Regal Entertainment Group provided this 2009 photo of founder Mike Campbell, who is stepping down as chief executive officer but remaining executive chairman of the company. Knoxville, Tenn. -based Regal is the largest movie theater company in the United States with 550 theaters in 39 states. AP Photo logo AP Photo 7 months ago

Regal Entertainment Group provided this 2009 photo of founder Mike Campbell, who is stepping down as chief executive officer but remaining executive chairman of the company. Knoxville, Tenn. -based Regal is the largest movie theater company in the United States with 550 theaters in 39 states.