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STOCKHOLDERS' EQUITY: (Tables) | 12 Months Ended
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Dec. 31, 2014
Share based compensation plan |
Schedule of activity in treasury stock | Activity in treasury stock in the years 2014 and 2013 was as follows (in millions):
|  | 2014 |  | 2013 |
Southern Copper common shares |  |  |  |  |
Balance as of January 1, |  | $ | 1,011.0 |  | $ | 729.8 |
Purchase of shares |  | 682.8 |  | 281.4 |
Used for corporate purposes |  | (0.3 | ) | (0.2 | )
Balance as of December 31, |  | 1,693.5 |  | 1,011.0 |
Parent Company (Grupo Mexico) common shares |  |  |  |  |
Balance as of January 1, |  | 205.6 |  | 189.0 |
Other activity, including dividend, interest and currency translation effect |  | 1.6 |  | 16.6 |
Balance as of December 31, |  | 207.2 |  | 205.6 |
Treasury stock balance as of December 31, |  | $ | 1,900.7 |  | $ | 1,216.6 |
Schedule of share repurchase program activity |
|  |  |  |  |  |  |  |  |  | Maximum Number |  |  |
|  |  |  |  |  |  |  | Total Number of |  | of Shares that May |  |  |
|  |  |  | Total Number of |  | Average Price |  | Shares Purchased as |  | Yet Be Purchased |  | Total Cost |
Period |  | Shares |  | Paid per |  | Part of Publicly |  | Under the Plan |  | ($ in |
From |  | To |  | Purchased |  | Share |  | Announced Plan |  | @ $28.20 (1) |  | millions) |
2008 |  | 2011 |  | 42,472,150 |  | $ | 17.20 |  | 42,472,150 |  |  |  | $ | 730.8 |
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 |
06/01/14 |  | 06/30/14 |  | 450,532 |  | 28.92 |  | 59,484,097 |  |  |  | 13.0 |
Total second quarter |  |  |  | 450,532 |  | 28.92 |  |  |  |  |  | 13.0 |
07/01/14 |  | 07/31/14 |  | 724,516 |  | 33.04 |  | 60,208,613 |  |  |  | 23.9 |
08/01/14 |  | 08/31/14 |  | 4,926,534 |  | 32.09 |  | 65,135,147 |  |  |  | 158.1 |
09/01/14 |  | 09/30/14 |  | 4,498,263 |  | 31.44 |  | 69,633,410 |  |  |  | 141.4 |
Total third quarter |  |  |  | 10,149,313 |  | 31.87 |  |  |  |  |  | 323.4 |
10/01/14 |  | 10/31/14 |  | 5,821,213 |  | 28.86 |  | 75,454,623 |  |  |  | 168.0 |
11/01/14 |  | 11/30/14 |  | 1,286,767 |  | 29.50 |  | 76,741,390 |  |  |  | 38.0 |
12/01/14 |  | 12/31/14 |  | 3,129,524 |  | 28.08 |  | 79,870,914 |  |  |  | 87.9 |
Total fourth quarter |  |  |  | 10,237,504 |  | 28.70 |  |  |  |  |  | 293.9 |
Total purchased |  |  |  | 79,870,914 |  | $ | 23.07 |  |  |  | 5,593,347 | (2) | $ | 1,842.3 |
(1) NYSE closing price of SCC common shares at December 31, 2014. (2) Maximum number of shares will increase by approximately 35.5 million shares, with the Board authorized increase of $1 billion approved on January 29, 2015.
Schedule of activity in Directors' Stock Award Plan |
|  | 2014 |  | 2013 |
Total SCC shares reserved for the plan |  | 600,000 |  | 600,000 |
Total shares granted at January 1, |  | (297,600 | ) | (285,600 | )
Granted in the period |  | (12,000 | ) | (12,000 | )
Total shares granted at December 31, |  | (309,600 | ) | (297,600 | )
Remaining shares reserved |  | 290,400 |  | 302,400 |
Employee Stock Purchase Plan |
Share based compensation plan |
Schedule of stock based compensation expense and unrecognized compensation expense |
|  | 2014 |  | 2013 |  | 2012 |
Stock based compensation expense |  | $ | 2.1 |  | $ | 2.1 |  | $ | 2.1 |
Unrecognized compensation expense |  | — |  | $ | 2.1 |  | $ | 4.2 |
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 |  | (150,987 | ) | 1.16 |
Forfeited |  | — |  | 1.16 |
Outstanding shares at December 31, 2014 |  | 4,298,612 |  | 1.16 |
Outstanding shares at January 1, 2013 |  | 6,955,572 |  | $ | 1.16 |
Granted |  | — |  | — |
Exercised |  | (2,474,814 | ) | 1.16 |
Forfeited |  | (31,159 | ) | 1.16 |
Outstanding shares at December 31, 2013 |  | 4,449,599 |  | 1.16 |
New Employee Stock Purchase Plan |
Share based compensation plan |
Schedule of stock based compensation expense and unrecognized compensation expense |
|  | 2014 |  | 2013 |  | 2012 |
Stock based compensation expense |  | $ | 0.6 |  | $ | 0.6 |  | $ | 0.6 |
Unrecognized compensation expense |  | $ | 2.0 |  | $ | 2.6 |  | $ | 3.2 |
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 |  | (724,573 | ) | 2.05 |
Forfeited |  | — |  | — |
Outstanding shares at December 31, 2014 |  | 2,287,891 |  | 2.05 |
Outstanding shares at January 1, 2013 |  | 2,944,742 |  | $ | 2.05 |
Granted |  | 226,613 |  | 2.05 |
Exercised |  | (38,098 | ) | 2.05 |
Forfeited |  | (120,793 | ) | 2.05 |
Outstanding shares at December 31, 2013 |  | 3,012,464 |  | 2.05 |

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