Exhibit 99.1 N E W S R E L E A S E Contact: Investor Relations Inquiries Media Inquiries Jennifer Gilligan Shannon Susko Senior Vice President, Finance & Investor Relations Senior Vice President, Chief Communications Officer (212) 549-1306 (314) 445-0790 FOR IMMEDIATE RELEASE CENTENE CORPORATION REPORTS FIRST QUARTER 2024 RESULTS -- Diluted EPS of $2.16; Adjusted Diluted EPS of $2.26 -- -- Increases 2024 Full Year Guidance -- • 2024 adjusted diluted EPS of $2.26, up over 7% from $2.11 in the first quarter o ...