NioCorp to Ring The Nasdaq Stock Market's Opening Bell

NioCorp's Executive Team to Visit New York City and Ring the Opening Bell at The Nasdaq Stock Market on Thursday, March 30, 2023

CENTENNIAL, March 28, 2023 - NioCorp Developments Ltd. ("NioCorp") (Nasdaq:NB; TSX: NB) is pleased to announce that Mark A. Smith, NioCorp's CEO and Executive Chairman, will ring the opening bell on The Nasdaq Stock Market ("Nasdaq") at 9:30 a.m. on Thursday, March 30, 2023. NioCorp's stock began trading on Nasdaq on Tuesday, March 21, 2023 under the ticker symbol "NB."

• What: NioCorp to visit the Nasdaq MarketSite in New York City's Times Square to ring the Opening Bell.
• Who: NioCorp executives Mark A. Smith (CEO & Executive Chairman); Scott Honan (COO); Neal Shah (CFO); Jim Sims (CCO); Jeff Mason (Corporate Controller); and members of NioCorp's Board of Directors.
• Where: New York, New York: Nasdaq MarketSite - 4 Times Square on 43rd & Broadway at Broadcast Studio.
• When: Thursday, March 30, 2023 - 9:15 a.m. to 9:30 a.m. ET

Additional Information

A live webcast of the Nasdaq Opening Bell will be available at https://www.nasdaq.com/marketsite/bell-ringing-ceremony

For multimedia features such as exclusive content, photo postings, status updates, and video of bell ceremonies posted by Nasdaq, please visit these Facebook pages:

• https://www.facebook.com/nasdaq
• https://www.facebook.com/niocorp

Additional photos from the event will be posted on Nasdaq's and NioCorp's Instagram pages:

• http://instagram.com/nasdaq
• https://www.instagram.com/niocorp_developments/

For news tweets, please visit Nasdaq's and NioCorp's Twitter pages:

• http://twitter.com/nasdaq
• https://twitter.com/NioCorp

For additional information, see us on LinkedIn: https://www.linkedin.com/company/74331143/

Feed Information:

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For More Information

Contact Jim Sims, Corporate Communications Officer, NioCorp Developments Ltd., (720) 334-7066, jim.sims@niocorp.com

https://www.niocorp.com

About NioCorp

NioCorp is developing a critical minerals project in Southeast Nebraska that will produce niobium, scandium, and titanium. The Company also is evaluating the potential to produce several rare earths from the Project. Niobium is used to produce specialty alloys as well as High Strength, Low Alloy ("HSLA") steel, which is a lighter, stronger steel used in automotive, structural, and pipeline applications. Scandium is a specialty metal that can be combined with Aluminum to make alloys with increased strength and improved corrosion resistance. Scandium is also a critical component of advanced solid oxide fuel cells. Titanium is used in various lightweight alloys and is a key component of pigments used in paper, paint and plastics and is also used for aerospace applications, armor, and medical implants. Magnetic rare earths, such as neodymium, praseodymium, terbium, and dysprosium are critical to the making of Neodymium-Iron-Boron ("NdFeB") magnets, which are used across a wide variety of defense and civilian applications. Visit us at https://www.niocorp.com, https://www.facebook.com/niocorp, https://www.instagram.com/niocorp-developments/, on Twitter @NioCorp, and on LinkedIn at https://www.linkedin.com/company/74331143/

FORWARD-LOOKING STATEMENTS

This communication contains forward-looking statements within the meaning of the United States Private Securities Litigation Reform Act of 1995 and forward-looking information within the meaning of applicable Canadian securities laws. Forward-looking statements may include, but are not limited to, that the Elk Creek Project will produce niobium, scandium and titanium and the potential addition of magnetic rare earth oxides to NioCorp's planned product suite. Forward-looking statements are typically identified by words such as "plan," "believe," "expect," "anticipate," "intend," "outlook," "estimate," "forecast," "project," "continue," "could," "may," "might," "possible," "potential," "predict," "should," "would" and other similar words and expressions, but the absence of these words does not mean that a statement is not forward-looking.

