Mr. Sam Lee reports

NORTHISLE ANNOUNCES EXPANSION OF EXECUTIVE AND TECHNICAL ADVISORY TEAM

NorthIsle Copper and Gold Inc. has made several additions to its leadership team, including:

• Andrea Zaradic, MASc, PEng -- vice-president, project development;
• Kate Mueller, PEng -- vice-president, sustainability;
• Dr. John Thompson -- technical adviser.

Sam Lee, president and chief executive officer, commented: "I am very excited to be announcing the additions of Andrea Zaradic, Kate Mueller and Dr. John Thompson to the NorthIsle team. NorthIsle is focused on building enduring value through the acceleration of our North Island project, and the appointment of Andrea and Kate is an important step towards executing on this plan. Andrea's decades of operating and project development experience, including most recently as general manager for Newmont's Red Chris Block Cave project in B.C., uniquely qualifies her to execute on our development plans. Andrea will succeed Ian Chang, who is retiring and has been instrumental in developing the North Island project over the last four years. Ian will remain as a strategic adviser through a transition phase. Kate has over two decades of experience as a practicing engineer and regulatory specialist, and has developed considerable expertise in building partnerships with indigenous groups in Western Canada, which will help NorthIsle advance our project rapidly and responsibly. Kate will ensure NorthIsle continues to move the North Island project forward while meeting all regulatory requirements and engaging meaningfully to build strong, respectful relationships with first nations partners."

Mr. Lee continued: "With respect to our growth strategy, the addition of Dr. John Thompson, a globally recognized porphyry expert with more than 35 years of industry and research experience, will be invaluable to the NorthIsle team. John will collaborate with Dr. Pablo Mejia on generative exploration efforts that aim to illustrate the potential of our North Island project as we continue to advance our data-driven exploration strategy across the 50-kilometre North Island porphyry district."

Ms. Zaradic brings more than 35 years of experience in executive leadership, project development, and operations across the mining and renewable energy sectors. Her career spans the Americas, Africa, Asia and Europe, where she has led complex projects through development, construction and operations.

Most recently, Ms. Zaradic served with Newmont as general manager for the Red Chris Block Cave project, where she was responsible for advancing a large-scale, technically complex underground development. Prior to Newmont, she spent six years as vice-president, operations, at Euro Manganese, where she played a key leadership role in advancing the company's manganese project through critical stages of development and execution.

Ms. Zaradic has also held numerous senior executive roles, including president and chief executive officer of Northair Silver (now Kootenay Silver) and president and CEO of Troon Ventures Ltd. Earlier in her career, she served as vice-president, operations and development, for Magma Energy Corp., manager of infrastructure development for Canico Resource Corp. on the Onca Puma nickel laterite project in Brazil, and as a construction and senior process operations engineer at BHP Billiton's Ekati diamond mine. In addition to her executive roles, Ms. Zaradic serves as a technical adviser to Northleaf Capital, supporting their geothermal investments, and is a board member of Sedna Wind Technologies.

Ms. Zaradic holds a master of applied science (MASc) degree in mechanical engineering from the University of British Columbia and is a registered professional engineer in the provinces of British Columbia and Ontario.

Ms. Mueller is a registered professional engineer and regulatory specialist with over 25 years of experience in the mining industry. Most recently, Ms. Mueller served as director, regulatory approvals and compliance, for Falkirk Consulting where she supported project teams as a strategic adviser to identify and mitigate project risks, including interpretation of legislative requirements, regulatory process definition and control, project design, and identification of mitigations and management of environmental impacts.

Ms. Mueller also has extensive experience building partnerships with indigenous groups to align on project development and ensure key concerns have been meaningfully addressed. She is an effective facilitator in multiple forums and establishes mutual project understanding and alignment with diverse groups. Ms. Mueller has extensive experience managing regulatory compliance through construction, operations and project changes for mine sites. She has acted as a strategic adviser to support the management of compliance as well as identification and enhancement of systems and tools.

Ms. Mueller has previously held senior roles within both industry and government, where she has led all regulatory aspects of complex mining projects. Ms. Mueller holds a bachelor of science (BSc) degree in geological engineering from the University of Saskatchewan and is a registered professional engineer in the province of British Columbia.

Dr. John Thompson partners in a consulting business based in Vancouver, B.C., focused on exploration, mining, innovation and sustainability. He combines academic experience -- honorary professor of responsible resources at the University Bristol and prior positions at Cornell University and the University of British Columbia, and industry experience -- 35 years in mining and exploration including roles as chief geoscientist and VP, technology and development, at Teck Resources. Dr. Thompson has held diverse leadership roles in many organizations -- MDRU-UBC, Genome BC, World Economic Forum, Society of Economic Geologists, Geoscience BC and Canada Mining Innovation Council. He is a director of KoBold Metals and MineSense, a co-founder of Regeneration Enterprises, and has roles in other exploration, technology, venture capital and research organizations.

Issuance of share-based compensation

NorthIsle also announces that the company's board of directors has approved the issuance of 862,000 stock options pursuant to the company's incentive stock option plan. The options provide for the purchase of an aggregate of 862,000 common shares of the company at an exercise price of $3.03 per share, which is the closing price for the common shares on the TSX Venture Exchange as of April 6, 2026. All of the options have a five-year term and vest one-third per year commencing on April 7, 2026.

In addition, the board of directors has approved the issuance of 304,000 restricted share units (the RSUs), pursuant to the company's share unit plan. The RSUs will vest one-third per year commencing April 7, 2027.

The board of directors has also approved the issuance of 7,000 deferred share units (the DSUs) to eligible directors, pursuant to the share unit plan. The deferred share units (DSUs) will vest on April 7, 2027.

Further terms of the options, RSUs and DSUs can be found in the stock option plan and share unit plan as filed on SEDAR+.

About NorthIsle Copper and Gold Inc.

NorthIsle Copper and Gold is a Vancouver-based company whose vision 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 the company's 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.