Sirios plans exploration for Quebec gold projects

Executive Summary

• Sirios Resources Inc. announced its fully funded 2026 exploration program across its gold projects in the Eeyou Istchee James Bay area of Quebec, with a primary focus on the Cheechoo project.
• The company plans an initial 25,000-meter drilling phase at Cheechoo starting in Q2 2026 to update the mineral resource estimate, followed by a second phase of at least 10,000 meters in Q1 2027 contingent on results.
• Additional work includes follow-up drilling at the Aquilon project (partnered with Sumitomo Metal Mining), compilation work at the Plex project, and a helicopter-borne magnetic survey at the newly acquired Fagnant project.

Key Details

• Cheechoo Gold Project Drilling Plan:
  • Total Initial Volume: Approximately 25,000 meters of drilling scheduled for Q2 2026.
  • Target 1: ~15,000 meters on the modelled exploration target (referenced from July 10, 2025 release).
  • Target 2: ~7,500 meters in metasediments at the northeastern contact of the main intrusive within the conceptual pit shell.
  • Target 3: ~2,500 meters in the higher-grade Eclipse sector west of the conceptual resource pit shell.
  • Objective: Update the resource estimate to facilitate a Preliminary Economic Assessment (PEA) in H1 2027.
  • Future Phase: A second phase of at least 10,000 meters planned for Q1 2027, timing contingent on Phase 1 results.
• Aquilon Project:
  • Work program planned for Q3 2026 to follow up on 2025 drilling results.
  • Program to be developed in April by Sirios and partner Sumitomo Metal Mining Canada (Sirios is operator; 49% Sirios / 51% Sumitomo).
  • Specific details to be announced upon partner confirmation.
• Plex Project:
  • Compilation work by exploration team; work plan to be developed by end of Q3 2026.
  • Objective to initiate exploration work in 2027.
  • Project spans 21,000 hectares along a greenstone belt.
  • Historical 2003 estimate: 125,000 ounces at 14.5 g/t Au (Orfee zone); noted as non-compliant with NI 43-101.
• Fagnant Project:
  • Exclusive exploration rights covering 98 square kilometres (80% of Archean volcanosedimentary belt of the Great Whale).
  • Historical showings (1997-2000) included gold/polymetallic samples up to 44 g/t Au.
  • Action: Helicopter-borne magnetic survey covering the entire property scheduled for Q2 2026.
• Marketing Agreement:
  • Entered into agreement with Resource Stock Digest (RSD) effective March 30, 2026.
  • Cost: $100,000 USD cash for a three-month advertising and marketing program.
  • Terms: RSD provides promotional services, interviews, and content distribution. No performance factors, no shares/options issued as compensation. Subject to TSX Venture Exchange approval.
• Cheechoo Resource Data (as of July 1, 2025):
  • Indicated: 35 million tonnes at 1.12 g/t Au (1,262,000 oz).
  • Inferred: 42.7 million tonnes at 1.23 g/t Au (1,688,000 oz).
  • Exploration Target: 31-40 million tonnes grading 1.27-1.45 g/t Au.

Notable Quotes

• "We're looking forward to getting drills turning at Cheechoo in the coming weeks." — Dominique Doucet, Executive Chairman and Head of Exploration
• "This comprehensive 2026 drill program at Cheechoo will enable us to publish a new resource estimate... We will then use that information to complete a preliminary economic assessment in the first half of 2027." — Jean-Felix Lepage, CEO