Woodward (formerly Woodward Governor) like to remain in control. The company manufactures and services a slew of energy control and optimization systems used in aircraft and vehicles, turbine and piston engines, and electrical power equipment. Woodward serves OEMs and prime contractors worldwide in commercial and military aerospace, power generation and distribution, and transportation. These include GE (15% of sales), Caterpillar, Nordex, and United Technologies. Woodward's products are primarily made in the US, where the company garners more than half of its sales.