Exhibit 99.1 News Release FIS Reports Strong First Quarter 2024 Results and Increases Full-Year Adjusted EPS Outlook • First quarter GAAP Diluted Earnings (Loss) Per Share for continuing operations of $0.03 and Adjusted EPS of $1.10 • Including discontinued operations, first quarter GAAP Diluted Earnings (Loss) Per Share of $1.25 and Adjusted EPS of $1.33 • Continuing operations revenue increased 3% on a GAAP basis and 3% on an adjusted basis to $2.5 billion • Continuing operations adjusted EBITDA margin ex ...