NEWS

NOT FOR DISTRIBUTION TO UNITED STATES NEWS WIRE SERVICES OR FOR DISSEMINATION IN THE UNITED STATES

Vancouver, British Columbia – March 26, 2015 – NioCorp Developments Ltd. (“NioCorp” or the “Company”) (TSX: NBOTCQX: NIOBF; and FSE: BR3) is pleased to announce that it has filed and obtained a receipt (the “Receipt”) from securities regulators in British Columbia, Ontario, Alberta and Saskatchewan for a Final Short Form Prospectus dated March 23, 2015.

The prospectus qualifies the distribution of 2,914,000 units (the “Units”) of the Company issuable upon the deemed exercise of 2,914,000 previously issued special warrants (the “Special Warrants”).  Each Unit consists of one common share (each, a “Common Share”) and one Common Share purchase warrant (each a “Warrant”) of the Company.  Each Warrant entitles the holder to acquire one Common Share at a price of $1.00 until February 27, 2017.

Pursuant to the terms of the Special Warrants, the Special Warrants will be deemed to be exercised on Monday, March 30, 2015.

About the Company:  NioCorp is developing the only primary niobium deposit known to be under development in the U.S., and the highest grade undeveloped niobium deposit in North America, located near Elk Creek, Nebraska. The Company has announced an NI 43-101 compliant resource with an effective date of February 20, 2015 reporting an Indicated Resource of 80.5 million tonnes grading 0.71% Nb2O5, 2.68% TiO2 and 72 ppm Sc and an Inferred Resource of 99.6 million tonnes grading 0.56% Nb2O5, 2.31% TiO2 and 63 ppm Sc (at a 0.3% Nb2O5 cutoff grade). Niobium is mainly used in the form of Ferro-Niobium to produce HSLA (High Strength, Low Alloy) steel, which is a lighter, stronger steel used in automotive, structural and pipeline applications. The U.S. imports 100% of its niobium needs. Titanium in the form of an oxide is used extensively as a pigment in paints, plastics and papers. As a metal, titanium is used in aerospace applications, armor, chemical processing applications, marine hardware applications, medical implants, power generation and in sporting goods. Scandium is used in solid oxide fuel cells (SOFCs) and aluminum-scandium alloys, as well as in ceramics, electronics, lasers and lighting applications.

For further information, contact the Company at (604) 568-7365 or via email at [email protected].

ON BEHALF OF THE BOARD

“Peter Dickie”

President, Corporate Secretary and Director

Neither TSX nor its Regulation Services Provider (as that term is defined in the policies of the TSX) accepts responsibility for the adequacy or accuracy of this release.