The Nexstar Media Group is a publicly traded American telecommunications company headquartered in Irving, Texas. The company is the second-largest television station owner in the United States (after Sinclair Broadcast Group), owning 171 television stations across the U.S., most of whom are affiliates with the four "major" U.S. television networks located in small to medium-sized markets. It also operates all of the stations owned by an affiliated company, Mission Broadcasting, under local marketing agreements.