Exhibit 99.1 News Release FIS Reports Full-Year 2023 Results, Introduces 2024 Outlook, Raises Future Forward Expectations and Announces 500MillionIncreasetoShareRepurchaseGoal•FourthquarterGAAPDilutedEarningsPerShareforcontinuingoperationsof0.11 and Adjusted EPS of 0.94•Includingdiscontinuedoperations,fourthquarterGAAPDilutedEarningsPerShareof0.42 and Adjusted EPS of 1.67•Full−year2023GAAPDilutedEarningsPerShareforcontinuingoperationsof0.85 and Adjusted EPS ...