| Carrizo Oil & Gas, Inc. |
CRZO |
| Kestrel Energy, Inc. |
KEST |
| Tipperary Corporation |
TPY |
| Delta Petroleum Corporation |
DPTR |
| Dynamic Oil & Gas, Inc. |
DYOLF |
| Wiser Oil Company |
WZR |
| Parallel Petroleum Corporation |
PLLL |
| Energy Partners, Ltd. |
EPL |
| Mallon Resources Corporation |
MLRC |
| Panhandle Royalty Company |
PANRA |
| Contango Oil & Gas Company |
MCF |
| Edge Petroleum Corporation |
EPEX |
| North Coast Energy, Inc. |
NCEB |
| Dorchester Hugoton, Ltd. |
DHULZ |
| Greka Energy Corporation |
GRKA |
| PYR Energy Corporation |
PYR |
| Canada Southern Petroleum Ltd. |
CSPLF |
| Petroleum Development Corporation |
PETD |
| Prima Energy Corporation |
PENG |
| Vintage Petroleum, Inc. |
VPI |
| CNOOC Limited |
CEO |
| Encore Acquisition Company |
EAC |
| Apco Argentina Inc. |
APAGF |
| ATP Oil & Gas Corporation |
ATPG |
| Barnwell Industries, Inc. |
BRN |
| Blue Dolphin Energy Company |
BDCO |
| Carbon Energy Corporation |
CRB |
| Double Eagle Petroleum Co. |
DBLE |
| GeoResources, Inc. |
GEOI |
| GMX Resources Inc. |
GMXR |
| Isramco, Inc. |
ISRL |
| PANACO, Inc. |
PNO |
| PrimeEnergy Corporation |
PNRG |
| Range Resources Corporation |
RRC |
| Royale Energy, Inc. |
ROYL |
| Penn Virginia Corporation |
PVA |
| China Petroleum & Chemical Corporation |
SNP |
| Chesapeake Energy Corporation |
CHK |
| EXCO Resources, Inc. |
EXCO |
| St. Mary Land & Exploration Company |
MARY |
| PetroCorp Incorporated |
PEX |
| EEX Corporation |
EEX |
| Syntroleum Corporation |
SYNM |
| Ultra Petroleum Corporation |
UPL |
| Tengasco, Inc. |
TGC |
| Westport Resources Corporation |
WRC |
| MarkWest Energy Partners, L.P. |
MWE |
| Cabot Oil & Gas Corporation |
COG |
| Enterra Energy Corp. |
EENC |
| AmeriGas Partners, L.P. |
APU |
| Key Production Company, Inc. |
KP |
| Callon Petroleum Company |
CPE |
| Toreador Resources Corporation |
TRGL |
| Berry Petroleum Company |
BRY |
| YPF, S.A. |
YPF |
| Dominion Resources Black Warrior Trust |
DOM |
| Exploration Company of Delaware, Inc. |
TXCO |
| TransMontaigne Inc. |
TMG |
| Enterprise Products Partners L.P. |
EPD |
| Remington Oil and Gas Corporation |
REM |
| Tom Brown, Inc. |
TBI |
| Burlington Resources Inc. |
BR |
| Canadian 88 Energy Corp. |
EEE |
| Plains Resources Inc. |
PLX |
| Newfield Exploration Company |
NFX |
| Stone Energy Corporation |
SGY |
| Noble Energy, Inc. |
NBL |
| Occidental Petroleum Corporation |
OXY |
| Santos Ltd |
STOSY |
| Den norske stats oljeselskap a.s. |
STO |
| Devon Energy Corporation |
DVN |
| EOG Resources, Inc. |
EOG |
| McMoRan Exploration Co. |
MMR |
| Houston Exploration Company |
THX |
| Spinnaker Exploration Company |
SKE |
| Swift Energy Company |
SFY |
| Evergreen Resources, Inc. |
EVG |
| Harvest Natural Resources, Inc. |
HNR |
| Talisman Energy Inc. |
TLM |
| Kerr-McGee Corporation |
KMG |
| Nexen Inc. |
NXY |
| Pogo Producing Company |
PPP |
| Wilshire Oil Company of Texas |
WOC |
| Clayton Williams Energy, Inc. |
CWEI |
| Forest Oil Corporation |
FST |
| CREDO Petroleum Corporation |
CRED |
| Sasol Limited |
SASOY |
| ELPASO ENERGY PART |
EPN |
| Magellan Petroleum Corporation |
MPET |
| XTO Energy Inc. |
XTO |
| Apache Corporation |
APA |
| EnCana Corporation |
ECA |
| Anadarko Petroleum Corporation |
APC |
| Miller Exploration Company |
MEXP |
| Patina Oil & Gas Corporation |
POG |
| Quicksilver Resources Inc. |
KWK |
| Torch Energy Royalty Trust |
TRU |
| Ocean Energy, Inc. |
OEI |
| Pioneer Natural Resources Company |
PXD |
| Goodrich Petroleum Corporation |
GDP |
| Nuevo Energy Company |
NEV |
| Meridian Resource Corporation |
TMR |
| Dynegy Inc. |
DYN |
| Comstock Resources, Inc. |
CRK |
| Equity Oil Company |
EQTY |
| Abraxas Petroleum Corporation |
ABP |
| Denbury Resources Inc. |
DNR |
| Mission Resources Corporation |
MSSN |
| Beta Oil & Gas, Inc. |
BETA |
| NuWay Energy Inc. - Common Stock |
NWAY |
| Southern Pacific Petroleum N.L. |
SPPTY |
