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NIOB.CN ·

Closing of Oversubscribed Private Placement of Flow-Through Shares.

Financings

North American Niobium and Critical Minerals Corp. Announces

Closing of Oversubscribed $1.96m Flow-Through Financing

- NOT FOR DISSEMINATION IN THE UNITED STATES OR THROUGH U.S.

NEWSWIRE SERVICES -

Vancouver, BC, December 12, 2025 – North America Niobium and Critical Minerals Corp.

(CSE: NIOB) (FSE: IOR) (OTCQB: NIOMF) (“North American Niobium” or the

“Company”) is pleased to announce, further to its news release of December 4, 2025, that the

Company has closed the previously announced non-brokered private placement of flow-through

common shares in the capital of the Company (each, an “FT Share”) by the issuance of 1,351,955

FT Shares at $1.45 per FT Share for gross proceeds of $1,960,334.75, exceeding the proposed

amount previously announced (the “Oversubscribed Offering”).

The gross proceeds from the issuance of the FT Shar es will be used to incur eligible “Canadian

exploration expenses” in Quebec that qualify as “flow-through critical mineral mining

expenditures” as such terms are defined in the Income Tax Act (Canada). The Company has agreed

to renounce such qualifying expenditures with an effective date of no later than December 31,

2025, in an amount of not less than the total amount of the gross proceeds raised from the issuance

of FT Shares, and incur such expenses by December 31, 2026.

In connection with the Oversubscribed Offering , the Company paid finde r’s fees to eligible

finders consisting of $137,223.43 in cash and 94,636 common share purchase warrants (the

“Finder’s Warrants”). Each Finder’s Warrant is exercisable to acquire one common share in the

capital of the Company at an exer cise price of $1.45 for a period of 24 months fro m the date of

issuance.

“The overwhelming demand for this financing is a reflection of the strength of the work we’re

doing and the potential that our Quebec exploration portfolio continues to show. With total flow-

through funding of $4.82 million secured for our 2026 exploration program, we are well positioned

to execute focused and strategic exploration initiatives aimed at generating substantial value for

our shareholders,” said Murray Nye, CEO of North American Niobium.”

All securities issued in connection with the Oversubscribed Offering are subject to a statutory hold

period of four months plus a day ending on April 13, 2026, in accordance with applicable securities

legislation and policies of the Canadian Securities Exchange (“CSE”).

This press release shall not constitute an offer to sell or the solicitation of an offer to buy securities

in the United States, nor shall there be any sale of the securities in any jurisdiction in which such

offer, solicitation or sale would be unlawful. The securities being offered have not been, nor will

they be, registered under the 1933 Act or under any U.S. state securities laws, and may not be

offered or sold in the United States absent registration or an applicabl e exemption from the

registration requirements of the 1933 Act, as amended, and applicable state securities laws.

ABOUT NORTH AMERICAN NIOBIUM AND CRITICAL MINERALS CORP.

North American Niobium and Criti cal Minerals Corp. is a North American mineral exploration

company focused on the acquisition and development of precious, base, and critical mineral assets.

Its portfolio includes the Silver Lake property in British Columbia’s Omineca Mining Division

and a recently acquired land package in Quebec’s Grenville Province. The Quebec properties add

exposure to rare earth elements (REE), niobium (Nb), and nickel -copper (Ni-Cu) occurrences,

expanding the Company’s footprint into critical minerals that are strategically important for energy

and defense applications.

ON BEHALF OF THE BOARD OF DIRECTORS:

Murray Nye

Chief Executive Officer

1055 West Georgia Street, Suite 1500

Vancouver, BC V6E 0B6

Canada

For further information, please contact:

Murray Nye, CEO

Email: [email protected]

Phone: +1 (647) 984-4204

CSE: NIOB

OTCQB: NIOMF

FSE:IOR

The Canadian Securities Exchange does not accept responsibility for the adequacy or accuracy of

this release and has neither approved nor disapproved the contents of this press release.

Forward-Looking Statements

This news release includes "forward-looking in formation" that is s ubject to a number of

assumptions, risks and uncertainties, many of which are beyond the control of the Company.

Forward-looking statements may include but are not limited to the use of proceeds and available

funds following the completion of the Oversubscrib ed Offering and are subject to all of the risks

and uncertainties normally incident to such e vents. Investors are cautioned that any such

statements are not guarantees of future events an d that actual events or developments may differ

materially from those projected in the forw ard-looking statements . Such forward-looking

statements represent management's best judgment based on informat ion currently available. No

securities regulatory authority has e ither approved or disapproved of the contents of this news

release. The Company undertakes no obligation to update publicly or otherwise revise any

forward- looking statements, except as may be required by law.