Taseko Mines

The Company is subject to customary restrictions on asset sales, the issuance of preferred shares, dividends and other restricted payments.

SEC original ↗Taseko Mines — Earnings release (6-K exhibit)EX-99Aug 6, 2026

Florence Financings Florence Copper Stream On December 19, 2022, the Company formed a strategic partnership with Mitsui to develop the Florence Copper project, which includes a copper stream arrangement (the "Copper Stream"), an equity conversion option, and a buyback option.

SEC original ↗Taseko Mines — Earnings release (6-K exhibit)EX-99Aug 6, 2026

If not exercised, the Company may repurchase the stream under the buyback option through a cash payment to Mitsui that would provide an internal rate of return of 10% on the stream deposits advanced (the "Buy Back Option").

SEC original ↗Taseko Mines — Earnings release (6-K exhibit)EX-99Aug 6, 2026

During the six months ended June 30, 2026, the Company also capitalized start-up and commissioning costs of $21,153 and interest on borrowings of $7,221.

SEC original ↗Taseko Mines — Earnings release (6-K exhibit)EX-99Aug 6, 2026

During the three and six months ended June 30, 2025, the Company capitalized development costs of $58,794 and $142,021, respectively, and interest on borrowings of $7,537 and $13,293, respectively, in connection with the Florence Copper project.

SEC original ↗Taseko Mines — Earnings release (6-K exhibit)EX-99Aug 6, 2026

The liens on the collateral securing the notes and the guarantees rank behind the liens securing the revolving credit facility.

SEC original ↗Taseko Mines — Earnings release (6-K exhibit)EX-99Aug 6, 2026

Florence Financings Florence Copper Stream On December 19, 2022, the Company formed a strategic partnership with Mitsui to develop the Florence Copper project, which includes a copper stream arrangement (the "Copper Stream"), an equity conversion option, and a buyback option.

SEC original ↗Taseko Mines — Earnings release (6-K exhibit)EX-99Aug 6, 2026

The Company has certain financial assets and liabilities that are measured at fair value on a recurring basis, either at fair value through profit or loss ("FVPL") or fair value through other comprehensive income ("FVOCI"), and uses the fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value, with Level 1 inputs having the highest priority.

SEC original ↗Taseko Mines — Earnings release (6-K exhibit)EX-99Aug 6, 2026

These activities primarily comprise corporate development initiatives and centralized functions that provide administrative, technical, financial, and other support to the operating segments.

SEC original ↗Taseko Mines — Earnings release (6-K exhibit)EX-99Aug 6, 2026

Drilling and expansion of the wellfield will continue in 2026 to support the ongoing ramp-up of copper production at Florence; In July 2026, the Company submitted a Detailed Project Description ("DPD") for the Yellowhead project to the BC Environmental Assessment Office ("BC EAO").

SEC original ↗Taseko Mines — Earnings release (6-K exhibit)EX-99Aug 6, 2026

The Company has copper put options at US$4.75 per pound for 27 million pounds of copper production for the fourth quarter of 2026 (refer to "Financial Condition Review-Hedging Strategy" for details).

SEC original ↗Taseko Mines — Earnings release (6-K exhibit)EX-99Aug 6, 2026

There have been no significant changes in accounting policy judgments or key sources of estimation uncertainty during the six months ended June 30, 2026.

SEC original ↗Taseko Mines — Earnings release (6-K exhibit)EX-99Aug 6, 2026

Further information concerning risks and uncertainties associated with these forward-looking statements and our business may be found in the Company's other public filings with the SEC and Canadian provincial securities regulatory authorities.

SEC original ↗Taseko Mines — Earnings release (6-K exhibit)EX-99Aug 6, 2026

The Te tan Biny Agreement ended litigation among the parties while providing certainty with respect to how the significant copper-gold resource at New Prosperity may be developed in the future.

SEC original ↗Taseko Mines — Earnings release (6-K exhibit)EX-99Aug 6, 2026

Copper prices on the London Metal Exchange ("LME") are currently around US$6.45 per pound compared to US$6.05 per pound at June 30, 2026 and the second quarter average of US$6.05 per pound, while COMEX prices continue to trade at a premium due to US tariff-related market pressures.

SEC original ↗Taseko Mines — Earnings release (6-K exhibit)EX-99Aug 6, 2026

At the same time, tighter long-term supply conditions are expected to continue due to production challenges at large mines, declining ore grades and few available sources of significant new primary copper supply.

SEC original ↗Taseko Mines — Earnings release (6-K exhibit)EX-99Aug 6, 2026

A material and sustained increase in oil prices will increase the Company's operating costs, which could adversely affect profitability and cash flows.

SEC original ↗Taseko Mines — Earnings release (6-K exhibit)EX-99Aug 6, 2026