Earnings release
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30 July 2026 ASX Announcement Quarterly Activities Report For the period ending 30 June 2026 Burgundy Diamond Mines Limited (ASX: BDM) ( Burgundy or the Company ) provides its quarterly activities report for the period ended 30 June 2026 ( Q2-2026, June quarter ). Ekati Operational Performance Table 1.1: Key quarterly operating performance metrics. Units Q2 2025 Q1 2026 Q2 2026 % Quarterly Variance Waste tonnes mined Mwmt 2.4 0.02 0.01 -50% Ore tonnes mined Mwmt 1.11 0.29 0.28 -3% Tonnes processed Mdmt 0.78 0.26 0.35 35% Carats recovered Mcts 0.81 0.38 0.45 18% Carats sold Mcts 0.9 0.23 0.42 83% Diamond inventories Mcts 0.55 0.55 0.36 -35% Carats recovered per tonne processed C/t 1.04 1.48 1.29 -13% Operations Operations continued at Misery Underground, and at Sable open pit. Preparations continued for construction of the Fox wash plant and planning continued for development of Fox underground. Finance and Restructuring During the quarter, the Company’s subsidiary, Arctic Canadian Diamond Company Ltd. ( Arctic Canadian ), filed for insolvency protection under the Companies’ Creditors Arrangement Act of Canada. See the announcement dated 4 May, 2026 for more details. Burgundy Diamond Mines Limited (ASX: BDM) 1 Level 25 South32 Tower, 108 St. Georges Terrace Perth, Western Australia 6000
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Corporate Units As at 30 June 2026 3 As at 31 December 2025 3 Cash US$M 8.0 26.6 Diamond inventories 1 US$M Mcarats 17.0 0.4 13.7 0.2 Bank loans and Borrowings US$M 157.7 113.6 Capital leases US$M 3.1 9.2 Consolidated Net Cash (Debt) 2 US$M (152.8) (96.2) Consolidated Net Cash (Debt) including diamond inventories US$M (135.8) (82.5) Notes: (1) Diamond inventory is valued at lower of cost or net realisable value, which is not necessarily indicative of its market value. (2) Consolidated Net Cash/(Debt) comprises of cash less debt. Debt is defined as bank loans and borrowings and capital leases. (3) December and March closing balances are unaudited. Other Projects Naujaat Project (40% Burgundy Joint Venture) No substantive activities occurred during the December quarter. Post Quarter Events On 14 July 2026 the Government of the Northwest Territories applied to the Supreme Court of British Columbia for the appointment of a receiver over Arctic Canadian. The Court granted the application and appointed PricewaterhouseCoopers as receiver, thereby handing over control of the Ekati site. -ENDS- This announcement was authorised for release by the Board of Burgundy Diamond Mines Limited. Investor enquiries Media enquiries investor@burgundydiamonds.com communica ons@burgundydiamonds.com About Burgundy Diamond Mines Limited Burgundy Diamond Mines is a premier, independent, global-scale diamond company focused on capturing margins across the entire value chain from mining and production to the sale of diamonds. Burgundy’s strategic approach involves building a balanced portfolio of diamond projects located in favourable jurisdictions, including the globally ranked Canadian mining asset Ekati. Burgundy’s unique mine to market business model ensures total chain of custody and provides traceability along every step of the process, safeguarding the ethical production of the diamonds from mine to point of sale. Founded in Perth, Western Australia, Burgundy is led by a world-class management team and Board, combining global expertise with a commitment to sustainable and responsible diamond operations. Caution regarding Forward Looking Information This document may contain forward looking statements concerning Burgundy Diamond Mines Limited. Forward looking statements are not statements of historical fact and actual events and results may differ materially from those described in the forward-looking statements as a result of a variety of risks, uncertainties and other factors. Forward looking statements in this document are based on Burgundy's Burgundy Diamond Mines Limited (ASX: BDM) 2 Level 25 South32 Tower, 108 St. Georges Terrace Perth, Western Australia 6000
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beliefs, opinions and estimates as of the dates the forward-looking statements are made, and no obligation is assumed to update forward looking statements if these beliefs, opinions or estimates should change or to reflect other future developments. Estimates of Mineral Resources and Ore Reserves are prepared objectively and reviewed by Competent Persons as outlined in Life of Mine Update announcement release on July 31 st , 2025. Burgundy Diamond Mines Limited (ASX: BDM) 3 Level 25 South32 Tower, 108 St. Georges Terrace Perth, Western Australia 6000