Mr. Nicholas Van Dyk reports

NORTHISLE ANNOUNCES BOARD SLATE FOR 2026 AGM

Northisle Copper and Gold Inc. has proposed the slate of directors for its upcoming 2026 AGM (annual general meeting).

The company continues to attract highly capable executives and directors. In particular, the proposed slate includes Hume Kyle, who brings extensive financial and corporate governance experience, and joins incumbents Alex Davidson, Jill Donaldson, Kevin O'Kane and Sam Lee. Keena Hicken-Gaberria does not plan to stand for re-election at the upcoming AGM, and it is anticipated that Mr. Kyle will take up Ms. Hicken-Gaberria's roles on various board committees, if elected.

Mr. Davidson, chairman, stated: "We are pleased to add Hume Kyle to our proposed board slate for our upcoming AGM. Hume brings over 40 years of business experience, including over 25 years working within the natural resources sector, where he has held numerous senior management and board roles. Hume's skills and experience will complement our current directors as we continue to advance the development of our North Island project."

Mr. Davidson continued: "On behalf of the entire Northisle team, I would like to thank Keena for her many contributions to the company. Keena joined the board of directors of Northisle in June, 2022, and played an important role in the company's growth. We wish Keena continued success in her future endeavours."

Director profiles

Alexander (Alex) Davidson, non-executive chairman and director

Mr. Davidson has over 41 years of experience in designing, implementing and managing gold and base metal exploration and acquisition programs throughout the world. He was Barrick Gold Corp.'s executive vice-president, exploration and corporate development, with responsibility for its international exploration programs and corporate development activities. Mr. Davidson's professional career includes leadership and contribution to multiple landmark discoveries, such as Lagunas Norte, Pascua-Lama, Pierina and Veladero, along with significant involvement in Barrick's acquisitions of Lac Minerals, Homestake Mining and Placer Dome. Mr. Davidson is also director of Capital Ltd. and South Pacific Metals Corp. He has a BSc and an MSc in economic geology from McGill University. He was inducted into the Canadian Mining Hall of Fame in 2023, recognizing his inspiring achievements and visionary leadership in elevating the stature of Canadian mining.

Sam Lee, president, chief executive officer and director

Mr. Lee was appointed to the role of president and CEO of Northisle in October, 2020. Over the past 20 years, Mr. Lee advised on some of the most prominent M&A (merger and acquisition), equity and debt transactions in the international and Canadian mining industry, totalling over $100-billion in value. During this period, he worked in major resource markets, including Toronto, Sydney and Vancouver, where he led various strategic initiatives for CIBC World Markets. Most recently, he was managing director and head of CIBC's Vancouver Mining Group. Mr. Lee holds a bachelor of applied science, faculty of engineering, from the University of Toronto, was a graduate of the Lassonde Mineral Engineering program and is a CFA charterholder.

Jill Donaldson, director

As a senior corporate and securities lawyer for over 25 years, Ms. Donaldson now focuses on corporate directorships with expertise in M&A and capital markets, governance, enterprise risk, and executive talent oversight. Her board work spans M&A special committees and business transformation, governance, HR (human resources)/compensation, and audit. Current board positions include Fireweed Metals Corp., where she serves as chair of its governance and compensation committee and a member of its sustainability committee, and of Coast Capital Savings Federal Credit Union, which recently completed a three-way merger to form Canada's largest national purpose-driven credit union. Previously, Ms. Donaldson chaired special committees for Bluestone Resources Inc. and Great Bear Royalties Inc., each resulting in successful sale transactions at significant premiums. Ms. Donaldson also volunteers in the community serving as vice-chair of Canuck Place Children's Hospice and as a governor on the board of York House School. She holds a JD and BCom (honours) from UBC, and the ICD.D and GCB.D designations.

Kevin O'Kane, chief operating officer and director

Mr. O'Kane has more than 40 years of extensive business and operating leadership expertise in the natural resource industry. He spent 37 years at BHP Billiton developing, expanding and operating some of the most formative copper mines in the world, which included Spence, Cerro Colorado and Minera Escondida. Mr. O'Kane started his career at the Island Copper mine, situated adjacent to the company's North Island project, and spent the following 12 years progressing to the role of chief mining engineer. During his tenure at BHP Billiton, he also served as vice-president, health, safety, environment and community, for the copper business. Most recently, Mr. O'Kane held the position of executive vice-president and chief operating officer at SSR Mining Inc., 2018 to 2020, where he led all aspects of its operations, permitting and sustainability programs globally while achieving record production at all three of its producing mines. Mr. O'Kane also serves on the board of Autlan, Almaden Minerals and Iamgold Corp. In September, 2025, Mr. O'Kane was appointed as executive vice-president chief operating officer of the company in addition to his existing role as director of the company.

Hume Kyle, director nominee

Mr. Kyle is a CPA, CA, with over 40 years of private sector and public accounting experience, including over 25 years working with mining, energy and other natural resources companies in senior management and board roles. Mr. Kyle served as executive vice-president and chief financial officer of Dundee Precious Metals Inc., a multinational gold mining company, from 2011 until his retirement on Dec. 31, 2022. Prior to that Mr. Kyle was vice-president, treasurer and controller of TransAlta Corp., a multinational power generation and wholesale marketing company, from 2009 to 2011, and vice-president, finance, and chief financial officer of Fort Chicago Energy Partners LP, a pipeline, natural gas liquids processing and power company, from 2003 to 2009. Mr. Kyle also held increasingly senior finance and accounting roles at Nexfor Inc., Noranda Inc., Deloitte & Touche, and Price Waterhouse & Co. Additionally, Mr. Kyle currently serves on the boards of Novagold Resources Inc. and Plum Acquisition Corp. III, and previously served on the boards of Stornoway Diamond Corp. (2013 to 2019), Alliance Pipeline (2004 to 2009), Aux Sable (2004 to 2009) and the Canadian Association of Income Funds (2005 to 2009), serving on several committees, including the audit committee, as chair. Mr. Kyle received a bachelor of arts degree in economics and accounting from the University of Western Ontario, a graduate diploma in public accounting from McGill University, a CA designation from the Ontario Institute of Chartered Accountants (now CPA Ontario), a CFA designation from the Institute of Chartered Financial Analysts, and an ICD.D designation from the Institute of Corporate Directors.

Issuance of share-based compensation

Northisle also announces that the company's board of directors has approved the issuance of 42,600 stock options pursuant to the company's incentive stock option plan. The options provide for the purchase of an aggregate of 42,600 common shares of the company at an exercise price of $2.90 per share, which is the closing price for the common shares on the TSX Venture Exchange as of May 26, 2026. All of the options have a five-year term and vest one-third per year commencing on May 27, 2026.

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

About Northisle Copper and Gold Inc.

Northisle Copper 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 and 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 its 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.