TPL texas pacific land corporation NYSE Oil & Gas Production TTI tetra technologies, inc. NYSE Oil & Gas Production USEG u.s. energy corp. NASDAQ Oil & Gas Production VET vermilion energy inc. common (canada) NYSE Oil & Gas Production VNOM viper energy, inc. - class a NASDAQ Oil & Gas Production 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 DKL delek logistics partners, l.p. common units representing limited partner interests NYSE Natural Gas Distribution ENB enbridge inc NYSE Natural Gas Distribution MPLX mplx lp common units representing limited partner interests NYSE Natural Gas Distribution NS nustar energy l.p. common units NYSE Natural Gas Distribution 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 DNOW dnow inc. NYSE Metal Fabrications DRQ dril-quip, inc. NYSE Metal Fabrications FET forum energy technologies, inc. NYSE Metal Fabrications FTI technipfmc plc ordinary share NYSE Metal Fabrications NOV nov inc. NYSE Metal Fabrications NR newpark resources, inc. NYSE Metal Fabrications OIS oil states international, inc. NYSE Metal Fabrications PFIE profire energy, inc. NASDAQ Metal Fabrications SDPI superior drilling products, inc. AMEX Metal Fabrications SOI solaris oilfield infrastructure, inc. class a NYSE Metal Fabrications BP bp p.l.c. NYSE Integrated oil Companies BPT bp prudhoe bay royalty trust NYSE Integrated oil Companies CLMT calumet, inc NASDAQ Integrated oil Companies COP conocophillips NYSE Integrated oil Companies CVI cvr energy inc. NYSE Integrated oil Companies CVX chevron corporation NYSE Integrated oil Companies DK delek us holdings, inc. NYSE Integrated oil Companies HES hess corporation NYSE Integrated oil Companies IMO imperial oil limited AMEX Integrated oil Companies MPC marathon petroleum corporation NYSE Integrated oil Companies PBF pbf energy inc. class a NYSE Integrated oil Companies PSX phillips 66 NYSE Integrated oil Companies SU suncor energy inc. NYSE Integrated oil Companies VLO valero energy corporation NYSE Integrated oil Companies VTNR vertex energy, inc NASDAQ Integrated oil Companies XOM exxon mobil corporation NYSE Integrated oil Companies YPF ypf sociedad anonima NYSE Integrated oil Companies BC brunswick corporation NYSE Industrial Machinery/Components BLDP ballard power systems, inc. - common shares NASDAQ Industrial Machinery/Components BWXT bwx technologies, inc. NYSE Industrial Machinery/Components CMI cummins inc. NYSE Industrial Machinery/Components CYD china yuchai international limited NYSE Industrial Machinery/Components HOLI hollysys automation technologies, ltd. NASDAQ Industrial Machinery/Components IPWR ideal power inc. NASDAQ Industrial Machinery/Components PLUG plug power, inc. NASDAQ Industrial Machinery/Components THR thermon group holdings, inc. NYSE Industrial Machinery/Components