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The company was founded in Little Rock in 1968 as Systematics, which was later acquired by ALLTEL Information Services as its Financial Services division. Alltell then sold this division to title insurance giant Fidelity National Financial in 2003, who renamed it Fidelity Information Services (FIS).
Throughout its history, FIS expanded through a number of acquisitions, including Certegy, eFunds Corporation, Metavante Technologies and SunGard. It acquired Worldpay in 2019, sold a majority interest in 2024, and sold its remaining ownership interest in January 2026. In January 2026, FIS acquired Global Payments ' Issuer Solutions business, formerly known as TSYS, for approximately $13.5 billion.