HLX helix energy solutions group, inc. NYSE Oilfield Services/Equipment HAL halliburton company NYSE Oilfield Services/Equipment HNRG hallador energy company NASDAQ Coal Mining GPOR gulfport energy corporation common shares NASDAQ Oil & Gas Production GTE gran tierra energy inc. AMEX Oil & Gas Production GLP global partners lp global partners lp common units representing limited partner interests NYSE Oil Refining/Marketing GPRK geopark ltd common shares NYSE Oil & Gas Production GEL genesis energy, l.p. common units NYSE Oil Refining/Marketing GE ge aerospace NYSE Consumer Electronics/Appliances FET forum energy technologies, inc. NYSE Metal Fabrications FI fiserv, inc. NYSE Oilfield Services/Equipment XOM exxon mobil corporation NYSE Integrated oil Companies SNMP evolve transition infrastructure lp common units representing class b limited liability company interests AMEX Oil & Gas Production EPM evolution petroleum corporation, inc. AMEX Oil & Gas Production EQT eqt corporation NYSE Oil & Gas Production EOG eog resources, inc. NYSE Oil & Gas Production ENSV enservco corp AMEX Oilfield Services/Equipment E eni s.p.a. NYSE Oil & Gas Production ERF enerplus corporation NYSE Oil & Gas Production ENB enbridge inc NYSE Natural Gas Distribution EMR emerson electric company NYSE Consumer Electronics/Appliances EC ecopetrol s.a. american depositary shares NYSE Oil & Gas Production DRQ dril-quip, inc. NYSE Metal Fabrications DMLP dorchester minerals, l.p. - common units representing limited partnership interests NASDAQ Oil & Gas Production DNOW dnow inc. NYSE Metal Fabrications FANG diamondback energy, inc. NASDAQ Oil & Gas Production DO diamond offshore drilling, inc. NYSE Oil & Gas Production DVN devon energy corporation NYSE Oil & Gas Production DK delek us holdings, inc. NYSE Integrated oil Companies DKL delek logistics partners, l.p. common units representing limited partner interests NYSE Natural Gas Distribution DWSN dawson geophysical company NASDAQ Oil & Gas Production CVI cvr energy inc. NYSE Integrated oil Companies CMI cummins inc. NYSE Industrial Machinery/Components CCLP csi compressco lp - common units NASDAQ Oilfield Services/Equipment CAPL crossamerica partners lp common units representing limited partner interests NYSE Oil Refining/Marketing CRT cross timbers royalty trust NYSE Oil & Gas Production CPG crescent point energy corporation ordinary shares (canada) NYSE Oil & Gas Production CLB core laboratories inc. NYSE Oilfield Services/Equipment COP conocophillips NYSE Integrated oil Companies CNXC concentrix corporation NYSE Coal Mining CRK comstock resources, inc. NYSE Oil & Gas Production CNX cnx resources corporation NYSE Coal Mining CKX ckx lands, inc. AMEX Oil & Gas Production CYD china yuchai international limited NYSE Industrial Machinery/Components CVX chevron corporation NYSE Integrated oil Companies CHKR chesapeake granite watr NYSE Oil & Gas Production CHK chesapeake energy corporation NYSE Oil & Gas Production CVE cenovus energy inc NYSE Oil & Gas Production CNQ canadian natural resources limited NYSE Oil & Gas Production CEI camber energy, inc. NYSE Oil & Gas Production