Mountain Province Diamonds Announces Change in Leadership

Mountain Province Diamonds Inc. ("Mountain Province", the "Company") (TSX & OTC: MPVD) today announces the CFO, Steven Thomas will step down as of September 1 st , 2026 to pursue other opportunities. Steve will support the Company in an advisory role through the transition process. Jonathan Comerford, the Company's Chairman, commented: " Steve has made a significant contribution to Mountain Province over the past four years and has helped guide the Company through a period of considerable change and challenge. He has been a highly professional and dedicated member of the leadership team, and I would like to personally thank him for his support and commitment. We are pleased that he will continue to assist the Company during the transition period, and we wish him every success in the next chapter of his career." About Mountain Province Diamonds Inc. Mountain Province Diamonds is a 49% participant with De Beers Canada in the Gahcho Kué diamond mine located in Canada's Northwest Territories. The Gahcho Kué Joint Venture property consists of several kimberlites that are actively being mined, developed, and explored for future development. The Company also controls more than 96,000 hectares of highly prospective mineral claims and leases surrounding the Gahcho Kué Mine that include an Indicated mineral resource for the Kelvin kimberlite and Inferred mineral resources for the Faraday kimberlites. Kelvin is estimated to contain 13.62 million carats (Mct) in 8.50 million tonnes (Mt) at a grade of 1.60 carats/tonne and value of US$63/carat. Faraday 2 is estimated to contain 5.45Mct in 2.07Mt at a grade of 2.63 carats/tonne and value of US$140/ct. Faraday 1-3 is estimated to contain 1.90Mct in 1.87Mt at a grade of 1.04 carats/tonne and value of US$75/carat. All resource estimations are based on a 1mm diamond size bottom cut-off.