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STOCKHOLDERS' EQUITY: (Tables)

3 Months Ended

Mar. 31, 2015

STOCKHOLDERS' EQUITY

Schedule of activity in treasury stock

Activity in treasury stock in the three- month period ended March 31, 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		370.1			52.5
Balance as of March 31,		2,063.6			1,063.5
Parent Company (Grupo Mexico) common shares
Balance as of January 1,		207.2			205.6
Other activity, including dividend, interest and currency translation effect		(2.9		)	6.3
Balance as of March 31,		204.3			211.9
Treasury stock balance as of March 31,		$	2,267.9		$	1,275.4

Schedule of share repurchase program activity

									Total Number of		Maximum Number
						Average			Shares		of Shares that May
				Total Number		Price			Purchased as		Yet Be Purchased
Period				of Shares		Paid per			Part of Publicly		Under the Plan		Total Cost
From		To		Purchased		Share			Announced Plan		@ $29.18 (*)		($ 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
											26,992,079
Total purchased				92,951,793		$	23.80						$	2,212.4

(*) NYSE closing price of SCC common shares at March 31, 2015.

Employee Stock Purchase 2007 Plan

STOCKHOLDERS' EQUITY

Schedule of stock based compensation expense and unrecognized compensation expense

The stock based compensation expense for the first quarter 2015 and 2014 and the unrecognized compensation expense as of March 31, 2015 and 2014 under the Employee Stock Purchase Plan were as follows (in millions):

		2015			2014
Stock based compensation expense		$	—		$	0.5
Unrecognized compensation expense		$	—		$	1.6

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		—		—
Forfeited		(3,660,945	)	$	1.16
Outstanding shares at March 31, 2015		637,667		$	1.16
Outstanding shares at January 1, 2014		4,449,599		$	1.16
Granted		—		—
Exercised		(40,632	)	$	1.16
Forfeited		—		—
Outstanding shares at March 31, 2014		4,408,967		$	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 first quarter 2015 and 2014 and the unrecognized compensation expense under this plan were as follows (in millions):

		2015			2014
Stock based compensation expense		$	0.1		$	0.1
Unrecognized compensation expense		$	2.0		$	2.5

Schedule of stock award activity

The following table presents the stock award activity of this plan for the three months ended March 31, 2015 and 2014:

		Shares		Unit Weighted Average Grant Date Fair Value
Outstanding shares at January 1, 2015		2,287,891		$	2.05
Granted		—		—
Exercised		—		—
Forfeited		—		—
Outstanding shares at March 31, 2015		2,287,891		$	2.05
Outstanding shares at January 1, 2014		3,012,464		$	2.05
Granted		—		—
Exercised		(249,446	)	$	2.05
Forfeited		—		—
Outstanding shares at March 31, 2014		2,763,018		$	2.05

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

		% Deducted
If the resignation occurs during:
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

		% Deducted
If the termination occurs during:
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	%

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