Mr. Jim Sims reports

NIOCORP TO VOLUNTARILY DELIST FROM THE TORONTO STOCK EXCHANGE AS OF CLOSE OF MARKETS ON MAY 3, 2024

Further to Niocorp Developments Ltd.'s news release dated April 17, 2024, the board of directors has approved the voluntary delisting of Niocorp's common shares from the Toronto Stock Exchange. It is expected that Niocorp's common shares will be delisted from the TSX effective as of close of markets on May 3, 2024. Niocorp's common shares will continue to be listed and trade on the Nasdaq Capital Market under the symbol NB.

Brokers outside the United States are encouraged to take appropriate steps to ensure that their clients may trade Niocorp shares on the Nasdaq following the TSX delisting.

About Niocorp Developments Ltd.

Niocorp is developing a critical minerals project in southeast Nebraska that is expected to produce niobium, scandium and titanium. The company also is evaluating the potential to produce several rare earths from the Elk Creek project. Niobium is used to produce specialty alloys, as well as high-strength, low-alloy 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, armour and medical implants. Magnetic rare earths, such as neodymium, praseodymium, terbium and dysprosium, are critical to the making of neodymium-iron-boron magnets, which are used across a wide variety of defence and civilian applications.

We seek Safe Harbor.