 It is the second-largest independent advertising agency in the United States according to "Advertising Age" in terms of revenue and is probably best known for its ads for Corona Beer, Porsche, Panera Bread and Careerbuilder.com.The agency was founded in 1898 in Milwaukee by Fred "Cody" Cramer and William Krasselt.They relocated their headquarters to Chicago in the mid-1980s, where it remains as of 2018.