# EDGAR Filing Document

**Accession Number:** 0001512228
**File Stem:** 0001539497-25-002583
**Filing Date:** 2025-10
**Character Count:** 56859
**Document Hash:** 1e0da9f814a47f334d8ea17b9bf9e6fd
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001539497-25-002583.hdr.sgml**: 20251001

**ACCESSION NUMBER**: 0001539497-25-002583

**CONFORMED SUBMISSION TYPE**: S-8

**PUBLIC DOCUMENT COUNT**: 45

**FILED AS OF DATE**: 20251001

**DATE AS OF CHANGE**: 20251001

**EFFECTIVENESS DATE**: 20251001

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** NIOCORP DEVELOPMENTS LTD
- **CENTRAL INDEX KEY:** 0001512228
- **STANDARD INDUSTRIAL CLASSIFICATION:** METAL MINING [1000]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 000000000
- **STATE OF INCORPORATION:** A1
- **FISCAL YEAR END:** 0630

**FILING VALUES:**
- **FORM TYPE:** S-8
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-290671
- **FILM NUMBER:** 251365203

**BUSINESS ADDRESS:**
- **STREET 1:** 7000 S. YOSEMITE STREET
- **STREET 2:** STE. 115
- **CITY:** CENTENNIAL
- **STATE:** CO
- **ZIP:** 80112
- **BUSINESS PHONE:** 720-639-4647

**MAIL ADDRESS:**
- **STREET 1:** 7000 S. YOSEMITE STREET
- **STREET 2:** STE. 115
- **CITY:** CENTENNIAL
- **STATE:** CO
- **ZIP:** 80112

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** QUANTUM RARE EARTH DEVELOPMENTS CORP.
- **DATE OF NAME CHANGE:** 20110204

As filed with the Securities and Exchange Commission on October 1, 2025

Registration No. 333-

**UNITED STATES**<br> **SECURITIES AND EXCHANGE COMMISSION**

**WASHINGTON, D.C. 20549**

**FORM S-8**

**REGISTRATION STATEMENT<br> UNDER THE SECURITIES ACT OF 1933**

**NIOCORP DEVELOPMENTS LTD.** 

(Exact name of Registrant as specified in its charter)

---

| | |
|:---|:---|
| &nbsp;&nbsp;**British Columbia, Canada** | &nbsp;&nbsp;**98-1262185** |
| &nbsp;&nbsp;(State or other jurisdiction of Incorporation or organization) | &nbsp;&nbsp;(I.R.S. Employer Identification No.) |
| &nbsp;&nbsp;**7000 South Yosemite Street, Suite 115** <br> **Centennial, Colorado** <br> (Address of Principal Executive Offices)  | &nbsp;&nbsp;**80112** <br> (Zip Code)  |

---

**NIOCORP DEVELOPMENTS LTD. LONG TERM INCENTIVE PLAN** 

(Full title of the plan)

**CT Corporation**<br> **28 Liberty Street**<br> **Floor 42**<br> **New York, New York 10005** 

(Name and address of agent for service)

**(212) 894-8940** 

(Telephone number, including area code, of agent for service)

***Copies to:***

**Christopher M. Kelly**<br> **Andrew C. Thomas**<br> **Andrew D. Iammarino**<br> **Jones Day**<br> **North Point**<br> **901 Lakeside Avenue**<br> **Cleveland, Ohio 44114**<br> **(216) 586-3939**

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act.

---

| | | | |
|:---|:---|:---|:---|
| &nbsp;&nbsp;Large accelerated filer | &nbsp;&nbsp;☐ | &nbsp;&nbsp;Accelerated filer | &nbsp;&nbsp;☐ |
| &nbsp;&nbsp;Non-accelerated filer | &nbsp;&nbsp;☒ |  |  |
|  |  | &nbsp;&nbsp;Smaller reporting company | &nbsp;&nbsp;☒ |
|  |  | &nbsp;&nbsp;Emerging growth company | &nbsp;&nbsp;☐ |

---

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐

**EXPLANATORY NOTE**

This Registration Statement on Form S-8 ("***Registration Statement***") has been filed pursuant to the requirements of General Instruction E to Form S-8 for the purpose of effecting the registration under the Securities Act of 1933 (the "***Securities Act***") of an additional 17,574,785 Common Shares, without par value ("***Common Shares***"), of NioCorp Developments Ltd., a company incorporated under the laws of British Columbia, Canada (the "***Registrant***"), under the NioCorp Developments Ltd. Long Term Incentive Plan (as amended or amended and restated to date, the "***Plan***"), for which a previously filed registration statement on Form S-8 relating to the Plan is effective. Except to the extent supplemented, amended or superseded by the information set forth herein, the contents of the Registrant's Registration Statement on Form S-8 (Registration No. 333-222313) filed on December 27, 2017, including all attachments and exhibits thereto, are incorporated herein by reference.

**PART II<br>INFORMATION REQUIRED IN THE REGISTRATION STATEMENT**

**Item 3. Incorporation of Documents by Reference.**

The Registrant is subject to the informational and reporting requirements of Sections 13(a), 13(c), 14 and 15(d) of the Securities Exchange Act of 1934, as amended (the "***Exchange Act***"), and, in accordance therewith, files reports, proxy statements and other information with the Securities and Exchange Commission (the "***Commission***"). The following documents, which are on file with the Securities and Exchange Commission , are incorporated in this Registration Statement by reference:

&nbsp;&nbsp;&nbsp;&nbsp;(a) the
 Registrant's Annual Report on Form 10-K for the fiscal year ended June 30, 2025
 (Commission File No. 001-41655), filed with the Commission on [September 11, 2025](http://www.sec.gov/Archives/edgar/data/0001512228/000153949725002331/n2574_x280-10k.htm) ;

&nbsp;&nbsp;&nbsp;&nbsp;(b) the
 Registrant's Current Reports on Form 8-K (Commission File No. 001-41655), filed
 with the Commission on [July 18, 2025](http://www.sec.gov/Archives/edgar/data/0001512228/000153949725001918/n2574_x266-8k.htm) , [July 23, 2025](http://www.sec.gov/Archives/edgar/data/0001512228/000153949725001956/n2574_x267-8k.htm) , [August 4, 2025](http://www.sec.gov/Archives/edgar/data/0001512228/000153949725002009/n2574_x268-8k.htm) , [August 6, 2025](http://www.sec.gov/Archives/edgar/data/0001512228/000153949725002036/n2574_x269-8k.htm) , [August 12, 2025](http://www.sec.gov/Archives/edgar/data/0001512228/000153949725002097/n2574_x270-8k.htm) , [September 19, 2025](http://www.sec.gov/Archives/edgar/data/0001512228/000153949725002417/n2574_x286-8k.htm) and [September 29, 2025](http://www.sec.gov/Archives/edgar/data/0001512228/000153949725002527/n2574_x289-8k.htm) ; and

&nbsp;&nbsp;&nbsp;&nbsp;(c) the description of the Common Shares contained in Registrant's registration statement on Form 8-A, filed with the Commission
on [March 17, 2023](http://www.sec.gov/Archives/edgar/data/1512228/000153949723000456/n2574_x102-8a12b.htm) , as amended by the description of the Common Shares contained in Exhibit 4.37 to the Registrant's Annual
Report on Form 10-K for the fiscal year ended June 30, 2025 (Commission File No. 001-41655), filed September
11, 2025 , as amended by any subsequently filed amendments and reports filed for the purpose of updating that description.

