First Phosphate Provides Analytical Results for Infill Drill Program at Begin-Lamarche Property

Saguenay-Lac-Saint-Jean, Québec--(Newsfile Corp. - April 27, 2026) - First Phosphate Corp. (CSE: PHOS) (OTCQX: FRSPF) (OTCQX ADR: FPHOY) (FSE: KD0) ("First Phosphate" or the "Company") is pleased to announce analytical results for its infill drill program, completed on March 31, 2026, at its Bégin-Lamarche property in Saguenay-Lac-Saint-Jean, Québec, Canada. As previously announced, the Company's recent infill drilling campaign across the three major zones (Mountain, North and South) has confirmed extensive, continuous mineralization throughout the existing horizon of the initial Mineral Resource Estimate ("MRE") as well as two new phosphate intersects.