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## Unregistered Sales of Equity Securities and Use of Proceeds 

The following table summarizes the surrenders of our equity securities during the three months ended December 31, 2018: 

<img src='content_image/1034063.jpg'>

connection with the vesting of awards under our long-term incentive program. (b) In May 2010, the Board of Directors authorized the repurchase of up to $3.0 billion of common stock and in June 2012 increased its authorization for the repurchase of 

common stock by an additional $3.0 billion. In October 2016, the Board of Directors approved a new share repurchase program authorizing the repurchase of an additional $3.0 billion of common stock. The stock repurchase program does not have an expiration date. 

