( 1 ) represents warrants sold in connection with the offering of the company 2019s convertible senior notes ( see note 8 ) . treasury stock in connection with its issuance of $ 400.0 million principal amount of 0.625% ( 0.625 % ) convertible senior notes due 2014 on february 16 , 2007 , the company repurchased 11.6 million shares of its outstanding common stock for $ 201.6 million in privately negotiated transactions concurrently with the offering