Cameco Publishes McArthur River Operations Technical Report Effective September 30, 2026

• Cameco's McArthur River technical report, effective September 30, 2026, estimates attributable uranium reserves of 241,400,000 pounds.
• Production is projected to reach 22,000,000 pounds annually by 2030, supporting an estimated remaining mine life of 17 years.
• Average operating costs rise to CAD 24.03 per pound from CAD 14.97 in the 2018 technical report.
• Attributable remaining life-of-mine capital costs increase to CAD 1.47 billion from CAD 658 million, reflecting inflation and expanded production flexibility.
• Estimated pretax net present value totals CAD 5.86 billion at an 8% discount rate; pretax internal rate of return reaches 11.9%.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Cameco Corporation published the original content used to generate this news brief via EDGAR, the Electronic Data Gathering, Analysis, and Retrieval system operated by the U.S. Securities and Exchange Commission (Ref. ID: 0001193125-26-447681), on November 04, 2026, and is solely responsible for the information contained therein.