developing, uranium mine(s) 
mining uranium
·
uranium mining halted ·
Macro Asia Corp. 
Macusani Yellowcake S.A.C.
Madero Minerals S.A.
Madison Metals Inc.
Magna Mining NL
Magnum Uranium Corp.
Magnum Minerals USA Corp.
Magnus International Resources, Inc.
Magyar Urán Zrt.
Maheshwari Mining Private Limited
Majescor Resources Inc.
Majesta Resources Inc.
Makena Resources Inc.
Malachite Resources NL
Malagasy Minerals Ltd
Malapai Resources Co.
Mamba Exploration Limited
Mancos Resources Inc.
Mandinga Resources SARL, Senegal
Mangrove (Pty) Ltd., Namibia
Manhattan Corporation Ltd
Manica Minerals Ltd
Manicouagan Minerals Inc.
Manson Creek Resources Ltd.
Mantle Mining Corporation Ltd.
Mantra Resources Ltd
Marathon Resources Ltd
Marengo Mining Limited
Mar Ked Mineral Exploration, Inc. (> SEC)
Marline Corp.
Marmota Ltd
Marubeni Corporation
Marum Resources Inc.
Marvel Discovery Corp.
Matamec Explorations Inc.
Matrix Metals Ltd
Mauritania Resources Ltd
Mauritania Ventures Ltd
Mavuzi Resources Ltd
Mawson Gold Ltd.
Maximus Resources Ltd
Maxore Minerals Corp.
MAX Resource Corp.
Medaro Mining Corp.
Mega Uranium Ltd.
MegaWatt Lithium and Battery Metals Corp.
Melkior Resources Inc.
Mercantile Gold Company
Mercator Gold plc
Mercer Gold Corp.
Mercest SA (Argentina)
Merrex Gold Inc.
Mesa Exploration Corp.
Metalex Ventures Ltd.
Metals Australia Ltd
Metals Creek Resources Corp.
Metamaterial Inc.
Metminco Ltd
Mexivada Mining Corp.
MGT Resources Ltd
Midasco Capital Corp.
Midland Exploration Inc.
MIE Metals Corp.
Midwest Uranium Corporation (> SEC)
Mill Bay Ventures Inc.
MillenMin Ventures Inc.
Millennia Resources AG
Millrock Resources Inc.
Mincor Resources NL
Mindax Ltd
Minemakers Ltd
Minera America del Sur SCM
Minera de Río Alagón SL
Mineral Commodities Ltd
Minergia S.A.C.
Minergy Tanzania Ltd (Mauritius)
Minotaur Exploration Ltd
Minroc Mines Inc.
Mintails Pty Ltd
Miramar Resources Ltd
Mitsubishi Corporation
Mitsui & Co, Ltd.
Mkango Resources Ltd
Moab Minerals Ltd
Monax Mining Ltd
Monitor Energy Ltd
Monster Copper Corporation
Monster Uranium Corp.
Montero Mining and Exploration Ltd
Montezuma Mining Company Ltd
Mootah Energetic Pty. Ltd. (Botswana)
Moss Resources Inc.
Mount Burgess Mining NL
MRG Metals Ltd
Mt Isa Metals Ltd
Mt Painter Joint Venture
Murphy Mining Pty Ltd
Mustang Energy Corp.
Mustang Geothermal Corp.
Myriad Uranium Corp.
Nabirm Global LLC
Namakwa Uranium (Proprietary) Limited
Namibia Critical Metals Inc.
Namibian Copper NL (> ASX)
Namibian Metals Ltd
Namibia Uranium Corporation
Namibia Uranium Pty Ltd
Namura Finland Oy
Namura Mineral Resources (Proprietary) Limited
Naples Capital Corp. (> SEDAR)
Navigator Resources Ltd
Navoi Mining and Milling Complex - NMMC
Nebu Resources Inc.
Neo Energy Metals Ltd
Neu Horizons Uranium Ltd
Neutron Energy Inc., Englewood, Colorado
Nevada Vanadium Mining Corp.
New Age Exploration Ltd (> ASX)
New America Energy Corp. (> SEC)
Newcrest Operations Ltd
Newera Resources Ltd
Newfoundland Goldbar Resources Inc. (> SEDAR)
New Horizon Uranium Corporation
New Island Resources Inc.
New Kush Exploration and Mining Company Limited
Newland Resources Ltd
New Mexico & Arizona Land Company - NZ
NewPeak Metals Ltd.
New Shoshoni Ventures Ltd.
New Stratus Energy Inc.
Newstrike Capital Inc. (> SEDAR)
NexGen Energy Ltd
NexHorizon Communications, Inc.
Nexus Uranium Corp.
NFU Wyoming, LLC
NGM Resources Ltd
NGX Ltd
NickelSearch Ltd
Nickel X Ltd
Nigeria Uranium Mining Co. Ltd. (NUMCO)
Niger Resources Inc.
Niger Uranium SA
Nimrodel Resources Ltd
92 Resources Corp.
NioGold Mining Corporation
Nio Strategic Metals Inc.
Noble Mineral Exploration Inc.
Noka Resources Inc.
Nordic Diamonds Ltd.
Norfolk Metals Ltd
Noronex Ltd
Noront Resources Ltd.
Norrsken Energy Limited
Nortec Minerals Corp.
North American Gem Inc.
North Atlantic Resources Ltd.
North Australian Diamonds Ltd
Northcore Resources Inc.
Northern Continental Resources Inc.
Northern Minerals Ltd
Northern Mining Ltd
Northern Star Resources Ltd
Northern Superior Resources Inc.
Northern Uranium Corp.
Northfield Metals Inc. (> SEDAR)
North River Resources plc
Northrock Resources Inc.
North Shore Uranium Ltd
Nova Energy (Namibia) Pty Ltd
Novastar Resources Ltd.
Nova Uranium Corp.
Novawest Resources Inc.
NQ Exploration Inc.
NT Resources Ltd
Nuclear Fuels Inc.
NU Energy Resources Pty Ltd
NuFuels, Inc.
Nuinsco Resources Limited
NuPower Resources Ltd
Nurlikum Mining, LLC
Nu Star Exploration, LLC (Arizona)
NVI Mining Ltd
NXA Inc.