NOV nov inc. NYSE Metal Fabrications NR newpark resources, inc. NYSE Metal Fabrications NRP natural resource partners lp limited partnership NYSE Coal Mining NRT north european oil royality trust NYSE Oil & Gas Production NS nustar energy l.p. common units NYSE Natural Gas Distribution OBE obsidian energy ltd. NYSE Oil & Gas Production OII oceaneering international, inc. NYSE Oilfield Services/Equipment OIS oil states international, inc. NYSE Metal Fabrications OXY occidental petroleum corporation NYSE Oil & Gas Production PAA plains all american pipeline, l.p. - common units representing limited partner interests NYSE Natural Gas Distribution PAGP plains gp holdings, l.p. - class a shares representing limited partner interests NYSE Natural Gas Distribution PARR par pacific holdings, inc. AMEX Oil & Gas Production PBA pembina pipeline corp. ordinary shares (canada) NYSE Oil & Gas Production PBF pbf energy inc. class a NYSE Integrated oil Companies PBR petroleo brasileiro s.a.- petrobras NYSE Oil & Gas Production PBT permian basin royalty trust NYSE Oil & Gas Production PDS precision drilling corporation NYSE Oil & Gas Production PED pedevco corp. AMEX Oil & Gas Production PFIE profire energy, inc. NASDAQ Metal Fabrications PHG koninklijke philips n.v. ny registry shares NYSE Consumer Electronics/Appliances PHX phx minerals inc. NYSE Oil & Gas Production PLUG plug power, inc. NASDAQ Industrial Machinery/Components PNRG primeenergy resources corporation NASDAQ Oil & Gas Production PSX phillips 66 NYSE Integrated oil Companies PTEN patterson-uti energy, inc. NASDAQ Oil & Gas Production PUMP propetro holding corp. NASDAQ Oilfield Services/Equipment PXD pioneer natural resources company NYSE Oil & Gas Production RCON recon technology, ltd. - class a ordinary shares NASDAQ Oilfield Services/Equipment REI ring energy, inc. AMEX Oil & Gas Production RES rpc, inc. NYSE Oilfield Services/Equipment RIG transocean ltd (switzerland) NYSE Oil & Gas Production RRC range resources corporation NYSE Oil & Gas Production SBOW silverbow resorces, inc. NYSE Oil & Gas Production SBR sabine royalty trust NYSE Oil & Gas Production SD sandridge energy, inc. NYSE Oil & Gas Production SDPI superior drilling products, inc. AMEX Metal Fabrications SDRL seadrill limited common shares NYSE Oil & Gas Production SJT san juan basin royalty trust NYSE Oil & Gas Production SLB schlumberger n.v. NYSE Oilfield Services/Equipment SM sm energy company NYSE Oil & Gas Production SN sharkninja, inc. ordinary shares NYSE Oil & Gas Production SNMP evolve transition infrastructure lp common units representing class b limited liability company interests AMEX Oil & Gas Production SOI solaris oilfield infrastructure, inc. class a NYSE Metal Fabrications SSL sasol ltd. american depositary shares NYSE Oil & Gas Production SU suncor energy inc. NYSE Integrated oil Companies SUN sunoco lp common units representing limited partner interests NYSE Oil Refining/Marketing SWN southwestern energy company NYSE Oil & Gas Production TELL tellurian inc. NASDAQ Oil & Gas Production THR thermon group holdings, inc. NYSE Industrial Machinery/Components TPIC tpi composites, inc. NASDAQ Industrial Machinery/Components