Mr. Sam Lee reports

NORTHISLE ANNOUNCES CLOSING OF $115 MILLION FINANCING

Northisle Copper and Gold Inc. has closed the previously announced best efforts offering and non-brokered private placement with Wheaton Precious Metals Corp. for aggregate gross proceeds of $115,003,300.

Sam Lee, president and chief executive officer, commented: "We are pleased to welcome many new institutional investors to our share registry and are thankful for the ongoing support of our existing shareholders, including Wheaton. The financing and our inclusion in the B.C. Critical Minerals Office, combined with our growing engagement with first nations and North Island communities, highlights the opportunity for Northisle to rapidly advance the development of our North Island project."

Details of the offerings

The brokered offering consisted of: (i) 35,016,700 common shares of the company offered by way of the prospectus supplement (as defined below) at a price of $3.05 per common share for gross proceeds of $106,800,935; and (ii) 1.05 million common shares offered at the issue price on a private placement basis for gross proceeds of $3,202,500. The non-brokered offering consisted of 1,639,300 common shares offered at the issue price on a private placement basis for gross proceeds of $4,999,865. The aggregate number of common shares issued pursuant to the offerings was 37,706,000 for gross proceeds of $115,003,300. The net proceeds of the offerings will be used by the company for advancement of the company's projects and for general corporate and working capital purposes.

The brokered offering was conducted by a syndicate of agents led by Paradigm Capital Inc. as lead agent and sole bookrunner on behalf of a syndicate of agents, including Agentis Capital Markets (First Nations Financial Markets LP), Beacon Securities Ltd., Ventum Financial Corp., Raymond James Ltd., BMO Nesbitt Burns Inc., TD Securities Inc. and CIBC World Markets Inc. The agents received a cash commission of 5 per cent of gross proceeds of the brokered public offering, with the exception of gross proceeds of $1,351,455 from subscribers on a president's list provided by the company, to which a 2-per-cent commission was applied, plus 2 per cent of the gross proceeds of the brokered private placement. No compensation was paid to the agents in connection with the non-brokered offering.

The common shares offered pursuant to the brokered public offering were offered in all the provinces and territories of Canada, other than Quebec, on a best efforts basis by way of the prospectus supplement dated March 2, 2026, to the company's short form base shelf prospectus dated Feb. 25, 2026.

The common shares offered pursuant to the non-brokered offering and the brokered private placement were offered on a private placement basis pursuant to applicable exemptions from the prospectus requirements of Canadian securities laws under National Instrument 45-106, Prospectus Exemptions. Certain common shares were also issued in the United States on a private placement basis pursuant to available exemptions.

Certain directors and officers of the company purchased an aggregate of 109,800 common shares pursuant to the brokered public offering. Participation by the insiders in the offerings was considered a related party transaction pursuant to Multilateral Instrument 61-101, Protection of Minority Security Holders in Special Transactions. The company was exempt from the requirements to obtain a formal valuation or minority shareholder approval in connection with the insider participation pursuant to sections 5.5(a) and 5.7(1)(a) of MI 61-101 as neither the fair market value of any securities issued to, nor the consideration paid by, the insiders exceeded 25 per cent of the company's market capitalization. The company did not file a material change report relating to the insider participation more than 21 days before the expected closing date of the offerings as the details of the insider participation was not settled at such time.

The common shares sold pursuant to the non-brokered offering and the brokered private placement are subject to a statutory hold period of four months plus one day from the date of issuance.

About Northisle Copper and Gold Inc.

Northisle is a Vancouver-based company, the vision of which is to become Canada's leading sustainable mineral resource company for the future. Northisle, through its 100-per-cent-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, B.C., on a more than 34,000-hectare block of mineral titles 100-per-cent-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 economic potential of the 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. The company is committed to collaborating with first nations to build authentic, mutually beneficial relationships.

We seek Safe Harbor.