ACU acme united corporation. AMEX Industrial Machinery/Components AEMD aethlon medical, inc. AMEX Biotechnology: Laboratory Analytical Instruments AIRI air industries group AMEX Military/Government/Technical CIX compx international inc. AMEX Industrial Machinery/Components CVU cpi aerostructures, inc. AMEX Military/Government/Technical EKSO ekso bionics holdings, inc. AMEX Industrial Machinery/Components ESP espey mfg. & electronics corp. AMEX Industrial Machinery/Components FRD friedman industries inc. AMEX Steel/Iron Ore GRC gorman-rupp company (the) AMEX Fluid Controls KIQ kelso technologies inc ordinary shares AMEX Railroads LGL lgl group, inc. (the) AMEX Industrial Machinery/Components RUN sunrun inc. AMEX Industrial Specialties SIF sifco industries, inc. AMEX Aerospace SVT servotronics, inc. AMEX Industrial Machinery/Components UAMY united states antimony corporation AMEX Metal Fabrications WKHS workhorse group, inc. AMEX Auto Manufacturing AAON aaon, inc. NASDAQ Industrial Machinery/Components AEHR aehr test systems NASDAQ Electrical Products AEIS advanced energy industries, inc. NASDAQ Industrial Machinery/Components APOG apogee enterprises, inc. NASDAQ Auto Parts:O.E.M. ARTW art's-way manufacturing co., inc. NASDAQ Industrial Machinery/Components ASTC astrotech corporation NASDAQ Military/Government/Technical ASTE astec industries, inc. NASDAQ Construction/Ag Equipment/Trucks ATRO astronics corporation NASDAQ Military/Government/Technical AVAV aerovironment, inc. NASDAQ Aerospace AVHI achari ventures hldgs crp NASDAQ Homebuilding AXDX accelerate diagnostics, inc. NASDAQ Biotechnology: Laboratory Analytical Instruments BELFA bel fuse inc. - class a NASDAQ Electrical Products BELFB bel fuse inc. - class b NASDAQ Electrical Products BLBD blue bird corporation NASDAQ Construction/Ag Equipment/Trucks BOOM dmc global inc. NASDAQ Industrial Specialties BRKR bruker corporation NASDAQ Biotechnology: Laboratory Analytical Instruments BWEN broadwind, inc. NASDAQ Metal Fabrications CAAS china automotive systems, inc. NASDAQ Auto Parts:O.E.M. CAMT camtek ltd. - ordinary shares NASDAQ Electronic Components CDTI cdti advanced materials NASDAQ Pollution Control Equipment CETX cemtrex inc. NASDAQ Industrial Machinery/Components CGNX cognex corporation NASDAQ Industrial Machinery/Components CHCI comstock holding companies, inc. - class a NASDAQ Homebuilding CLIR clearsign technologies corporation NASDAQ Industrial Machinery/Components CMCO columbus mckinnon corporation NASDAQ Construction/Ag Equipment/Trucks CODA coda octopus group, inc. - common stock NASDAQ Industrial Machinery/Components COHR coherent corp. NASDAQ Biotechnology: Laboratory Analytical Instruments COHU cohu, inc. NASDAQ Electrical Products CPSH cps technologies corp. NASDAQ Building Materials CSTE caesarstone ltd. - ordinary shares NASDAQ Building Materials CVGI commercial vehicle group, inc. NASDAQ Auto Parts:O.E.M. DAIO data i/o corporation NASDAQ Electrical Products DORM dorman products, inc. NASDAQ Auto Parts:O.E.M. DXPE dxp enterprises, inc. NASDAQ Industrial Machinery/Components