Hecla Mining — Aug 4, 2026 release

The Company's plan at Keno Hill is to run the operation at a sustained, more modest rate, while permitting and infrastructure build-out is prioritized, as previously disclosed.   Greens Creek's gold production guidance of 51.0-55.0 koz is reiterated.   2026 Cost Guidance Revised Lower   6   Total silver cash cost and AISC guidance per silver ounce (after by-product credits) is improved to ($4.00)-($3.75)/oz and $12.50-$13.50/oz respectively. 2,3 This guidance only incorporates Greens Creek and Lucky Friday, as Keno Hill remains in a state of pre-commercial production.   • At Greens Creek, guidance for costs applicable to sales (excludes depreciation) at $240 million. Cash cost per silver ounce (after by-product credits) and AISC per silver ounce (after by-product credits) guidance is lowered to ($12.50)-($12.00) and ($4.25)-($3.75) respectively from ($9.00)-($8.25) and $0.00-$0.50 respectively. 2,3,5 • At Lucky Friday, guidance for costs applicable to sales (excludes depreciation) of $139 million. Cash cost guidance is lowered to $9.00-$9.75 from the prior $10.25-$11.00 (after by-product credits), per silver ounce, and the lower end of AISC raised to $24.50-$26.00 from $23.50-$26.00 (after by-product credits), per silver ounce to reflect the higher sustaining capital investment guidance at the mine. 2,3,5   2026 Capital and Exploration   Lower end of total capital (growth and sustaining) investment gui