Ticketmaster, the largest U.S. ticketing company, merged with Live Nation, the biggest concert promoter, 14 years ago following a lengthy antitrust investigation. The Justice Department required the combined company to pledge that it wouldn't tie its services together or retaliate against venues that switched promoters or ticketing services. In 2019, the Justice Department alleged that the company had repeatedly violated that promise, and required it to enter a new settlement imposing an external monitor to ensure compliance and investigate any further disputes. The Wall Street Journal earlier reported on the potential timing of a Ticketmaster suit.