Sonic began in 1953 when Troy N. Smith Sr. purchased a small root beer stand called Top Hat.
In 1959, the company changed its name to Sonic.
In the 60s the company formed Sonic Supply. In 1973, Sonic Supply was restructured as a franchise company that provided equipment and other supplies to franchisees.
In 1977, the Sonic School for manager training was formed.
In 1991, the company went public. The company began to open 100+ new locations per year.
In mid-2018, Sonic launched a mobile app that allows customers to order ahead and pick up their order via the drive-through, at the counter, or at any loc with car service.
Today, the chain operates over 3500 locations in 43 states. The Sonic corporate office is located in Oklahoma City, Oklahoma.