UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a)

of the Securities Exchange Act of 1934 (Amendment No. ___)

Filed by the Registrant ☒

Filed by a Party other than the Registrant ☐

Check the appropriate box:

☐

Preliminary Proxy Statement

☐

Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

☒

Definitive Proxy Statement

☐

Definitive Additional Materials

☐

Soliciting Material under §240.14a-12

NIOCORP DEVELOPMENTS LTD.

(Name of Registrant as Specified in its Charter)

Not Applicable.

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check all boxes that apply):

☒ No fee required.

☐ Fee paid previously with preliminary materials.

☐ Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.

NIOCORP DEVELOPMENTS LTD.

NOTICE OF MEETING

AND

MANAGEMENT INFORMATION

AND PROXY CIRCULAR

for the

Annual General Meeting of Shareholders

to be held on

April 6, 2026

The attached Notice of Meeting, Management Information and Proxy Circular and form of proxy and notes thereto for the annual general meeting of shareholders, together with the Company’s annual report to shareholders, are first being made available to shareholders of the Company on or about February 25, 2026.

Dear Fellow Shareholders,

I am pleased to present NioCorp Developments Ltd.’s Management Information and Proxy Statement and invite you to join our Annual General Meeting of Stockholders to be held on April 6, 2026 at 10:00 a.m. Mountain Daylight Time. Details on how to attend and vote are included in the accompanying materials.

2025 was the most successful calendar year in NioCorp’s history. We advanced financing efforts, strengthened federal government support, and continued technical and pre-construction efforts at the Elk Creek Critical Minerals Project in southeast Nebraska (the “Elk Creek Project”). These steps have materially improved our financial position, reduced development risk, and moved the Elk Creek Project closer to full project financing and construction.

During the calendar year, we advanced the due diligence process with the Export-Import Bank of the United States, including completion of an Independent Technical Review and environmental and social evaluation as part of a potential debt financing package of up to $800 million. We also completed our most active financing calendar year to date, raising more than $370 million in gross proceeds and $10 million of federal support under the Defense Production Act from the Pentagon. We ended the calendar year with a record consolidated cash balance of approximately $307 million and no debt. We also advanced work on an updated Feasibility Study for the Elk Creek Project and received Board approval to launch the mine portal project, our most significant pre-construction activity to date.

Our priorities for calendar 2026 remain clear: complete the updated Feasibility Study, finalize project financing, secure remaining commercial offtake agreements, and begin construction activities. We believe the progress achieved in 2025 positions NioCorp for a very big year in 2026.

On behalf of our Board and the entire NioCorp team, we sincerely appreciate your continued trust and support as we work to help establish a secure domestic source of critical minerals for the United States.

Sincerely,

/s/ Mark A. Smith

Mark A. Smith
Chairman and Chief Executive Officer
NioCorp Developments Ltd.

NIOCORP DEVELOPMENTS LTD.

NOTICE OF MEETING

NOTICE IS HEREBY GIVEN THAT the annual general meeting of shareholders (the “Meeting”) of NioCorp Developments Ltd. (the “Company”) will be held on Monday, April 6, 2026, at 10:00 a.m. Mountain Daylight Time (“MDT”) at 7000 S. Yosemite Street, Lower-Level Conference Room, Centennial, Colorado, 80112 for the following purposes:

to receive and consider the audited financial statements of the Company for the year ended June 30, 2025, together with the auditor’s report thereon;

to set the number of directors for the ensuing year at six;

to elect six directors to hold office until the next annual general meeting;

to appoint Deloitte & Touche LLP as auditors of the Company to hold office until the next annual general meeting and to authorize the Board of Directors to fix their remuneration through the Audit Committee;

to approve, on a nonbinding, advisory basis, the compensation of the Company’s named executive officers;

to approve the amendment and restatement of the NioCorp Developments Ltd. Long Term Incentive Plan, set out in Schedule B to the accompanying Management Information and Proxy Circular, including amendments thereto and unallocated entitlements thereunder;

to approve the amendment and extension of the Company’s Shareholder Rights Plan until the Company’s 2027 annual general meeting of shareholders; and

to transact such other business as may properly come before the Meeting or any adjournment or postponement thereof.

Being made available along with this Notice of Meeting are (i) the Management Information and Proxy Circular; (ii) a form of proxy and notes thereto; and (iii) the Company’s annual report to shareholders (collectively, the “Meeting Materials”).

The Company’s Board of Directors has fixed February 9, 2026, as the record date for the Meeting.

If you are a registered shareholder of the Company and are unable to attend the Meeting in person, you may vote: (i) via the Internet; (ii) by calling a toll-free telephone number; or (iii) if you received your proxy materials by mail, by dating and executing the form of proxy for the Meeting and depositing it by hand delivery or by mail with Computershare Investor Services Inc., Proxy Dept., 320 Bay Street, 14th Floor, Toronto, Ontario, M5H 4A6. Instructions for telephone and Internet voting are included in the notice that the Company mailed to shareholders on or about February 25, 2026. All instructions are also listed in the form of proxy and notes thereto. Your proxy or voting instructions must be received in each case no later than 10:00 a.m. MDT on April 2, 2026, or no later than 48 hours before the Meeting is reconvened following any adjournment or postponement.

