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NBY.V ·

Niobay Appoints a New Member to Its Board of Directors

Management Changes

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Press release

TSX-V: NBY & OTCQB: NBYCF

NIOBAY APPOINTS A NEW MEMBER TO ITS BOARD OF DIRECTORS

Montréal, Québec, September 22, 2026 - NioBay Metals Inc. (“NioBay” or the “Company”) (TSX-V: NBY)

(OTCQB: NBYCF) is pleased to announce the appointment of Mr. Guillaume Bacconnier to its Board of

Directors, effective immediately.

Mr. Bacconnier holds a Master’s degree in Polymer Science. Throughout his career, he has held various

commercial and operational leadership positions in seven countries. He has been a member of the Rio

Tinto Group for approximately 20 years. He currently serves as General Manager of Évolys Québec Inc.,

a joint venture formed by Rio Tinto and Aymium, a technology company , to produce biocarbon in

Canada.

In addition, the Company has approved the grant of 150,000 incentive stock options to Mr. Bacconnier.

One-third of these stock options will vest immediately, with the remaining stock options subject to a

two-year vesting period. The options have a term of seven years and an exercise price of $0. 08 per

share. The stock options were granted pursuant to the Company’s Stock Option Plan and are subject to

applicable securities laws and the policies of the TSX Venture Exchange.

Message from NioBay’s President and CEO

“I am very pleased to welcome Guillaume to the Company’s Board of Directors. His drive, extensive

experience in large corporations, and involvement in various strategic minerals projects will bring

valuable expertise to help us advance through NioBay’s next stages of development.”

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 other 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 an 80.2% interest in the Crevier Niobium and Tantalum project located i n

Québec and on the Nitassinan (ancestral territory) of the Pekuakamiulnuatsh First Nation.

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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.

About Tantalum

One of the main uses of tantalum is in the production of electronic components. Tantalum (Ta) causes

no immune response in mammals, so has found wide use in the making of surgical implants. It can

replace bone, for example, in skull plates; as foil or wire , it connects torn nerves; as woven gauze it

binds abdominal muscle. Tantalum alloys can be extremely strong and have been used for turbine

blades, rocket nozzles and internal combustion engines.

Cautionary Statements Regarding Forward-Looking Information

Certain statements in this news release constitute “forward- looking information” within the meaning

of Canadian securities laws. Forward -looking statements and information may be identified by such

terms as "anticipates", "believes", "targets", "estimates" , "plans", "expects", "budget", "scheduled",

"forecasts", "intends", "may", "will", "could" or "would" or the negative connotation thereof. These

statements are necessarily based on a number of management’s beliefs, assumptions, and opinions as

of the date they are made and are subject to numerous risks and uncertainties that could cause actual

results and future events to differ materially from those anticipated or projected, including those risks

set out in the Company’s public disclosure record on SEDAR+ (www.sedarplus.ca) under the Company’s

issuer profile. Readers are cautioned that reliance on such information may not be appropriate for other

purposes. Although the assumptions made by the Company in providing forward- looking information

is considered reasonable by management at the time, there can be no assurance that such assumptions

will prove to be accurate and actual results and future events could d iffer materially from those

anticipated in such information. The Company assumes no obligation to update these forward-looking

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

required by law.

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.

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