International Speedway Corporation (ISC) was a corporation whose primary business is the ownership and management of motorsports race tracks. ISC was founded by NASCAR founder Bill France Sr. in 1953 for the construction of Daytona International Speedway and in 1999 they merged with Penske Motorsports to become one of the largest motorsports companies in North America. The company has played an important, though controversial, role in the modernization of the sport. It has worked with NASCAR to create new tracks and update older ones in an effort to improve the racing and the experience for spectators (though because both companies have several members of the France family in top positions, ISC's competitors have filed multiple lawsuits on antitrust grounds) and has constructed popular new tracks in regions previously thought uninterested in NASCAR. On May 20, 2019, NASCAR agreed to purchase ISC for approximately $2 billion US, with it going private October 18, 2019. History Bill France Racing International Speedway Corporation (ISC) was founded as Bill France Racing, Inc. (later Daytona International Speedway Corporation) in 1953 and in 1957 the company signed a contract for the use of land on which to build Daytona International Speedway, one of the world's first superspeedways. A decade later, France decided to build another superspeedway, this time on a 2,000-acre (8 km²) site near Talladega, Alabama and after its completion Talladega Superspeedway became NASCAR's fastest track. These two tracks were the fastest on the series schedule until the advent of restrictor plates in 1988. In 1968, the company assumed its current name to reflect its more ambitious scope. Two years later, ISC created the Motor Racing Network, a play-by-play radio network for NASCAR races, with MRN's first race coverage coming at the 1970 Daytona 500. Transition The early 1980s saw NASCAR's popularity increase, not only among fans, but also with sponsors. Companies like Ford, General Motors, Winston and Gatorade were willing to put up advertising dollars and holding auto races became a much more profitable venture. To capitalize on this, the company began pursuing expansion through the purchase of existing tracks. In 1982, the company bought one of the series' most popular and traditional ones, Darlington Raceway which has been in operation since 1950, as well as Tucson Raceway Park, a dirt oval (since paved) in Arizona. The following year they partnered with Corning Glass Works to purchase the Watkins Glen International road course in