If you are a non-registered shareholder of the Company and receive these materials through your broker or another intermediary, please complete and return the materials in accordance with the instructions provided to you by your broker or such other intermediary.

The Meeting Materials are first being made available to shareholders of the Company on or about February 25, 2026.

DATED at Centennial, Colorado, this 25th day of February, 2026.

	BY ORDER OF THE BOARD OF DIRECTORS

	/s/ MARK A. SMITH
	MARK A. SMITH
	Chief Executive Officer

Table of Contents

MANAGEMENT SOLICITATION OF PROXIES	7
INFORMATION ABOUT PROXIES	8
Solicitation of Proxies	8
Appointment of Proxyholder and Return of Proxy	9
Revocation of Proxy	9
Voting of Proxies and Exercise of Discretion by Proxyholders	10
Voting by Beneficial Shareholders	10
Securities Entitled to Vote	11
Broker Non-Votes, Abstentions and Quorum	11
INTERESTS OF CERTAIN PERSONS IN MATTERS TO BE ACTED UPON	11
PRINCIPAL SHAREHOLDERS	12
Security Ownership of Certain Beneficial Owners	14
No Hedging or Other Speculative Transactions by Employees, Officers and Directors	14
Change in Control Arrangements	14
FINANCIAL STATEMENTS	14
PARTICULARS OF MATTERS TO BE ACTED UPON	14
I AND II – NUMBER AND ELECTION OF DIRECTORS	14
Director Nominees	15
Arrangements between Officers and Directors	17
Family Relationships	18
Other Directorships	18
Legal Proceedings	18
Voting Procedures for the Election of Directors	18
III – APPOINTMENT OF AUDITORS	19
Principal Accountant Fees and Services	21
Pre-approval Policies	21
Voting Procedures for Appointment of Auditor	21
IV – ADVISORY VOTE TO APPROVE NAMED EXECUTIVE OFFICER COMPENSATION (“SAY-ON-PAY PROPOSAL”)	22
V – APPROVE AMENDMENT AND RESTATEMENT OF THE NIOCORP DEVELOPMENTS LTD. LONG TERM INCENTIVE PLAN	22
VI – APPROVE AMENDMENT AND EXTENSION OF COMPANY’S SHAREHOLDER RIGHTS PLAN	33
Objectives and Background of the Rights Plan	33
Background	33
Summary of the Rights Plan	33
Effective Date and Term	34
Issue of Rights	34
Rights Exercise Privilege	34
Trading of Rights	35

Permitted Lock-up Agreements	35
Permitted Bid Requirements	36
Waiver	37
Redemption	37
Amendment	37
Exception for Investment Advisors	38
Shareholder Approval	38
CORPORATE GOVERNANCE	38
Director Independence	39
Board Meetings	39
Corporate Governance Guidelines	40
Position Descriptions	40
Orientation and Continuing Education	40
Board Committees	41
Audit Committee and Audit Committee Financial Experts	41
Relevant Education and Experience of Audit Committee Members	42
Audit Committee Report	43
Compensation Committee	43
Safety and Sustainability Committee	44
Nominating and Corporate Governance Committee	44
Assessments	46
Board of Directors Tenure	46
Ethical Business Conduct	46
Insider Trading Policy	47
Code of Business Conduct and Ethics	47
Board Role in Risk Oversight	47
Board Leadership Structure	47
Fiscal 2025 Director Compensation	48
Communications with Directors	48
EXECUTIVE OFFICERS	49
EXECUTIVE COMPENSATION	50
Fiscal 2025 Summary Compensation Table	50
Narrative Disclosure to Summary Compensation Table	51
Outstanding Equity Awards at 2025 Fiscal Year End	54
EQUITY COMPENSATION PLANS	55
Description of the 2017 Long-Term Incentive Plan	56
Exchange Controls	56
Certain Canadian Federal Income Tax Considerations for U.S. Residents	56
PAY VERSUS PERFORMANCE	57
PERFORMANCE GRAPH	60
INDEBTEDNESS OF DIRECTORS AND EXECUTIVE OFFICERS	61
INTEREST OF INFORMED PERSONS IN MATERIAL TRANSACTIONS	61
MANAGEMENT CONTRACTS	61
CERTAIN RELATIONSHIPS AND RELATED PERSON TRANSACTIONS	61
Related Person Transactions	61
Review, Approval or Ratification of Related Person Transactions	62
DELINQUENT SECTION 16(A) REPORTS	63
SHAREHOLDER PROPOSALS	63
DISSENTERS’ RIGHTS OF APPRAISAL	64
MULTIPLE SHAREHOLDERS SHARING THE SAME ADDRESS	64
ADDITIONAL INFORMATION	64
OTHER MATERIAL FACTS	65

NIOCORP DEVELOPMENTS LTD.

