Generals Motors Co., often referred to as simply GM, is an American automobile producer and seller. The corporation employs approximately 215,000 people and operates across six continents. Their portfolio of brands includes Buick, Cadillac, Chevrolet, Opel (Vauxhall), Baojun and others. In 2015 GM sold around 10 million cars. The company boasts more than 2016 car models that have been rated with an overall 5-star vehicle score. Headquartered in Detroit, USA, GM has many joint-ventures, based in China, Russia, India, South Africa and so on. General Motors Co. is listed on the New York Stock Exchange. The company is the S&P 100 Index component.