERO ENERGY CORPORATION
VALERO LP
VATTENFALL AB
VECTREN CORPORATION
VERITAS DGC INC
VINTAGE PETROLEUM INC
VIRGINIA ELECTRIC AND POWER COMPANY
VULCAN ENERGY
W&T OFFSHORE INC
WASHINGTON GROUP INTERNATIONAL
WEATHERFORD INTERNATIONAL INC
WESTAR ENERGY
WESTERN GAS RESOURCES INC
WESTERN OIL SANDS INC
WESTERNGECO
WESTINGHOUSE ELECTRIC COMPANY LLC
WESTMORELAND COAL COMPANY
WGL HOLDINGS INC
W-H ENERGY SERVICES INC
WILLBROS GROUP INC
WILLIAMS COMPANIES INC (THE)
WINTERSHALL AG
WISCONSIN ENERGY CORPORATION
WOODSIDE PETROLEUM LTD
WORLD FUEL SERVICES CORP
WPS RESOURCES CORPORATION
XANSER CORP
XCEL ENERGY INC
XSTRATA PLC
XTO ENERGY INC
YANZHOU COAL MINING CO LTD
YPF SA
YUKOS (OAO NK)