X0508 4 2024-06-21 0 0000719413 HECLA MINING CO/DE/ HL 0001481905 Sienko David C 6500 N. MINERAL DRIVE, SUITE 200 COEUR D'ALENE ID 83815 0 1 0 0 VP - General Counsel 0 Common Stock 2024-06-25 4 S 0 14559 4.905 D 996123 D Common Stock 2024-06-21 4 A 0 60479 5.17 A 996123 D Common Stock 2024-06-21 4 J 0 12390 0 A 12390 I Held in 401(k) Plan Account Performance rights 0 2024-06-21 4 A 0 60479 0 A 2027-01-01 2027-01-01 Common Stock 60479 996123 D Mr. Sienko was awarded (i) 19,036 restricted stock units on June 21, 2021, (ii) 38,374 restricted stock units on June 21, 2022, and (iii) 35,350 restricted stock units on June 21, 2023. The restrictions lapsed on 1/3 of those vesting units (30,920 shares). To cover his tax liability, Hecla Mining Company sold 14,559 shares. Consists of 788,968 shares held directly, 110,319 performance-based shares, and 96,836 unvested restricted stock units. Award of restricted stock units that vest as follows: 20,159 shares on June 21, 2025; 20,160 shares on June 21, 2026; and 20,160 shares on June 21, 2027. See footnote 2. Held as 1,032.647 units in Mr. Sienko's 401(k) account under the Hecla Mining Company Capital Accumulation Plan, and estimated to be 12,390 shares. Mr. Sienko was awarded performance rights representing the contingent right to receive between $78,169 and $625,350 worth of Hecla Mining Company common stock based on Hecla Mining Company's Total Shareholder Return performance over the 3-year period (January 1, 2024 to December 31, 2026) relative to our peers. Examples of the potential grant of shares to Mr. Sienko under this plan are as follows: 100th percentile rank among peers = maximum award at 200% of target ($625,350 in stock); 50th percentile rank among peers = target award at grant value ($312,675 in stock), and 25th percentile rank among peers = threshold award at 25% of target ($78,169 in stock). See footnote 2. Tami D. Whitman, Attorney-in-Fact for David C. Sienko 2024-06-25