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Mining & Quarrying Of Nonmetallic Minerals (No Fuels)

Vulcan Materials CO MARTIN MARIETTA MATERIALS INC TECK RESOURCES LTD CHEMICAL & MINING CO OF CHILE INC MDU RESOURCES GROUP INC Summit Materials, Inc. HECLA MINING CO/DE/ COMPASS MINERALS INTERNATIONAL INC ENERGY FUELS INC Standard Metals Processing, Inc. Piedmont Lithium Inc. CENTRUS ENERGY CORP UNITED STATES LIME & MINERALS INC U.S. SILICA HOLDINGS, INC. Largo Inc. Intrepid Potash, Inc. Ciner Resources LP Galiano Gold Inc. Gold Standard Ventures Corp. Smart Sand, Inc. BROOKMOUNT EXPLORATIONS INC Galleon Gold Corp. Brazil Minerals, Inc. NAMI Corp. STARCORE INTERNATIONAL MINES LTD. Premier Product Group, Inc. COMMANDER RESOURCES LTD iMine Corp Applied Minerals, Inc. Kibush Capital Corp LKA GOLD Inc /DE/ Covia Holdings Corp TECK RESOURCES LTD HECLA MINING CO/DE/ TGS International Ltd. Hi-Crush Inc. Covia Holdings Corp Piedmont Lithium Inc.