Exploration & Production - An E&P company is known to be in a specific sector within the oil and gas industry. Companies involved in the high-risk/high-reward area of exploration and production focus on finding, augmenting, producing and merchandising different types of oil and gas.

Pioneer Natural Resources - $PXD
Anadarko Petroleum Corporation - $APC
Apache Corporation - $APC
Chesapeake Energy Corporation - $CHK
ConocoPhillips - $COP
Continental Resources - $CLR
Devon Energy - $DVN
EOG Resources - EOG
Hess Corporation - HES
Laredo Petroleum - $LPI
Linn Energy - $LINE
Marathon Oil - MPC
Murphy Oil - $MUR
Occidental Petroleum - $OXY
Plains Exploration & Production - $PAA
SandRidge Energy - $SN
Vaalco Energy - $EGY