STOCKHOLDERS' EQUITY: (Tables)

3 Months Ended

Mar. 31, 2024

Share based Compensation Plan

Schedule of activity in treasury stock

Activity in treasury stock in the three-month period ended March 31, 2024 and 2023 is as follows (in millions):

	2024		2023
Southern Copper common shares
Balance as of January 1,	$	2,766.6	$	2,766.9
Used for corporate purposes		(*)		(0.1)
Balance as of March 31,		2,766.6		2,766.8
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		8.3		7.6
Balance as of March 31,		390.6		348.3
Treasury stock balance as of March 31,	$	3,157.2	$	3,115.1

(*) Less than $0.1 million.

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	(2,800)	(3,200)
Total shares granted at March 31,	(431,600)	(420,000)
Remaining shares reserved	168,400	180,000

Summary of non-controlling interest activity

The following table presents the non-controlling interest activity the three-month period ended March 31, 2024 and 2023 (in millions):

	2024		2023
Balance as of January 1,	$	63.1	$	62.7
Net earnings		2.8		2.7
Dividend paid		(1.7)		(1.8)
Balance as of March 31,	$	64.2	$	63.6

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, 2024 and 2023 and the unrecognized compensation expense under this plan were as follows (in millions):

	2024		2023
Stock based compensation expense	$	0.2	$	0.2
Unrecognized compensation expense	$	1.5	$	2.2

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	(22,216)		1.86
Forfeited			—
Outstanding shares at March 31, 2024	1,940,720	$	1.86
Outstanding shares at January 1, 2023	2,754,506	$	1.86
Granted	—		—
Exercised	(624,026)		—
Forfeited	—		—
Outstanding shares at March 31, 2023	2,130,480	$	1.86