Sirios Resources drills 4.8 m of 2.55 g/t Au at Aquilon

Executive Summary

• Sirios Resources Inc. released assay results from its 2025 summer diamond drilling campaign at the Aquilon gold project in Quebec, identifying a high-potential, strongly anomalous gold halo in the previously underexplored western sector.
• The discovery is defined by 538 core samples from six drill holes, revealing a north-south-trending corridor dipping eastward that extends over one kilometre in length and remains open in all directions.
• Local gold grades reached up to 10.3 g/t Au, with a weighted average grade of 0.26 g/t Au across the halo; an additional infill sampling program of 1,496 metres has been completed to refine the corridor's geometry.

Key Details

• Drilling Campaign Overview: 13 drill holes totalling 5,420 metres were completed in the summer of 2025 in the western sector of the Aquilon project.
• Halo Characteristics: The anomalous zone extends over more than one kilometre in length and several hundred metres in width, hosted in felsic volcanic rocks. It is defined by 538 core samples from six drill holes, covering 601 metres of discontinuous intervals.
• Grading: Gold grades are locally up to 10.3 grams per tonne (g/t) Au, with a weighted average grade of 0.26 g/t Au across the halo.
• Key Drill Intervals:
  • Hole AQ25-119: 2.55 g/t Au over 4.8 m, including 10.3 g/t Au over 1.0 m; 5.51 g/t Au over 1.0 m; 2.34 g/t Au over 1.1 m; 0.95 g/t Au over 3.7 m, including 2.32 g/t Au over 0.9 m.
  • Hole AQ25-118: 1.12 g/t Au over 4.0 m, including 3.01 g/t Au over 1.0 m; 2.85 g/t Au over 1.2 m; 0.92 g/t Au over 5.1 m, including 2.31 g/t Au over 1.1 m; 1.08 g/t Au over 4.0 m, including 2.81 g/t Au over 1.0 m.
  • Hole AQ25-113: 2.78 g/t Au over 1.2 m.
  • Hole AQ25-123: 2.09 g/t Au over 1.0 m.
• Follow-up Sampling: An additional core sampling program totalling 1,496 metres was completed to infill unsampled intervals within the gold corridor to refine geometry and average grades.
• Project Context: The western sector was identified as a priority area following 2023 and 2024 gold-in-soil anomalies, integrated with geological interpretation and a 2025 high-resolution drone magnetic survey.
• Financing/Interest: The drilling program is financed by Sumitomo Metal Mining Canada (Sumitomo). By completing this program, Sumitomo is entitled to gain a 51% interest in the Aquilon project, as its commitment exceeds $4.8 million.
• Historical Context: The Aquilon project consists of 140 mineral claims covering 68 square kilometres. Notable historical high-grade intercepts include 12,906.5 g/t Au over 0.2 m (Lingo showing), 3,527.4 g/t Au over 0.4 m (Moman showing), and 133.67 g/t Au over 0.8 m (Fleur-de-Lys showing).
• Assay Methodology: Gold assays were performed by ALS Global using fire assay with an atomic absorption finish on a 50-gram subsample. Samples >1 g/t Au or containing visible gold were reassayed by fire assay with metallic screening on a one-kilogram sample.

Notable Quotes

• Dominique Doucet, PEng, and Roger Moar, PGeo, qualified persons under National Instrument 43-101, have reviewed and approved the scientific and technical information in this press release.