High Quality Content by WIKIPEDIA articles! Caterpillar Inc. (NYSE: CAT), also known as "CAT", designs, manufactures, markets and sells machinery and engines and sells financial products and insurance to customers via a worldwide dealer network. Caterpillar is the world`s largest manufacturer of construction and mining equipment, diesel and natural gas engines and industrial gas turbines. With more than US$70 billion in assets, Caterpillar was ranked number one in its industry and number 44 overall in the 2009 Fortune 500. Caterpillar stock is a component of the Dow Jones Industrial Average.