Hecla Mining — May 5, 2026 release

    Operational Performance: 1   • Operations: o 3.9 million ounces of silver produced, an increase of 3% compared to prior quarter. o Consolidated total cost of sales of $158 million, with silver cash cost of ($3.24) per ounce and AISC of $8.17 per ounce (both after by-product credits and excluding Keno Hill). 2,3 o Production and cost guidance reiterated. • Individual Mine Performance: o Greens Creek: Produced nearly 2.2 million ounces of silver and nearly 13 thousand ounces of gold. Total cost of sales in first quarter 2026 of $82 million, with silver cash cost of ($11.94) per ounce and AISC of ($8.39) per ounce (both after by-product credits). 2,3 This represents a dramatic improvement from the first quarter of 2025, when AISC was ($0.03) per ounce, driven by better production and significantly higher gold by-product credits reflecting the rise in realized gold prices. Greens Creek achieved a record for underground backfill placement, placing nearly 164 thousand tons in the quarter -16% above the 2025 quarterly average - enhancing operational flexibility for the remainder of the year. o Lucky Friday: Silver production of 1.2 million ounces. Total cost of sales of $49 million, with silver cash cost of $12.07 per ounce and AISC of $23.78 per ounce (both after by-product credits). 2,3 Construction of the surface cooling project continued with the project 81% complete and tracking for completion by mid-2026. o Keno Hill: Achieved its fourth consecutive positive free cash flow quarter, demonstrating Keno Hill's profitability at curre