All documents filed by the Registrant with the Commission pursuant to Sections 13(a), 13(c), 14 and 15(d) of the Exchange Act (excluding information deemed to be furnished and not filed with the Commission) subsequent to the effective date of this Registration Statement and prior to the filing of a post-effective amendment that indicates that all securities offered have been sold or that deregisters all securities then remaining unsold, will be deemed to be incorporated by reference in this Registration Statement and to be part hereof from the date of filing of such documents. Any statement contained in any document incorporated or deemed to be incorporated by reference herein will be deemed to be modified or superseded for purposes of this Registration Statement to the extent that a statement contained herein or in any other subsequently filed document that also is or is deemed to be incorporated by reference herein modifies or supersedes such statement. Any such statement so modified or superseded will not be deemed, except as modified or superseded, to constitute a part of this Registration Statement.

**Item 6. Indemnification of Directors and Officers.**

The corporate laws of British Columbia allow the Registrant, and its corporate articles require it (subject to the provisions of the Business Corporations Act (the "***BCBCA***") noted below), to indemnify its directors, former directors, alternate directors and their heirs and legal personal representatives against all eligible penalties to which such person is or may be liable, and the Registrant must, after the final disposition of an eligible proceeding, pay the expenses actually and reasonably incurred by such person in respect of that proceeding. Each director and alternate director is deemed to have contracted with the Registrant on the terms of the indemnity contained in the Registrant's articles.

For the purposes of such an indemnification:

● "associated corporation" means a corporation or entity referred to in paragraph (2) or (3) of the definition of "eligible party";

● "eligible party" in relation to the Registrant, means an individual who:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1) is
 or was a director or officer of the Registrant;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2) is
 or was a director or officer of another corporation:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) at
 a time when the corporation is or was an affiliate of the Registrant; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(ii) at
 the request of the Registrant; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(3) at
 the request of the Registrant, is or was, or holds or held a position equivalent to that
 of, a director or officer of a partnership, trust, joint venture or other unincorporated
 entity; and includes, except in the definition of "eligible proceeding" and
 certain other cases, the heirs and personal or other legal representatives of that individual.

● "eligible penalty" means a judgment, penalty or fine awarded or imposed in, or an amount paid in settlement of, an eligible proceeding;

● "eligible proceeding" means a proceeding in which an eligible party or any of the heirs and personal or other legal representatives of the eligible party, by reason of the eligible party being or having been a director or officer of, or holding or having held a position equivalent to that of a director or officer of, the Registrant or an associated corporation:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1) is
 or may be joined as a party; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2) is
 or may be liable for or in respect of a judgment, penalty or fine in, or expenses related
 to, the proceeding;

● "expenses" includes costs, charges and expenses, including legal and other fees, but does not include judgments, penalties, fines or amounts paid in settlement of a proceeding; and

● "proceeding" includes any legal proceeding including a civil, criminal, quasi-criminal, administrative or regulatory action or proceedings; or investigative action, whether current, threatened, pending or completed.

In addition, under the BCBCA, the Registrant may pay, as they are incurred in advance of the final disposition of an eligible proceeding, the expenses actually and reasonably incurred by an eligible party in respect of that proceeding, provided that the Registrant first receives from the eligible party a written undertaking that, if it is ultimately determined that the payment of expenses is prohibited by the restrictions noted below, the eligible party will repay the amounts advanced.

Notwithstanding the provisions of the Registrant's articles noted above, the Registrant must not indemnify an eligible party or pay the expenses of an eligible party, if any of the following circumstances apply:

● if the indemnity or payment is made under an earlier agreement to indemnify or pay expenses and, at the time that the agreement to indemnify or pay expenses was made, the Registrant was prohibited from giving the indemnity or paying the expenses by its memorandum or articles;

● if the indemnity or payment is made otherwise than under an earlier agreement to indemnify or pay expenses and, at the time that the indemnity or payment is made, the Registrant is prohibited from giving the indemnity or paying the expenses by its memorandum or articles;

● if, in relation to the subject matter of the eligible proceeding, the eligible party did not act honestly and in good faith with a view to the best interests of the Registrant or the associated corporation, as the case may be; or

● in the case of an eligible proceeding other than a civil proceeding, if the eligible party did not have reasonable grounds for believing that the eligible party's conduct in respect of which the proceeding was brought was lawful.

In addition, if an eligible proceeding is brought against an eligible party by or on behalf of the Registrant or by or on behalf of an associated corporation, the Registrant must not do either of the following:

● indemnify the eligible party under Section 160(a) of the BCBCA in respect of the proceeding; or

● pay the expenses of the eligible party in respect of the proceeding.

Notwithstanding any of the foregoing, and whether or not payment of expenses or indemnification has been sought, authorized or declined under the BCBCA or the articles of the Registrant, on the application of the Registrant or an eligible party, the Supreme Court of British Columbia may do one or more of the following:

● order the Registrant to indemnify an eligible party against any liability incurred by the eligible party in respect of an eligible proceeding;

● order the Registrant to pay some or all of the expenses incurred by an eligible party in respect of an eligible proceeding;

● order the enforcement of, or any payment under, an agreement of indemnification entered into by the Registrant;

● order the Registrant to pay some or all of the expenses actually and reasonably incurred by any person in obtaining an order under Section 164 of the BCBCA; or

● make any other order the court considers appropriate.

Furthermore, the Registrant has entered into an indemnification agreement with each of its directors and executive officers. The indemnification agreements provide that the Registrant will, to the fullest extent possible under applicable law, subject to other specified limitations, indemnify and hold harmless the directors and executive officers against any and all costs and expenses reasonably incurred for, or in connection with, any civil, criminal, administrative, investigative or other proceeding, whether threatened, pending, continuing or completed, including but not limited to any act, matter, deed or thing whatsoever made, done, committed, permitted or acquiesced in.

