Mountain Province Diamonds Announces Third Quarter 2025 Production and Sales Results

6 November 2025

Mountain Province Diamonds Inc. ("Mountain Province", the "Company")  today announces production and sales results for the third quarter ended September 30, 2025 ("the Quarter" or "Q3 2025") from the Gahcho Kué Diamond Mine ("GK Mine"). All figures are expressed in Canadian dollars unless otherwise noted.

Q3 2025 Production Takeaways
(all figures reported on a 100% basis unless otherwise stated)

• 1,000,887 carats recovered, 16% lower than Q3 2024: 1,187,912 carats.
• 1.18 Average grade of carats per tonne, a 12% decrease compared to Q3 2024: 1.24 carats per tonne.
• 807,458 ore tonnes mined; a 13% reduction compared to Q3 2024: 923,814 ore tonnes mined.
• 847,024 tonnes treated, a 12% decrease compared to Q3 2024: 961,371 tonnes treated.

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