Progress on Florence Copper Operations

The completion of essential construction activities at Florence Copper marks a significant milestone for Taseko. Wellfield acidification began in early November, with mining solutions circulating in all new production wells by December. Injection flow rates in the wellfield have consistently met or exceeded expectations, resulting in an accelerated acidification process. Notably, the average copper recovery grade from the recovery wells has reached levels necessary for SX/EW plant operations.

Stuart McDonald, President and CEO of Taseko, stated, “The transition from construction to early-stage operations at Florence has gone smoothly, and we are very pleased with the initial copper recoveries and performance of the commercial wellfield. Our project team is focused on the successful start-up of the SX/EW plant in the coming days, followed by first copper cathode production within a few weeks.”

Gibraltar Mine Production Overview

In 2025, Taseko's Gibraltar Mine achieved notable copper and molybdenum production figures, with outputs of 98 million pounds of copper and 1.9 million pounds of molybdenum. For the year, sales included 99 million pounds of copper and 1.9 million pounds of molybdenum. The fourth quarter saw a substantial increase in copper production, hitting 31 million pounds, compared to previous quarters.

• Copper head grade for Q4 was 0.26%, consistent with management expectations.
• Overall recoveries reached 81% during the same period.
• Molybdenum production for the fourth quarter was 0.8 million pounds, marking a dramatic increase of approximately 50% over Q3 and achieving the best quarterly results in eight years.
• The SX/EW plant at Gibraltar produced 0.9 million pounds of copper cathode in Q4 and continues to operate steadily.

Mr. McDonald remarked on Gibraltar’s production improvement, “Gibraltar production in the second half of the year was a notable improvement over the first half of the year with higher grades and better quality ore. Looking ahead to 2026, we expect more consistent quarterly production, now that we are better situated in the Connector pit, and higher overall copper production.”

Forward-Looking Statements and Caution

This release contains forward-looking statements based on Taseko’s expectations, estimates, and projections. These statements are often characterized by terms such as “outlook,” “anticipate,” “project,” and similar expressions. Various risks and uncertainties may cause actual results to differ materially from those projected, including:

• Fluctuations in copper and other metal prices.
• Changes in economic conditions and financial markets affecting operating costs.
• Uncertainties related to achieving production estimates at Gibraltar and Florence Copper.
• Compliance with governmental regulations and project financing requirements.
• Risks associated with mining operations and the ability to maintain production levels amid potential downtimes.

Investors and stakeholders are encouraged to review these factors carefully before making any investment decisions regarding Taseko (TGB).

Contact Information

For more information about Taseko, please visit tasekomines.com or contact:

Brian Bergot, Vice President, Investor Relations – 778-373-4554

Stuart McDonald, President and CEO