NioCorp Investor Presentation Deck

Wider Adoption of Critical Materials is Supply Constrained The Problem Lack of secure and reliable long-term supply is preventing fulfilment of latent market demand and realization of environmental benefits resulting from existing applications and from significant new technologies. This is due to: Concentrated sources of supply for Niobium, Scandium, and separated magnetic rare earth oxides. Extremely scarce and limited Scandium supply. Some supply chains have politically sensitive and unreliable supply locations, particularly rare earths. Environmental impacts from many of these sources are greater than in the U.S. NioCorp Critical Mineral Security Current Annual Niobium, Scandium, and Magnetic REE Oxide Production¹ Magris Resources 7 kt CBMM 66 kt CMOC 10 kt Rio Tinto 3t - 12t Estonia 0.4kt Russia 3t Niobium Production Scandium Production Magnetic REE Oxides The U.S. is dependent on foreign suppliers for most of NioCorp's critical minerals. China • 10t Sc₂03 • 50t Sc₂03 ¹ Corporate reports and company information, ONG Commodities, USGS, Adamas Intelligence 2 Reported by USGS as production capacity, not necessarily production. raw material2 China 52kt Philippines 7.5t Malaysia 5kt 10

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