**Item 8. Exhibits.**

---

| | |
|:---|:---|
| &nbsp;&nbsp;**Exhibit** <br> **Number**  | &nbsp;&nbsp;**Description**  |
| &nbsp;&nbsp;[4.1(1)](http://www.sec.gov/Archives/edgar/data/1512228/000114420416114498/filename2.htm) | &nbsp;&nbsp;[Notice of Articles of NioCorp Developments Ltd. dated April 5, 2016](http://www.sec.gov/Archives/edgar/data/1512228/000114420416114498/filename2.htm) |
| &nbsp;&nbsp;[4.2(1)](http://www.sec.gov/Archives/edgar/data/1512228/000114420416114498/filename3.htm) | &nbsp;&nbsp;[Articles of NioCorp Developments Ltd., as amended, effective as of January 27, 2015](http://www.sec.gov/Archives/edgar/data/1512228/000114420416114498/filename3.htm) |
| &nbsp;&nbsp;[4.3(2)](http://www.sec.gov/Archives/edgar/data/1512228/000153949723000458/exh3-1.htm) | &nbsp;&nbsp;[Amendment to Articles, effective March 17, 2023](http://www.sec.gov/Archives/edgar/data/1512228/000153949723000458/exh3-1.htm) |
| &nbsp;&nbsp;[4.4(3)](http://www.sec.gov/Archives/edgar/data/1512228/000178598220000953/sf0045h_ex10-1.htm) | &nbsp;&nbsp;[NioCorp Developments Ltd. Long Term Incentive Plan, as amended](http://www.sec.gov/Archives/edgar/data/1512228/000178598220000953/sf0045h_ex10-1.htm) |
| &nbsp;&nbsp;[5.1](exh5-1.htm) | &nbsp;&nbsp;[Opinion of Blakes, Cassels & Graydon LLP](exh5-1.htm) |
| &nbsp;&nbsp;[23.1](exh5-1.htm) | &nbsp;&nbsp;[Consent of Blakes, Cassels & Graydon LLP (included in Exhibit 5.1)](exh5-1.htm) |
| &nbsp;&nbsp;[23.2](exh23-2.htm) | &nbsp;&nbsp;[Consent of Deloitte & Touche LLP](exh23-2.htm) |
| &nbsp;&nbsp;[23.3](exh23-3.htm) | &nbsp;&nbsp;[Consent of Dahrouge Geological Consulting USA Ltd.](exh23-3.htm) |
| &nbsp;&nbsp;[23.4](exh23-4.htm) | &nbsp;&nbsp;[Consent of Understood Mineral Resources Ltd.](exh23-4.htm) |
| &nbsp;&nbsp;[23.5](exh23-5.htm) | &nbsp;&nbsp;[Consent of Optimize Group Inc.](exh23-5.htm) |
| &nbsp;&nbsp;[23.6](exh23-6.htm) | &nbsp;&nbsp;[Consent of Tetra Tech](exh23-6.htm) |
| &nbsp;&nbsp;[23.7](exh23-7.htm) | &nbsp;&nbsp;[Consent of Adrian Brown Consultants Inc.](exh23-7.htm) |
| &nbsp;&nbsp;[23.8](exh23-8.htm) | &nbsp;&nbsp;[Consent of Magemi Mining Inc.](exh23-8.htm) |
| &nbsp;&nbsp;[23.9](exh23-9.htm) | &nbsp;&nbsp;[Consent of L3 Process Development](exh23-9.htm) |
| &nbsp;&nbsp;[23.10](exh23-10.htm) | &nbsp;&nbsp;[Consent of Olsson](exh23-10.htm) |
| &nbsp;&nbsp;[23.11](exh23-11.htm) | &nbsp;&nbsp;[Consent of A2GC](exh23-11.htm) |

---

---

| | |
|:---|:---|
| &nbsp;&nbsp;[23.12](exh23-12.htm) | &nbsp;&nbsp;[Consent of Metallurgy Concept Solutions](exh23-12.htm) |
| &nbsp;&nbsp;[23.13](exh23-13.htm) | &nbsp;&nbsp;[Consent of Scott Honan, M.Sc., SME-RM, NioCorp](exh23-13.htm) |
| &nbsp;&nbsp;[23.14](exh23-14.htm) | &nbsp;&nbsp;[Consent of Dumas Contracting Ltd.](exh23-14.htm) |
| &nbsp;&nbsp;[23.15](exh23-15.htm) | &nbsp;&nbsp;[Consent of Mahmood Khwaja, P.E., CDM Smith](exh23-15.htm) |
| &nbsp;&nbsp;[23.16](exh23-16.htm) | &nbsp;&nbsp;[Consent of Wynand Marx, M.Eng., BBE Consulting](exh23-16.htm) |
| &nbsp;&nbsp;24.1 | &nbsp;&nbsp;Power of Attorney (contained on the signature page of this Registration Statement) |
| &nbsp;&nbsp;[107](n2574-x290_ex107.htm) | &nbsp;&nbsp;[Filing Fee Table](n2574-x290_ex107.htm) |

---

(1) Previously
 filed as an exhibit to the Registrant's Draft Registration Statement on Form S-1
 (Registration No. 377-01354) filed with the Commission on July 26, 2016 and incorporated
 herein by reference.

(2) Previously
 filed as an exhibit to the Company's Current Report on Form 8-K (File No. 001-41655)
 filed with the Commission on March 17, 2023 and incorporated herein by reference.

(3) Previously
 filed as an exhibit to the Registrant's Current Report on Form 8-K (File No. 001-41655)
 filed with the Commission on January 22, 2024 and incorporated herein by reference.

**Item 9. Undertakings.**

&nbsp;&nbsp;&nbsp;&nbsp;(a) The
 undersigned Registrant hereby undertakes:

&nbsp;&nbsp;&nbsp;&nbsp;(1) To
 file, during any period in which offers or sales are being made, a post-effective amendment
 to this Registration Statement:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) To
 include any prospectus required by Section 10(a)(3) of the Securities Act;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(ii) To
 reflect in the prospectus any facts or events arising after the effective date of the
 Registration Statement (or the most recent post-effective amendment thereof) which, individually
 or in the aggregate, represent a fundamental change in the information set forth in the
 Registration Statement. Notwithstanding the foregoing, any increase or decrease in volume
 of securities offered (if the total dollar value of securities offered would not exceed
 that which was registered) and any deviation from the low or high end of the estimated
 maximum offering range may be reflected in the form of prospectus filed with the Commission
 pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent
 no more than a 20% change in the maximum aggregate offering price set forth in the "Calculation
 of Filing Fee Tables" or "Calculation of Registration Fee" table, as
 applicable, in the effective Registration Statement; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iii) To
 include any material information with respect to the plan of distribution not previously
 disclosed in the Registration Statement or any material change to such information in
 the Registration Statement;

*Provided*, *however*, that paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the Commission by the Registrant pursuant to Section 13 or Section 15(d) of the Exchange Act that are incorporated by reference in the Registration Statement.

&nbsp;&nbsp;&nbsp;&nbsp;(2) That,
 for the purpose of determining any liability under the Securities Act, each such post-effective
 amendment shall be deemed to be a new registration statement relating to the securities
 offered therein, and the offering of such securities at that time shall be deemed to
 be the initial *bona fide* offering thereof.

