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APA (APA Corporation) COG (Cabot Oil & Gas Corporation) COP (ConocoPhillips)

CVX (Chevron Corporation) CXO (Concho Resources Inc.) DVN (Devon Energy Corporation)

EOG (EOG Resources, Inc.) FANG (Diamondback Energy, Inc.) FTI (TechnipFMC plc)

HAL (Halliburton Company) HES (Hess Corporation) HFC (HollyFrontier Corporation)

KMI (Kinder Morgan, Inc.) MPC (Marathon Petroleum Corporation) MRO (Marathon Oil Corporation)

NOV (NOV Inc.) OKE (ONEOK, Inc.) OXY (Occidental Petroleum Corporation)

PSX (Phillips 66) PXD (Pioneer Natural Resources Company) SLB (Schlumberger Limited)

VLO (Valero Energy Corporation) WMB (The Williams Companies, Inc.) XOM (Exxon Mobil Corporation)

BKR (Baker Hughes Company)