Dairy Queen (DQ) is a chain of soft serve ice cream and fast-food restaurants owned by International Dairy Queen, Inc., a subsidiary of Berkshire Hathaway. The company was founded in 1940, and it is one of the oldest chains in the quick-service restaurant industry. Dairy Queen is known for its soft serve ice cream, Blizzard treats, sundaes, and DQ cakes. The menu also includes burgers, chicken sandwiches, hot dogs, and other fast-food items. Dairy Queen operates in more than 25 countries and has over 6,400 locations worldwide, with majority of the stores being operated as franchises.