Northisle Announces Inclusion in Global Junior Gold Miners Index

About this update from Northisle Copper And Gold Inc.

VANCOUVER, British Columbia, September 14, 2026 --( BUSINESS WIRE )--Northisle Copper and Gold Inc. (TSX-V: NCX, OTCQX: NTCPF) ("Northisle" or the "Company") is pleased to announce that it has been added to the MVIS Global Junior Gold Miners Index ("MVGDXJ"), the underlying benchmark index for the VanEck Junior Gold Miners ETF ("GDXJ"), pursuant to the MVGDXJ's semi-annual review and rebalancing. The rebalancing will be effective as of market close on September 18, 2026. Sam Lee, President & CEO, commented "Northisle's index inclusion represents another important milestone in the Company's evolution. We expect this event will further enhance Northisle's market visibility and trading liquidity as we continue to advance our dual focus on value through project development, and growth through exploration. Importantly, inclusion in the GDXJ highlights Northisle's substantial exposure to gold, while the Company retains its significant exposure to copper." The GDXJ is a well recognized, widely followed exchange traded fund that provides investors with exposure to a global portfolio of small and mid-cap miners involved primarily in the gold and silver mining industries. For more information on the GDXJ, please visit: https://www.vaneck.com/us/en/investments/junior-gold-miners-etf-gdxj/overview/ For more information on the MVGDXJ, please visit: https://www.marketvector.com/indexes/hard-asset/mvis-global-junior-gold-miners 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 potential benefits of being included in the MVIS Global Junior Gold Miners Index or the VanEck Junior Gold Miners ETF; 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. View source version on businesswire.com: https://www.businesswire.com/news/home/20260914681975/en/ Contacts 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

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