7000 South Yosemite Street, Suite 115

Centennial, CO 80112

MANAGEMENT INFORMATION AND PROXY CIRCULAR

MANAGEMENT SOLICITATION OF PROXIES

This Management Information and Proxy Circular (“Information Circular”) is furnished to you, as a holder of common shares in the capital of the Company (“Common Shares”), in connection with the solicitation of proxies by management and the Board of Directors (the “Board”) of NioCorp Developments Ltd. (“we,” “us,” “our,” “NioCorp” or the “Company”) for use at the Annual General Meeting of Shareholders of the Company (the “Meeting”) to be held on Monday, April 6, 2026, at 10:00 a.m. Mountain Daylight Time (“MDT”) at 7000 S. Yosemite Street, Lower Level Conference Room, Centennial, Colorado, 80112 and at any adjournment of the Meeting for the following purposes:

to receive and consider the audited financial statements of the Company for the year ended June 30, 2025, together with the auditor’s report thereon;

to set the number of directors for the ensuing year at six (the “number of directors proposal”);

to elect six directors to hold office until the next annual general meeting;

to appoint Deloitte & Touche LLP (“Deloitte”) as auditors of the Company to hold office until the next annual general meeting and to authorize the Board to fix their remuneration through the Audit Committee (the “appointment of auditors proposal”);

to approve, on a nonbinding, advisory basis, the compensation of our named executive officers (the “say-on-pay proposal”);

to approve the amendment and restatement of the NioCorp Developments Ltd. Long Term Incentive Plan, set out in Schedule B hereto, including amendments thereto and unallocated entitlements thereunder (the “LTIP amendment and restatement proposal”);

to approve the amendment and extension of the Company’s Shareholder Rights Plan until the Company’s 2027 annual general meeting of shareholders (the “Shareholder Rights Plan extension proposal”); and

to transact such other business as may properly come before the Meeting or any adjournment or postponement thereof.

For purposes of this Information Circular, management’s solicitation of proxies on matters subject to the vote of the shareholders shall also be deemed to be a solicitation by the Board.

It is anticipated that the Notice of Meeting, this Information Circular, our Annual Report to Shareholders and the accompanying form of proxy (collectively, the “Meeting Materials”) will be first made available to shareholders on or about February 25, 2026. Unless otherwise stated, the information contained in this Information Circular is given as of February 9, 2026.

The principal executive office of the Company is located at 7000 South Yosemite Street, Suite 115, Centennial, Colorado 80112. The registered and records office of the Company is located at 1133 Melville Street, Suite 3500, The Stack, Vancouver, British Columbia V6E 4E5 (ATTN: Blake, Cassels & Graydon LLP).

All references to currency in this Information Circular are in U.S. dollars, unless otherwise indicated.

Information regarding the proxies being solicited in connection with the Meeting is set out in the section below under the heading “Information about Proxies.”

IMPORTANT NOTICE REGARDING THE AVAILABILITY OF PROXY MATERIALS FOR THE ANNUAL GENERAL MEETING OF SHAREHOLDERS TO BE HELD ON APRIL 6, 2026:

For this Meeting, the Company is utilizing the notice-and-access method of delivery of materials to its registered shareholders and Canadian and U.S. beneficial shareholders as set out in National Instrument 54-101, Communication with Beneficial Owners of Securities of a Reporting Issuer (“NI 54-101”) and National Instrument 51-102 Continuous Disclosure Obligations and Rule 14a-16 under the U.S. Securities Exchange Act of 1934, as amended (the “Exchange Act”). The Company is making the Meeting Materials available electronically via the Internet. The Company is mailing to shareholders a notice containing instructions on how to access and review the Meeting Materials and vote online (the “Notice of Internet Availability of Meeting Materials”). You will not receive a printed copy of the Meeting Materials in the mail unless requested. If you would like a printed copy of the Meeting Materials, follow the instructions for requesting them that are included in the Notice of Internet Availability of Meeting Materials. The Company has elected not to use the procedure known as “stratification” in relation to its use of the notice-and-access rules. Stratification occurs when a reporting issuer using the notice-and-access rules provides a paper copy of proxy-related materials to some, but not all, of its shareholders.

There are two kinds of non-registered, or beneficial, shareholders–those who object to their name being made known to the issuers of securities which they own (called “OBOs” for Objecting Beneficial Owners) and those who do not object to the issuers of the securities they own knowing who they are (called “NOBOs” for Non-Objecting Beneficial Owners). In accordance with NI 54-101, the Company has elected to send the Meeting Materials indirectly to the NOBOs and to the OBOs through their intermediaries. The Company will pay for intermediaries to forward the Meeting Materials to OBOs.

