NEWSROOM

CENTENNIAL, Colo. (September 20, 2021) – NioCorp Developments Ltd. (“NioCorp” or the “Company“) (TSX: NB; OTCQX: NIOBF) is pleased to announce that it will conduct its 2021 Annual General Meeting (“AGM”) at 10 a.m. Mountain time on Thursday, December 2, 2021, at 7000 S. Yosemite Street, Lower Level Conference Room, Centennial, Colorado, 80112.

Shareholders of record as of October 15, 2021, are able to vote their shares on the proposals to be considered at the AGM either by proxy in advance of the meeting or at the meeting.  Proxy or voting instructions must be received in each case no later than 10:00 a.m., Mountain, on November 30, 2021, or no later than 48 hours before the AGM is reconvened following any adjournment or postponement.  Information on the proposals to be considered at the AGM, the Company’s 2021 Management Information Circular, and proxy voting instructions will be made public no later than October 25, 2021.

Because of continuing COVID infections and state and local government regulations regarding Colorado, NioCorp cannot predict what will be allowed by government ordinance in terms of a physical gathering for the AGM.  Shareholders eligible to vote their shares are strongly encouraged to do so via proxy in advance of the December 2, 2021, AGM in Colorado.

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@NioCorp $NB $NIOBF #Niobium #Scandium #ElkCreek #rareearth

For More Information

Contact Jim Sims, VP of External Affairs, NioCorp Developments Ltd., 303-503-6203, jim.sims@niocorp.com, https://www.niocorp.com

About NioCorp

NioCorp is developing a superalloy materials project in Southeast Nebraska that will produce Niobium, Scandium, and Titanium.  The Company also is evaluating the potential to produce several rare earth byproducts from the Project.  Niobium is used to produce superalloys 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 superalloy material 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 superalloys 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.

Forward-Looking Statements Disclaimers

Certain statements contained in this news release may constitute forward-looking statements.  Readers are cautioned that such forward-looking statements involve known and unknown risks, uncertainties and other factors that may cause a change in such assumptions and the actual outcomes and estimates to be materially different from those estimated or anticipated future results, achievements or position expressed or implied by those forward-looking statements. Risks, uncertainties and other factors that could cause NioCorp’s plans or prospects to change include risks related to the Company’s ability to operate as a going concern; risks related to the Company’s requirement of significant additional capital; changes in demand for and price of commodities (such as fuel and electricity) and currencies; changes in economic valuations of the Project, such as Net Present Value calculations, changes or disruptions in the securities markets; legislative, political or economic developments; the need to obtain permits and comply with laws and regulations and other regulatory requirements; 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 speculative nature of mineral exploration and development, including the risks of diminishing quantities of grades of reserves and resources; and the risks involved in the exploration, development and mining business and the risks set forth in the Company’s filings with Canadian securities regulators at www.sedar.com and the SEC at www.sec.gov. NioCorp disclaims any intention or obligation to update or revise any forward-looking statements whether as a result of new information, future events, or otherwise.