Hecla Mining — Aug 4, 2026 release

• Greens Creek's silver production is expected to be 8.0-8.3 million ounces, raised up from the prior guidance of 7.5-8.1 million ounces. • Lucky Friday's silver production is expected to be 4.9-5.2 million ounces, tightened up from the prior 4.7-5.2 million ounces. • Keno Hill's silver production is expected to be 2.2-2.6 million ounces, lowered from the prior 2.9-3.2 million ounces. 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 lo