Niocorp was mentioned as #2 out of the top 10 largest U.S. headquartered companies by market capitalization involved in mineral development and exploration, but with no commercial mine production.
www.northernminer.com/news/top-10-u-s-developers-and-explorers/100379854
2. NIOCORP DEVELOPMENTS
Market cap: US$106 million
From its headquarters in Centennial, Colo., NioCorp Developments (TSX: NB; US-OTC: NIOBF) is developing its 100%-owned Elk Creek critical minerals project in southeast Nebraska, which has the potential to produce niobium, scandium and titanium. Over a 32-year operating life, the mine could annually produce 7,055 tonnes of ferroniobium, 103 tonnes of scandium trioxide and 11,445 tonnes of titanium dioxide, amounting to a projected gross life-of-mine revenue of US$17.6 billion."