Exhibit 99.1 N E W S R E L E A S E Contact: Investor Relations Inquiries Media Inquiries Jennifer Gilligan Sara Garland Senior Vice President, Finance & Investor Relations Chief Communications Officer (212) 549-1306 (314) 445-0790 FOR IMMEDIATE RELEASE CENTENE CORPORATION REPORTS SECOND QUARTER 2025 RESULTS -- Diluted Loss Per Share of $(0.51); Adjusted Diluted Loss Per Share of$(0.16) -- ST. LOUIS, July 25, 2025 -- Centene Corporation (NYSE: CNC) (the Company) announced today its financial results for the ...