Toronto, Ontario–(Newsfile Corp. – November 18, 2025) – Greencastle Resources Ltd. (TSXV: VGN) (“ Greencastle ” or the “ Company “) announces that the Company has entered into a share purchase agreement dated November 18, 2025, with an arm’s length third party (the “ Vendor “) pursuant to which the Company will acquire (the “ Acquisition “) an aggregate of 500,000 common shares (the “ Purchased Shares “) in the capital of Royal Uranium Inc. (“ Royal Uranium “). Prior to the acquisition of the Purchased Shares, the Company did not hold any securities of Royal Uranium.

As consideration for the Purchased Shares, the Company will issue 3,500,000 common shares (the “ Consideration Shares “) from treasury at a deemed price of $0.05 per share for an aggregate deemed value of $175,0

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