Market share of the leading out-of-home advertising companies in the U.S. 2018
In 2018, Clear Channel Outdoor was estimated to hold a 17 percent of the out-of-home advertising market in the United States based on revenue. At that time Lamar Advertising was the leader of OOH advertising, its revenue accounting for 23 percent of totals, but Outfront Media followed closely behind with 21 percent of the market.