Mountain Province Diamonds Announces Leadership and Operational Update

12 November 2025

Mountain Province Diamonds Inc. ("Mountain Province", the "Company") (TSX: MPVD) (OTC: MPVD) today announces that the President & CEO Mark Wall, has resigned from the Company to pursue other opportunities.  Mark will remain with the Company until December 19, 2025, to ensure a smooth transition.

As reported in the Company news release of November 6, 2025 regarding the Company's Q3 results, mining through the transitional phase of the high grade 5034-NEX orebody has commenced and this material is being processed.  In addition, the five -day plant maintenance shutdown was completed during Q3 and the Gahcho Kué mine ("GK Mine") is now well positioned for strong performance in Q4 2025 and 2026.