NB

EX-99.1

2 n2574_x323-exh991.htm

PRESS RELEASE, DATED OCTOBER 16, 2026

Exhibit 99.1

NioCorp Provides Preliminary Unaudited Financial Results for the

Three-Month Period Ended September 30, 2026

CENTENNIAL, Colo. (October 16, 2026) – NioCorp Developments Ltd. (“NioCorp,” “our,” or the “Company”) (NASDAQ:NB) today provided its preliminary unaudited financial results for the three-month period ended September 30, 2026, which are presented below.

The Company reported net income attributable to NioCorp of $3.7 million, or $0.03 per share (basic), for the three-month period ended September 30, 2026, as compared to a net loss attributable to NioCorp of $42.7 million, or $0.53 per share (basic), for the three months ended September 30, 2025. As of September 30, 2026, the Company had a cash balance of $405.1 million on its consolidated balance sheet.

The net income for the three months ended September 30, 2026 primarily reflects non-cash gains of approximately $8.5 million related to earnout shares and warrants classified as liabilities on the consolidated balance sheet, driven by a decrease in the closing price of the Company’s common shares between June 30, 2026 and September 30, 2026. By contrast, the net loss for the three months ended September 30, 2025 primarily reflected non-cash losses of approximately $32.1 million related to the same liability-classified instruments, driven by an increase in the closing price of the Company’s common shares between June 30, 2025 and September 30, 2025.

The Company continues as a development stage company, and its operating cash outflows for the three-month period ended September 30, 2026 totaled $6.1 million, primarily representing recurring general and administrative costs as well as costs related to the finalization and issuance of the technical and economic study for the Elk Creek Critical Minerals Project (the “Elk Creek Project”). In addition, its investing outflows for the three-month period ended September 30, 2026 totaled $5.9 million, primarily representing additional expenditures associated with ongoing construction of the mine portal at the Elk Creek Project.

The Company intends to file its unaudited interim condensed consolidated financial statements for the three-month period ended September 30, 2026 in its Quarterly Report on Form 10-Q on or before November 16, 2026.

All figures reported above with respect to the three-month period ended September 30, 2026 are preliminary and are unaudited and subject to change and adjustment as the Company prepares its unaudited interim condensed consolidated financial statements for the three-month periods ended September 30, 2026 and 2025. Accordingly, investors are cautioned not to place undue reliance on the foregoing information. The Company does not intend to provide preliminary results on a regular basis in the future. The preliminary results provided in this news release constitute “forward-looking information” and “forward-looking statements” within the meaning of

NioCorp Developments Ltd., 7000 S. Yosemite, #115, Centennial CO 80112 | (720) 334-7066 | www.niocorp.com

Page 2 of 4

applicable Canadian and U.S. securities laws, are based on several assumptions and are subject to a number of risks and uncertainties. Actual results may differ materially. See “Forward-looking Statements.”

#  #  #

FOR MORE INFORMATION:

Jim Sims, Corporate Communications Officer, NioCorp Developments Ltd., (720) 334-7066, jim.sims@niocorp.com

Alex Guthrie, Director, Investor Relations, NioCorp Developments Ltd., (647) 999-0527, aguthrie@niocorp.com

@NioCorp $NB #Niobium #Scandium #rareearth #neodymium #dysprosium #terbium #ElkCreek

ABOUT NIOCORP

NioCorp is developing the Elk Creek Project that is expected to produce niobium, scandium, titanium, and several rare earth products, including neodymium-praseodymium oxide, dysprosium oxide, terbium oxide, samarium-europium-gadolinium (“SEG”) carbonate, and heavy rare earth carbonate. Niobium is used to produce specialty alloys as well as High Strength, Low Alloy steel, which is a lighter, stronger steel used in automotive, structural, and pipeline applications. Scandium is a specialty metal that can be combined with Aluminum to make alloys with increased strength and improved corrosion resistance. Scandium is also a critical component of advanced solid oxide fuel cells. Titanium is used in various lightweight alloys and is a key component of pigments used in paper, paint, and plastics and is also used for aerospace applications, armor, and medical implants. Magnetic rare earths, such as neodymium, praseodymium, terbium, and dysprosium are critical to the making of neodymium-iron-boron magnets, which are used across a wide variety of defense and civilian applications.

FORWARD-LOOKING STATEMENTS

This press release contains forward-looking statements within the meaning of the United States Private Securities Litigation Reform Act of 1995 and forward-looking information within the me

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): October 12, 2025

NioCorp Developments Ltd.

(Exact name of registrant as specified in its charter)

British Columbia, Canada

(State or other jurisdiction

of incorporation) 001-41655

(Commission File Number) 98-1262185

(IRS Employer

Identification No.)

7000 South Yosemite Street, Suite 115

Centennial, Colorado 80112

(Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code: (720) 334-7066

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Shares, without par value NB The Nasdaq Stock Market LLC

Warrants, each exercisable for 1.11829212 Common Shares

NIOBW

The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

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 13(a) of the Exchange Act. ☐

Item 2.02. Results of Operations and Financial Condition.

On October 12, 2025, NioCorp Developments Ltd. (the “Company”) announced a Company update relating to certain preliminary financial results for the three-month period ended September 30, 2025. This announcement was contained in a press release, a copy of which is attached as Exhibit 99.1 hereto. Such exhibit and the information set forth therein shall not be deemed to be filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise be subject to the liabilities of that section, nor shall it be deemed to be incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act.

Item 7.01. Regulation FD Disclosure.

The information set forth in Item 2.02 of this Current Report on Form 8-K is incorporated herein by reference.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

Exhibit

Description

99.1 Press Release, dated October 12, 2025

104 Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

NIOCORP DEVELOPMENTS LTD.

DATE: October 14, 2025 By: /s/ Neal S. Shah

Neal S. Shah

Chief Financial Officer