First Phosphate Reports Updated Mineral Resource Estimate for Bégin-Lamarche Phosphate Deposit

Saguenay, Quebec--(Newsfile Corp. - May 26, 2026) - First Phosphate Corp (CSE: PHOS) (OTCQX: FRSPF) (OTCQX ADR: FPHOY) (FSE: KD0) ("First Phosphate" or the "Company")  is pleased to announce the results of its updated Mineral Resource Estimate ("MRE") for its Bégin-Lamarche project in Saguenay-Lac-Saint-Jean, Québec, Canada. The updated MRE includes results from the 2025-2026 drilling program described in the Company's press release dated April 27, 2026.