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v3.25.1

STOCKHOLDERS' EQUITY: (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2025
Share based Compensation Plan |
Schedule of activity in treasury stock | Activity in treasury stock in the three-month periods ended March 31, 2025 and 2024 was as follows (in millions): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2025 |  | 2024
Southern Copper common shares | ​ | ​ | ​ | ​ | ​ | ​
Balance as of January 1, | ​ | $ | 2,337.3 | ​ | $ | 2,766.7
Dividends paid in common stock | ​ |  | (143.2) | ​ |  | —
Used for corporate purposes | ​ |  | (0.1) | ​ |  | (0.1)
Balance as of March 31, | ​ |  | 2,194.1 | ​ |  | 2,766.6
​ | ​ | ​ | ​ | ​ | ​ | ​
Parent Company (Grupo Mexico) common shares | ​ | ​ | ​ | ​ | ​ | ​
Balance as of January 1, | ​ |  | 363.4 | ​ |  | 382.3
Other activity, including dividend, interest and foreign currency translation effect | ​ |  | (3.3) | ​ |  | 8.3
Balance as of March 31, | ​ |  | 360.1 | ​ |  | 390.6
Treasury stock balance as of March 31, | ​ | $ | 2,554.1 | ​ | $ | 3,157.2
Schedule of activity in Directors' Stock Award Plan | ​
​ | ​ | ​ | ​ | ​
​ |  | 2025 |  | 2024
Total SCC shares reserved for the plan |  | 600,000 |  | 600,000
Total shares granted at January 1, |  | (444,400) |  | (428,800)
Granted in the period |  | (3,200) |  | (2,800)
Total shares granted at March 31, |  | (447,600) |  | (431,600)
Remaining shares reserved |  | 152,400 |  | 168,400
Summary of non-controlling interest activity | The following table presents the non-controlling interest activity the three-month period ended March 31, 2025 and 2024 (in millions): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2025 |  | 2024
Balance as of January 1, |  | $ | 66.6 |  | $ | 63.1
Net earnings | ​ |  | 3.2 | ​ |  | 2.8
Dividend paid | ​ |  | (1.3) | ​ |  | (1.7)
Balance as of March 31, |  | $ | 68.4 |  | $ | 64.2
​
Employee Stock Purchase 2018 Plan |
Share based Compensation Plan |
Schedule of stock based compensation expense and unrecognized compensation expense | The stock based compensation expense for the three-month period ended March 31, 2025 and 2024 and the unrecognized compensation expense under this plan were as follows (in millions): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2025 | ​ | 2024
Stock based compensation expense | ​ | $ | 0.2 |  | $ | 0.2
Unrecognized compensation expense | ​ | $ | 0.8 |  | $ | 1.5
Schedule of stock award activity | ​
​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Unit Weighted Average
​ |  | Shares |  | Grant Date Fair Value
Outstanding shares at January 1, 2025 |  | 1,901,089 | $ | 1.86
Granted |  | — | $ | —
Exercised |  | (593,927) |  | 1.86
Forfeited |  | — | ​ | —
Outstanding shares at March 31, 2025 |  | 1,307,162 | $ | 1.86
Outstanding shares at January 1, 2024 | ​ | 1,962,936 | $ | 1.86
Granted | ​ | — | ​ | —
Exercised | ​ | (22,216) | ​ | 1.86
Forfeited | ​ | — | ​ | —
Outstanding shares at March 31, 2024 |  | 1,940,720 | $ | 1.86

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