COMPANIES IN THIS INDUSTRY

ABHD – ABTECH HOLDINGS, INC.
ACO – AMCOL INTERNATIONAL CORP
ADMG – ADAMANT DRI PROCESSING & MINERALS GROUP
AGA1 – U S AGGREGATES INC
AL1 – ALCAN INC
AMZG – AMERICAN EAGLE ENERGY CORP
APQCF – ASIA PACIFIC RESOURCES LTD (Foreign)
AR1 – ASARCO INC
AUG – Auryn Resources Inc.
AUMN – Golden Minerals Company
AVLNF – AVALON ADVANCED MATERIALS INC. (Foreign)
AZK – AURIZON MINES LTD (Foreign)
BFGC – BULLFROG GOLD CORP.
BHP – BHP Billiton Limited
BMTNF – BATTLE MOUNTAIN GOLD INC. (Foreign)
BVN – Buenaventura Mining Company Inc.
CCJ – Cameco Corporation
CCRE – CAN CAL RESOURCES LTD
CHBT – CHINA-BIOTICS, INC
CHNR – China Natural Resources, Inc.
CINR – Ciner Resources LP
CLF – Cleveland-Cliffs Inc.
CLG1 – CUMBERLAND RESOURCES LTD (Foreign)
CMP – Compass Minerals International, Inc.
CSHZ – CHINA SHEN ZHOU MINING & RESOURCES, INC.
CUP – PERU COPPER INC. (Foreign)
CVIA – COVIA HOLDINGS CORP
CYM – CYPRUS AMAX MINERALS CO
CZM – CALMAT CO
DDC – DOMINION DIAMOND CORP (Foreign)
DNN – Denison Mine Corp
DRV1 – DRAVO CORP
DVXE – DEVX ENERGY INC
DYNR – DYNARESOURCE INC
ECPN – EL CAPITAN PRECIOUS METALS INC
EGI – Entree Resources Ltd.
EMES – Emerge Energy Services LP
EMU – ENERGY METALS CORP (Foreign)
EMX – EMX Royalty Corporation
EZM2 – EUROZINC MINING CORP (Foreign)
FAL – FALCONBRIDGE LTD (Foreign)
FCIN – FLOUR CITY INTERNATIONAL INC
FRG – FRONTEER GOLD INC (Foreign)
FSC – FREEPORT MCMORAN SULPHUR INC
GBGLF – GREAT BASIN GOLD LTD (Foreign)
GGTHF – GOLDEN GOLIATH RESOURCES LTD (Foreign)
GMO – General Moly, Inc
GQMNF – GOLDEN QUEEN MINING CO LTD
GSM – Ferroglobe PLC
GSM1 – GLOBE SPECIALTY METALS INC
HAN – HANSON PLC (Foreign)
HCLP – Hi-Crush Partners LP
HIIT – HII TECHNOLOGIES, INC.
HNDI – HANDENI GOLD INC.
HSC – Harsco Corporation
IDAH – IDAHO NORTH RESOURCES CORP.
INCLF – INCO LTD
KBXRF – KIMBER RESOURCES INC. (Foreign)
KLDX – Klondex Mines Ltd.
LAC – Lithium Americas Corp.
LBYE – LIBERTY ENERGY CORP.
LEU – Centrus Energy Corp.
LTHM – LIVENT CORP.
LUNMF – LUNDIN MINING CORP (Foreign)
MAGE – MAGELLAN GOLD CORP
MCP – MOLYCORP, INC.
MFN – MINEFINDERS CORP LTD. (Foreign)
MGN – MINES MANAGEMENT INC
MPVD – Mountain Province Diamonds Inc.
MRDDF – MIRANDA GOLD CORP (Foreign)
MTRN – Materion Corporation
MUX – McEwen Mining Inc.
NAK – Northern Dynasty Minerals, Ltd.
NEXA – Nexa Resources S.A.
NIOBF – NIOCORP DEVELOPMENTS LTD
NRDS – NORD RESOURCES CORP
NSU – Nevsun Resources Ltd
NTO – NORTHERN ORION RESOURCES INC (Foreign)
NXE – Nexgen Energy Ltd.
OBQI – OILSANDS QUEST INC
OGLEQ – OGLEBAY NORTON CO
PALDF – NORTH AMERICAN PALLADIUM LTD (Foreign)
PBM – PACIFIC BOOKER MINERALS INC. (Foreign)
PD – PHELPS DODGE CORP
PFRMF – PACIFIC RIM MINING CORP (Foreign)
PLG – Platinum Group Metals Ltd.
PLL – PIEDMONT LITHIUM LTD (Foreign)
PLM – Polymet Mining Corp.
PNRL – PARINGA RESOURCES LTD (Foreign)
PVG – PRETIUM RESOURCES INC. (Foreign)
PZG – Paramount Gold Nevada Corp.
PZG1 – PARAMOUNT GOLD & SILVER CORP.
QEE – QUEENSTAKE RESOURCES LTD (Foreign)
QRM – QUEST RARE MINERALS LTD. (Foreign)
RBY – RUBICON MINERALS CORP (Foreign)
RGLOF – REGALITO COPPER CORP (Foreign)
RIC – RICHMONT MINES INC (Foreign)
RIO – Rio Tinto Plc
ROGP – ROYALE GLOBE HOLDING INC.
RYMM – ROYAL MINES & MINERALS CORP
SCYYF – SCANDIUM INTERNATIONAL MINING CORP.
SFEG – SANTA FE GOLD CORP
SHGDF – SHORE GOLD INC (Foreign)
SLCA – U.S. Silica Holdings, Inc.
SMTS – Sierra Metals Inc.
SND – Smart Sand, Inc.
SRCH – SEARCHLIGHT MINERALS CORP.
SRGZ – STAR GOLD CORP.
SSC1 – SUNSHINE MINING & REFINING CO
SVBL – SILVER BULL RESOURCES, INC.
SWC – STILLWATER MINING CO
TAS – TASMAN METALS LTD. (Foreign)
TCPTF – THOMPSON CREEK METALS CO INC.
TECK – Teck Resources Ltd
TGB – Taseko Mines Limited
TMQ – Trilogy Metals Inc.
TPCS – TECHPRECISION CORP
UAMY – United States Antimony Corporation
UEC – Uranium Energy Corp.
URG – Ur Energy Inc
URZ – URANERZ ENERGY CORP.
USPR – U S PRECIOUS METALS INC
UUUU – Energy Fuels Inc
VALE – VALE S.A.
VEDL – Vedanta Limited
VROT – VITROTECH CORP
WCYN – WEST CANYON ENERGY CORP.
WHT – WHEATON RIVER MINERALS LTD (Foreign)
WMTM – WHITE MOUNTAIN TITANIUM CORP
WOLV – WOLVERINE TECHNOLOGIES CORP.
WRN – Western Copper and Gold Corporation
WSCRF – NORTH AMERICAN NICKEL INC. (Foreign)
WTZ – WESTERN SILVER CORP (Foreign)
WWR – Westwater Resources, Inc.
XPL – Solitario Zinc Corp.
XRA – EXETER RESOURCE CORP (Foreign)
XTGRF – XTRA-GOLD RESOURCES CORP (Foreign)
XVE – VICEROY EXPLORATIONS LTD (Foreign)
ZINCQ – HORSEHEAD HOLDING CORP
ZMX – ZEMEX CORP