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 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.

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 statements. 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 benefits 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 from 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.