&nbsp;&nbsp;&nbsp;&nbsp;(3) To
 remove from registration by means of a post-effective amendment any of the securities
 being registered which remain unsold at the termination of the offering.

&nbsp;&nbsp;&nbsp;&nbsp;(b) That
 for purposes of determining any liability under the Securities Act, each filing of the
 Registrant's annual report pursuant to Section 13(a) or Section 15(d) of the Exchange
 Act (and, where applicable, each filing of an employee benefit plan's annual report
 pursuant to section 15(d) of the Exchange Act) that is incorporated by reference in the
 registration statement shall be deemed to be a new registration statement relating to
 the securities offered therein, and the offering of such securities at that time shall
 be deemed to be the initial *bona fide* offering thereof.

&nbsp;&nbsp;&nbsp;&nbsp;(c) Insofar
 as indemnification for liabilities arising under the Securities Act may be permitted
 to directors, officers and controlling persons of the Registrant pursuant to the foregoing
 provisions, or otherwise, the Registrant has been advised that in the opinion of the
 Commission such indemnification is against public policy as expressed in the Securities
 Act and is, therefore, unenforceable. In the event that a claim for indemnification against
 such liabilities (other than the payment by the Registrant of expenses incurred or paid
 by a director, officer or controlling person of the Registrant in the successful defense
 of any action, suit or proceeding) is asserted by such director, officer or controlling
 person in connection with the securities being registered, the Registrant will, unless
 in the opinion of its counsel the matter has been settled by controlling precedent, submit
 to a court of appropriate jurisdiction the question of whether such indemnification by
 it is against public policy as expressed in the Securities Act and will be governed by
 the final adjudication of such issue.

**SIGNATURES**

Pursuant to the requirements of the Securities Act, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Centennial, State of Colorado, on October 1, 2025.

---

| | |
|:---|:---|
| **NIOCORP DEVELOPMENTS LTD.** | **NIOCORP DEVELOPMENTS LTD.** |
| By: | /s/ Mark A. Smith |

---

Name: Mark A. Smith <br> Title: President and Chief Executive Officer <br> (Principal Executive Officer)

Pursuant to the requirements of the Securities Act, this Registration Statement has been signed by the following persons in the capacities and on the date indicated.

KNOW ALL PERSONS BY THESE PRESENTS, that each of the directors and officers of the Registrant whose signature appears below constitutes and appoints Mark A. Smith and Neal Shah, or either of them, as true and lawful attorneys-in-fact and agents with full power of substitution and re-substitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign (1) one or more registration statements on Form S-8, or other appropriate form (the "***Other Registration Statement***") with respect to the registration under the Securities Act of Common Shares issuable pursuant to the Plan, (2) this Registration Statement and any or all amendments to said Registration Statement or the Other Registration Statement (including post-effective amendments and other registration statements filed pursuant to Rule 462 and otherwise), and (3) any and all applications or other documents to be filed with the Commission or any state securities commission or other regulatory authority with respect to the securities covered by the Registration Statement or the Other Registration Statement, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Commission or otherwise, granting unto said attorneys-in-fact and agents the full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the foregoing, as to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them, or his or her substitute, may lawfully do or cause to be done by virtue hereof.

---

| | | |
|:---|:---|:---|
| **Signature**  | &nbsp;&nbsp;**Title**  | &nbsp;&nbsp;**Date**  |
| /s/ Mark A. Smith <br> Mark A. Smith  | &nbsp;&nbsp;President, Chief Executive Officer (Principal Executive Officer and Authorized U.S. Representative) and Chairman of the Board of Directors | &nbsp;&nbsp;October 1, 2025 |
| /s/ Neal Shah <br> Neal Shah<br>| &nbsp;&nbsp;Chief Financial Officer (Principal Financial and Accounting Officer) | &nbsp;&nbsp;October 1, 2025 |
| /s/ Anthony W. Fulton <br> Anthony W. Fulton<br>| &nbsp;&nbsp;Director | &nbsp;&nbsp;October 1, 2025 |
| /s/ David C. Beling <br> David C. Beling<br>| &nbsp;&nbsp;Director | &nbsp;&nbsp;October 1, 2025 |
| /s/ Nilsa Guerrero-Mahon <br> Nilsa Guerrero-Mahon<br>| &nbsp;&nbsp;Director | &nbsp;&nbsp;October 1, 2025 |
| /s/ Peter Oliver <br> Peter Oliver<br>| &nbsp;&nbsp;Director | &nbsp;&nbsp;October 1, 2025 |
| /s/ Dean C. Kehler <br> Dean C. Kehler<br>| &nbsp;&nbsp;Director | &nbsp;&nbsp;October 1, 2025 |
| /s/ Michael G. Maselli  | &nbsp;&nbsp;Director | &nbsp;&nbsp;October 1, 2025 |

---

&nbsp;&nbsp;Michael G. Maselli

## Exhibit 5.1

---

| | |
|:---|:---|
| ![](n2574s8img001.jpg) | ![](n2574s8img002.jpg) |

---

---

| | |
|:---|:---|
| October 1, 2025 | **Exhibit 5.1** |

---

NioCorp Developments Ltd.<br> 7000 South Yosemite Street, Suite115

Centennial, CO

80112

---

| | |
|:---|:---|
| **RE:** | **NioCorp Developments Ltd. – Registration Statement on Form S-8** |

---

Dear Sirs/Mesdames:

We have acted as Canadian counsel to NioCorp Developments Ltd., a corporation incorporated under the laws of the Province of British Columbia (the "**Company**"), in connection with the preparation and filing by the Company with the United States Securities and Exchange Commission (the "**Commission**") on the date hereof of the above captioned registration statement on Form S-8 (the "**Registration Statement**") pursuant to the United States Securities Act of 1933, as amended (the "**Act**"). We understand that the purpose of the Registration Statement is to register a total of 17,574,785 common shares without par value of the Company (the "**Shares**"), which are issuable pursuant to the exercise of stock options or the settlement of restricted share units, performance share units or other applicable awards (collectively, the "**Awards**") which have or may be granted under the NioCorp Developments Ltd. Long Term Incentive Plan, as approved by the board of directors of the Company on September 29, 2017, as amended on September 24, 2020 and as further amended on December 4, 2023, and by the Company's shareholders on November 9, 2017, as amended on November 4, 2020 and as further amended on January 19, 2024 (the "**Plan**").

In connection with the preparation of the Registration Statement and this opinion, we have examined, considered and relied upon originals or copies certified to our satisfaction of each of the following documents (collectively, the "**Documents**"):

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) the
 Company's Articles and Notice of Articles;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) records
 of corporate proceedings of the Company approving the reservation and issuance of the
 Shares and the Plan;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) the
 Plan; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d) such
 other documents, statutes, regulations, public and corporate records as we have deemed
 appropriate to give this opinion.

