It shouldn't be a surprise that Uno Restaurant Holdings thinks its pizza is numero uno. The company operates and franchises about 160 Uno Chicago Grill restaurants in about 25 states and a handful of other countries. Known for its deep-dish, Chicago-style pizza, the casual dining chain also serves pasta, salads, seafood, steaks, burgers, and sandwiches. In addition to its flagship chain, the company has a fast casual concept called Uno Due Go as well as quick service Uno Express locations located in airports, sports arenas, and malls. Through subsidiary Uno Foods, it sells branded food products to airlines, hotels, supermarkets, and theaters. Uno Restaurant Holdings filed for bankruptcy in 2010.