NioCorp SPAC Presentation Deck

Ferroniobium 970,300 tonnes No production in the U.S. Highest grade Niobium project under development in N.A.¹ NioCorp Critical Mineral Security Critical Minerals in the Elk Creek Resource¹ Critical Minerals Scandium Oxide 11,337 tonnes No production in the U.S. Largest planned producer in N.A. Titanium Dioxide 4,221,000 tonnes High import reliance for U.S. Is expected to be produced by NioCorp as a byproduct. Magnetic Rare Earths Neodymium- Praseodymium Oxide² 125,800 tonnes No production in the U.S. Elk Creek Project contains the 2nd largest indicated NdPr Mineral Resource in the U.S.³ Dysprosium Oxide² 9,100 tonnes No production in the U.S. Elk Creek Project contains the 2nd largest indicated Dysprosium Mineral Resource in the U.S.³ Terbium Oxide² 2,300 tonnes No production in the U.S. Elk Creek Project contains the largest indicated Terbium Mineral Resource in the U.S.³ 1 Based on the 2022 NI 43-101 Elk Creek Technical Report. See "Mineral Reserves and Resources" in the Disclaimers & Technical Disclosures at the beginning of this presentation. 2 NioCorp is currently conducting technical and economic analyses on the potential addition of magnetic rare earth oxides to its planned product suite. 3 Indicated mineral resource, based on data from the "Critical Mineral Resources of the United States-Economic and Environmental Geology and Prospects for Future Supply," U.S. Geological Survey, 2017, and from company-issued reports. 18

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