STOCKHOLDERS' EQUITY: (Tables)

3 Months Ended

Mar. 31, 2014

Activity in treasury stock in the three-month period ended March 31, 2014 and 2013 is as follows (in millions):

	2014		2013
Southern Copper common shares
Balance as of January 1,	$	1,011.0	$	729.8
Purchase of shares	52.5		—
Stock dividend	—		—
Balance as of March 31,	1,063.5		729.8

Parent Company (Grupo Mexico) common shares
Balance as of January 1,	205.6		189.0
Other activity, including dividend, interest and currency translation effect	6.3		12.4
Balance as of March 31,	211.9		201.4

Treasury stock balance as of March 31,	$	1,275.4	$	931.2

Schedule of share repurchase program activity

					Total Number of	Maximum Number of
			Average		Shares Purchased as	Shares that May Yet
Period		Total Number of	Price Paid		Part of Publicly	Be Purchased Under	Total Cost
From	To	Shares Purchased	per Share		Announced Plan	*the Plan @ $29.11 ()**	($ in millions)
2008:		28,510,150	$	13.49	28,510,150		$	384.7
2009:		4,912,000	14.64		33,422,150		71.9
2010:		15,600	29.69		33,437,750		0.5
2011:		9,034,400	30.29		42,472,150		273.7
2012:		4,442,336	33.17		46,914,486		147.3
2013:		10,245,000	27.47		57,159,486		281.4
2014:
01/01/14	01/31/14	1,768,000	28.06		58,927,486		49.6
03/01/14	03/21/14	106,079	27.04		59,033,565		2.9
Total first quarter		1,874,079	28.00				52.5

Total purchased		59,033,565	$	20.53		27,070,666	$	1,212.0

(*) NYSE closing price of SCC common shares at March 31, 2014

Employee Stock Purchase Plan

STOCKHOLDERS' EQUITY

Schedule of stock based compensation expense and unrecognized compensation expense

The stock based compensation expense for the first quarter 2014 and 2013, under the Employee Stock Purchase Plan and the unrecognized compensation expense as of March 31, 2014 and 2013 under this plan were as follows (in millions):

	2014		2013
Stock based compensation expense	$	0.5	$	0.5
Unrecognized compensation expense	$	1.6	$	3.7

Schedule of stock award activity

	Shares		Unit Weighted Average Grant Date Fair Value
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

Outstanding shares at January 1, 2013	6,955,572		$	1.16
Granted	—		—
Exercised	(2,349,157	)	$	1.16
Forfeited	(29,639	)	$	1.16
Outstanding shares at March 31, 2013	4,576,776		$	1.16

New Employee Stock Purchase Plan

STOCKHOLDERS' EQUITY

Schedule of stock based compensation expense and unrecognized compensation expense

The stock based compensation expense for the first quarter 2014 and 2013, under the New Employee Stock Purchase Plan and the unrecognized compensation expense as of March 31, 2014 and 2013 under this plan were as follows (in millions):

	2014		2013
Stock based compensation expense	$	0.1	$	0.1
Unrecognized compensation expense	$	2.5	$	3.0

Schedule of stock award activity

	Shares		Unit Weighted Average Grant Date Fair Value

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

Outstanding shares at January 1, 2013	2,944,742		$	2.05
Granted	—		—
Exercised	—		—
Forfeited	(22,638	)	$	2.05
Outstanding shares at March 31, 2013	2,922,104		$	2.05