UnitedHealth Group unexpectedly replaced CEO Andrew Witty with returning former CEO Stephen Hemsley due to unspecified personal reasons. Witty will remain a senior advisor. The company's stock dropped 15% following the announcement, coinciding with ongoing Justice Department investigations and criticism of industry practices. UnitedHealth suspended its 2025 outlook due to higher-than-expected medical costs and expects growth to resume in 2026. This follows the December murder of UnitedHealthcare CEO Brian Thompson, for which a suspect is in custody.

Prepared by Christopher Adams and reviewed by editorial team.