CANTON, Mass., Aug. 9, 2012 /PRNewswire/ -- Dunkin' Brands Group, Inc. (Nasdaq: DNKN) (the "Company"), the parent company of Dunkin' Donuts (DD) and Baskin-Robbins (BR), today announced that certain of its stockholders (the "Selling Stockholders") intend to offer for sale in an underwritten secondary offering approximately 21 million shares of its common stock pursuant to the Company's shelf registration statement filed with the Securities and Exchange Commission. ...