The chief executive officer of Sonic Automotive Inc., one of the nation’s largest automotive retailers, sold $763,335 worth of company stock according to a filing released Thursday.

According to a Form 4 filed with the Securities and Exchange Commission, David B. Smith sold 10,946 shares at $45.074 on Tuesday and an additional 5,999 shares at $45.00 on Thursday.

Smith, who took over as CEO in September 2018, still owns 381,866 shares of stock, worth around $16.81 million based on Thursday’s closing share price.

Founded in 1997, Sonic Automotive operates franchised dealerships across 20 different new vehicle brands and EchoPark Automotive, its pre-owned car business.

Shares of Sonic Automotive were last trading down $1.01 at $43.01 on Friday.