SAGUENAY, QUEBEC – (April 21, 2026) – Arianne Phosphate Inc (the “Company” or “Arianne”) (TSX VENTURE: DAN; OTCQB: DRRSF; FRANKFURT: JE9N), a development-stage phosphate mining company, advancing the Lac à Paul project in Quebec’s Saguenay-Lac-Saint-Jean region, is pleased to announce that it has entered into an option agreement for a facility to be used in the production of purified phosphoric acid (“PPA”). As announced (see Press Release dated November 6, 2025), Arianne Phosphate and Travertine Technologies are partnering to produce PPA, combining Arianne’s high-purity phosphate concentrate with Travertine’s proprietary acid production process. Situated in the Saguenay–Lac-Saint-Jean region, the option covers a portion of the infrastructure operated by Énergie Milot, a producer of thermal energy from forest biomass. Located within the Saint-Ludger-de-Milot industrial park, the site has full access to the utilities required for the proper operation of the project. “The demonstration plant is a first step towards greater production capacity,” said Raphael Gaudreault, COO of Arianne Phosphate. “By increasing the scale of production, Arianne and Travertine can show the effectiveness of the process and produce enough end-product to secure future customers. This fits with Arianne’s goal of expanding beyond being a miner of phosphate to becoming a downstream provider of