on july 18 , 2013 , the board approved a new $ 10 billion share repurchase program to be completed at the latest by june 30 , 2018 . schlumberger had repurchased $ 8.6 billion of shares under this new share repurchase program as of december 31 , 2015 . the following table summarizes the activity under these share repurchase programs during 2015 , 2014 and 2013 : ( stated in thousands , except per share amounts ) total cost of shares purchased total number of shares purchased average price paid per .