Caterpillar designs, manufactures, markets and sells heavy equipment and engines and sells financial and insurance products to customers through a network of agents around the world. Caterpillar is the world's largest maker of construction and mining equipment, diesel and natural gas engines, and industrial gas turbines with assets of more than US $ 70 billion. Caterpillar was ranked No. 1 in its industry and 44 in total for 2009 as Fortune 500. A component of the Dow Jones Industrial Average. The company dates back to 1925. In 1986, the company reorganized itself under its current name Caterpillar. The company is headquartered in Vibeoria, Illinois, United States.