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Toronto, Ontario – December 8, 2025 – Core Nickel Corp. (TSX-V: CNCO)(“Core Nickel” or the “Company”) is pleased to announce the appointment of Carmelo Marrelli as Chief Financial Officer (“CFO”) of the Company, effective today, following the resignation of Harry Chan as the Company’s CFO. Mr. Marrelli is the principal of Marrelli Support Services, Inc., … Core Nickel Corp. Announces Appointment of CFO

Not for distribution to U.S. news wire services or for dissemination in the United States.  Toronto, Ontario – November 26, 2025 – Arizona Copper and Gold Ltd. (the “Company” or “ACG”) and  Core Nickel Corp. (TSXV: CNCO) (“Core Nickel”, and together with ACG, the “parties”) are pleased to  announce the closing of their previously announced … Arizona Copper and Gold Ltd. and Core Nickel Corp. Announce Closing of Concurrent Financings

TSX Venture Exchange: CNCO  NEWS RELEASE  ARIZONA COPPER AND GOLD LTD. AND CORE NICKEL CORP.  PROVIDE UPDATE ON REVERSE TAKEOVER TRANSACTION AND  CONCURRENT FINANCING  Not for distribution to U.S. news wire services or for dissemination in the United States.  Toronto, Ontario – November 24, 2025 – Arizona Copper and Gold Ltd. (the “Company” or “ACG”) … Arizona Copper and Gold Ltd. and Core Nickel Corp. Provide Update on Reverse Takeover Transaction and Concurrent Financing

Not for distribution to United States newswire services or for release, publication, distribution or  dissemination, directly or indirectly, in whole or in part, in or into the United States.  Toronto, Ontario, October 20, 2025 – Arizona Copper and Gold Inc. (the “Company” or “ACG”) and Core  Nickel Corp. (TSXV: CNCO) (“Core”) are pleased to announce … Core Nickel Corp. to Undertake RRSP & TFSA Eligible Private Placement Concurrent with Previously Announced Brokered Private Placement by Arizona Copper and Gold Inc. to Raise Combined Proceeds of up to $10 Million

Not for distribution to United States newswire services or for release, publication, distribution or  dissemination, directly or indirectly, in whole or in part, in or into the United States.  Toronto, Ontario, October 2, 2025 – Arizona Copper and Gold Inc. (the “Company” or “ACG”) and Core  Nickel Corp. (TSXV: CNCO) (“Core”) are pleased to announce … Arizona Copper and Gold Inc. and Core Nickel Corp. Announce Launch of Brokered Financing of up to $10 Million

Toronto, ON Canada, September 16, 2025 – Core Nickel Corp. (TSX-V: CNCO) (“Core” or the “Company”) is pleased to announce that Mike Pilmer has been appointed to the board of directors. Mr. Pilmer has over 20 years’ experience in banking, media and digital content solutions.  After earning a Bachelor of Arts and Master of Business … Core Nickel Corp. Announces Appointment of New Director

Toronto, ON Canada, September 15, 2025 – Core Nickel Corp. (TSX-V: CNCO) (“Core) and Arizona Copper and Gold Inc. (the “Company” or “ACG”, and together with Core, the “Parties”) are  pleased to announce that they have entered into a non-binding letter of intent (“Letter Agreement”) dated September 15, 2025 pursuant to which Core will acquire … Arizona Copper and Gold Inc. and Core Nickel Corp. enter into Letter of Intent relating to Reverse Takeover Transaction

Toronto, ON Canada, September 9, 2025 – Core Nickel Corp. (TSX-V: CNCO) (“Core Nickel” or the “Company”) announces the appointment of David Smith and Tim Dalton as independent directors of the Company effective September 8, 2025. David Smith Mr. Smith has been in the mineral exploration business for more than 40 years. His experience spans … Core Nickel Announces Board Changes

Saskatoon, SK, Canada, September 8, 2025 – Core Nickel Corp. (TSX-V: CNCO) (“Core Nickel” or the “Company”) announces that Misty Urbatsch ceased to be the Chief Executive Officer (“CEO”), President and a director of the Company effective September 5, 2025. Marc Pais, Director of Core Nickel, commented, “We wish to thank Misty, the founding CEO … Core Nickel Announces Change of Management