STOCKHOLDERS' EQUITY: (Tables)

9 Months Ended

Sep. 30, 2024

Share based Compensation Plan

Schedule of activity in treasury stock

Activity in treasury stock in the nine-month period ended September 30, 2024 and 2023 is as follows (in millions):

	2024		2023
Southern Copper Corporation common shares
Balance as of January 1,	$	2,766.7	$	2,766.9
Dividend paid in Common Stock		(308.1)		—
Used for corporate purposes		(0.3)		(0.2)
Balance as of September 30,		2,458.3		2,766.7
Parent Company (Grupo Mexico) common shares
Balance as of January 1,		382.3		340.7
Other activity, including dividend, interest and foreign currency translation effect		(9.6)		23.7
Balance as of September 30,		372.7		364.4
Treasury stock balance as of September 30,	$	2,831.0	$	3,131.1

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	(12,400)	(9,600)
Total shares granted at September 30,	(441,200)	(426,400)
Remaining shares reserved	158,800	173,600

Summary of non-controlling interest activity

The following table presents the non-controlling interest activity the nine-month period ended September 30, 2024 and 2023 (in millions):

	2024		2023
Balance as of January 1,	$	63.1	$	62.7
Net earnings		9.5		7.3
Dividend paid		(4.2)		(6.6)
Balance as of September 30,	$	68.4	$	63.4

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 nine-month period ended September 30, 2024 and 2023 and the unrecognized compensation expense under this plan were as follows (in millions):

	2024		2023
Stock based compensation expense	$	0.5	$	0.5
Unrecognized compensation expense	$	1.2	$	1.6

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	(49,470)	$	1.86
Forfeited	—		—
Outstanding shares at September 30, 2024	1,913,466	$	1.86
Outstanding shares at January 1, 2023	2,754,506	$	1.86
Granted	—		—
Exercised	(770,017)	$	1.86
Forfeited	—		—
Outstanding shares at September 30, 2023	1,984,489	$	1.86