We have relied upon the factual matters contained in the representations and other factual statements of the Company made in the Documents and upon certificates of public officials and the officers of the Company.

In such examination, we have assumed without any independent investigation: (a) the genuineness of all signatures, the legal capacity of natural persons, the authenticity and completeness of all documents submitted to us as originals, the conformity to original documents of all documents submitted to us as duplicates or certified or conformed copies, and the authenticity of the originals of all such latter documents; and (b) that each of the

![](n2574s8img003.jpg)

---

| | |
|:---|:---|
| ![](n2574s8img001.jpg) | Page 2 |

---

parties (other than the Company) executing any of the Documents has duly and validly executed and delivered each of the Documents to which such party is a signatory, and the obligations of each party (other than the Company) set forth therein are legal, valid and binding and are enforceable in accordance with all stated terms. We have not, however, undertaken any independent investigation as to any factual matter set forth in any of the foregoing and as to questions of fact in respect of the opinions hereinafter expressed, we have relied solely upon the Documents.

On the basis of and subject to the foregoing and the other assumptions and qualifications set forth herein, and provided that all necessary corporate action has been taken by the Company to authorize the issuance of the Awards, we are of the opinion that the Shares to be issued upon exercise or settlement, as applicable, of the Awards issued pursuant to the Plan and the authorized forms of award agreements thereunder (the "**Award Agreements**"), if and when issued in accordance with the terms and conditions of the Plan and the Award Agreements, will be validly issued as fully paid and non-assessable shares in the capital of the Company.

This opinion is limited to the matters stated herein, and no opinions may be implied or inferred beyond the matters expressly stated herein. The opinions expressed herein are as of the date hereof, and we assume no obligation to update or supplement such opinions to reflect any facts or circumstances that may hereafter come to our attention or any changes in law that may hereafter occur.

We do not express any opinion with respect to the laws of any jurisdiction other than the Province of British Columbia and the federal laws of Canada applicable therein, in each case, in effect on the date hereof. We express no opinion with respect to the laws of any other jurisdiction.

We hereby consent to the filing of this opinion letter as an exhibit to the Registration Statement and to the reference to Blake, Cassels & Graydon LLP therein. In giving this consent, we do not thereby admit that we are in the category of persons whose consent is required under Section 7 of the Act, or the rules and regulations of the Commission promulgated thereunder.

Very truly yours,

/s/ Blake, Cassels & Graydon LLP

![](n2574s8img003.jpg)

## Exhibit 23.2

**Exhibit 23.2**

**CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM**

We consent to the incorporation by reference in this Registration Statement on Form S-8 of our report dated September 11, 2025 relating to the financial statements of NioCorp Developments Ltd., appearing in the Annual Report on Form 10-K of NioCorp Developments Ltd. for the year ended June 30, 2025. We also consent to the reference to us under the heading "Experts" in such Registration Statement.

 

*/s/ DELOITTE & TOUCHE LLP*

Denver, Colorado

October 1, 2025

## Exhibit 23.3

**Exhibit 23.3**

![](n2574s8img005.jpg)

**CONSENT OF QUALIFIED PERSON**

Dahrouge Geological Consulting USA Ltd. hereby consents to the incorporation by reference of Sections 1.1 to 1.5, 1.9 to 1.11, 2 to 6, 7.1 to 7.2, 8, 9.2, 9.3, 16, 18 to 21, 22.1, 22.3, 22.9 to 22.12, 23.1.1, and 23.1.9 (the "Covered Sections") of the Technical Report Summary titled "Technical Report Summary, Elk Creek Project, Nebraska" with an Effective Date of June 30, 2022 (the "Technical Report Summary") in this Registration Statement on Form S-8 and any and all amendments and supplements thereto (the "Registration Statement") of NioCorp Developments Ltd. (the "Company").

Dahrouge Geological Consulting USA Ltd. also consents to the use of and references to our name, including our status as an expert or "qualified person" (as defined in Subpart 1300 of Regulation S-K promulgated by the U.S. Securities and Exchange Commission), in connection with the Registration Statement and the Technical Report Summary.

Dahrouge Geological Consulting USA Ltd. also consents to any extracts from or a summary of the Covered Sections in the Registration Statement (the "Disclosure").

Dahrouge Geological Consulting USA Ltd. certifies that we have read the Disclosure being filed by the Company and that it fairly and accurately represents the information in the Covered Sections.

Signed and dated this 1st day of October 2025 at Centennial, Colorado.

---

| |
|:---|
| &nbsp;&nbsp; /s/ Trevor Mills  |
| &nbsp;&nbsp;Trevor Mills, P.G., SME-RM<br> Senior Geologist I US Operations Manager<br> Dahrouge Geological Consulting USA Ltd. |

---

## Exhibit 23.4

**Exhibit 23.4**

![](n2574s8img015.jpg)

**CONSENT OF QUALIFIED PERSON**

Understood Mineral Resources Ltd. hereby consents to the incorporation by reference of Sections 1.6, 9.1, 11 and 22.2 (the "Covered Sections") of the Technical Report Summary titled "Technical Report Summary, Elk Creek Project, Nebraska" with an Effective Date of June 30, 2022 (the "Technical Report Summary") in this Registration Statement on Form S-8 and any and all amendments and supplements thereto (the "Registration Statement") of NioCorp Developments Ltd. (the "Company").

Understood Mineral Resources Ltd. also consents to the use of and references to our name, including our status as an expert or "qualified person" (as defined in Subpart 1300 of Regulation S-K promulgated by the U.S. Securities and Exchange Commission), in connection with the Registration Statement and the Technical Report Summary.

Understood Mineral Resources Ltd. also consents to any extracts from or a summary of the Covered Sections in the Registration Statement (the "Disclosure").

Understood Mineral Resources Ltd. certifies that we have read the Disclosure being filed by the Company and that it fairly and accurately represents the information in the Covered Sections.

Signed and dated this 1st day of October 2025 at 22 Middleton Crescent, Saskatoon, Saskatchewan, Canada.

---

| |
|:---|
| &nbsp;&nbsp; /s/ Matt Batty  |
| &nbsp;&nbsp;Matt Batty, P.Geo<br> Owner and Geostatistican<br> Understood Mineral Resources Ltd. |

---

## Exhibit 23.5

**Exhibit 23.5**

![](n2574s8img012.jpg)

**CONSENT OF QUALIFIED PERSON**

Optimize Group Inc. hereby consents to the incorporation by reference of Sections 1.7, 12, 13.3 to 13.5, 15.7, 22.5 and 23.1.4 (the "Covered Sections") of the Technical Report Summary titled "Technical Report Summary, Elk Creek Project, Nebraska" with an Effective Date of June 30, 2022 (the "Technical Report Summary") in this Registration Statement on Form S-8 and any and all amendments and supplements thereto (the "Registration Statement") of NioCorp Developments Ltd. (the "Company").

