STOCKHOLDERS' EQUITY: (Tables)

9 Months Ended

Sep. 30, 2015

STOCKHOLDERS' EQUITY

Schedule of activity in treasury stock

Activity in treasury stock in the nine-month period ended September 30, 2015 and 2014 is as follows (in millions):

	2015			2014
Southern Copper common shares
Balance as of January 1,	$	1,693.5		$	1,011.0
Purchase of shares	724.4			388.9
Used for corporate purposes	(0.4		)	(0.2		)
Balance as of September 30,	2,417.5			1,399.7
Parent Company (Grupo Mexico) common shares
Balance as of January 1,	207.2			205.6
Other activity, including dividend, interest and currency translation effect	(6.9		)	6.2
Balance as of September 30,	200.3			211.8
Treasury stock balance as of September 30,	$	2,617.8		$	1,611.5

Schedule of share distributions

The following table summarizes share distributions in the nine months of 2015 and 2014:

	2015	2014
Southern Copper common shares
Directors’ Stock Award Plan	13,200	12,000
Parent Company (Grupo Mexico) common shares
Employee stock purchase plan (shares in millions)	4.3	0.9

Schedule of share repurchase program activity

Period		Total Number of Shares	Average Price Paid		Total Number of Shares Purchased as Part of Publicly	Maximum Number of Shares that May Yet Be Purchased Under the Plan	Total Cost
From	To	Purchased	per Share		Announced Plan	@ $26.72 (*)	($ in millions)
2008	2012	46,914,486	$	18.72	46,914,486		$	878.1
2013		10,245,000	27.47		57,159,486		281.4
2014		22,711,428	30.06		79,870,914		682.8
2015
01/01/15	01/31/15	5,927,154	27.12		85,798,068		160.7
02/01/15	02/28/15	2,590,076	29.45		88,388,144		76.3
03/01/15	03/31/15	4,563,649	29.16		92,951,793		133.1
Total first quarter		13,080,879	29.29				370.1
04/01/15	04/30/15	1,511,200	29.42		94,462,993		44.5
Total second quarter		1,511,200	29.42				44.5
07/01/15	07/31/15	1,603,800	27.84		96,066,793		44.6
08/01/15	08/31/15	6,160,000	26.90		102,226,793		165.7
09/01/15	09/30/15	3,724,273	26.69		105,951,066		99.4
Total third quarter		11,488,073	26.97				309.7
						16,219,324
Total purchased		105,951,066	$	24.22			$	2,566.6

(*) NYSE closing price of SCC common shares at September 30, 2015.

Schedule of activity in Directors' Stock Award Plan

	2015		2014
Total SCC shares reserved for the plan	600,000		600,000
Total shares granted at January 1,	(309,600	)	(297,600	)
Granted in the period	(13,200	)	(12,000	)
Total shares granted at September 30,	(322,800	)	(309,600	)
Remaining shares reserved	277,200		290,400

Employee Stock Purchase 2007 Plan

STOCKHOLDERS' EQUITY

Schedule of stock award activity

	Shares		Unit Weighted Average Grant Date Fair Value
Outstanding shares at January 1, 2015	4,298,612		$	1.16
Granted	—		—
Exercised	(4,189,371	)	1.16
Forfeited	—		—
Outstanding shares at September 30, 2015	109,241		$	1.16
Outstanding shares at January 1, 2014	4,449,599		$	1.16
Granted	—		—
Exercised	(140,545	)	1.16
Forfeited	—		—
Outstanding shares at September 30, 2014	4,309,054		$	1.16

Employee Stock Purchase 2010 Plan

STOCKHOLDERS' EQUITY

Schedule of stock based compensation expense and unrecognized compensation expense

The stock based compensation expense for the nine months ended September 30, 2015 and 2014 and the unrecognized compensation expense under this plan were as follows (in millions):

	2015		2014
Stock based compensation expense	$	0.4	$	0.4
Unrecognized compensation expense	$	1.7	$	2.2

Schedule of stock award activity

	Shares		Unit Weighted Average Grant Date Fair Value
Outstanding shares at January 1, 2015	2,287,891		$	2.05
Granted	—		—
Exercised	(60,309	)	2.05
Forfeited	—		—
Outstanding shares at September 30, 2015	2,227,582		$	2.05
Outstanding shares at January 1, 2014	3,012,464		$	2.05
Granted	—		—
Exercised	(724,573	)	2.05
Forfeited	—		—
Outstanding shares at September 30, 2014	2,287,891		$	2.05

Employee Stock Purchase 2015 Plan

STOCKHOLDERS' EQUITY

Schedule of stock based compensation expense and unrecognized compensation expense

The stock based compensation expense for the nine months of 2015 and the unrecognized compensation expense under this plan were as follows (in millions):

	2015
Stock based compensation expense	$	0.2
Unrecognized compensation expense	$	4.6

Schedule of stock award activity

	Shares	Unit Weighted Average Grant Date Fair Value
Outstanding shares at January 1, 2015	—	—
Granted	2,652,886	$	2.63
Exercised	—	—
Forfeited	—	—
Outstanding shares at September 30, 2015	2,652,886	$	2.63

Employee Stock Purchase 2015 Plan | Voluntary Resignation

STOCKHOLDERS' EQUITY

Schedule of percentage deduction from the amount to be paid to the employee on termination of service

If the resignation occurs during:	% Deducted
1st year after the grant date	90%
2nd year after the grant date	80%
3rd year after the grant date	70%
4th year after the grant date	60%
5th year after the grant date	50%
6th year after the grant date	40%
7th year after the grant date	20%

Employee Stock Purchase 2015 Plan | Involuntary Termination

STOCKHOLDERS' EQUITY

Schedule of percentage deduction from the amount to be paid to the employee on termination of service

If the termination occurs during:	% Deducted
1st year after the grant date	100%
2nd year after the grant date	95%
3rd year after the grant date	90%
4th year after the grant date	80%
5th year after the grant date	70%
6th year after the grant date	60%
7th year after the grant date	50%