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STOCKHOLDERS' EQUITY: (Tables) | 9 Months Ended
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Sep. 30, 2016
STOCKHOLDERS' EQUITY: |
Schedule of activity in treasury stock | Activity in treasury stock in the nine-month period ended September 30, 2016 and 2015 is as follows (in millions):
|  | 2016 |  | 2015 |
Southern Copper common shares |  |  |  |  |
Balance as of January 1, |  | $ | 2,697.6 |  | $ | 1,693.5 |
Purchase of shares |  | 71.7 |  | 724.4 |
Used for corporate purposes |  | (0.3 | ) | (0.4 | )
Balance as of September 30, |  | 2,769.0 |  | 2,417.5 |
Parent Company (Grupo Mexico) common shares |  |  |  |  |
Balance as of January 1, |  | 211.3 |  | 207.2 |
Other activity, including dividend, interest and currency transaction effect |  | 6.7 |  | (6.9 | )
Balance as of September 30, |  | 218.0 |  | 200.3 |
Treasury stock balance as of September 30, |  | $ | 2,987.0 |  | $ | 2,617.8 |
Schedule of share distributions | The following table summarizes share distributions in the nine months of 2016 and 2015:
|  | 2016 |  | 2015 |
Southern Copper common shares |  |  |  |  |
Directors’ Stock Award Plan |  | 12,000 |  | 13,200 |
Parent Company (Grupo Mexico) common shares |  |  |  |  |
Employee stock purchase plan (shares in millions) |  | 0.9 |  | 4.3 |
Schedule of share repurchase program activity |
Period |  | Total Number of Shares |  | Average Price Paid per |  | 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 |  | Share |  | Announced Plan |  | @ $26.30 (*) |  | ($ 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 |  |  |  | 36,689,052 |  | 27.38 |  | 116,559,966 |  |  |  | 1,004.4 |
2016 |  |  |  |  |  |  |  |  |  |  |  |  |
01/01/16 |  | 01/31/16 |  | 2,235,200 |  | 24.05 |  | 118,795,166 |  |  |  | 53.7 |
Total first quarter |  |  |  | 2,235,200 |  | 24.05 |  |  |  |  |  | 53.7 |
08/01/16 |  | 08/31/16 |  | 115,000 |  | 25.88 |  | 118,910,166 |  |  |  | 3.0 |
09/01/16 |  | 09/30/16 |  | 587,601 |  | 25.55 |  | 119,497,767 |  |  |  | 15.0 |
Total third quarter |  |  |  | 702,601 |  | 25.61 |  |  |  |  |  | 18.0 |
Total purchased |  |  |  | 119,497,767 |  | $ | 24.42 |  |  |  | 3,103,930 |  | $ | 2,918.4 |
(*) NYSE closing price of SCC common shares at September 30, 2016.
Schedule of activity in Directors' Stock Award Plan |
|  | 2016 |  | 2015 |
Total SCC shares reserved for the plan |  | 600,000 |  | 600,000 |
Total shares granted at January 1, |  | (322,800 | ) | (309,600 | )
Granted in the period |  | (12,000 | ) | (13,200 | )
Total shares granted at September 30, |  | (334,800 | ) | (322,800 | )
Remaining shares reserved |  | 265,200 |  | 277,200 |
Summary of non-controlling interest activity | The following table presents the non-controlling interest activity for the nine months ended September 30, 2016 and 2015 ($ in millions):
|  | 2016 |  | 2015 |
Balance as of January 1, |  | $ | 36.3 |  | $ | 32.1 |
Net earnings |  | 1.9 |  | 3.5 |
Dividend paid |  | — |  | (0.5 | )
Other |  | — |  | — |
Balance as of September 30, |  | $ | 38.2 |  | $ | 35.1 |
Employee Stock Purchase 2007 Plan |
STOCKHOLDERS' EQUITY: |
Schedule of stock award activity | The following table presents the stock award activity of the Employee Stock Purchase Plan at the close of the plan and for the nine months ended September 30, 2016:
|  | Shares |  | Unit Weighted Average Grant Date Fair Value |
Outstanding shares at January 1, 2016 |  | 109,241 |  | $ | 1.16 |
Granted |  | — |  | — |
Exercised |  | (64,380 | ) | 1.16 |
Forfeited |  | — |  | — |
Outstanding shares at September 30, 2016 |  | 44,861 |  | $ | 1.16 |
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 |
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, 2016 and 2015 and the unrecognized compensation expense under this plan were as follows (in millions):
|  | 2016 |  | 2015 |
Stock based compensation expense |  | $ | 0.4 |  | $ | 0.4 |
Unrecognized compensation expense |  | $ | 1.2 |  | $ | 1.7 |
Schedule of stock award activity | The following table presents the stock award activity of the New Employee Stock Purchase Plan for the nine months ended September 30, 2016 and 2015:
|  | Shares |  | Unit Weighted Average Grant Date Fair Value |
Outstanding shares at January 1, 2016 |  | 2,227,582 |  | $ | 2.05 |
Granted |  | — |  | — |
Exercised |  | (740,601 | ) | 2.05 |
Forfeited |  | — |  | — |
Outstanding shares at September 30, 2016 |  | 1,486,981 |  | $ | 2.05 |
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 |
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 2016 and 2015 and the unrecognized compensation expense under this plan were as follows ($ in millions):
|  | 2016 |  | 2015 |
Stock based compensation expense |  | $ | 0.4 |  | $ | 0.2 |
Unrecognized compensation expense |  | $ | 4.0 |  | $ | 4.6 |
Schedule of stock award activity | The following table presents the stock award activity of this plan for the nine months ended September 30, 2016 and 2015:
|  | Shares |  | Unit Weighted Average Grant Date Fair Value |
Outstanding shares at January 1, 2016 |  | 2,656,386 |  | $ | 2.63 |
Granted |  | — |  | — |
Exercised |  | (103,852 | ) | 2.63 |
Forfeited |  | — |  | — |
Outstanding shares at September 30, 2016 |  | 2,552,534 |  | $ | 2.63 |
Outstanding shares at January 1, 2015 |  | — |  | — |
Granted |  | 2,656,386 |  | $ | 2.63 |
Exercised |  | — |  | — |
Forfeited |  | — |  | — |
Outstanding shares at September 30, 2015 |  | 2,656,386 |  | $ | 2.63 |

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