INFU infusystems holdings, inc. AMEX Medical/Dental Instruments INO inovio pharmaceuticals, inc. AMEX Medical/Dental Instruments NSPR inspiremd inc. AMEX Medical/Dental Instruments RVP retractable technologies, inc. AMEX Medical/Dental Instruments SDPI superior drilling products, inc. AMEX Metal Fabrications UAMY united states antimony corporation AMEX Metal Fabrications AIRI air industries group AMEX Military/Government/Technical CVU cpi aerostructures, inc. AMEX Military/Government/Technical LEU centrus energy corp. class a AMEX Mining & Quarrying of Nonmetallic Minerals (No Fuels) SND smart sand, inc. AMEX Mining & Quarrying of Nonmetallic Minerals (No Fuels) UUUU energy fuels inc ordinary shares (canada) AMEX Mining & Quarrying of Nonmetallic Minerals (No Fuels) AMC amc entertainment holdings, inc. class a AMEX Movies/Entertainment NTIP network-1 technologies, inc. AMEX Multi-Sector Companies VHC virnetx holding corp AMEX Multi-Sector Companies XELB xcel brands, inc AMEX Multi-Sector Companies BRN barnwell industries, inc. AMEX Oil & Gas Production BSM black stone minerals, l.p. common units representing limited partner interests AMEX Oil & Gas Production CKX ckx lands, inc. AMEX Oil & Gas Production CRC california resources corporation AMEX Oil & Gas Production EPM evolution petroleum corporation, inc. AMEX Oil & Gas Production GBR new concept energy, inc AMEX Oil & Gas Production GTE gran tierra energy inc. AMEX Oil & Gas Production HUSA houston american energy corporation AMEX Oil & Gas Production MXC mexco energy corporation AMEX Oil & Gas Production NOG northern oil and gas, inc. AMEX Oil & Gas Production PARR par pacific holdings, inc. AMEX Oil & Gas Production PED pedevco corp. AMEX Oil & Gas Production REI ring energy, inc. AMEX Oil & Gas Production SNMP evolve transition infrastructure lp common units representing class b limited liability company interests AMEX Oil & Gas Production AE adams resources & energy, inc. AMEX Oil Refining/Marketing CYRX cryoport, inc. AMEX Oil Refining/Marketing RLGT radiant logistics, inc. AMEX Oil Refining/Marketing CQP cheniere energy partners, lp common units AMEX Oil/Gas Transmission LNG cheniere energy, inc. AMEX Oil/Gas Transmission ENSV enservco corp AMEX Oilfield Services/Equipment ASPU aspen group inc. AMEX Other Consumer Services EVI evi industries, inc. AMEX Other Consumer Services GHC graham holdings company AMEX Other Consumer Services CMT core molding technologies inc AMEX Plastic Products AAU almaden minerals, ltd. common shares AMEX Precious Metals ASM avino silver & gold mines ltd. common shares (canada) AMEX Precious Metals AUMN golden minerals company AMEX Precious Metals BTG b2gold corp common shares (canada) AMEX Precious Metals CMCL caledonia mining corporation plc common shares AMEX Precious Metals DNN denison mines corp ordinary shares (canada) AMEX Precious Metals EMX emx royalty corporation common shares (canada) AMEX Precious Metals GORO gold resource corporation AMEX Precious Metals LODE comstock inc. AMEX Precious Metals NAK northern dynasty minerals, ltd. AMEX Precious Metals NG novagold resources inc. AMEX Precious Metals