W illiam "Bill" Stone is a self-made American billionaire and the founder and CEO of SS&C Technologies, a major global provider of software and services for the financial services industry. An accountant by training, he founded the company in 1986 with a small investment from his own savings. He identified an opportunity to provide specialized software and back-office outsourcing services to investment managers, hedge funds, and other financial institutions.

Under his decades of leadership, SS&C has grown into a massive and highly profitable enterprise, primarily through an aggressive and highly successful strategy of acquiring other financial technology companies. He has overseen dozens of acquisitions, building a comprehensive suite of software and services that are deeply embedded in the operations of the global financial industry. He took the company public, then private, and then public again in 2010, and his large controlling stake in the company is the source of his multi-billion dollar fortune.