INFORMATION ABOUT PROXIES

Solicitation of Proxies

The Company will conduct its solicitation of proxies and our officers, directors and employees may, without receiving special compensation, contact shareholders by telephone, electronic means or other personal contact. We will not specifically engage employees to solicit proxies. We will pay the expenses of this solicitation; however, we do not reimburse shareholders, nominees or agents (including brokers holding shares on behalf of clients) for their costs of obtaining authorization from their principals to sign proxies. The Company has engaged Morrow Sodali LLC, a professional proxy solicitation firm, to assist in soliciting proxies for the Meeting. Under the engagement, Morrow Sodali LLC will solicit proxies on behalf of the Company by mail, telephone, electronic communications and other customary means. The Company will pay Morrow Sodali LLC a fee of $20,000, plus reimbursement of customary

and reasonable out-of-pocket expenses incurred in connection with the solicitation of proxies. The costs of Morrow Sodali LLC’s services and all other proxy solicitation costs will be borne by the Company.

Appointment of Proxyholder and Return of Proxy

The persons named in the form of proxy for the Meeting attached hereto as Schedule A are officers of the Company and nominees of management. A shareholder has the right to appoint some other person, who need not be a shareholder, to represent such shareholder at the Meeting by inserting that other person’s name in the blank space provided on the form of proxy. If a shareholder appoints one of the persons designated in the accompanying form of proxy as a nominee and does not direct the said nominee to vote “FOR” or “AGAINST” with respect to the number of directors proposal, “FOR” or “WITHHOLD” with respect to each of the nominees for director listed therein and the appointment of auditors proposal, “FOR,” “AGAINST,” or “ABSTAIN” with respect to the say-on-pay proposal, the LTIP amendment and restatement proposal, and the Shareholder Rights Plan extension proposal, or where instructions on the form of proxy are uncertain with respect to which an opportunity to specify how the Common Shares registered in the name of such registered shareholder shall be voted is provided, the proxy shall be voted “FOR” with respect to the number of directors proposal, each of the nominees for director listed therein, the appointment of auditors proposal, the say-on-pay proposal, the LTIP amendment and restatement proposal, and the Shareholder Rights Plan extension proposal.

In order for a proxy to be valid, it must be:

(a)

signed by the registered shareholder whose name appears thereon or by such registered shareholder’s attorney authorized in writing, or if the registered shareholder is a corporation, by a duly authorized representative on behalf of such corporation; and

(b)

returned in one of the following manners:

(i)

by hand delivery or by mail addressed to Computershare Investor Services Inc., Proxy Dept., 320 Bay Street, 14th Floor, Toronto, Ontario, M5H 4A6, and received by 10:00 a.m. MDT on April 2, 2026, or no later than 48 hours before the Meeting is reconvened following any adjournment or postponement;

(ii)

by facsimile to Computershare Investor Services Inc. at 1-866-249-7775 (within North America) or 1-416-263-9524 (outside North America) and received by 10:00 a.m. MDT on April 2, 2026, or no later than 48 hours before the Meeting is reconvened following any adjournment or postponement; or

(iii)

by deposit with the chair of the Meeting prior to commencement of the Meeting.

An executed proxy that is returned undated will be deemed to be dated the date of the mailing of the form of proxy by the Company or its agent.

Alternatively, a registered shareholder may vote via the Internet or by telephone by following the instructions included in the Notice of Internet Availability of Meeting Materials, in each case no later than 10:00 a.m. MDT on April 2, 2026, or no later than 48 hours before the Meeting is reconvened following any adjournment or postponement. All instructions for how to vote are listed in the accompanying form of proxy and notes thereto.

Revocation of Proxy

If you are a registered shareholder who has returned a valid proxy, you may revoke your proxy at any time before it is exercised. In addition to revocation in any other manner permitted by law, a registered shareholder who has given a proxy may revoke it by:

(a)

signing a proxy bearing a later date; or

(b)

signing a written notice of revocation in the same manner as the form of proxy is required to be signed as set out in the notes to the proxy.

The later proxy or the notice of revocation must be delivered to the office of the Company’s registrar and transfer agent or to the Company’s principle executive offices at any time up to and including the last business day before the

scheduled time of the Meeting or the reconvening of the Meeting following any adjournment, or to the chair of the Meeting on the day of the Meeting or the reconvening of the Meeting following any adjournment.

You may also revoke your proxy by voting via Internet or telephone at a later date than the date of the proxy, or by attending the meeting and voting in person.

If you are a non-registered shareholder (a “Beneficial Shareholder”) who wishes to revoke a VIF (as defined herein) or to revoke a waiver of your right to receive Meeting Materials and to give voting instructions, you must give written instructions to your broker, agent, trustee or other intermediary through which you hold your Common Shares in accordance with the applicable procedures and deadlines of your broker, agent, trustee or other intermediary.

Voting of Proxies and Exercise of Discretion by Proxyholders

The persons named in the accompanying form of proxy will vote, withhold, or abstain from voting the Common Shares represented by the proxy in accordance with your instructions, provided your instructions are clear. You may indicate the manner in which the persons named in the form of proxy are to vote on any matter by marking an “X” in the appropriate space. If you have specified a choice on any matter to be acted on at the Meeting, your shares will be voted, withheld, or abstained from voting accordingly. If you do not specify a choice or where you specify more than one choice for any matter to be acted on, your shares will be voted in accordance with management’s recommendations on such matters.

