STOCKHOLDERS'EQUITY: (Tables)
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6 Months Ended |
Jun. 30, 2026 |
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| STOCKHOLDERS'EQUITY: |
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| Schedule of activity in treasury stock |
Activity in treasury stock in the six-month periods ended June 30, 2026 and 2025 was as follows (in millions): | | | | | | | | | 2026 | | 2025 | Southern Copper common shares | | | | | | | Balance as of January 1, | | $ | 1,625.4 | | $ | 2,337.3 | Dividends paid in common stock | | | (377.8) | | | (338.8) | Used for corporate purposes | | | (0.2) | | | (0.2) | Balance as of June 30, | | | 1,247.4 | | | 1,998.4 | | | | | | | | Parent Company (Grupo Mexico) common shares | | | | | | | Balance as of January 1, | | | 408.8 | | | 363.4 | Other activity, including dividend, interest and foreign currency translation effect | | | 25.9 | | | 10.2 | Balance as of June 30, | | | 434.7 | | | 373.5 | Treasury stock balance as of June 30, | | $ | 1,682.1 | | $ | 2,371.9 |
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| Schedule of Stock dividend activity |
| | | | | | | | | | | | | | | | | | | | | Total | | Effect in | | | | | | Common stock | | Average | | Number of | | Additional | | Effect in | | | dividend | | Market price | | Shares Paid | | Paid-in capital | | Treasury Stock | Date of payment | | per share | | per share | | as Dividends | | ($ in millions) | | ($ in millions) | February 27, 2026 | | 0.0085 | | $ | 179.93 | | 6,961,959 | | $ | 1,079.9 | | $ | 172.8 | May 29, 2026 | | 0.0100 | | $ | 187.45 | | 8,260,265 | | | 1,343.4 | | | 205.0 | Total | | 0.0185 | | | | | 15,222,224 | | $ | 2,423.3 | | $ | 377.8 |
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| Schedule of activity in Directors' Stock Award Plan |
| | | | | | | 2026 | | 2025 | Total SCC shares reserved for the plan | | 600,000 | | 600,000 | Total shares granted at January 1, | | (457,200) | | (444,400) | Granted in the period | | (8,000) | | (6,400) | Total shares granted at June 30, | | (465,200) | | (450,800) | Remaining shares reserved | | 134,800 | | 149,200 |
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| Summary of non-controlling interest activity |
The following table presents the non-controlling interest activity for the six-month periods ended June 30, 2026 and 2025 (in millions): | | | | | | | | | 2026 | | 2025 | Balance as of January 1, | | $ | 66.8 | | $ | 66.6 | Net earnings | | | 9.6 | | | 6.4 | Dividend paid | | | — | | | (4.4) | Balance as of June 30, | | $ | 76.4 | | $ | 68.6 |
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| Employee Stock Purchase 2018 Plan |
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| STOCKHOLDERS'EQUITY: |
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| Schedule of stock based compensation expense and unrecognized compensation expense |
The stock based compensation expense for the six-month periods ended June 30, 2026 and 2025 and the unrecognized compensation expense under this plan were as follows (in millions): | | | | | | | | | 2026 | | 2025 | Stock based compensation expense | | $ | 0.3 | | $ | 0.3 | Unrecognized compensation expense | | $ | — | | $ | 0.7 |
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| Schedule of stock award activity |
| | | | | | | | | | Unit Weighted Average | | | Shares | | Grant Date Fair Value | Outstanding shares at January 1, 2026 | | 1,202,943 | | $ | 1.86 | Granted | | — | | | — | Exercised | | (20,302) | | $ | 1.86 | Forfeited | | — | | | — | Outstanding shares at June 30, 2026 | | 1,182,641 | | $ | 1.86 | Outstanding shares at January 1, 2025 | | 1,901,089 | | $ | 1.86 | Granted | | — | | | — | Exercised | | (602,500) | | $ | 1.86 | Forfeited | | — | | | — | Outstanding shares at June 30, 2025 | | 1,298,589 | | $ | 1.86 |
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| Employee Stock Purchase 2025 Plan |
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| STOCKHOLDERS'EQUITY: |
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| Schedule of stock based compensation expense and unrecognized compensation expense |
The stock-based compensation expense and the unrecognized compensation expense under this plan for the six-month periods ended June 30, 2026 and 2025 were as follows (in millions): | | | | | | | | | 2026 | | 2025 | Stock based compensation expense | | $ | 0.3 | | $ | — | Unrecognized compensation expense | | $ | 3.8 | | $ | — |
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| Schedule of stock award activity |
| | | | | | | | | | Unit Weighted Average | | | Shares | | Grant Date Fair Value | Outstanding shares at January 1, 2026 | | 2,496,658 | | $ | 4.51 | Granted | | — | | | — | Exercised | | — | | | — | Forfeited | | (79,443) | | | 4.51 | Outstanding shares at June 30, 2026 | | 2,417,215 | | $ | 4.51 | Outstanding shares at January 1, 2025 | | — | | $ | — | Granted | | 2,372,449 | | $ | 4.51 | Exercised | | — | | | — | Forfeited | | — | | | — | Outstanding shares at June 30, 2025 | | 2,372,449 | | $ | 4.51 |
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