High Quality Content by WIKIPEDIA articles! The Greenbrier Companies (NYSE: GBX) is a publicly traded transportation manufacturing corporation based in Lake Oswego, Oregon, United States. Predominantly an American company, Greenbrier specializes in transportation services, notably barge and railroad car manufacturing, railroad car refurbishment, and railroad car leasing/management services. As of 2006, Greenbrier employs in excess of 3,500 people combined at its operations in Europe, Mexico, Canada, and the United States. Formed in 1981 and went public in 1994, the company generates revenues of USD $953 million.