Adam Opel AG (Opel) is a German automobile company founded by Adam Opel in 1862. Opel has been building automobiles since 1899, and became an Aktiengesellschaft in 1929. The company is headquartered in Rüsselsheim, Hesse, Germany. It became a majority-stake subsidiary of the General Motors Corporation in 1929 and has been a wholly owned subsidiary since 1931.
In 2010, Opel announced that it will invest around €11 billion in the next five years. One billion of that is designated solely for the development of innovative and fuel-saving engines and transmissions.