Mr. Raphael Gaudreault reports

ARIANNE PHOSPHATE RECEIVES PROMISING PURIFIED PHOSPHORIC ACID PRODUCTION RATIOS

Arianne Phosphate Inc. has received very positive preliminary results from continuing testing designed to better quantify the production split of the phosphoric acid derived from the company's high-purity phosphate concentrate. Results received from Corem indicate that up to 80 per cent of the acid could be upgraded to purified phosphoric acid (PPA), a premium-priced end-product used in advanced applications such as the LFP battery and as a direct food additive.

"Phosphate concentrate can generally be processed into three major classes of acid," explained Raphael Gaudreault, chief operating officer of Arianne Phosphate. "Phosphate is best known for its use in dry-bulk fertilizers, a high-volume, lower-margin product. Beyond this however, if the underlying phosphate concentrate quality allows, higher-end products can be obtained such as good-quality green phosphoric acid used in animal feeds and specialty fertilizers, ascending through various grades of PPA, including a premium 'white acid.' The better your phosphate concentrate, the better your chances of producing a higher ratio of the premium products. These results demonstrate Arianne's ability to produce a significant volume of the premium products from our concentrate."

Demand for purified phosphoric acid has been growing rapidly as applications such as the lithium-iron-phosphate (LFP) battery have grown in popularity, putting additional strain on available supply and contributing to projected shortages by the end of this decade. Phosphate's use in agriculture and energy transition coupled with the challenging security of supply issues have led to its addition to the critical mineral lists of both Quebec and Canada in 2024 and, more recently, the United States in late 2025. Given the rare igneous nature of Arianne's phosphate deposit, the company has actively been looking to participate in the downstream production of this essential commodity and in mid-2024 released (see press releases dated June 27, 2024, and Nov. 8, 2024) a prefeasibility study on a PPA production facility that could handle the output from its fully permitted Lac a Paul mine. Since then, the company has continued working to optimize this opportunity while receiving significant support from the federal and provincial governments.

"All the ingredients are there," said Brian Ostroff, head of strategic and business initiatives at Arianne Phosphate. "Being based in Quebec, Canada, removes many of the geopolitical and supply-security issues historically associated with phosphate; the geological nature of our deposit allows us to produce a very pure phosphate concentrate and we are the only fully permitted greenfield phosphate mine in the West. These results, which further improve our product mix beyond previously released figures, could significantly enhance the economic benefits associated with our projects. Moving from roughly 65 per cent of production as white acid to approximately 80 per cent could mean greater profitability and more PPA for the expanding market."

Lastly, as noted in the Arianne's press release of March 17, 2026, the company has engaged Global One Media, an arm's-length party, to provide digital communications. The contract was signed on Feb. 20, 2026, with an effective date on March 1, 2026. Global One Media is an investor marketing firm focused on digital communications for publicly traded companies. By combining strategic narrative development, premium content creation, the firm helps issuers increase visibility, connect with investors and build sustained market awareness across North America, Europe and Asia.

About Arianne Phosphate Inc.

Arianne Phosphate is developing the Lac a Paul phosphate deposits located approximately 200 kilometres north of the Saguenay/Lac St. Jean area of Quebec, Canada. These deposits will produce a high-quality igneous apatite concentrate grading 39 per cent P2O5 with little or no contaminants (feasibility study released in 2013).

Qualified person

Raphael Gaudreault, eng, qualified person by National Instrument 43-101, has approved the technical information in this release. Mr. Gaudreault is also the company's chief operating officer.

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