GM CEO Mary Barra sells 40% of her GM stock

According to a regulatory filing with the U.S. Securities and Exchange Commission (SEC), General Motors CEO Mary Barra sold 370,000 shares at the end of August, cashing in approximately $21.67 million, accounting for 40% of her stake in the company.

SEC filings show that GM insiders have made 10 open-market stock sales in the past six months. Such insider selling, often seen as a sign of a lack of confidence in a company's future performance, has drawn investor attention.