Mr. Raphael Gaudreault reports

ARIANNE PHOSPHATE SUCCESSFULLY PRODUCES PHOSPHORIC ACID ON A CONTINUOUS BASIS

Arianne Phosphate Inc. has successfully produced phosphoric acid on a continuous basis using the company's high-purity phosphate concentrate. This accomplishment marks the first time phosphoric acid has been continuously produced in the province from a Quebec-sourced apatite concentrate in over 130 years. This work was done in partnership with Corem and with the support of Natural Resources Canada (NRCan).

"The importance of phosphate continues to grow while, at the same time, supply chains are increasingly threatened by geopolitical events," said Raphael Gaudreault, chief operating officer of Arianne Phosphate. "This breakthrough is yet another example of the quality of our phosphate concentrate and demonstrates the opportunity for a fully localized phosphate supply chain here in Quebec, Canada, that could end a century of dependence on imported rock. Further, much of the world is now questioning its supply chains and this work shows how Arianne will be an important and trusted partner to the West for this critical material. This work strengthens Canada's critical minerals strategy, secures domestic feedstock and positions Quebec as the North American leader in the green energy transition."

During tests performed at Corem, the company produced roughly 1.5 tonnes of phosphoric acid on a continuous basis over a one-week period. Due to the nature of Arianne's phosphate concentrate, the phosphoric acid produced is easily upgraded to a purified phosphoric acid (see press release dated April 9, 2026), the material required for the LFP (lithium-iron-phosphate) battery industry as well as high-performance fertilizers, pharmaceuticals and semiconductor production. Additionally, Arianne's phosphate concentrate requires considerably less sulphuric acid to produce its phosphoric acid, another significant advantage as almost 50 per cent of sulphur flows through the Strait of Hormuz.

"For many years the supply of phosphate was taken for granted with few questioning accesses to this critical material," said Brian Ostroff, head of strategic and business initiatives. "Despite these headwinds, Arianne spent $100-million and over 15 years advancing its Lac a Paul project. Today, Arianne owns the world's largest greenfield phosphate deposit that can produce a very pure phosphate concentrate and is the West's only permitted phosphate mine. With government, industry and investors now understanding this challenging macro, the importance of Arianne should be underscored."

Adoption of semi-annual financial reporting

Additionally, the company announces adoption of semi-annual financial reporting (SAR). This news release is being issued and filed pursuant to Coordinated Blanket Order 51-933, Exemptions to Permit Semi-Annual Reporting for Certain Venture Issuers.

CBO 51-933 allows eligible venture issuers to voluntarily move from a quarterly to a semi-annual financial reporting framework. By adopting SAR, Arianne aims to reduce the administrative and financial burden of quarterly reporting. As a result of adopting SAR, the company will not file interim financial statements and related management discussion and analysis (MD&A) for the three-month period ending March 31 and the nine-month period ending Sept. 30 of each applicable fiscal year. Accordingly, the initial interim period for which the company does not intend to file an interim financial report and related MD&A will be for the three months ended March 31, 2026. Arianne will continue to file audited annual financial statements (due within 120 days of Dec. 31) and six-month interim financial reports and related MD&A (due within 60 days of June 30). The company remains committed to timely and transparent disclosure and will continue to report all material changes and significant developments as required under National Instrument 51-102, Continuous Disclosure Obligations.

Clarification regarding bonus warrants issued under the credit facility extension

Reference is made to Arianne's press release dated April 1, 2026, announcing the closing on agreement to extend its credit facilities. The company confirms that the restriction to exercise the 25 million 2026 warrants (as defined in the press release) if such exercise would result in the Lender (as defined in the press release) holding, on a partially-diluted basis, more than 19.9 per cent of the issued and outstanding common shares of Arianne also applies in the case of a business combination transaction (as defined in the press release) and, as a result, the exercise of the 2026 bonus warrants remains subject to the approval of the TSX Venture Exchange and, if required by the exchange, of the disinterested shareholders of the company.

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 (phosphorus pentoxide) with little or no contaminants (feasibility study released in 2013).

Qualified person

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

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