Optimize Group Inc. also consents to the use of and references to our name, including our status as an expert or "qualified person" (as defined in Subpart 1300 of Regulation S-K promulgated by the U.S. Securities and Exchange Commission), in connection with the Registration Statement and the Technical Report Summary.

Optimize Group Inc. also consents to any extracts from or a summary of the Covered Sections in the Registration Statement (the "Disclosure").

Optimize Group Inc. certifies that we have read the Disclosure being filed by the Company and that it fairly and accurately represents the information in the Covered Sections.

Signed and dated this 29th day of September 2025 at Toronto, Ontario, Canada.

---

| |
|:---|
| &nbsp;&nbsp; /s/ Gavin Clow  |
| &nbsp;&nbsp;Gavin Clow, P.Eng.<br> Mining Manager - Canada<br> Optimize Group Inc. |

---

## Exhibit 23.6

**Exhibit 23.6**

![](n2574s8img014.jpg)

**CONSENT OF QUALIFIED PERSON**

Tetra Tech hereby consents to the incorporation by reference of Sections 14.5, 15.1.1, 15.1.2, 15.2 to 15.4, 22.7 and 23.1.6 (the "Covered Sections") of the Technical Report Summary titled "Technical Report Summary, Elk Creek Project, Nebraska" with an Effective Date of June 30, 2022 (the "Technical Report Summary") in this Registration Statement on Form S-8 and any and all amendments and supplements thereto (the "Registration Statement") of NioCorp Developments Ltd. (the "Company").

Tetra Tech also consents to the use of and references to our name, including our status as an expert or "qualified person" (as defined in Subpart 1300 of Regulation S-K promulgated by the U.S. Securities and Exchange Commission), in connection with the Registration Statement and the Technical Report Summary.

Tetra Tech also consents to any extracts from or a summary of the Covered Sections in the Registration Statement (the "Disclosure").

Tetra Tech certifies that we have read the Disclosure being filed by the Company and that it fairly and accurately represents the information in the Covered Sections.

Signed and dated this 1st day of October 2025 at Salt Lake City, Utah.

---

| |
|:---|
| &nbsp;&nbsp; /s/ David R. Winters  |
| &nbsp;&nbsp;David R. Winters, SE, PE<br> Senior Principal Engineer<br> Tetra Tech |

---

## Exhibit 23.7

**Exhibit 23.7**![](adrianbrown.jpg)

**CONSENT OF QUALIFIED PERSON**

Adrian Brown Consultants Inc. hereby consents to the incorporation by reference of Sections 7.4 and 13.2 (the "Covered Sections") of the Technical Report Summary titled "Technical Report Summary, Elk Creek Project, Nebraska" with an Effective Date of June 30, 2022 (the "Technical Report Summary") in this Registration Statement on Form S-8 and any and all amendments and supplements thereto (the "Registration Statement") of NioCorp Developments Ltd. (the "Company").

Adrian Brown Consultants Inc. also consents to the use of and references to our name, including our status as an expert or "qualified person" (as defined in Subpart 1300 of Regulation S-K promulgated by the U.S. Securities and Exchange Commission), in connection with the Registration Statement and the Technical Report Summary.

Adrian Brown Consultants Inc. also consents to any extracts from or a summary of the Covered Sections in the Registration Statement (the "Disclosure").

Adrian Brown Consultants Inc. certifies that we have read the Disclosure being filed by the Company and that it fairly and accurately represents the information in the Covered Sections.

Signed and dated this 1st day of October 2025 at Denver, Colorado, USA.

---

| |
|:---|
| &nbsp;&nbsp; /s/ Adrian Brown |
| &nbsp;&nbsp;Adrian Brown, P.E.<br> Principal Engineer<br> Adrian Brown Consultants Inc. |

---

## Exhibit 23.8

**Exhibit 23.8**

![](n2574s8img008.jpg)

**CONSENT OF QUALIFIED PERSON**

Magemi Mining Inc. hereby consents to the incorporation by reference of Sections 10.1, 14.1.1, 14.2.1, 14.3.1, and 14.4.1 (the "Covered Sections") of the Technical Report Summary titled "Technical Report Summary, Elk Creek Project, Nebraska" with an Effective Date of June 30, 2022 (the "Technical Report Summary") in this Registration Statement on Form S-8 and any and all amendments and supplements thereto (the "Registration Statement") of NioCorp Developments Ltd. (the "Company").

Magemi Mining Inc. also consents to the use of and references to our name, including our status as an expert or "qualified person" (as defined in Subpart 1300 of Regulation S-K promulgated by the U.S. Securities and Exchange Commission), in connection with the Registration Statement and the Technical Report Summary.

Magemi Mining Inc. also consents to any extracts from or a summary of the Covered Sections in the Registration Statement (the "Disclosure").

Magemi Mining Inc. certifies that we have read the Disclosure being filed by the Company and that it fairly and accurately represents the information in the Covered Sections.

Signed and dated this 1st day of October 2025 at North York, Ontario, Canada.

---

| |
|:---|
| &nbsp;&nbsp; /s/ Georgi Doundarov  |
| &nbsp;&nbsp;Georgi Doundarov, M.SC, P.Eng., PMP, CCP<br> CEO<br> Magemi Mining Inc. |

---

## Exhibit 23.9

**Exhibit 23.9**

![](n2574s8img007.jpg)

**CONSENT OF QUALIFIED PERSON**

L3 Process Development hereby consents to the incorporation by reference of Sections 10.2, 10.2.1 to 10.2.3, 14.1.2, 14.1.4, 14.2.2, 14.2.4, 14.3.2, 14.3.4, 14.4.2, 14.4.4, 22.4, 22.6, 23.1.2, and 23.1.5 (the "Covered Sections") of the Technical Report Summary titled "Technical Report Summary, Elk Creek Project, Nebraska" with an Effective Date of June 30, 2022 (the "Technical Report Summary") in this Registration Statement on Form S-8 and any and all amendments and supplements thereto (the "Registration Statement") of NioCorp Developments Ltd. (the "Company").

L3 Process Development also consents to the use of and references to our name, including our status as an expert or "qualified person" (as defined in Subpart 1300 of Regulation S-K promulgated by the U.S. Securities and Exchange Commission), in connection with the Registration Statement and the Technical Report Summary.

L3 Process Development also consents to any extracts from or a summary of the Covered Sections in the Registration Statement (the "Disclosure").

L3 Process Development certifies that we have read the Disclosure being filed by the Company and that it fairly and accurately represents the information in the Covered Sections.

Signed and dated this 1st day of October 2025 at Salt Lake City.

