Ms. Misty Urbatsch reports

CORE NICKEL ANNOUNCES CHANGE OF AUDITOR

Core Nickel Corp. has changed its auditor from Deloitte LLP to Dale Matheson Carr-Hilton Labonte LLP. The change of auditor occurred at the request of the company. The company's board of directors accepted the resignation of the former auditor as of March 10, 2025, and appointed the successor auditor as the new auditor of the company effective March 10, 2025, and to hold office until the close of the company's next annual general meeting of shareholders.

There were no reservations in the former auditor's audit reports in connection with the audits of the company's two most recently completed financial years. There are no reportable events (as the term is defined in National Instrument 51-102, Continuous Disclosure Obligations) between the company and the former auditor.

In accordance with National Instrument 51-102, the required letters from the former auditor and the successor auditor have been reviewed by the audit committee and the board of directors, the notice of change of auditor has been approved by the audit committee and the board of directors, and these documents have been filed under the company's profile on SEDAR+.

About Core Nickel Corp.

Core Nickel is a junior nickel exploration company that controls 100 per cent of five projects in the Thompson nickel belt (TNB), a prolific nickel district in Northern Manitoba, Canada. The five projects consist of approximately 27,000 hectares of land that is proximal to existing infrastructure, including highways, railways, major hydroelectric transmission lines and operating mills.

Core Nickel has a large contiguous land package in the northern part of the TNB, situated approximately 15 kilometres to 20 kilometres from the city of Thompson. Core Nickel's northern TNB land package consists of three projects: Mel, Hunter and Odei River. The Mel project encompasses the Mel deposit, which is characterized by a historical mineral resource consisting of an indicated resource of 4,279,000 tonnes grading 0.875 per cent nickel plus an inferred resource of 1.01 million tonnes grading 0.839 per cent nickel at a cut-off of 0.5 per cent nickel. The target stratigraphy (Pipe formation) that hosts the Mel deposit and other deposits in the Thompson nickel belt extends onto the Hunter and Odei River projects and drill hole intersections into the target stratigraphy on the Hunter project have successfully intersected anomalous nickel.

The company also holds two projects in the central TNB near Wabowden: Halfway Lake and Resting Lake. Both projects host the target Pipe formation associated with known elevated nickel mineralization and are proximal to existing nickel deposits, mills and other infrastructure.

The qualified person under NI 43-101, Standards of Disclosure for Mineral Projects, for this news release is Caitlin Glew, PGeo, vice-president, exploration, for Core Nickel, who has reviewed and approved its contents.

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