Headquartered in Los Angeles and San Francisco, Munger Tolles & Olson is highly regarded in what competitors consider elite copyright litigation. "When we look at the top tier, we think about the firms that we know the top clients go to for some of their most important cases, not just who's got a steady flow of more commodity work. Munger certainly gets some of those top cases," said one lawyer. The firm's recent clients include Universal Music Group, Warner Music Group, and the Motion Picture Association of America. Competitors praised the firm using superlatives such as "highly respected", "outstanding" and "excellent", while Glenn Pomerantz was singled out for his successes in entertainment media.