Ero Copper Corp.
For the period ended Sep 30, 2026. Filed Nov 2, 2026.
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Sep 30, 2026 · Filed Nov 2, 2026
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Contents
EX-99.1 · Operating Highlights
Operating Highlights
| 2026 - Q3 | 2026 - Q2 | 2025 - Q3 | 2026 - YTD | 2025 - YTD | |
|---|---|---|---|---|---|
| Copper (Caraíba Operations) | |||||
| Ore Processed (tonnes) | 1,161,102 | 1,074,182 | 996,661 | 3,307,493 | 2,481,508 |
| Grade (% Cu) | 0.90 | 0.87 | 1.01 | 0.90 | 1.14 |
| Cu Production (tonnes) | 9,387 | 8,351 | 9,085 | 26,564 | 25,604 |
| Cu Production (lbs) | 20,694,259 | 18,410,934 | 20,029,832 | 58,563,914 | 56,447,924 |
| Cu Sold in Concentrate (tonnes) | 9,537 | 7,926 | 9,080 | 26,668 | 25,416 |
| Cu Sold in Concentrate (lbs) | 21,025,970 | 17,473,566 | 20,016,537 | 58,793,094 | 56,031,397 |
| Cu C1 Cash Cost(1) | $2.89 | $2.76 | $2.32 | $2.81 | $2.20 |
| Copper (Tucumã Operation) | |||||
| Ore Processed (tonnes) | 814,137 | 715,415 | 575,041 | 2,093,269 | 1,288,054 |
| Grade (% Cu) | 1.30 | 1.44 | 1.51 | 1.44 | 1.74 |
| Cu Production (tonnes) | 8,958 | 8,964 | 7,579 | 26,383 | 18,997 |
| Cu Production (lbs) | 19,749,378 | 19,762,521 | 16,707,162 | 58,164,304 | 41,880,323 |
| Cu Sold in Concentrate (tonnes) | 8,638 | 8,581 | 6,622 | 25,970 | 17,758 |
| Cu Sold in Concentrate (lbs) | 19,043,817 | 18,918,156 | 14,597,738 | 57,254,133 | 39,148,894 |
| Cu C1 Cash Cost(1)(2) | $2.12 | $2.10 | $1.62 | $2.07 | $1.62 |
| Total Copper | |||||
| Cu Production (tonnes) | 18,345 | 17,315 | 16,664 | 52,947 | 44,601 |
| Cu Production (lbs) | 40,443,637 | 38,173,455 | 36,736,994 | 116,728,218 | 98,328,247 |
| Cu Sold in Concentrate (tonnes) | 18,175 | 16,507 | 15,702 | 52,638 | 43,174 |
| Cu Sold in Concentrate (lbs) | 40,069,787 | 36,391,722 | 34,614,275 | 116,047,227 | 95,180,291 |
| Realized Copper Price(1) | $6.21 | $5.78 | $4.29 | $5.84 | $4.17 |
| Cu C1 Cash Cost(1)(2) | $2.51 | $2.42 | $2.00 | $2.43 | $2.07 |
| Gold (Xavantina Operations) | |||||
| Ore Processed (tonnes) | 55,478 | 48,564 | 47,865 | 141,170 | 118,922 |
| Grade (g / tonne) | 4.90 | 6.20 | 8.15 | 5.55 | 7.46 |
| Au Production (oz) | 7,844 | 8,693 | 9,073 | 22,032 | 23,454 |
| Historic Au Concentrate Recovered (oz) | 17,414 | 11,860 | — | 31,386 | — |
| Total Au (oz) | 25,258 | 20,553 | 9,073 | 53,418 | 23,454 |
| Au Sold in Doré (oz) | 4,949 | 6,663 | 8,439 | 17,631 | 22,549 |
| Au Sold in Concentrate (oz)(3) | 20,008 | 10,353 | — | 34,672 | — |
| Au Sold (oz) | 24,957 | 17,016 | 8,439 | 52,303 | 22,549 |
| Au Production C1 Cash Cost(1) | $1,892 | $1,586 | $1,086 | $1,828 | $1,100 |
| Au Production AISC(1) | $3,607 | $2,881 | $2,425 | $3,528 | $2,307 |
(2) The Company declared commercial production at the Tucumã Operation effective July 1, 2025. As such, copper C1 cash costs for Tucumã and consolidated copper operations reflect only Tucumã's costs from Q3 2025 onward.
(3) Gold sold in concentrate includes gold ounces produced in flotation and the historic gold concentrate stockpiles.
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