Skouries Project Economic Overview

Historical Operating Results - Stratoni Q3 2021 Q2 2021 Q1 2021 Q4 2020 Q3 2020 Q2 2020 Operating Data Tonnes milled Lead head grade 13,042 47,630 47,810 48,928 43,044 45,235 5.6% 5.2% 5.3% 5.8% 5.5% 4.8% Zinc head grade 7.9% 8.1% 8.5% 9.6% 9.6% 8.9% Tonnes of concentrate produced 2,812 10,090 10,415 11,938 10,396 9,965 Tonnes of concentrate sold 927 10,188 12,922 9,250 10,749 9,388 Average realized concentrate price ($/t sold) (1) $2,011 $964 $1,063 $1,057 $896 $777 Cash operating costs ($/t of concentrate sold) $2,168 $1,293 $1,164 $1,473 $1,121 $1,352 Financial Data Concentrate revenues $1.9 $9.8 $13.7 $9.8 $9.6 $7.3 Depreciation and depletion $0.7 $0.6 $0.6 $1.1 $1.1 $1.0 Loss from mining operations ($0.9) ($4.5) ($2.2) ($5.2) ($3.7) ($6.5) Mine standby costs $7.2 Sustaining capital expenditures $1.0 $2.2 $1.5 $2.7 $1.9 $2.2 eldorado gold (1) Average realized price includes mark to market adjustments 33

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