STOCKHOLDERS' EQUITY: (Tables)

12 Months Ended

Dec. 31, 2024

Share based Compensation Plan

Schedule of activity in treasury stock

Activity in treasury stock in the years 2024 and 2023 was as follows (in millions):

	2024		2023
Southern Copper common shares
Balance as of January 1,	$	2,766.6	$	2,766.9
Dividends paid in common stock		(428.9)		—
Used for corporate purposes		(0.4)		(0.3)
Balance as of December 31,		2,337.3		2,766.6
Parent Company (Grupo Mexico) common shares
Balance as of January 1,		382.4		340.7
Other activity, including dividend, interest and foreign currency transaction effect		(19.0)		41.7
Balance as of December 31,		363.4		382.4
Treasury stock balance as of December 31,	$	2,700.7	$	3,149.0

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)
May 23, 2024	0.0104	$	115.13	8,039,992	$	726.1	$	199.5
August 26, 2024	0.0056	$	106.54	4,374,118		357.4		108.5
November 21, 2024	0.0062	$	112.43	4,869,926		426.7		120.9
Total	0.0222			17,284,036	$	1,510.2	$	428.9

Schedule of activity in Directors' Stock Award Plan

	2024	2023
Total SCC shares reserved for the plan	600,000	600,000
Total shares granted at January 1,	(428,800)	(416,800)
Granted in the period	(15,600)	(12,000)
Total shares granted at December 31,	(444,400)	(428,800)
Remaining shares reserved	155,600	171,200

Employee Stock Purchase 2015 Plan

Share based Compensation Plan

Schedule of stock based compensation expense and unrecognized compensation expense

The stock-based compensation expense for the years ended December 31, 2024, 2023 and 2022 and the unrecognized compensation expense under this plan were as follows (in millions):

	2024		2023		2022
Stock based compensation expense	$	—	$	0.2	$	0.6
Unrecognized compensation expense	$	—	$	—	$	0.2

Schedule of stock award activity

		Unit Weighted Average
	Shares	Grant Date Fair Value
Outstanding shares at January 1, 2024	44,839	$	2.63
Granted	—		—
Exercised	(44,839)	$	2.63
Forfeited	—		—
Outstanding shares at December 31, 2024	—	$	—
Outstanding shares at January 1, 2023	845,895	$	2.63
Granted	—		—
Exercised	(801,056)	$	2.63
Forfeited	—		—
Outstanding shares at December 31, 2023	44,839	$	2.63

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 years ended December 31, 2024, 2023 and 2022 and the unrecognized compensation expense under this plan were as follows (in millions):

	2024		2023		2022
Stock based compensation expense	$	0.7	$	0.7	$	0.7
Unrecognized compensation expense	$	1.0	$	1.7	$	2.4

Schedule of stock award activity

		Unit Weighted Average
	Shares	Grant Date Fair Value
Outstanding shares at January 1, 2024	1,962,936	$	1.86
Granted	—		—
Exercised	(61,847)	$	1.86
Forfeited	—		—
Outstanding shares at December 31, 2024	1,901,089	$	1.86
Outstanding shares at January 1, 2023	2,754,506	$	1.86
Granted	—		—
Exercised	(791,570)	$	1.86
Forfeited	—		—
Outstanding shares at December 31, 2023	1,962,936	$	1.86