---

| |
|:---|
| &nbsp;&nbsp; /s/ Eric Larochelle  |
| &nbsp;&nbsp;Eric Larochelle Ing.<br> Co-Owner - CEO<br> L3 Process Development |

---

## Exhibit 23.10

**Exhibit 23.10**

![](n2574s8img011.jpg)

**CONSENT OF QUALIFIED PERSON**

Olsson hereby consents to the incorporation by reference of Sections 1.8, 17, 22.8 and 23.1.7 (the "Covered Sections") of the Technical Report Summary titled "Technical Report Summary, Elk Creek Project, Nebraska" with an Effective Date of June 30, 2022 (the "Technical Report Summary") in this Registration Statement on Form S-8 and any and all amendments and supplements thereto (the "Registration Statement") of NioCorp Developments Ltd. (the "Company").

Olsson also consents to the use of and references to our name, including our status as an expert or "qualified person" (as defined in Subpart 1300 of Regulation S-K promulgated by the U.S. Securities and Exchange Commission), in connection with the Registration Statement and the Technical Report Summary.

Olsson also consents to any extracts from or a summary of the Covered Sections in the Registration Statement (the "Disclosure").

Olsson certifies that we have read the Disclosure being filed by the Company and that it fairly and accurately represents the information in the Covered Sections.

Signed and dated this 1st day of October 2025 at Omaha, Nebraska.

---

| |
|:---|
| &nbsp;&nbsp; /s/ Brian Osborn  |
| &nbsp;&nbsp;Brian Osborn<br> Vice President<br> Olsson |

---

## Exhibit 23.11

**Exhibit 23.11**

![](n2574s8img004.jpg)

**CONSENT OF QUALIFIED PERSON**

A2GC hereby consents to the incorporation by reference of Sections 7.3, 13.1 and 23.1.3 (the "Covered Sections") of the Technical Report Summary titled "Technical Report Summary, Elk Creek Project, Nebraska" with an Effective Date of June 30, 2022 (the "Technical Report Summary") in this Registration Statement on Form S-8 and any and all amendments and supplements thereto (the "Registration Statement") of NioCorp Developments Ltd. (the "Company").

A2GC also consents to the use of and references to our name, including our status as an expert or "qualified person" (as defined in Subpart 1300 of Regulation S-K promulgated by the U.S. Securities and Exchange Commission), in connection with the Registration Statement and the Technical Report Summary.

A2GC also consents to any extracts from or a summary of the Covered Sections in the Registration Statement (the "Disclosure").

A2GC certifies that we have read the Disclosure being filed by the Company and that it fairly and accurately represents the information in the Covered Sections.

Signed and dated this 1st day of October 2025 in Montreal, Quebec, Canada.

---

| |
|:---|
| &nbsp;&nbsp; /s/ Patrick Andrieux  |
| &nbsp;&nbsp;Patrick Andrieux, Ph.D., P.Eng., Eng.<br> Principal Engineer<br> A2GC |

---

## Exhibit 23.12

**Exhibit 23.12**

![](n2574s8img010.jpg)

**CONSENT OF QUALIFIED PERSON**

Metallurgy Concept Solutions LLC hereby consents to the incorporation by reference of Sections 10.3, 14.1.3, 14.2.3, 14.3.3, and 14.4.3 (the "Covered Sections") of the Technical Report Summary titled "Technical Report Summary, Elk Creek Project, Nebraska" with an Effective Date of June 30, 2022 (the "Technical Report Summary") in this Registration Statement on Form S-8 and any and all amendments and supplements thereto (the "Registration Statement") of NioCorp Developments Ltd. (the "Company").

Metallurgy Concept Solutions LLC also consents to the use of and references to our name, including our status as an expert or "qualified person" (as defined in Subpart 1300 of Regulation S-K promulgated by the U.S. Securities and Exchange Commission), in connection with the Registration Statement and the Technical Report Summary.

Metallurgy Concept Solutions LLC also consents to any extracts from or a summary of the Covered Sections in the Registration Statement (the "Disclosure").

Metallurgy Concept Solutions LLC certifies that we have read the Disclosure being filed by the Company and that it fairly and accurately represents the information in the Covered Sections.

Signed and dated this 1st day of October 2025 at 306 S. Main Street., Union, Oregon, United States 97883.

---

| |
|:---|
| &nbsp;&nbsp; /s/ Sylvain Harton  |
| &nbsp;&nbsp;Sylvain Harton, P. Eng.<br> Senior Metallurgist Engineer<br> Metallurgy Concept Solutions LLC |

---

## Exhibit 23.13

**Exhibit 23.13**

![](n2574s8img013.jpg)

**CONSENT OF QUALIFIED PERSON**

I, Scott Honan, M.Sc., SME-RM, consent to the incorporation by reference of Sections 13.7.5, 13.7.6, 13.7.7, 13.7.8, 13.7.15, 15.5, 15.6 and 22.7.1 (the "Covered Sections") of the Technical Report Summary titled "Technical Report Summary, Elk Creek Project, Nebraska" with an Effective Date of June 30, 2022 (the "Technical Report Summary") in this Registration Statement on Form S-8 and any and all amendments and supplements thereto (the "Registration Statement") of NioCorp Developments Ltd. (the "Company").

I also consent to the use of and references to my name, including my status as an expert or "qualified person" (as defined in Subpart 1300 of Regulation S-K promulgated by the U.S. Securities and Exchange Commission), in connection with the Registration Statement and the Technical Report Summary.

I also consent to any extracts from or a summary of the Covered Sections in the Registration Statement (the "Disclosure").

I certify that I have read the Disclosure being filed by the Company and that it fairly and accurately represents the information in the Covered Sections.

Signed and dated this 1st day of October 2025 at Centennial, Colorado, USA.

---

| |
|:---|
| &nbsp;&nbsp; /s/ Scott Honan  |
| &nbsp;&nbsp;Scott Honan, M.Sc., SME-RM<br> Chief Operating Officer<br> NioCorp Developments Ltd. |

---

## Exhibit 23.14

**Exhibit 23.14**

![](n2574s8img006.jpg)

**CONSENT OF QUALIFIED PERSON**

Dumas Contracting Ltd. has reviewed, approved and taken responsibility for Sections 13.7.1, 13.7.2, 13.7.3, 13.7.4, 13.7.9, 13.7.10, 13.7.11, 13.7.12, 13.7.13, 13.7.14, 15.1.3, 15.1.4 and 23.1.8 (the "Covered Sections") of the Technical Report Summary titled "Technical Report Summary, Elk Creek Project, Nebraska" with an Effective Date of June 30, 2022 (the "Technical Report Summary"). Dumas Contracting Ltd. hereby consents to the incorporation by reference of the Covered Sections in this Registration Statement on Form S-8 and any and all amendments and supplements thereto (the "Registration Statement") of NioCorp Developments Ltd. (the "Company").

Dumas Contracting Ltd. also consents to the use of and references to our name, including our status as an expert or "qualified person" (as defined in Subpart 1300 of Regulation S-K promulgated by the U.S. Securities and Exchange Commission), in connection with the Registration Statement and the Technical Report Summary.

