PETCO Animal Supplies is a holding company for PETCO Animal Supplies Stores, the second-largest US retailer of specialty pet supplies (behind PetSmart). The company boasts more than 1,300 stores in the all 50 US states, as well as Puerto Rico, and Mexico, making it the only pet store to cover the entire US market. The chain sells more than 10,000 pet-related products for dogs, cats, fish, reptiles, birds, and other small animals. PETCO Animal Supplies holding company was formed to create a foundation for the operating firm's growth strategies. The company is owned by TPG Capital and Leonard Green & Partners, which is selling it.