A jury found Wednesday that entertainment giant Live Nation, which hosts tens of thousands of concerts a year, and its Ticketmaster subsidiary had a harmful monopoly over big venues.

The ruling, in a lawsuit brought by dozens of states, won’t immediately bring relief for concertgoers who have long complained about high ticket prices.

But it could cost Live Nation hundreds of millions of dollars and perhaps force the company to sell some of its concert venues when the judge hands out penalties later.