Manhattan Uranium Identifies High-Grade Uranium Intercepts from 5,668-Hole Database Compilation at I-70, San Rafael District, Utah

72% of Drilled Holes Return Uranium Mineralization; 3D Drill Targets Generated Across Historical Utah Uranium District Vancouver, British Columbia--(Newsfile Corp. - July 23, 2026) - Manhattan Uranium Discovery Corp. (TSXV: MANU) (OTC Pink: MAUUF) (FSE: JB50) (" Manhattan " or the " Company ") is pleased to provide an update on ongoing technical work at its I-70 uranium project (the "I -70 Project " or " I-70 "), located in the San Rafael uranium district of Utah. The Company has completed a major historical data compilation and digitization effort focused on building a modern drillhole and geological database for the I-70 Project. The I-70 Project is located within the prolific Colorado Plateau uranium province and is permitted for underground mining.

The Company believes this systematic compilation of historical data represents a critical step toward defining modern drill targets within a recognized uranium belt with established infrastructure. Program Highlights Major Database Established: Manhattan has consolidated approximately 5,668 historical drill collar locations from legacy project maps into a modern validated drillhole database. The compilation includes 4,550 historical gamma-equivalent uranium intervals across 2,769 drill holes, while additional non-assay interval coding was generated for modeling purposes to support geological correlation, barren/mineralized zone interpretation, and drill targeting.

Pervasive Uranium Mineralization Confirmed: Of 2,769 drill holes for which gamma data has been recovered to date, approximately 1,985 holes, or 72%, contain at least one historical gamma-equivalent interval of 0.10% eU₃O₈ or greater, demonstrating the widespread nature of uranium mineralization across the I-70 Project. High-Grade Intercepts Recovered: Numerous high-grade historical intercepts have been identified th