The form of proxy gives the persons named as proxy holders discretionary authority regarding amendments or variations to matters identified therein and any other matter that may properly come before the Meeting. As of the date of this Information Circular, our management is not aware of any such amendment, variation or other matter proposed or likely to come before the Meeting. However, if any such amendment, variation or other matter properly comes before the Meeting, the persons named in the form of proxy intend to vote on such other business in accordance with their judgment.

Voting by Beneficial Shareholders

The information set out in this section is important to many shareholders as a substantial number of shareholders hold their Common Shares through a broker, agent, trustee or other intermediary.

Beneficial Shareholders should note that only proxies deposited by registered shareholders whose names appear on the share register of the Company as of February 9, 2026, the record date for the Meeting, may be recognized and acted upon at the Meeting. If Common Shares are shown on an account statement provided to a Beneficial Shareholder by a broker, then, in almost all cases, the name of such Beneficial Shareholder will not appear on the share register of the Company. Such Common Shares will most likely be registered in the name of the broker or an agent of the broker. In Canada, the vast majority of such shares will be registered in the name of “CDS & Co.,” the registration name of CDS Clearing and Depositary Services Inc., and in the United States, the vast majority will be registered in the name of “Cede & Co.,” the registration name of The Depository Trust Company, which entities act as nominees for many brokerage firms. Common Shares held by brokers, agents, trustees or other intermediaries can only be voted by those brokers, agents, trustees or other intermediaries in accordance with instructions received from Beneficial Shareholders. As a result, Beneficial Shareholders should carefully review the voting instructions provided by their intermediary with this Information Circular and ensure they communicate how they would like their Common Shares voted in accordance with those instructions.

Intermediaries will frequently use service companies to forward proxy solicitation information to Beneficial Shareholders. Generally, a Beneficial Shareholder who has not waived the right to receive such information will either:

(a)

be given a form of proxy which (i) has already been signed by the intermediary (typically by a facsimile, stamped signature), (ii) is restricted as to the number of shares beneficially owned by the Beneficial Shareholder, and (iii) must be completed, but not signed, by the Beneficial Shareholder and deposited with Computershare Investor Services Inc.; or

(b)

more typically, be given a voting instruction form (“VIF”), which (i) is not signed by the intermediary, and (ii) when properly completed and signed by the Beneficial Shareholder and returned to the intermediary or its service company, will constitute voting instructions which the intermediary must follow.

VIFs should be completed and returned in accordance with the specific instructions noted on the VIF. The purpose of this procedure is to permit Beneficial Shareholders to direct the voting of the Common Shares which they beneficially own.

Please return your voting instructions as specified in the VIF. Beneficial Shareholders should carefully follow the instructions set out in the VIF, including those regarding when and where the VIF is to be delivered.

Although Beneficial Shareholders may not be recognized directly at the Meeting for the purpose of voting Common Shares registered in the name of their broker, agent, trustee or other intermediary, a Beneficial Shareholder may attend the Meeting as a proxyholder for a shareholder and vote Common Shares in that capacity. Beneficial Shareholders who wish to attend the Meeting or have someone else attend on their behalf and indirectly vote their Common Shares as proxyholder for the registered shareholder should contact their broker, agent, trustee or other intermediary well in advance of the Meeting to determine the steps necessary to permit them to indirectly vote their Common Shares as a proxyholder.

Securities Entitled to Vote

The Company is authorized to issue an unlimited number of Common Shares, of which 125,321,172 Common Shares are issued and outstanding as of February 9, 2026. There is only one class of shares.

The Board has fixed February 9, 2026, as the record date for the purpose of determining the shareholders entitled to receive notice of and vote at the Meeting. Persons who are registered shareholders at the close of business on February 9, 2026, will be entitled to receive notice of, attend, and vote at the Meeting. By ballot, every shareholder and proxyholder will have one vote for each Common Share. Other than with respect to the election of directors, a majority (i.e., at least 50% plus one vote) of the votes cast will be required to pass an ordinary resolution at the Meeting, and at least two-thirds of the votes cast will be required to pass a special resolution at the Meeting. Each of the resolutions that shareholders will be asked to approve at the Meeting, to pass the management proposals set forth in this Information Circular, are ordinary resolutions.

Broker Non-Votes, Abstentions and Quorum

Brokers and other intermediaries, holding shares in street name for their customers, are required to vote the shares in the manner directed by their customers. Under the rules of the New York Stock Exchange, brokers are prohibited from giving proxies to vote on non-routine matters (including, but not limited to, non-contested director elections), unless the beneficial owner of such shares has given voting instructions on the matter.

