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UnitedHealth Group CEO Andrew Witty unexpectedly resigned for personal reasons, prompting the company to suspend its 2025 forecast. Shares plummeted nearly 10% premarket. The decision follows a year of challenges including government investigations, a cyberattack, rising medical costs, and public backlash. Stephen Hemsley, the former CEO, returns to the role. Higher-than-expected medical costs for Medicare Advantage plans contributed to the suspension of the outlook. The company projects a return to growth in 2026.

Prepared by Christopher Adams and reviewed by editorial team.