The forward-looking statements are based on the current expectations of the management of NioCorp and are inherently subject to uncertainties and changes in circumstances and their potential effects and speak only as of the date of such statement. There can be no assurance that future developments will be those that have been anticipated. Forward-looking statements reflect material expectations and assumptions, including, without limitation, expectations and assumptions relating to: the future price of metals; the stability of the financial and capital markets; other current estimates and assumptions regarding NioCorp's business combination (the "Business Combination") with GX Acquisition Corp. II and NioCorp's previously announced standby equity purchase facility (the "Yorkville Equity Facility Financing" and, together with the Business Combination, the "Transactions") with YA II PN, Ltd., an investment fund managed by Yorkville Advisors Global, LP, and their expected benefits, including the ability to access the full amount of the expected net proceeds of the Yorkville Equity Facility Financing over the next three years; NioCorp's ability to receive a final commitment of financing from the Export-Import Bank of the United States ("EXIM"); anticipated benefits of the listing of NioCorp's common shares, without par value (the "Common Shares") on Nasdaq; the financial and business performance of NioCorp; NioCorp's anticipated results and developments in the operations of NioCorp in future periods; NioCorp's planned exploration activities; the adequacy of NioCorp's financial resources; NioCorp's ability to secure sufficient project financing to complete construction and commence operation of the Elk Creek Project; NioCorp's expectation and ability to produce niobium, scandium, and titanium at the Elk Creek Project; the outcome of current recovery process improvement testing, and NioCorp's expectation that such process improvements could lead to greater efficiencies and cost savings in the Elk Creek Project; the Elk Creek Project's ability to produce multiple critical metals; the Elk Creek Project's projected ore production and mining operations over its expected mine life; the completion of the demonstration plant and technical and economic analyses on the potential addition of magnetic rare earth oxides to NioCorp's planned product suite; the exercise of options to purchase additional land parcels; the execution of contracts with engineering, procurement and construction companies; NioCorp's ongoing evaluation of the impact of inflation, supply chain issues and geopolitical unrest on the Elk Creek Project's economic model; the impact of health epidemics, including the COVID-19 pandemic, on NioCorp's business and the actions NioCorp may take in response thereto. Such expectations and assumptions are inherently subject to uncertainties and contingencies regarding future events and, as such, are subject to change. Forward-looking statements involve a number of risks, uncertainties or other factors that may cause actual results or performance to be materially different from those expressed or implied by these forward-looking statements. These risks and uncertainties include, but are not limited to, those discussed and identified in public filings made by NioCorp with the U.S. Securities and Exchange Commission and with the applicable Canadian securities regulatory authorities and the following: the outcome of any legal proceedings that may be instituted against NioCorp following closing of the Transactions; the inability to access the full amount of the expected net proceeds under the Yorkville Equity Facility Financing over the next three years; the ability to recognize the anticipated benefits of the Transactions; unexpected costs related to the Transactions; NioCorp's ability to receive a final commitment of financing from EXIM on the anticipated timeline, on acceptable terms, or at all; NioCorp's ability to continue to meet Nasdaq listing standards; NioCorp's ability to operate as a going concern; risks relating to the Common Shares, including price volatility, lack of dividend payments and dilution or the perception of the likelihood any of the foregoing; NioCorp's requirement of significant additional capital; the extent to which our level of indebtedness and/or the terms contained in agreements governing our indebtedness or the Yorkville Equity Facility Financing may impair our ability to obtain additional financing; covenants contained in agreements with our secured creditors that may affect our assets; NioCorp's limited operating history; NioCorp's history of losses; the restatement of NioCorp's consolidated financial statements as of and for the fiscal years ended June 30, 2022 and 2021 and the interim periods ended September 30, 2021, December 31, 2021, and March 31, 2022 and the impact of such restatement on NioCorp's future financial statements and other financial measures; the material weakness in NioCorp's internal control over financial reporting, NioCorp's efforts to remediate such material weakness and the timing of remediation; the possibility that NioCorp may qualify as a "passive foreign investment company" under the U.S. Internal Revenue Code of 1986, as amended (the "Code"); the potential that the Transactions could result in NioCorp becoming subject to materially adverse U.S. federal income tax consequences as a result of the application of Section 7874 and related sections of the Code; cost increases for NioCorp's exploration and, if warranted, development projects; a disruption in, or failure of, NioCorp's information technology systems, including those related to cybersecurity; equipment and supply shortages; current and future offtake agreements, joint ventures, and partnerships; NioCorp's ability to attract qualified management; the effects of the COVID-19 pandemic or other global health crises on NioCorp's business plans, financial condition and liquidity; estimates of mineral resources and reserves; mineral exploration and production activities; feasibility study results; the results of metallurgical testing; changes in demand for and price of commodities (such as fuel and electricity) and currencies; competition in the mining industry; changes or disruptions in the securities markets; legislative, political or economic developments, including changes in federal and/or state laws that may significantly affect the mining industry; the impacts of climate change, as well as actions taken or required by governments related to strengthening resilience in the face of potential impacts from climate change; the need to obtain permits and comply with laws and regulations and other regulatory requirements; the timing and reliability of sampling and assay data; the possibility that actual results of work may differ from projections/expectations or may not realize the perceived potential of NioCorp's projects; risks of accidents, equipment breakdowns, and labor disputes or other unanticipated difficulties or interruptions; the possibility of cost overruns or unanticipated expenses in development programs; operating or technical difficulties in connection with exploration, mining, or development activities; the management of the water balance at the Elk Creek Project site; land reclamation requirements related to the Elk Creek Project; the speculative nature of mineral exploration and development, including the risks of diminishing quantities of grades of reserves and resources; claims on the title to NioCorp's properties; potential future litigation; and NioCorp's lack of insurance covering all of NioCorp's operations.

Should one or more of these risks or uncertainties materialize or should any of the assumptions made by the management of NioCorp prove incorrect, actual results may vary in material respects from those projected in these forward-looking statements.

All subsequent written and oral forward-looking statements concerning the Transactions or other matters addressed in this communication and attributable to NioCorp or any person acting on its behalf are expressly qualified in their entirety by the cautionary statements contained or referred to in this communication. Except to the extent required by applicable law or regulation, NioCorp undertakes no obligation to update these forward-looking statements to reflect events or circumstances after the date of this communication to reflect the occurrence of unanticipated events.

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SOURCE NioCorp Developments Ltd.