NioCorp Announces Pricing of $60.0 Million Public Offering of Common Shares

CENTENNIAL, CO / ACCESS Newswire / September 26, 2025 / NioCorp Developments Ltd. ("NioCorp" or the "Company") (NASDAQ:NB) today announced the pricing of its previously announced public offering in the United States (the "Offering"). The Offering is expected to consist of up to 9,760,000 common shares (or pre-funded warrants in lieu thereof) at a public offering price of $6.15 per common share (or $6.1499 per pre-funded warrant), for gross proceeds that are expected to be approximately $60.0 million before deducting placement agent fees and offering expenses.

Maxim Group LLC is acting as sole placement agent for the Offering.

NioCorp currently intends to use the net proceeds from the Offering for working capital and general corporate purposes, including to advance its efforts to launch construction of the Elk Creek Project and move it to commercial operation. The Offering is expected to close on or about September 29, 2025, subject to the satisfaction of customary closing conditions.

The Offering is being made pursuant to an effective shelf registration statement on Form S-3 (File No. 333-280176), previously filed with the U.S. Securities and Exchange Commission (the "SEC") on June 13, 2024 and subsequently declared effective by the SEC on June 27, 2024. NioCorp may offer and sell securities in both the United States and other jurisdictions outside of Canada. No securities will be offered or sold to Canadian purchasers under the Offering.

A preliminary prospectus supplement and accompanying prospectus relating to the Offering and describing the terms thereof has been filed with the SEC and forms a part of the effective registration statement and is available on the SEC's website at www.sec.gov. Copies of the preliminary prospectus supplement and accompanying prospectus may be obtained by contacting Maxim Group LLC, at 300 Park Avenue, 16th Floor, New York, NY 10022, Attention: Syndicate Department, or by telephone at [phone] or by email at [e-mail]. The final terms of the Offering will be disclosed in a final prospectus supplement to be filed with the SEC, which will be available for free on the SEC's website at www.sec.gov and will also be available on the Company's profile on the SEDAR+ website at www.sedarplus.ca.