The absence of a vote on a matter where the broker has not received written voting instructions from a Beneficial Shareholder is referred to as a “broker non-vote.” Any shares represented at the Meeting but not voted (whether by abstention, broker non-vote or otherwise) will have no impact on any matters to be acted upon at the Meeting.

Under the Articles of the Company, a quorum for the transaction of business at the Meeting is two or more persons present and being, or representing by proxy, 33 1/3% of the outstanding shares entitled to be voted on at the Meeting.

Abstentions will be counted as present for purposes of determining the presence of a quorum at the Meeting but will not be counted as votes cast. Broker non-votes will not be counted as present for purposes of determining the presence of a quorum for purposes at the Meeting and will not be voted. Accordingly, neither abstentions nor broker non-votes will have any effect on the outcome of the votes on the matters to be acted upon at the Meeting.

INTERESTS OF CERTAIN PERSONS IN MATTERS TO BE ACTED UPON

Except as disclosed herein, none of the directors or executive officers of the Company, nor any person who has held such a position since the beginning of the last completed fiscal year of the Company, nor any proposed nominee for

election as a director of the Company, nor any associate or affiliate of the foregoing persons, has any substantial or material interest, direct or indirect, by way of beneficial ownership of securities or otherwise, in any matter to be acted on at the Meeting.

PRINCIPAL SHAREHOLDERS

The following table sets forth the beneficial ownership of Common Shares of NioCorp as of February 9, 2026 (except otherwise where indicated) for the following: (1) each person who is known by NioCorp to beneficially own more than 5% of the outstanding shares of NioCorp’s Common Shares; (2) each of the named executive officers (as defined in the “Fiscal 2025 Summary Compensation Table,” below); (3) each of NioCorp’s directors; and (4) all directors and executive officers of NioCorp as a group.

Beneficial ownership of Common Shares in the table below is determined in accordance with the rules of the U.S. Securities and Exchange Commission (the “SEC”) and includes voting or investment power with respect to the Common Shares. Common Shares that may be acquired by an individual or group within 60 days of February 9, 2026, pursuant to the exercise of options to purchase Common Shares (“Options”), the exercise of Common Share purchase warrants (“Warrants”) or the exchange of shares of Class B common stock of Elk Creek Resources Corp (“ECRC”) (formerly known as GX Acquisition Corp. II (“GXII”), are deemed to be outstanding for the purpose of computing the percentage ownership of such individual or group but are not deemed to be outstanding for the purpose of computing the percentage ownership of any other person shown in the table. Percentage of ownership is based on 125,321,172 Common Shares outstanding as of February 9, 2026. Unless otherwise noted in the table below, Options vested at the grant date.

Except as indicated in footnotes to this table, we believe that the shareholders named in this table have sole voting and investment power with respect to all Common Shares shown to be beneficially owned by them, based on information provided to us by such shareholders. Unless otherwise indicated, the address for each director and executive officer listed is: c/o NioCorp Developments Ltd., 7000 South Yosemite Street, Suite 115, Centennial, CO 80112.

Name and Address of Beneficial Owner	Position	Amount and Nature of Beneficial Ownership (1)(2)		Percent of Common Shares
Mark A. Smith, PE, Esq. Highlands Ranch, Colorado, USA	Chief Executive Officer, President, Executive Chairman and Director	3,316,452	(3)	2.63%
Neal Shah Superior, Colorado, USA	Chief Financial Officer and Corporate Secretary	550,032	(4)	*
Scott Honan Centennial, Colorado, USA	Chief Operating Officer	530,762	(5)	*
Anthony W. Fulton Lincoln, Nebraska, USA	Director	251,209	(6)	*
David C. Beling Grand Junction, Colorado, USA	Director	229,013	(7)	*
Nilsa Guerrero-Mahon Brighton, Colorado, USA	Director	259,768	(8)	*
Dean C. Kehler New York, New York, USA	Director	3,708,811	(9)	2.88%
Michael G. Maselli Pelham, New York, USA	Director	655,235	(10)	*
Peter Oliver Bunbury, Western Australia, Australia	Lead Director	160,400	(11)	*
All current directors, executive officers and named executive officers as a group (11 persons)		10,228,610		8.16%
Entities affiliated with Citadel Advisors LLC Miami, Florida, USA		7,951,251	(12)	6.34%

* Represents ownership of less than 1%.

(1)

Calculated in accordance with Rule 13d-3 of the Exchange Act.

(2)

On March 17, 2023, NioCorp effected a 1-to-10 reverse stock split (the “Reverse Stock Split”) of the Common Shares, with any fractional shares resulting from the Reverse Stock Split rounded down to the nearest whole share. All Options and Warrants outstanding as of March 17, 2023, were adjusted to reflect the Reverse Stock Split. Such Options and Warrants initially covered a number of shares equal to the amount reported herein times 10 (and at an exercise price equal to the amount reported herein divided by 10). Class B common stock of ECRC, which may be exchanged for Common Shares upon certain conditions, were issued on a post-Reverse Stock Split basis.

