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NBY.V ·

Niobay Makes Its First Product Deliveries to Potential Customers/Partners M

Corporate Updates

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Pr

ess release

TSX-V: NBY & OTCQB: NBYCF

NIOBAY MAKES ITS FIRST PRODUCT DELIVERIES

TO POTENTIAL CUSTOMERS/PARTNERS

M

ontréal, Québec, June 3 , 202 5 - NioBay Metals Inc. (“NioBay” or the “Company”) (TSX -V: NBY)

(OTCQB: NBYCF) is proud to announce its first product deliveries from the SGS pilot plant in Qu ébec

City. This work was made possible by a grant from the Ministère des Ressources naturelles et des Forêts

(MRNF) under the Mining Exploration Support Program for Critical and Strategic Minerals for its Crevier

niobium and tantalum project (the “Crevier Project”) . The Crevier P roject is located approximately

50 km north of the town of Girardville and approximately 150 km from the Niobec mine. It is located in

the Nitassinan (or ancestral territory) of the Pekuakamiulnuatsh, whose main population center is

Mashteuiatsh.

Grant

The grant titled: “Demonstration of the niobium-t antalum concentration process on a pilot

scale and production of niobium and tantalum oxides from the Crevier Project deposit located in

the Lac St-J ean region” allowed us to test the robustness of our process dia gram. A first

delivery to a pot ential customer/partner will allow us to verify, with this consumer, that

our product can meet the specifications required by them. Other shipments will follow during

the month to other potential customers/partners who have already indicated their desire to

receive the product.

The Company will also distribute the concentrate to research partners involved in this project.

These include Université Laval, CENET, and URSTM. These partners will conduct trials to test

“unconventional” avenues for producing ANO (Niobium Ammonium Oxalate).

For the time being, the Crevier Pr oject will focus e xclusively on the production of niobium oxide

for battery manufacturers and tantalum oxide for high-t ech applications.

Message from NioBay’s President and Chief Executive Officer on Crevier

“We have just brought the Crevier Project to a new level in its history. These first deliveries to

Europe are just the beginning. Consumer trials will allow us to continue the dialogue and work

with these potential customers to deliver a product tha t meets their requirements. We hope our

shareholders will be proud of this progress a nd we thank them in advance for their support”,

concluded Mr. Jean-S ébastien David.

Qualified Person

This press release has been reviewed and approved by Jean-Sébastien David, P.Geo., a qualified

person under National Instrument 43-101. Mr. David is President and Chief Executive Officer of

NioBay.

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About NioBay Metals Inc.

NioBay aims to become a leader in the development of mine(s) with low carbon consumption and

responsible water and wildlife management practices while prioritizing the environment, social

responsibility, good governance, and the inclusion of all stakeholders. Our top priority, which is critical

to our success, is the consent and full participation of the Indigenous communities in whose territories

and/or on ancestral lands we operate. In addition to others properties, NioBay holds a 100% interest in

the James Bay Niobium Project located 45 km south of Moosonee, in the Moose Cree Traditional

Territory of the James Bay Lowlands in Ontario. NioBay also holds a 72.5% interest in the Crevier

Niobium and Tantalum project located in Québec and on the N itassinan territory of the

Pekuakaminulnuatsh First Nation. The Company has also the option to acquire a 80% interest in the

Foothills project, a titanium-phosphate project located near the former St-Urbain mine site in Québec.

About Niobium

Niobium is a naturally occurring element. It is a metal that is ductile, malleable and highly resistant to

corrosion. Because it enhances properties and functionalities, niobium is used in a wide range of

materials and applications in the Mobility, Structural and Energy sectors. Niobium transforms materials.

When added to materials like steel, glass and aluminum castings, niobium makes them more efficient

and lowers environmental impacts, while also increased value.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the

policies of the TSX Venture Exchange) accept responsibility for the adequacy or accuracy of this release.

Cautionary Statement

Certain statements contained in this press release constitute forward- looking information under the

provisions of Canadian securities laws including statements about the Company’s plans. Such

statements are necessarily based upon a number of beliefs, assumptions, and opinions of management

on the date the statements are made and ar e subject to numerous risks and uncertainties that could

cause actual results and future events to differ materially from those anticipated or projected. The

Company undertakes no obligation to update these forward- looking statements in the event that

management’s beliefs, estimates or opinions, or other factors should change, except as required by

law.

FOR MORE INFORMATION, CONTACT:

NioBay Metals Inc.

Jean-Sebastien David, geo.

President & Chief Executive Officer

Tel.: 514 866-6500

[email protected]

www.niobaymetals.com

Kimberly Darlington

Investor Relations

[email protected]

Tel: 514-771-3398