payable semi-annually in arrears , beginning on February 1 , 2009. of 41.2414 shares of common stock per $ 1,000 principal amount of the notes. concurrently with the offering in privately negotiated transactions. dilution to RadioShack 's common stock upon any conversion of the notes. the net economic effect of increasing the conversion price of the notes. upon conversion of the additional notes. institutional buyers in reliance on Rule 144A under the Securities Act. on Form 10-K and quarterly report on Form 10-Q .