NioCorp Investor Presentation Deck

Niobium 88% of the world's Niobium is produced in only one country¹ - Brazil - which increases supply chain risk and has forced the U.S. Government to stockpile Niobium. O O O O NIOBIUM: A Critical Supply Risk To The U.S. Market growth is expected to rise sharply with the expected use of niobium in next-generation Lithium- Ion batteries, which enables faster battery charging.² Light-weighting of transportation systems and strengthening of bridges and mega-infrastructure projects are expected to drive additional long-term growth. Highly liquid global market with many users and a growing number of applications. Global Niobium Supply =75 kt per annum¹ NioCorp Critical Mineral Security CBMM CMOC ■ Magris Global Niobium Sales by Sector² $3.3bn per annum¹ ■Construction ■Automotive and Transport Aerospace and Defense Oil and Gas ■ Other Global Niobium Demand Drivers Stronger and lighter steels for buildings & infrastructure mega-projects 0.025% Niobium in the steel of the Millau Viaduct bridge reduced the weight of steel and concrete by 60% in the overall project.³ Growing demand for lighter weight and more fuel- efficient cars, trucks, and buses 300 grams Nb reduces the weight of mid-size car by 200 kg and increases fuel efficiency by 5%.³ Next Generation Niobium- Lithium-Ion Batteries Significant potential demand. CBMM expects nearly 50 ktpa Nb Oxide sales by 2030.³ 1 "Niobium Outlook to 2030," Roskill, 2020. 2 Source: CBMM. 3 Source: Niobium.Tech (CBMM). 13

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