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SEGMENT AND RELATED INFORMATION: (Details) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2026 USD ($) | Jun. 30, 2025 USD ($) | Jun. 30, 2026 USD ($) segment | Jun. 30, 2025 USD ($) | Dec. 31, 2025 USD ($)
Financial information related to segments |  |  |  |  |
Number of reportable segments | segment |  |  | 3 |  |
Financial information relating to segments |  |  |  |  |
Net sales | $ 4,289.0 | $ 3,051.0 | $ 8,540.4 | $ 6,172.9 |
Cost of sales (exclusive of depreciation, amortization and depletion) | 1,389.5 | 1,211.7 | 2,888.3 | 2,530.9 |
Selling, general and administrative | 35.3 | 32.5 | 71.1 | 64.1 |
Depreciation, amortization and depletion | 226.0 | 206.2 | 451.7 | 430.0 |
Exploration | 14.9 | 13.7 | 25.7 | 25.4 |
Operating income | 2,623.2 | 1,587.0 | 5,103.6 | 3,122.5 |
Interest, net | (30.6) | (40.8) | (73.6) | (84.1) |
Other income (expense) | 6.8 | (2.3) | 13.6 | (16.0) |
Income before income taxes | 2,599.4 | 1,543.9 | 5,043.5 | 3,022.4 |
Capital investment | 422.8 | 235.7 | 864.7 | 553.5 |
Property and mine development, net | 10,662.0 | 9,915.0 | 10,662.0 | 9,915.0 | $ 10,272.2
Total assets | 24,127.7 | 19,554.7 | 24,127.7 | 19,554.7 | $ 21,381.4
Operating segment |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | 4,364.3 | 3,112.3 | 8,707.7 | 6,283.1 |
Cost of sales (exclusive of depreciation, amortization and depletion) | 1,470.5 | 1,285.7 | 3,066.2 | 2,662.8 |
Selling, general and administrative | 32.6 | 29.9 | 65.5 | 58.5 |
Depreciation, amortization and depletion | 215.9 | 193.4 | 431.9 | 405.4 |
Exploration | 10.7 | 13.5 | 17.5 | 21.0 |
Operating income | 2,634.6 | 1,589.8 | 5,126.7 | 3,135.3 |
Capital investment | 421.3 | 234.4 | 861.0 | 550.6 |
Property and mine development, net | 10,187.7 | 9,470.3 | 10,187.7 | 9,470.3 |
Total assets | 18,092.7 | 15,577.4 | 18,092.7 | 15,577.4 |
Corporate, Other & Eliminations |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | (75.4) | (61.3) | (167.3) | (110.2) |
Cost of sales (exclusive of depreciation, amortization and depletion) | (80.9) | (74.0) | (177.9) | (132.0) |
Selling, general and administrative | 2.8 | 2.6 | 5.7 | 5.6 |
Depreciation, amortization and depletion | 10.1 | 12.8 | 19.8 | 24.5 |
Exploration | 4.1 | 0.1 | 8.2 | 4.4 |
Operating income | (11.4) | (2.8) | (23.1) | (12.8) |
Capital investment | 1.5 | 1.2 | 3.7 | 2.9 |
Property and mine development, net | 474.3 | 444.6 | 474.3 | 444.6 |
Total assets | 6,035.1 | 3,977.3 | 6,035.1 | 3,977.3 |
Reportable subsegments |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | 4,289.0 | 3,051.0 | 8,540.4 | 6,172.9 |
Reportable subsegments | Operating segment |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | 4,289.0 | 3,051.0 | 8,540.4 | 6,172.9 |
Intersegment sales |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales |  | 0.0 |  | 0.0 |
Intersegment sales | Operating segment |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | 75.4 | 61.3 | 167.3 | 110.2 |
Intersegment sales | Corporate, Other & Eliminations |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | (75.4) | (61.3) | (167.3) | (110.2) |
Mexican Open-pit | Operating segment |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | 2,511.9 | 1,754.8 | 4,955.5 | 3,504.2 |
Cost of sales (exclusive of depreciation, amortization and depletion) | 761.6 | 650.7 | 1,649.7 | 1,318.7 |
Selling, general and administrative | 23.4 | 17.2 | 40.3 | 34.1 |
Depreciation, amortization and depletion | 115.4 | 96.5 | 225.0 | 194.2 |
Exploration | 0.9 | 1.5 | 2.2 | 2.7 |
Operating income | 1,610.7 | 988.9 | 3,038.2 | 1,954.4 |
Capital investment | 137.4 | 148.6 | 307.9 | 283.2 |
Property and mine development, net | 5,138.0 | 4,899.5 | 5,138.0 | 4,899.5 |
Total assets | 9,287.6 | 9,072.7 | 9,287.6 | 9,072.7 |
Mexican Open-pit | Reportable subsegments | Operating segment |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | 2,505.5 | 1,754.8 | 4,938.4 | 3,504.2 |
Mexican Open-pit | Intersegment sales | Operating segment |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | 6.4 |  | 17.0 |  |
Mexican IMMSA Unit | Operating segment |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | 267.9 | 179.3 | 586.5 | 334.7 |
Cost of sales (exclusive of depreciation, amortization and depletion) | 155.6 | 134.1 | 305.4 | 246.1 |
Selling, general and administrative | (1.3) | 3.0 | 4.3 | 5.8 |
Depreciation, amortization and depletion | 20.9 | 20.8 | 41.4 | 40.6 |
Exploration | 4.7 | 3.6 | 6.6 | 6.1 |
Operating income | 88.0 | 17.8 | 228.8 | 36.2 |
Capital investment | 37.0 | 23.9 | 70.5 | 45.3 |
Property and mine development, net | 831.2 | 780.5 | 831.2 | 780.5 |
Total assets | 1,606.7 | 1,244.7 | 1,606.7 | 1,244.7 |
Mexican IMMSA Unit | Reportable subsegments | Operating segment |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | 199.0 | 118.0 | 436.2 | 224.5 |
Mexican IMMSA Unit | Intersegment sales | Operating segment |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | 69.0 | 61.3 | 150.3 | 110.2 |
Peruvian Operations | Operating segment |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | 1,584.4 | 1,178.2 | 3,165.8 | 2,444.2 |
Cost of sales (exclusive of depreciation, amortization and depletion) | 553.3 | 500.9 | 1,111.1 | 1,098.0 |
Selling, general and administrative | 10.4 | 9.7 | 20.8 | 18.7 |
Depreciation, amortization and depletion | 79.7 | 76.1 | 165.6 | 170.7 |
Exploration | 5.1 | 8.4 | 8.6 | 12.2 |
Operating income | 935.9 | 583.1 | 1,859.6 | 1,144.6 |
Capital investment | 246.9 | 61.9 | 482.6 | 222.1 |
Property and mine development, net | 4,218.4 | 3,790.3 | 4,218.4 | 3,790.3 |
Total assets | 7,198.4 | 5,260.0 | 7,198.4 | 5,260.0 |
Peruvian Operations | Reportable subsegments | Operating segment |  |  |  |  |
Financial information relating to segments |  |  |  |  |
Net sales | $ 1,584.4 | $ 1,178.2 | $ 3,165.8 | $ 2,444.2 |

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