Castells & Asociados, formerly known as Ad Americas, is an independent, full-service Hispanic marketing and advertising agency, based in Los Angeles. Founded in 1998, the agency has more than $50 million in billings and is rated among the top firms in the United States. Its clients include McDonald's, Health Net, Mervyn's, Dole Packaged Foods Company, CSK Auto, Southern California Toyota Dealers, SBS Radio Network, and Time Warner Communications. The agency has also served the Nevada Power Company, California Speedway, Knott's Berry Farm, California Department of Agriculture, and the California Department of Commerce. Castells & Asociados has a marketing team of more than 40 bicultural, bilingual staffers who are trained in general market and Hispanic marketing.