Dumas Contracting Ltd. also consents to any extracts from or a summary of the Covered Sections in the Registration Statement (the "Disclosure").

Dumas Contracting Ltd. certifies that we have read the Disclosure being filed by the Company and that it fairly and accurately represents the information in the Covered Sections.

Signed and dated this 1st day of October 2025 at Timmins, Ontario, Canada.

---

| |
|:---|
| /s/ Tony Linton |
| Tony Linton, FEC, P.Eng. |
| Director, Engineering & Technical Services |
| Dumas Contracting Ltd. |

---

## Exhibit 23.15

**Exhibit 23.15**

![](n2574s8img009.jpg)

**CONSENT OF QUALIFIED PERSON**

I, Mahmood Khwaja, P.E., consent to the incorporation by reference of Section 15.8 (the "Covered Section") of the Technical Report Summary titled "Technical Report Summary, Elk Creek Project, Nebraska" with an Effective Date of June 30, 2022 (the "Technical Report Summary") in this Registration Statement on Form S-8 and any and all amendments and supplements thereto (the "Registration Statement") of NioCorp Developments Ltd. (the "Company").

I also consent to the use of and references to my name, including my status as an expert or "qualified person" (as defined in Subpart 1300 of Regulation S-K promulgated by the U.S. Securities and Exchange Commission), in connection with the Registration Statement and the Technical Report Summary.

I also consent to any extracts from or a summary of the Covered Section in the Registration Statement (the "Disclosure").

I certify that I have read the Disclosure being filed by the Company and that it fairly and accurately represents the information in the Covered Section.

Signed and dated this 1st day of October 2025 at Boston, Massachusetts, USA.

---

| |
|:---|
| &nbsp;&nbsp; /s/ Mahmood Khwaja  |
| &nbsp;&nbsp;Mahmood Khwaja, PE<br> Vice President / Senior Geotechnical Engineer<br> Technical Services Unit \| ISG<br> CDM Smith |

---

## Exhibit 23.16

**Exhibit 23.16**

![](n2574s8img016.jpg)

**CONSENT OF QUALIFIED PERSON**

I, Wynand Marx, M.Eng., consent to the incorporation by reference of Section 13.6 (the "Covered Section") of the Technical Report Summary titled "Technical Report Summary, Elk Creek Project, Nebraska" with an Effective Date of June 30, 2022 (the "Technical Report Summary") in this Registration Statement on Form S-8 and any and all amendments and supplements thereto (the "Registration Statement") of NioCorp Developments Ltd. (the "Company").

I also consent to the use of and references to my name, including my status as an expert or "qualified person" (as defined in Subpart 1300 of Regulation S-K promulgated by the U.S. Securities and Exchange Commission), in connection with the Registration Statement and the Technical Report Summary.

I also consent to any extracts from or a summary of the Covered Section in the Registration Statement (the "Disclosure").

I certify that I have read the Disclosure being filed by the Company and that it fairly and accurately represents the information in the Covered Section.

Signed and dated this 1st day of October 2025 at Johannesburg, South Africa.

---

| |
|:---|
| &nbsp;&nbsp; /s/ Wynand Marx  |
| &nbsp;&nbsp;Wynand Marx, M.Eng.<br> Chief Operating Officer<br> BBE Consulting |

---

## Ex-Filing

?xml version='1.0' encoding='ASCII'?

**Exhibit 107**

**Calculation of Filing Fee Tables**

**Form S-8**

(Form Type)

**NioCorp Developments Ltd.**

(Exact Name of Registrant as Specified in its Charter)

<u>Table 1—Newly Registered Securities</u>

Fee Previously Paid

---

| | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|
| **Security Type** | **Security Class Title** | **Fee Calculation Rule** | **Amount Registered** | **Proposed Maximum Offering Price Per Unit** | **Maximum Aggregate** <br> **Offering Price** | **Fee Rate** | **Amount of Registration Fee** |
| Equity | Common Shares, without par value | Other | 14785(1) | $4.35(2) | $64314.75(2) | $138.10<br> per $1,000,000 | $8.88 |
| Equity | Common Shares, without par value | Other | 1625000(1) | $2.99(2) | $4858750.00(2) | $138.10<br> per $1,000,000 | $670.99 |
| Equity | Common Shares, without par value | Other | 5000(1) | $2.23(2) | $11150.00(2) | $138.10<br> per $1,000,000 | $1.54 |
| Equity | Common Shares, without par value | Other | 930000(1) | $1.40(2) | $1302000.00(2) | $138.10<br> per $1,000,000 | $179.81 |
| Equity | Common Shares, without par value | Other | 15000000(3) | $6.475(4) | $97125000.00(4) | $138.10<br> per $1,000,000 | $13412.96 |
| **Total Offering Amounts** | **Total Offering Amounts** | **Total Offering Amounts** | **Total Offering Amounts** |  | $103361214.75 |  | $14274.18 |
| **Total Fee Offsets** | **Total Fee Offsets** | **Total Fee Offsets** | **Total Fee Offsets** |  |  |  |  |
| **Net Fees Due** | **Net Fees Due** | **Net Fees Due** | **Net Fees Due** |  |  |  | $14274.18 |

---

(1)&nbsp;&nbsp;&nbsp;&nbsp; Represents the number of common shares, without par value ("Common Shares"), of NioCorp Developments Ltd. (the "Registrant") issuable upon exercise of options granted and outstanding under the NioCorp Developments Ltd. Long Term Incentive Plan (as amended, or amended and restated from time to time, the "2017 Plan") as of October 1, 2025, being registered on the Registration Statement on Form S-8 (the "Registration Statement") to which this exhibit relates. See "Explanatory Note" in the Registration Statement for more information. In addition, pursuant to Rule 416 of the Securities Act of 1933, as amended (the "Securities Act"), the Registration Statement also covers such additional Common Shares as may become issuable pursuant to the anti-dilution provisions of the 2017 Plan.

(2)&nbsp;&nbsp;&nbsp;&nbsp; Estimated solely for the purposes of determining the amount of the registration fee, pursuant to Rule 457(h) under the Securities Act, based on the exercise price of the options granted and outstanding under the 2017 Plan as of October 1, 2025.

(3)&nbsp;&nbsp;&nbsp;&nbsp; Represents the number of additional Common Shares available for issuance pursuant to the 2017 Plan that are being registered under the Registration Statement. In addition, pursuant to Rule 416 of the Securities Act, this Registration Statement also covers such additional Common Shares as may become issuable pursuant to the anti-dilution provisions of the 2017 Plan.

(4)&nbsp;&nbsp;&nbsp;&nbsp; Estimated solely for the purposes of determining the amount of the registration fee, pursuant to paragraphs (c) and (h) of Rule 457 under the Securities Act, on the basis of the average of the high and low sale prices of the Common Shares on The Nasdaq Stock Market on September 24, 2025, a date that is within five business days prior to filing the Registration Statement.