William Carlton (defendant) owned a large taxicab business. Carlton was a controlling shareholder of 10 different corporations, each of which held title to two cabs and no other assets. Each cab carried $10,000 in car liability insurance, which was the minimum required by state law. John Walkovszky (plaintiff) alleged that he was struck and injured by a cab owned by Seon Cab Corporation (defendant), one of Carlton’s entities. Walkovszky sued Carlton, Seon Cab Corporation, and each of Carlton’s other cab corporations, arguing that they all functioned as a single enterprise and should be treated accordingly. Carlton moved to dismiss the complaint as to him personally for failure to state a cause of action. The trial court granted the motion. Walkovszky appealed, and the appellate court reversed, reinstating the complaint as to Carlton. Carlton appealed.