NioCorp Developments (NB) Proxy filing summary

Executive summary

• Annual general meeting scheduled for March 20, 2025, at 10:00 a.m. MDT in Centennial, Colorado.

• Notice-and-access model used for electronic delivery of meeting materials, with paper copies available upon request.

• Only shareholders of record as of January 27, 2025, are eligible to vote at the meeting.

Voting matters and shareholder proposals

• Shareholders will consider audited financial statements for the year ended June 30, 2024.

• Election of seven directors for the ensuing year, with management recommending a vote for all nominees.

• Appointment of Deloitte & Touche LLP as independent auditors, with authorization for the board to set their remuneration.

• Advisory, nonbinding vote on executive compensation (say-on-pay), with board recommending approval.

• Other business may be considered if properly brought before the meeting.

Board of directors and corporate governance

• Seven directors to be elected for the upcoming year, with details provided in the information circular.