NioCorp Closes Business Combination with GXII and Separate Financing Deals Providing Access to Up to US$71.9 Million in Net Proceeds Over the Next Three Years

CENTENNIAL, Colo. , March 17, 2023 /PRNewswire/ -- NioCorp Developments Ltd. ("NioCorp" or the "Company") (TSX: NB; OTCQX: NIOBF) today announced the completion of its previously announced business combination (the "Business Combination") with GX Acquisition Corp. II ("GXII"). Further, NioCorp also announced the closing of both tranches of its previously announced convertible debt financing (the "Yorkville Convertible Debt Financing") with YA II PN, Ltd., an investment fund managed by Yorkville Advisors Global, LP (together with YA II PN, Ltd., "Yorkville"), and the effectiveness of its previously announced standby equity purchase facility with Yorkville (the "Yorkville Equity Facility Financing", and together with the Business Combination and the Yorkville Convertible Debt Financing, the "Transactions").