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STOCKHOLDERS' EQUITY: (Tables)

6 Months Ended

Jun. 30, 2023

Share based Compensation Plan

Schedule of activity in treasury stock

​

Activity in treasury stock in the six-month period ended June 30, 2023 and 2022 is as follows (in millions):

​

​	​	​	​	​	​	​
​		2023			2022
Southern Copper common shares	​	​	​	​	​	​
Balance as of January 1,	​	$	2,766.9	​	$	2,767.2
Used for corporate purposes	​		(0.1)	​		(0.1)
Balance as of June 30,	​		2,766.8	​		2,767.1
​	​	​	​	​	​	​
Parent Company (Grupo Mexico) common shares	​	​	​	​	​	​
Balance as of January 1,	​	​	340.7	​		306.8
Other activity, including dividend, interest and foreign currency transaction effect	​	​	24.3	​		17.6
Balance as of June 30,	​		365.0	​		324.4
Treasury stock balance as of June 30,	​	$	3,131.8	​	$	3,091.5

Schedule of activity in Directors' Stock Award Plan

​

​	​	​	​	​
​		2023		2022
Total SCC shares reserved for the plan		600,000		600,000
Total shares granted at January 1,		(416,800)		(405,200)
Granted in the period		(6,400)		(5,600)
Total shares granted at June 30,		(423,200)		(410,800)
Remaining shares reserved		176,800		189,200

Summary of non-controlling interest activity

The following table presents the non-controlling interest activity for the first six months of 2023 and 2022 (in millions):

​	​	​	​	​	​	​
​		2023			2022
Balance as of January 1,		$	62.7		$	58.6
Net earnings	​		4.9	​		5.0
Dividend paid	​		(4.6)	​		(3.8)
Balance as of June 30,		$	63.0		$	59.8

Employee Stock Purchase 2015 Plan

Share based Compensation Plan

Schedule of stock based compensation expense and unrecognized compensation expense

​

​	​	​	​	​	​	​
​		2023			2022
Stock based compensation expense	​	$	—	​	$	0.3
Unrecognized compensation expense	​	$	—	​	$	0.5

Schedule of stock award activity

​

​	​	​	​	​	​
​		​		Unit Weighted Average
​	​	Shares	​	Grant Date Fair Value
Outstanding shares at January 1, 2023		845,895	​	$	2.63
Granted		—	​		—
Exercised		(757,164)	​	$	2.63
Forfeited		​	​		—
Outstanding shares at June 30, 2023		88,731	​	$	2.63
Outstanding shares at January 1, 2022		867,234	​	$	2.63
Granted		—	​		—
Exercised		(16,394)	​	$	2.63
Forfeited		—	​		—
Outstanding shares at June 30, 2022		850,840	​	$	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 six months ended June 30, 2023 and 2022 and the unrecognized compensation expense under this plan were as follows (in millions):

​	​	​	​	​	​	​
​		2023		​	2022
Stock based compensation expense	​	$	0.3		$	0.3
Unrecognized compensation expense	​	$	1.8		$	3.0

Schedule of stock award activity

​

​	​	​	​	​
​	​	​	​	Unit Weighted Average
​		Shares		Grant Date Fair Value
Outstanding shares at January 1, 2023		2,754,506	$	1.86
Granted		—	​	—
Exercised		(694,565)	$	1.86
Forfeited		—	​	—
Outstanding shares at June 30, 2023		2,059,941	$	1.86
Outstanding shares at January 1, 2022	​	3,173,924	$	1.86
Granted	​	—	​	—
Exercised	​	(160,236)	​	1.86
Forfeited	​	—	​	—
Outstanding shares at June 30, 2022		3,013,688	$	1.86

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