NBR nabors industries ltd. NYSE Oil & Gas Production NE noble corporation plc ordinary shares NYSE Oil & Gas Production NGL ngl energy partners lp common units representing limited partner interests NYSE Oil Refining/Marketing NGS natural gas services group, inc. NYSE Oilfield Services/Equipment NOA north american construction group ltd. common shares (no par) NYSE Oilfield Services/Equipment 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 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 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 ads NYSE Oil & Gas Production PBT permian basin royalty trust NYSE Oil & Gas Production PDS precision drilling corporation NYSE Oil & Gas Production PHG koninklijke philips n.v. ny registry shares NYSE Consumer Electronics/Appliances PHX phx minerals inc. NYSE Oil & Gas Production PSX phillips 66 NYSE Integrated oil Companies RES rpc, inc. NYSE Oilfield Services/Equipment RIG transocean ltd (switzerland) NYSE Oil & Gas Production RRC range resources corporation NYSE Oil & Gas Production SBR sabine royalty trust NYSE Oil & Gas Production SD sandridge energy, inc. NYSE Oil & Gas Production SDRL seadrill limited common shares NYSE Oil & Gas Production SEMG semgroup NYSE Oilfield Services/Equipment SJT san juan basin royalty trust NYSE Oil & Gas Production SLB slb limited common shares NYSE Oilfield Services/Equipment SM sm energy company NYSE Oil & Gas Production SN sharkninja, inc. ordinary shares NYSE Oil & Gas Production 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 THR thermon group holdings, inc. NYSE Industrial Machinery/Components TPL texas pacific land corporation NYSE Oil & Gas Production TTI tetra technologies, inc. NYSE Oil & Gas Production VET vermilion energy inc. common (canada) NYSE Oil & Gas Production VLO valero energy corporation NYSE Integrated oil Companies VOC voc energy trust units of beneficial interest NYSE Oil & Gas Production WRD weride inc. - american depositary shares NYSE Oil & Gas Production WTI w&t offshore, inc. NYSE Oil & Gas Production WTTR select energy services, inc. class a NYSE Oilfield Services/Equipment XOM exxon mobil corporation NYSE Integrated oil Companies YPF ypf sociedad anonima NYSE Integrated oil Companies