Exhibit 99.1 Tenet Reports Strong Second Quarter 2025 Results; Raises 2025 Financial Outlook DALLAS — July 22, 2025 — Tenet Healthcare Corporation (Tenet) (NYSE: THC) today announced its results for the quarter ended June 30, 2025. "Our strong second quarter results extend our track record of attractive same store revenue growth, operational performance driven by fundamentals, and robust free cash flow generation," said Saum Sutaria, M.D., Chairman and Chief Executive Officer of Tenet. "We continue to make ...