Exhibit 99.1 Tenet Reports First Quarter 2024 Results Well in Excess of Guidance; Raises 2024 Financial Outlook • Net income from continuing operations available to common shareholders in first quarter 2024 was $2.151 billion, or $21.38 per diluted share, including an after-tax gain of $1.856 billion, or $18.45 per diluted share, associated with previously announced hospital divestitures • Adjusted diluted earnings per share from continuing operations1 was $3.22 in first quarter 2024 • Consolidated Adjusted ...