Advantage Oil & Gas Ltd. [AAV]
Approach Resources Inc. [AREX]
Arena Resources, Inc. [ARD]
Aspen Group Resources Corporation [ASRPF.PK]
Atlas Energy Resources, LLC [ATN]
Atlas Energy, Inc. [ATLS]
Atlas Pipeline Holdings, L.P. [AHD]
Atwood Oceanics, Inc. [ATW]
Aurora Oil & Gas Corporation [AOGSQ.PK]
Austral Pacific Energy Ltd. [AUSPF.PK]
Avalon Oil & Gas, Inc. [AOGN.OB]
Avenue Group, Inc. [AVNU.PK]

BG Group plc [BRGYY.PK]
Big Sky Energy Corporation [BSKO.PK]
Bill Barrett Corporation [BBG]
BPZ Resources, Inc. [BPZ]
BreitBurn Energy Partners L.P. [BBEP]
Bronco Drilling Company, Inc. [BRNC]

Caddo International, Inc. [CADD]
Canadian Oil Sands Trust [COSWF.PK]
Canadian Superior Energy Inc. [SNG]
Cano Petroleum, Inc. [CFW]
Cheniere Energy, Inc. [LNG]
CityView Corporation Limited [CTVWF.OB]
CNX Gas Corporation [CXG]
Compton Petroleum Corporation [CMZ]
Concho Resources Inc. [CXO]
Constellation Energy Partners LLC [CEP]
Continental Resources, Inc. [CLR]
Curlew Lake Resources Inc. [CWLXF.PK]

Deep Well Oil & Gas, Inc. [DWOG.PK]
Derek Oil & Gas Corporation [DRKOF.PK]
Diamond Offshore Drilling, Inc. [DO]
Dune Energy, Inc. [DNE]

Ecopetrol S.A. [EC]
Eden Energy Corp. [EDNE.OB]
Edge Petroleum Corporation [EPEXQ.PK]
Encore Energy Partners LP [ENP]
Enerplus Resources Fund [ERF]
ENSCO International Incorporated [ESV]
Enterra Energy Trust [ENT]
EV Energy Partners, L.P. [EVEP]

FX Energy, Inc. [FXEN]

Gastar Exploration Ltd. [GST]
GeoGlobal Resources Inc. [GGR]
GeoMet, Inc. [GMET]
Glen Rose Petroleum Corporation [GLRP]
Gulf Island Fabrication, Inc. [GIFI]

Heartland Oil and Gas Corp. [HTOG.PK]
Helmerich & Payne, Inc. [HP]
Hercules Offshore, Inc. [HERO]
Hiland Holdings GP, LP [HPGP]
Hiland Partners, LP [HLND]
Hyperdynamics Corporation [HDY]

Infinity Energy Resources, Inc. [IFNY.PK]
Ivanhoe Energy Inc. [IVAN]

Jacobs Financial Group, Inc. [JFGI.OB]
JED Oil Inc. [JDO]

Key Energy Services, Inc. [KEG]
Kodiak Oil & Gas Corp. [KOG]

Legacy Reserves LP [LGCY]
LiteWave Corp. [LTWV.PK]

Mahalo Energy Ltd. [MHLQF.PK]
Manas Petroleum Corporation [MNAP.OB]
Mariner Energy, Inc. [ME]
MarkWest Energy Partners, L.P. [MWE]
Marubeni Corporation [MARUY.PK]
Maverick Minerals Corporation [MVRM.OB]
Miller Petroleum, Inc. [MILL.OB]
MV Oil Trust [MVO]

Nabors Industries Ltd. [NBR]
NATCO Group Inc. [NTG]
New Concept Energy, Inc. [GBR]
Nexen Inc. [NXY]
NGAS Resources, Inc. [NGAS]
Noble Corporation [NE]

Parker Drilling Company [PKD]
Patterson-UTI Energy, Inc. [PTEN]
Pavilion Energy Resources, Inc. [PVRE.PK]
Pengrowth Energy Trust [PGH]
Penn West Energy Trust [PWE]
Petroleum Geo-Services ASA [PGSVY.PK]
Petsec Energy Ltd [PSJEY.PK]
Pinnacle Gas Resources, Inc. [PINN]
Pioneer Drilling Company [PDC]
Pioneer Southwest Energy Partners L.P. [PSE]
Portrush Petroleum Corporation [PRRPF.OB]
Pride International, Inc. [PDE]
Providence Resources, Inc. [PVRS.OB]

Quest Energy Partners, L.P. [QELP]
Quest Resource Corporation [QRCP]
Quicksilver Gas Services LP [KGS]

Rex Energy Corporation [REXX]
Rock Energy Resources, Inc. [RCKE.PK]
Rowan Companies, Inc. [RDC]

Samson Oil and Gas Limited [SSN]
SandRidge Energy, Inc. [SD]
Santos Ltd [STOSF.PK]
Seahawk Drilling, Inc. [HAWK]
South Texas Oil Company [STXXQ.PK]
Standard Energy Corporation [STDE.PK]
Statoil ASA [STO]
Storm Cat Energy Corporation [SCUEF.PK]
Strata Oil & Gas Inc. [SOIGF.OB]
Surge Global Energy, Inc. [SRGG.OB]

TBX Resources, Inc. [TBXC.PK]
Technip [TKPPY.PK]
Tengasco, Inc. [TGC]
Teton Energy Corporation [TEC]
Transocean Inc. [RIG]
Treaty Energy Corporation [TECO.OB]
Tri-Valley Corporation [TIV]
TXCO Resources Inc. [TXCOQ.PK]

Union Drilling, Inc. [UDRL]
Unit Corporation [UNT]

Vanguard Natural Resources, LLC [VNR]
Venoco, Inc. [VQ]

W&T Offshore, Inc. [WTI]
Whiting Petroleum Corporation [WLL]
Woodside Petroleum Ltd. [WOPEY.PK]

Yasheng Eco-Trade Corporation [YASH.OB]