Zeno is one of the largest independent public relations firms in the world, with annual revenues of about $20 million. The full-service agency specializes in consumer marketing, technology, healthcare and corporate affairs/crisis management. Zeno has offices in New York, Chicago, San Francisco, Washington, D.C., Seattle and London. Zeno’s clients include Pfizer, Schering, Sepracor, Oracle, TD Ameritrade, Kia Motors America and Rubbermaid.