(3)

Mr. Smith beneficially owns 2,318,819 outstanding Common Shares. In addition, he beneficially owns 275,133 Common Shares issuable upon exercise of: (i) 183,422 Warrants each exercisable for one Common Share at a price of $1.75 until November 13, 2026; and (ii) 91,711 Warrants each exercisable for one Common Share at a price of $2.07 until November 13, 2029. He also beneficially owns 722,500 Common Shares issuable upon exercise of vested Options each exercisable for one Common Share. The total does not include 247,500 Common Shares that may be issuable upon exercise of unvested Options.

(4)

Mr. Shah beneficially owns 75,032 outstanding Common Shares. In addition, he beneficially owns 475,000 Common Shares issuable upon exercise of vested Options each exercisable for one Common Share. The total does not include 165,000 Common Shares that may be issuable upon exercise of unvested Options.

(5)

Mr. Honan beneficially owns 55,762 outstanding Common Shares. In addition, he beneficially owns 475,000 Common Shares issuable upon exercise of vested Options each exercisable for one Common Share. The total does not include 165,000 Common Shares that may be issuable upon exercise of unvested Options.

(6)

Mr. Fulton beneficially owns 179,350 outstanding Common Shares. He shares both voting and investment power with respect to 2,276 of such Common Shares with members of his family. In addition, he beneficially owns 54,859 Common Shares issuable upon exercise of 49,058 Warrants assumed by NioCorp in connection with its business combination with GXII (“NioCorp Assumed Warrants”) each exercisable for 1.11829212 Common Shares at a price of $11.50 until March 17, 2028. He shares both voting and investment power with respect to 12,335 Common Shares issuable upon exercise of 11,032 of such NioCorp Assumed Warrants with members of his family. He also beneficially owns 17,000 Common Shares issuable upon exercise of vested Options each exercisable for one Common Share. The total does not include 33,000 Common Shares that may be issuable upon exercise of unvested Options.

(7)

Mr. Beling beneficially owns 72,013 outstanding Common Shares. In addition, he beneficially owns 157,000 Common Shares issuable upon exercise of vested Options each exercisable for one Common Share. The total does not include 33,000 Common Shares that may be issuable upon exercise of unvested Options.

(8)

Ms. Guerrero-Mahon beneficially owns 46,068 outstanding Common Shares. In addition, she beneficially owns 213,700 Common Shares issuable upon exercise of vested Options each exercisable for one Common Share. The total does not include 33,000 Common Shares that may be issuable upon exercise of unvested Options.

(9)

Mr. Kehler beneficially owns 212,583 outstanding Common Shares, and 1,441,290 Common Shares issuable upon the exchange of Vested Shares (as defined herein). He shares both voting and investment power with respect to 318,470 of such Vested Shares with U.S. Trust Company of Delaware, as co-trustee of the Elizabeth Kehler 2012 Family Trust under Declaration of Trust dated December 12, 2012 (the “Elizabeth Kehler Trust”). In addition, he beneficially owns 1,937,938 Common Shares issuable upon exercise of the following: (i) 1,657,057 NioCorp Assumed Warrants exercisable for an aggregate of up to 1,853,073 Common Shares held by Mr. Kehler; (ii) 56,577 Warrants each exercisable for one Common Share at a price of $1.75 until November 13, 2026; and (iii) 28,288 Warrants each exercisable for one Common Share at a price of $2.07 until November 13, 2029. He also beneficially owns 117,000 Common Shares issuable upon exercise of vested Options each exercisable for one Common Share. The total does not include 33,000 Common Shares that may be issuable upon exercise of unvested Options. The total does not include Common Shares that may be issuable upon exchange of the following: (i) 417,030 that are not exchangeable until the volume-weighted average price of the Common Shares on the principal securities exchange for the Common Shares as reported by Bloomberg (“VWAP”) equals or exceeds approximately $12.00 per share for 20 of any 30 consecutive trading days during the period from the closing of the business combination with GXII on March 17, 2023 through, and including, the tenth anniversary of the such date (such period, the “Earnout Share Period”) on any stock exchange on which the Common Shares are then trading (“Tranche I Earnout Shares”) held by Mr. Kehler; (ii) 417,030 that are not exchangeable until the VWAP of the Common Shares equals or exceeds approximately $15.00 per share for 20 of any 30 consecutive trading days during the Earnout Share Period on any stock exchange on which the Common Shares are then trading (“Tranche II Earnout Shares”) held by Mr. Kehler; (iii) 118,284 Tranche I Earnout Shares held by the Elizabeth Kehler Trust; and (iv) 118,284 Tranche II Earnout Shares held by the Elizabeth Kehler Trust.

(10)

Mr. Maselli beneficially owns 323,085 outstanding Common Shares. In addition, Mr. Maselli beneficially owns 215,150 Common Shares issuable upon exercise of 192,392 NioCorp Assumed Warrants held by Mr. Maselli. He also beneficially owns 117,000 Common Shares issuable upon exercise of vested Options each exercisable for one Common Share. The total does not include 33,000 Common Shares that may be issuable upon exercise of unvested Options. The total does not include Common Shares that may be issuable upon exchange of the following: (i) 119,998 Tranche I Earnout Shares held by Mr. Maselli; and (ii) 119,998 Tranche II Earnout Shares held by Mr. Maselli.

