Beef and ice cream is an unbeatable combination for this restaurant company. Formerly The Steak n Shake Company, Biglari Holdings is a multi-concept dining operator with two chains operating under the names Steak n Shake and WesterN SizzliN. Its flagship concept encompasses more than 590 company-owned and franchised family dining spots in more than 25 states, mostly in the Midwest and Southeast. The diners, open 24-hours a day, are popular for their Steakburger sandwiches and milkshakes, as well as breakfast items and other dishes. About 420 of the units are company-owned, while the rest are franchised. WesterN SizzliN, meanwhile, oversees 90 franchised steak buffet restaurants in about 15 states.