WHITEROCK LITHIUM CORP. DISCLOSUREBeneficial Ownership (13D/G / major holdings)

Notice of Initial Substantial Holders

WhiteRock Lithium Corp. ARBN 697 446 969 Registered Office (Aus): C/- Automic Group Level 5, 126-130 Phillip Street Sydney NSW 2000 www.whiterocklithium.com [email protected] 25 August 2026 Notice of Initial Substantial Holders WhiteRock Lithium Corp. (ASX: WLC) (WhiteRock, WLC or Company) provides ASX with the following information regarding substantial shareholders in WhiteRock within the meaning of section 671B of the Corporations Act 2001 (Cth), to the best knowledge of the Company. This information is provided in accordance with the deed poll of undertaking given by the Company to ASX as a condition of its admission to the official list of ASX. Name of substantial shareholder Date the holder became a substantial shareholder5 Number of securities1 Voting power Dustin Nanos2 20 August 2026 17,552,443 20.4% Drew Nanos3 20 August 2026 16,127,990 18.7% Kingslane Pty Ltd4 20 August 2026 7,100,000 8.2% Notes: 1 CHESS Depositary Interests (CDI). Each CDI represents one underlying fully paid common share in the capital of the Company. 2 Comprised of 10,585,000 CDIs held by Dustin Nanos personally and 6,967,443 CDIs held by Orca Holdings Corp, an entity controlled by Dustin Nanos. 3 Comprised of 12,953,000 CDIs held by Drew Nanos personally and 3,174,990 CDIs held by Riversix Trading Inc., an entity controlled by Drew Nanos. 4 Kingslane Pty Ltd is controlled by John and Loretta Cranston. Kingslane Pty Ltd holds these CDIs as trustee for the Cranston Super Pension Fund. 5 Date of admission to the official list of ASX and date on which the Deed Poll of Undertaking became applicable. This announcement is authorised for release to the market by the Board of Directors. For personal use only 2 Incorporation: WhiteRock is a Canadian entity incorporated in the Province of Albert Canada and continued in British Columbia, Canada. The Company is registered in Australia as a foreign company, but it is not incorporated in Australia. Consequently, the Company's general corporate activities (apart from any offering of securities in Australia and certain other matters) are not generally regulated by the Corporations Act 2001 (Cth) or by the Australian Securities and Investments Commission but are instead governed by the Articles of the Company and the laws of British Columbia, speci