NioCorp Investor Presentation Deck

1 2 3 4 5 NioCorp Critical Mineral Security Strong State & Local Support The Elk Creek Project is located exclusively on private land with extensive nearby infrastructure (roads, rail, water, and utilities). The Elk Creek Project enjoys strong community support as well as state and local government support. Nebraska Governor Pete Ricketts nominated the Elk Creek Project as a "National High-Priority Infrastructure" Project to the White House.¹ Elk Creek Project is slated to receive approximately $200 million in tax benefits from the State of Nebraska over its first 10 years of operation.² Nebraska is reducing its state corporate income tax over time from 7.5% in 2022 to 3.99% in 2027³ Estimated Economic Benefits and New Tax Revenue Generated by the Elk Creek Project 4 Direct full-time, permanent jobs created 5 Indirect jobs created or supported Peak construction-related jobs5 Cumulative operating expenses over project life5 Employee payroll over project life (included in cumulative operating expenses above)5 https://www.mining.com/nebraska-governor-says-niocorps-elk-creek-high-priority-project/ Contract signed July 23, 2021 with the State of Nebraska under the Nebraska Advantage Act. New tax revenue to state and local government over project life5 Royalties paid to Nebraska landowners over project life5 $6.59 billion ~450 ~2,117 1,232 $1.1 billion $608 million The Elk Creek Project enjoys strong and broad-based state and local support. $300 million ¹ 3 https://governor.nebraska.gov/press/governor-pillen-signs-historic-tax-cuts-package#:~:text-Reduces%20the%20top%20individual%20and,care%2C%20for%20families%20and%20providers 4 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 2022 Elk Creek Technical Report. Estimates account for tax benefits NioCorp expected to receive from the Nebraska Advantage program. 6 Additional jobs created or supported was estimated using the Economic Policy Institute's Employment Multiplier for Metal Ore Mining, https://www.epi.org/publication/updated-employment-multipliers-for-the-u-s-economy/ 32

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