pursuant to the terms of certain share-based compensation plans , employees may remit shares to the firm or the firm may cancel rsus or stock options to satisfy minimum statutory employee tax withholding requirements and the exercise price of stock options . under these plans , during 2017 , 2016 and 2015 , 12165 shares , 49374 shares and 35217 shares were remitted with a total value of $ 3 million , $ 7 million and $ 6 million , and the firm cancelled 8.1 million , 6.1 million and 5