Sarah London

Sarah London became CEO of Centene Corporation in March 2022, succeeding founder Michael Neidorff who had built the company from a small Medicaid plan into the nation's largest Medicaid managed care organization. London, who was 42 at the time of her appointment, brought a technology and innovation background unusual for a health insurance CEO — she previously co-founded a healthcare technology company and held senior roles at Optum, UnitedHealth Group's technology and services division. London inherited a company with over 28 million members across Medicaid, Medicare Advantage, individual marketplace (ACA exchange), and TRICARE programs, generating over $150 billion in annual revenue. Her immediate challenge was the post-pandemic Medicaid redetermination process: during COVID, states paused eligibility reviews, swelling Medicaid rolls. When redeterminations resumed in 2023-2024, millions of members were disenrolled, directly impacting Centene's membership and revenue. London responded with a strategy she calls "value creation" — focusing on operational efficiency, technology modernization (including AI-driven utilization management and member engagement), margin improvement through medical cost management, and portfolio optimization (Centene divested non-core assets and pharmacy businesses). Her decisions on state contract retention and expansion, medical loss ratio management, technology investment levels, capital deployment between share buybacks and growth, and navigation of an increasingly politicized Medicaid landscape are the primary drivers of Centene's stock.