Oracle built its fortune on database software and has spent decades expanding into the full enterprise stack. The company sells applications for finance, HR and supply chains, and its Oracle Cloud Infrastructure competes for large AI and database workloads against bigger cloud rivals. Long-term licenses and support contracts from a vast installed base fund the transition to cloud subscriptions. Founded in 1977, Oracle is also known for bold acquisitions, folding companies like PeopleSoft, Sun Microsystems and Cerner into its portfolio.