Larry Ellison

Larry Ellison built Oracle into the dominant force in enterprise database software and one of the most profitable technology companies in history. His relational database management system became the backbone of the global economy — processing bank transactions, airline reservations, government records, and corporate data for Fortune 500 companies worldwide. When Ellison started Oracle, relational databases were a theoretical concept in a research paper. He turned them into a multi-billion-dollar industry.

Ellison's competitive intensity is legendary. He pursued IBM, Microsoft, SAP, and every other enterprise software company with a combination of aggressive pricing, acquisitions, and product development that earned him a reputation as the most ruthless competitor in Silicon Valley. Oracle's acquisition strategy — buying PeopleSoft, Siebel, BEA Systems, Sun Microsystems, and dozens of others — was a masterclass in industry consolidation that generated enormous returns for shareholders.

His transition of Oracle to cloud computing in the 2010s and 2020s was initially dismissed by critics who said Oracle was too late. But Ellison's focus on cloud infrastructure, particularly for enterprise workloads and AI training, has proven prescient. Oracle Cloud Infrastructure is now one of the fastest-growing cloud platforms, and Oracle's partnership with companies building large language models has positioned it at the center of the AI revolution. At 80+, Ellison remains actively involved in Oracle's strategy and is one of the wealthiest people alive.