NioCorp SPAC Presentation Deck

Critical Minerals & Rare Earths³ + A pure-play critical minerals project with the highest-grade Niobium deposit under development in North America, planned large- scale production of Scandium, and the second-largest indicated rare earth resource in the U.S.² NioCorp Critical Mineral Security A Shovel-Ready¹ Pure-Play Critical Minerals Project and the Second-Largest Indicated Rare Earth Resource in the U.S.² $2.8B NPV Not Including Rare Earth Potential ا... A completed Feasibility Study showing attractive potential economic returns.4 Long-Life Asset with Offtake Agreements 69 Large Mineral Reserve with a 38- year mine life.4 75% of planned Niobium production in the 1st 10 years has been pre-sold, and ~10% of planned Scandium production in the 1st 10 years has been pre-sold. Sustainable Development & GHG Reductions ✰ Project is guided by the Equator Principles ESG framework and incorporates recycling, water conservation, and many other sustainability strategies. It also presents a large Scope 3 GHG reductions potential.5 Owned and Permitted for Construction IIIII Key federal, state, and local permits secured to allow start of construction. Project is sited on private land with agreements in place with local landowners. NioCorp owns the primary land parcel. Significant State and Local Support Strong support from local communities and state and local government, including state tax relief valued as much as $200 million over 10 years.6 1 Subject to receipt of necessary project financing and commencement of operations at the Elk Creek Project. 2 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. 3 NioCorp is currently conducting technical and economic analyses on the potential addition of magnetic rare earth oxides to its planned product suite. 4 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. 5 Company estimate. See calculations on slide 32. 6 Contract signed July 23, 2021, with the State of Nebraska under the Nebraska Advantage Act. 17

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