Oracle Corporation, the world's largest enterprise software company, specializes in developing and marketing enterprise software products — particularly database management systems. Through organic growth and through a number of high-profile acquisitions (PeopleSoft, Siebel, Agile, Hyperion, Demantra, Retek and others) Oracle enlarged its share of the software market. By 2007 Oracle ranked third on the list of largest software companies in the world, after Microsoft and IBM. Oracle subsequently surpassed IBM after its acquisition of Hyperion and of BEA.

The corporation has arguably become best-known due to association with its flagship Oracle database. Oracle also develops, manufactures, markets, distributes, and services database and middleware software as well as applications software designed to help customers manage business data, support business operations, and facilitate collaboration and application development and grow their business operations.

CEO and founder of Oracle Corporation, Larry Ellison, has served as Oracle's CEO throughout the company's history. Ellison also served as the Chairman of the Board until his replacement by Jeffrey O. Henley in 2004. Ellison still retains his role as CEO.