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Northisle Announces Selection of the North Island Project for the 2026 Canada Investment Summit Dealbook

Corporate Updates

Northisle Copper and Gold Inc. | 14th Floor – 1040 West Georgia St. | Vancouver, BC | V6E 4H1

www.northisle.ca | [email protected]

September 11, 2026

TSXV: NCX

OTCQX: NTCPF

Northisle Announces Selection of the North Island Project for the

2026 Canada Investment Summit Dealbook

Vancouver, B.C. – Northisle Copper and Gold Inc. (TSX-V: NCX, OTCQX: NTCPF) (“Northisle” or the “Company”) is

pleased to announce that the North Island Project has been selected for inclusion in the 2026 Canada Investment

Summit Dealbook (the “Dealbook”) . The Dealbook will be provided to leading global investors attending the

inaugural Canada Investment Summit (the “Summit”), an initiative designed to showcase Canadian investment

opportunities as part of the Government of Canada’s broader strategy to mobilize long-term capital into strategic

Canadian industries and assets.

The Summit is a novel national investment forum hosted by Prime Minister Mark Carney , in partnership with CPP

Investments and PSP Investments , that will bring together leading global investors, Canadian CEOs , and public -

sector representatives. The Summit forms part of the Government of Canada’s broader objective of catalyzing C$1

trillion in total investment in Canada over the next five years, with critical minerals identified among the sectors

expected to help drive new investment and strengthen Canada’s economic resilience.

Sam Lee, President & CEO, commented “We are very pleased to have the North Island Project selected for inclusion

in the Canada Investment Summit Dealbook. The Canada Investment Summit and the Dealbook provide exactly the

type of visibility and exposure necessary to attract global institutional capital to support sustainable resource

development in Canada. Canada, particularly through the Province of British Columbia , has the opportunity to

become an increasingly important part of the global critical minerals supply chain . The Summit is a bold and

concerted effort to realize this potential , and we are honoured to be part of Canada’s plan to achieve these

ambitious goals.”

Sam Lee continued “We believe the selection of the North Island Project reflects the project’s scale, quality, and

developability. With exceptional access to infrastructure and a focus on meaningful partnerships with First Nations,

Northisle is well positioned to continue developing the North Island Project responsibly and expediently. We

appreciate the recognition from the Government of Canada and look forward to highlighting Northisle’s approach to

creating enduring value through sustainable resource development to a global audience.”

Additional information regarding the Canada Investment Summit is available on the Government of Canada’s

Investment Summit website.

About Northisle

Northisle Copper and Gold Inc. is a Vancouver -based company whose vision is to become Canada’s leading

sustainable mineral resource company for the future. Northisle, through its 100% owned subsidiary North Island

Mining Corp., owns the North Island Project, which is one of the most promising copper and gold porphyry projects

in Canada. The North Island Project is located near Port Hardy, British Columbia on a more than 34,000 -hectare

block of mineral titles 100% owned by Northisle on a belt stretching 50 kilometres northwest from the now closed

Island Copper Mine operated by BHP Billiton. Since 2021, the Company has discovered two significant deposits,

expanded resources, demonstrated the potential of the North Island Project , and is now focused on the

development of this compelling project while exploring within this highly prospective land package.

Northisle Copper and Gold Inc. | 520 – 1050 West Pender St. | Vancouver, BC | V6E 3S7

www.northisle.ca | [email protected]

Northisle respectfully acknowledges that our North Island Project is located within the territories of Quatsino First

Nation, Kwakiutl First Nation, and Tlatlasikwala First Nation. We are committed to collaborating with First Nations

to build authentic, mutually beneficial relationships.

For more information on Northisle please visit the Company’s website at www.northisle.ca.

On behalf of Northisle Copper and Gold Inc.

Nicholas Van Dyk, CFA

Chief Financial Officer

Tel: (604) 638-2515

Email: [email protected]

www.northisle.ca

Cautionary Statements regarding Forward-Looking Information

Certain information in this news release constitutes forward -looking statements under applicable securities law. Any

statements that are contained in this news release that are not statements of historical fact may be deemed to be forward-

looking statement s. Forward -looking statements are often identified by terms such as “may”, “should”, “anticipate”,

“expect”, “intend” and similar expressions. Forward-looking statements in this news release include, but are not limited

to: plans and expectations regarding future project development and permitting; the timing, completion and results of the

Company’s planned activities ; the benefit s of being included in the 2026 Canada Investment Summit and the 2026

Canada Investment Summit Dealbook; and, the Company’s plans for advancement of the North Island Project. Forward-

looking statements necessarily involve known and unknown risks, including, without limitation, the Company’s ability to

implement its business strategies; risks associated with mineral exploration and production; risks associated with general

economic conditions; adverse industry events; stakeholder engagement; marketing and transportation costs; loss of

markets; volatility of commodity prices; inability to access sufficient capital f rom internal and external sources, and/or

inability to access sufficient capital on favourable terms; industry and government regulation; changes in legislation,

income tax and regulatory matters; competition; currency and interest rate fluctuations ; and, other risks. Readers are

cautioned that the foregoing list is not exhaustive.

Readers are further cautioned not to place undue reliance on forward -looking statements as there can be no assurance

that the plans, intentions, or expectations upon which they are placed will occur. Such information, although considered

reasonable by management at the time of preparation, may prove to be incorrect and actual results may differ materially

from those anticipated. Forward -looking statements contained in this news release are expressly qualified by this

cautionary statement.

The forward-looking statements contained in this news release represent the expectations of management of Northisle

as of the date of this news release, and, accordingly, are subject to change after such date. Northisle does not undertake

any obligation to update or revise any forward -looking statements, whether as a result of new information, future events

or otherwise, except as expressly required by applicable securities law.

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

Venture Exchange) accepts responsibility for the adequacy or accuracy of this news release.