(11)

Mr. Oliver beneficially owns 160,400 outstanding Common Shares issuable upon exercise of vested Options each exercisable for one Common Share. The total does not include 39,600 Common Shares that may be issuable upon exercise of unvested Options.

(12)

Based on a Schedule 13G/A filed on November 14, 2025 by Citadel Advisors LLC (“Citadel Advisors”), Citadel Advisors Holdings LP (“CAH”), Citadel GP LLC (“CGP”), Citadel Securities LLC (“Citadel Securities”), Citadel Securities Group LP (“CALC4”), Citadel Securities GP LLC (“CSGP”) and Mr. Kenneth Griffin (collectively, the “Reporting Persons”), with respect to the Common Shares owned by Citadel Multi-Strategy Equities Master Fund Ltd., a Cayman Islands company (“CM”), Citadel Multi-Strategy Equities (Ireland) DAC, an Ireland designated activity company (“CMSI”), and Citadel Securities. Citadel Advisors is the portfolio manager for CM and CMSI. CAH is the sole member of Citadel Advisors. CGP is the general partner of CAH. CALC4 is the non-member manager of Citadel Securities. CSGP is the general partner of CALC4. Mr. Griffin is the President and Chief Executive Officer of CGP, and owns a controlling interest in

CGP and CSGP. Citadel Advisors, CAH and CGP each reported shared voting and shared dispositive power over 7,606,069 Common Shares. Citadel Securities, CALC4 and CSGP each reported shared voting and shared dispositive power over 345,182 Common Shares. Mr. Griffin reported shared voting and shared dispositive power over 7,951,251 Common Shares. The address of each of the Reporting Persons is 830 Brickell Plaza, Miami, Florida 33131.

Security Ownership of Certain Beneficial Owners

As of February 9, 2026, other than as disclosed, the Company is not aware of any persons that beneficially own more than 5% of its outstanding Common Shares who does not serve as an executive officer or director of the Company.

No Hedging or Other Speculative Transactions by Employees, Officers and Directors

The Company’s Insider Trading Policy (as described under “Corporate Governance–Insider Trading Policy” below) prohibits employees, officers and directors of the Company or their designees from engaging in hedging and other speculative transactions involving the Company’s securities, including buying the Company’s securities on margin, short-selling, trading in puts or calls or similar arrangements that results in a gain only if the value of the Company’s securities declines in the future. The Company’s policy applies to, among other securities, Company securities granted to employees, officers or directors as compensation, as well as securities held, directly or indirectly, by such employees, officers or directors.

Change in Control Arrangements

As of February 9, 2026, there are no arrangements known to us that would result in a change in control of the Company. We are not, to the best of our knowledge, directly or indirectly owned or controlled by another corporation or foreign government.

FINANCIAL STATEMENTS

The audited financial statements of the Company for the fiscal year ended June 30, 2025, report of the auditor and related management discussion and analysis, all of which may be obtained from SEDAR+ at www.sedarplus.com or from EDGAR at www.sec.gov, will be placed before the Meeting and have been filed with the securities commissions or similar regulatory authority in British Columbia, Alberta, Saskatchewan, Ontario and New Brunswick.

PARTICULARS OF MATTERS TO BE ACTED UPON

I AND II – NUMBER AND ELECTION OF DIRECTORS

Directors of the Company are elected at each annual general meeting of shareholders and hold office until the next annual general meeting of shareholders or until that person sooner ceases to be a director. Currently, the Board consists of seven directors whose terms expire at the Meeting. David C. Beling, a director since 2011, has not been nominated by the Board to stand for re-election at the Meeting, and we thank him for nearly 15 years of service. Accordingly, the shareholders will be asked to pass an ordinary resolution to set the number of directors of the Company at six for the next year, subject to any increases permitted by the Company’s Articles. The number of directors will be approved if the affirmative vote of at least a majority of Common Shares present or represented by proxy at the Meeting and entitled to vote thereat are voted in favor of setting the number of directors at six. Management recommends a vote “FOR” in respect of the resolution to set the number of directors of the Company at six.

Unless you provide other instructions, the proxy will be voted for the nominees listed below. Management does not expect that any of the nominees will be unable to serve as a director. If before the Meeting any vacancies occur in the slate of nominees listed below, the person named in the proxy will exercise his or her discretionary authority to vote the Common Shares represented by the proxy for the election of another person or persons as directors to fill such vacancies.

The following are the Company’s six directors that are up for election at the Meeting. Management has nominated each of the persons named in the table below for election as director. The information concerning current directors and proposed nominees has been furnished by each of them:

Name and Address

SEC Form DEF 14A filed by NioCorp Developments Ltd.